最新刊期
- 摘要：Achieving the simultaneous removal of gas-solid pollutants composed of respirable particulate matter (PM) and toxic gases under harsh high-flow operating conditions remains a key technical bottleneck in personal protection and environmental remediation. In confined occupational environments, PM frequently coexists with sulfur dioxide (SO2). However, many reported materials suffer from insufficient structural stability, poor interfacial compatibility, and limited selectivity under high-throughput and high-humidity conditions, thereby necessitating the development of multifunctionally integrated separation materials. Herein, a layer-by-layer self-assembly strategy was employed to construct a biomimetic armor-functionalized poly(lactic acid) nanofibrous membrane (LbL-APLA). Specifically, the membrane featured a polydopamine interlayer and in situ coordination‑grown bimetallic metal‑organic framework (BMOF) nanocrystals successively assembled onto the fiber surfaces. This hierarchical architecture imparted the composite membrane with an exceptionally high nanocrystal loading (72.3%), a large specific surface area (547 m2·g-1), and a high density of coordinatively unsaturated metal sites. To evaluate its performance under realistic conditions, tests were conducted under simulated high‑velocity airflow (85 L·min-1). Exploiting the synergistic mechanisms of size exclusion, electrostatic attraction, and graded pore confinement, the membrane attained an ultrafine PM0.3 removal efficiency of 96.7%, a high SO2 uptake of 6.2 mmol·g-1, and an outstanding SO2/N2 IAST selectivity of 6480 in a mixed gas stream. In addition, the high surface electroactivity and signal transduction capability of the multifunctional membrane provided a versatile material platform for self-powered health-monitoring systems, thereby addressing the long-standing trade-off among high dust tolerance, high gas permeability, and selective molecular recognition under complex operating conditions. This study offers a new structural design paradigm and reliable technical support for the development of next-generation integrated air-purification systems and intelligent environmental materials.关键词：Multiple active interfaces;Metal-organic framework functionalization;Poly(lactic acid) nanofiber;Particulate matter filtration;Selective separation17|2|0更新时间：2026-10-10
- 摘要：This study reports the preparation of novel degradable copolymers via ring-opening metathesis polymerization (ROMP) of bio-based oxanorbornene derivatives and 2,3-dihydropyrrole derivatives. First, oxanorbornene derivatives (OxaNBs) were obtained through a two-step process involving the reaction of bio-based furfuryl alcohol with itaconic anhydride followed by esterification. These derivatives successfully copolymerized with commercial N-benzyloxycarbonyl-2,3-dihydropyrrole (CBZDHP) using G3 as the initiator. The study revealed that CBZDHP cannot undergo homopolymerization by itself; instead, it was isolatedly distributed within the polymer chains after copolymerization. Importantly, the incorporation of CBZDHP via ROMP introduced cleavable enamide groups, providing potential sites for subsequent degradation. By varying the side-chain structures on the OxaNBs, the glass transition temperature and mechanical properties of the copolymers could be tuned. The copolymers exhibited significant degradation behavior under acidic conditions, with the degradation products confirmed as oligomeric fragments by NMR and SEC. This work offers a new route for constructing main-chain degradable functional polyolefin materials from renewable biomass resources via ROMP, holding potential application value in the fields of biomedical and environmentally friendly materials.关键词：Bio-based;Degradable polymer;Olefin ring-opening metathesis polymerization;Furfuryl alcohol;Itaconic anhydride43|3|0更新时间：2026-10-09
- 摘要：Developing novel bio-based flame retardants and exploring their application scope is of great significance for reducing environmental pressure. Carrageenan (CA), a sulfated galactan derived from marine red algae, possesses good potential for flame-retardant applications; however, the application as a flame retardant in flammable substrates is still very limited. This study proposed an adhesive using carrageenan as a flame-retardant additive and melamine-modified urea-formaldehyde (MUF) resin as the matrix for producing flame-retardant plywood. The polyhydroxy characteristics of carrageenan and its efficient catalytic dehydration and charring ability not only ensured good compatibility with the matrix but also enhanced flame retardancy in the condensed phase by promoting the formation of a dense intumescent carbon layer. Compared with plywood without carrageenan, the bonding strength of the plywood with 2.0% carrageenan addition was increased by 40.3%, with a glue line thickness of only 125 μm. During ignition, the after‑flame and after‑glow time were effectively shortened, heat release was reduced, the limiting oxygen index (LOI) was increased to 35.0%, and smoke suppression was also achieved, thus overall improving the fire safety rating of the plywood. This work provides new insights for the processing of flame‑retardant plywood and the application of carrageenan in the field of flame retardancy.关键词：Carrageenan;Flame retardancy;Plywood;Adhesive;Urea‑formaldehyde resin45|1|0更新时间：2026-10-09
- 摘要：In this work, tetraphenylethylene and chloranilic acid were selected as building units to synthesize a porous organic polymer (LNU-94) via the Friedel-Crafts reaction. Sulfonic acid groups were further implanted into its nanopores through a post-modification strategy, and the functionalized material LNU-94-SO3H with hydrogen-bonding networks and efficient proton transport pathways was successfully constructed. The highly hydrophilic sulfonic acid groups could induce the ordered arrangement of water molecules within nanopores, forming three-dimensional hydrogen-bonding networks and proton transport channels and thereby accelerating the diffusion of diclofenac (DCF) molecules. Meanwhile, a synergistic hydrogen-bonding interaction occured between sulfonic acid groups and DCF molecules, which further enhanced the adsorption binding capacity. Experimental results revealed that LNU-94-SO3H exhibited outstanding adsorption performance toward DCF, with a maximum adsorption capacity of 601.9 mg·g-1 at room temperature. Compared with pristine LNU-94, its adsorption capacity was approximately 4.5 times higher. The equilibrium adsorption rate of DCF on LNU-94-SO3H reached 53.34 mg·g-1·min-1. Compared with the reported mainstream porous adsorbents, the adsorption rate was increased by dozens of times, and the adsorption performance was significantly superior to that of existing similar materials. These remarkable properties verify the great application potential of LNU-94-SO3H in antibiotic wastewater treatment.关键词：Porous organic polymer;Post-modification;Adsorption;Antibiotics92|15|0更新时间：2026-10-09
- 摘要：Conjugated coordination polymers (CCPs) are a novel class of highly conductive crystalline porous materials formed by the hybridization of ligand π orbitals and metal d orbitals to create a continuous π-d conjugated system. As an emerging class of materials, CCPs have successfully broken the intrinsic insulating barrier of traditional metal-organic frameworks (MOFs). While achieving efficient charge transport, they retain the inherent advantages of high porosity and structural tailorability, making them a cutting-edge research frontier for next-generation energy storage battery electrode materials. This review systematically elaborates on the molecular design principles and mainstream synthesis strategies of CCPs, and deeply analyzes the regulatory mechanisms of ligand engineering, metal node regulation, dimensionality design, and functional modification on the electronic conduction, ionic transport, and ultimate electrochemical performance of the materials. Meanwhile, it comprehensively reviews the latest research progress of CCPs in lithium, sodium, potassium, multivalent metal, lithium-sulfur, and metal-air batteries. On this basis, this review objectively examines the core challenges that urgently need to be overcome in the current CCPs field, and prospectively proposes breakthrough pathways covering scalable mass production, multidimensional decoupling of structure-property relationships, in situ dynamic tracking with high spatiotemporal resolution, and full-cell system integration for future practical applications. This review aims to provide a theoretical roadmap and technical guidelines for the molecularly controllable design and large-scale engineering application of next-generation high-performance CCP-based energy storage paradigms.关键词：Conjugated polymers;Conjugated coordination polymers;Electrode materials;Energy storage batteries16|1|0更新时间：2026-10-09
- 摘要：Donor-acceptor (D-A) conjugated polymers show great promise in organic field-effect transistors and organic solar cells due to their intramolecular charge transfer, yet achieving large-area, precisely controlled molecular orientation remains challenging. Here, we employed an epitaxial crystallization strategy on oriented polyethylene (PE) substrates to fabricate highly oriented thin films of two D-A polymers, BDTI-2F2T and IIDSiC12. Angle-resolved polarized UV-Vis absorption and Raman spectroscopy revealed significant optical anisotropy and uniaxial molecular alignment in both films, while transmission electron microscopy and two-dimensional grazing-incidence X-ray diffraction confirmed uniform, dense morphologies with good crystallinity. Both polymers adopted an edge-on configuration with backbones parallel to the PE chain direction, establishing a clear epitaxial lattice relationship. Spin-coating from o-dichlorobenzene (5 mg/mL, 2000 r/min, 180 s) yielded dichroic ratios of 1.46 (686 nm) and 1.05 (696 nm) from polarized UV-Vis absorption, and four-lobed Raman patterns for C＝C stretching (1441 and 1435 cm-1) confirmed uniaxial order, with energy-dispersive X-ray spectroscopy showing homogeneous sulfur distribution. Lattice mismatches between the polymer (010) and PE (110) planes were only 5% for BDTI-2F2T and 3% for IIDSiC12, while IIDSiC12 exhibited denser π-π stacking (qπ-π=0.153 nm-1) than BDTI-2F2T (0.156 nm-1), favoring charge transport.关键词：Epitaxial crystallization;Conjugated polymers;Lattice matching;Structural control30|1|0更新时间：2026-09-22
- 摘要：Poly(vinylidene fluoride) (PVDF), as a core material for flexible piezoelectric polymers, exhibits piezoelectric properties that are highly dependent on the content of the electroactive β-phase. However, under conventional processing conditions, the β-phase is difficult to form efficiently and suffers from poor stability, which limits the application of PVDF in wearable sensing technologies. To achieve efficient induction and stabilization of the PVDF β-phase, this study selected calcium-polyoxometalate sub-nanowires (Ca-POM SNWs) with diameters of less than 1 nm as functional fillers. PVDF/Ca-POM composite films with varying filler loadings were fabricated via electrospinning. The regulatory effects of Ca-POM doping on the microstructure, crystalline phase composition, mechanical properties, and piezoelectric response of the composite films were systematically investigated. Based on the composite film with optimal performance, a flexible wearable piezoelectric sensor was constructed, and its environmental stability and potential for human physiological signal sensing were evaluated. The results indicated that Ca-POM SNWs drove the phase transition of PVDF from the α-phase to the β-phase through strong interfacial interactions, increasing the β-phase content of the composite films from 62.6% (for neat PVDF) to 81.0%. Concurrently, the fracture stress and toughness of the composite film reached 4.69 MPa and 170 MJ/m3, respectively, and the piezoelectric output voltage was enhanced by 1300% compared to that of the pure PVDF film. The flexible piezoelectric sensor fabricated from the PVDF/Ca-POM composite film maintained stable electrical responses under conditions ranging from -40 ℃ to 80 ℃, 30% to 80% relative humidity (RH), and in a simulated sweat environment. It exhibited a response time of 150 ms and a recovery time of 90 ms, enabling real-time and precise monitoring of human motion and physiological signals from various body parts, including fingers, wrists, elbows, and the throat. This study provides a new mechanism for the regulation of the PVDF crystalline phase using one-dimensional sub-nanometer fillers, and the prepared PVDF/Ca-POM composite film offers a novel strategy and experimental basis for the development of high-performance flexible wearable piezoelectric sensing materials.关键词：Subnanowires;Piezoelectric sensors;β-Phase regulation;Environmental stability;Wearable sensors11|0|0更新时间：2026-09-21
- 摘要：The development of high-performance solid-state electrolytes is key to enhancing the overall performance of next-generation solid-state lithium batteries. To address the common issues of traditional polymer solid-state electrolytes, such as poor mechanical strength, low ionic conductivity, and unsatisfactory interfacial stability, functional fillers are typically introduced. However, conventional inorganic fillers often exhibit poor compatibility with the polymer matrix, leading to phase separation and the formation of inactive pores, which in turn cause degraded mechanical properties, interrupted ion transport pathways, and exacerbated local side reactions. In light of this, we designed a class of cyano-modified rigid aromatic polyamide (CY-PPTA) functional fillers and further constructed a poly(vinylidene fluoride) (PVDF)-based all-organic quasi-solid-state composite electrolyte. The strong interactions between aromatic polyamide chains facilitated the formation of rigid nanoparticles. Moreover, owing to the synergistic effects of cyano and amide groups with PVDF, CY-PPTA not only served as a mechanical supporting skeleton to enhance the mechanical strength of the solid-state electrolyte, but also promoted lithium salt dissociation and lithium-ion migration, establishing continuous and efficient ion transport pathways (ionic conductivity of 8.12×10-4 S·cm-1). Furthermore, it induced the formation of a stable, LiF-rich SEI on the lithium metal surface, ultimately enabling stable long-term cycling of Li|LiFePO4 full cells (1300 cycles at 5.0 C). This work provides a new strategy for the development of novel solid-state electrolytes.关键词：Quasi-solid-state polymer electrolyte;Lithium metal battery;Organic filler;High mechanical strength;High ionic conductivity8|1|0更新时间：2026-09-21
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Study of Structure-Property Relationship in Silkworm Cocoons for Bio-inspired Design and Fabrication
摘要：To achieve an effective balance between lightweight structural materials and high mechanical performance, this study systematically investigated the structure-property relationship between the hierarchical structure of silkworm cocoons and their mechanical properties. Drawing bio-inspiration from these findings, we carried out the biomimetic design and fabrication of lightweight, high-strength structural materials. Through multiscale morphological characterization and mechanical testing, the structural origins of the lightweight and high-strength characteristics of silkworm cocoons were revealed. The gradient variation patterns of structural parameters and mechanical properties along the thickness direction were elucidated, and the synergistic regulation mechanism of porosity and fiber bonding strength on the mechanical response of the cocoon layer, as well as the significant contribution of the interlaminar interface to the overall mechanical performance, were clarified. Subsequently, solvent welding technology was introduced to achieve effective bonding between fibers within the fabric. By optimizing the topological structure, increasing the number of welding cycles, and adopting a multilayered composite strategy, the porosity, fiber bonding strength, and interlaminar bonding strength of the fabric are independently tuned, leading to a substantial improvement in the mechanical properties of the cocoon-layer-mimicking fabrics. The resulting multilayered composite fabric maintained lightweight characteristics while achieved specific strength and specific modulus of 117.4 MPa·g-1·cm3 and 1.55 MPa·g-1·cm3, respectively, surpassing the mechanical performance of natural silkworm cocoons. Through an integrated research framework of "mechanism elucidation-biomimetic design-performance optimization", this study provides a theoretical basis and technical pathway for the biomimetic design and fabrication of lightweight, high-strength structural materials. It holds promising application prospects in fields such as lightweight structural components for aerospace, high-strength composite materials for construction engineering, personal protective equipment, and tissue engineering scaffolds.关键词：Silkworm cocoons;Hierarchical structure;Structure-property relationship;Biomimetic design;Mechanical reinforcement66|2|0更新时间：2026-09-21 - 摘要：Using bovine serum albumin (BSA) and polyethyleneimine (PEI) as raw materials, an amyloid-like protein composite materials, PTB@PEI, was rapidly fabricated by employing tris(2-carboxyethyl) phosphine (TCEP) to break the intramolecular disulfide bonds of BSA, thereby inducing a conformational transition from α-helix to β-sheet and subsequent amyloid-like aggregation. Static adsorption experiments demonstrated that PTB@PEI exhibited excellent gold ions adsorption performance, with an adsorption efficiency of up to 93% and a maximum saturated adsorption capacity of 1270 mg/g. Mechanistic studies revealed that the gold ions recovery process proceeded through a synergistic mechanism involving electrostatic enrichment, coordination complexation, and in situ reduction. Under acidic conditions, the protonated amine groups in PEI efficiently captured [AuCl4]- through strong electrostatic interactions, while electron-rich sulfur-, nitrogen-, and oxygen-containing amino acid residues in BSA coordinated with Au(III). Subsequently, cysteine and tyrosine residues further reduced Au(III) to Au(0). Moreover, PTB@PEI displayed remarkable anti-interference capability and high selectivity in complex anionic systems, multi-metal coexisting systems, and aqua regia leachates of waste CPUs. This study provides a new strategy for the design and application of bio-based polymer materials for metal resource separation.关键词：Bovine serum albumin;Polyethyleneimine;Amyloid-like aggregation;Electronic waste;Gold ion adsorption16|1|0更新时间：2026-09-21
- 摘要：In view of the current issues of petroleum resource depletion, the greenhouse effect, and environmental pollution, the full development and high-value utilization of bio-based materials are in line with the current development concepts of the bio-economy and circular economy. At the same time, in response to the difficulty of balancing the high performance and recyclability of polyurethane materials, the development of high-performance and reusable polyurethane using bio-based polyols has attracted much attention. In this study, palm oil-based diethanolamide (POEA) was prepared by the ammonolysis of palm oil (PO) and used as a bio-based polyol to react with poly(tetramethylene ether glycol) (PTMEG-1000), isophorone diisocyanate (IPDI), and boric acid (BA). A series of palm oil-based polyurethane elastomers (POPU-BAs) with boron/nitrogen (B/N) internal catalytic dynamic covalent bonds were prepared. The results showed that the material exhibited excellent mechanical properties and thermal stability, with an initial thermal decomposition temperature higher than 200 ℃ and demonstrated good self-healing and repeatable processability. Among them, the POPU-BA2 sample achieved complete scratch repair after treatment at 120 ℃ for 2 h. The tensile strength and elongation at break after the first cycle of recycling reached 19.5 MPa and 299.1%, respectively, and the recovery efficiency reached 91.5% and 100.9%, respectively. Simultaneously, the polymer contains abundant polar groups and exhibits benign adhesion to various substrates underwater. This multifunctional polyurethane elastomer, which integrates bio-based sources, high mechanical strength, self-healing, and recyclability, provides a feasible technical strategy for the design and synthesis of polyurethane covalent networks derived from plant oil.关键词：Palm oil;Urethane elastomer;Self-healing;Recyclable32|1|0更新时间：2026-09-21
- 摘要：In this study, 6FDA and BPAF were selected for polymerization with TMPDA to produce six polyimides (PIs) via three imidization routes: one-pot, chemical, and azeotropic imidization. The effects of these synthetic routes on the molecular weight, thermal and mechanical properties, aggregation structure, and pore structure were systematically examined. The resulting membranes were comprehensively assessed for gas separation and anti-plasticization properties. The results demonstrated that the synthesis route profoundly affected the molecular weight, backbone rigidity, chain packing density, and pore structure, which collectively determine the physical properties and gas separation performance. This work elucidates the underlying mechanism by which the synthesis process governs the gas separation performance of PI membranes, offering theoretical insights and an experimental foundation to guide material design and process optimization for high-performance gas separation membranes.关键词：Polyimide;Gas separation;Imidization method;Membrane26|1|0更新时间：2026-09-21
- 摘要：Organic halides such as carbon tetrachloride (CCl4), ethyl α-bromophenylacetate (BPA), ethyl 2-bromoisobutyrate (EBiB), and ethyl 2-bromopropionate (EBP) were used to initiate the polymerization of methyl methacrylate (MMA) in the presence of palladium acetate (Pd(OAc)2). An ultrahigh molecular weight poly(methyl methacrylate) (PMMA) with a number average molecular weight (Mn) of 1.86×106 Da, a weight-average molecular weight (Mw) of 3.39×106 Da, and a polydispersity index (Mw/Mn) of 1.82 was synthesized at 60 ℃ using BPA as the initiator. The kinetic investigation of the polymerization indicated that the reaction orders with regard to MMA, BPA, and Pd(OAc)2 concentrations were 0.97, 0.60, and 0.88, respectively. The characterization results from proton nuclear magnetic resonance (1H-NMR) and matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry (MALDI-TOF MS) confirmed that the synthesized poly(methyl methacrylate) possesses two distinct end-group structures. X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) characterization results demonstrate that the palladium nanoparticles (Pd NPs) were converted into palladium bromide after polymerization, with a polymer film formed on the surface of the Pd NPs. The electron spin resonance (EPR) result revealed that the polymerization proceeds via a radical mechanism. Initially (conversion<1%), the color rapidly turned brown or black, indicating that Pd(OAc)2 had been reduced to Pd NPs, as confirmed by TEM. Mechanistic studies revealed that under heating conditions, Pd(OAc)2 was converted into Pd NPs owing to the reduction of MMA. Subsequently, the interaction between Pd NPs and residual BPA led to the formation of BPA-derived carbon radicals, which initiated the polymerization of MMA.关键词：Poly(methyl methacrylate);Ultrahigh molecular weights;Organic halides;Kinetics;Mechanism40|0|0更新时间：2026-09-21
- 摘要：Superamphiphobic surfaces that are both hydrophobic and oleophobic represent an important trend in the development and application of liquid-repellent surfaces. However, when subjected to external friction, the micro-nano rough structure of such surfaces causes a rapid decline or even loss of their superamphiphobic properties owing to wear. The addition of high-molecular-weight adhesives to superamphiphobic powders to construct composite coatings is the most commonly used method for enhancing the wear resistance of superamphiphobic surfaces. However, the effect is often not good because the superamphiphobic powder can be embedded in the adhesive. To address this issue, in this study, superamphiphobic nanopowders with superior performance were synthesized. Then, taking advantage of the property that high-molecular-weight adhesives dissolved in good solvents undergo phase transition and form spherical morphologies when added to poor solvents, an epoxy resin solution was dropped into a poor solvent in which superamphiphobic nanopowders were dispersed to trigger the phase transition. Subsequent ultrasonic treatment promoted the tight coating of superamphiphobic nanopowders on the surface of epoxy resin phase-transition droplets, forming fine and stable Pickering emulsion droplets. A superamphiphobic coating composed of multiple core-shell microspheres was obtained after spraying and curing. The superamphiphobic powder was located on the surface of the core-shell microspheres, ensuring that the superamphiphobic properties of the coating did not decline in the presence of the adhesive. The multi-layer self-similar structure also endowed the coating with good wear resistance characteristics. Tests showed that a coating with a thickness of approximately 60 µm could withstand 60 cycles of friction on a 400# sandpaper surface under a 200 g weight without significant loss of superhydrophobicity and retained a certain degree of oleophobicity. This method can be applied to any polymer adhesive that undergoes phase transformation in poor solvents, providing a reference for the preparation and application of wear-resistant superhydrophobic/superamphiphobic coatings.关键词：Epoxy resin;Superamphiphobic surface;wear resistance;Phase transformation;Pickering emulsion;Self-similar structure262|98|0更新时间：2026-09-21
- 摘要：AI-assisted materials research is promoting the transition of organic polymer materials research from experience-driven to data-driven approaches, which rely on high-quality, traceable data resources that are adaptable to specific research objectives. However, organic polymer materials have complex compositions and structures, diverse research scenarios, and data scattered across composition, preparation, characterization, testing, and property evaluation. Therefore, fixed-field or closed datasets are difficult to adapt to different research objectives. To address this issue, this study proposed a structured data extraction method and an open-source toolkit for organic polymer materials, oriented toward customized research objectives. The method converted multi-source heterogeneous documents into processable corpora and provided a customizable field schema and extraction workflow, enabling researchers to customize target properties, field contents, and document processing strategies for on-demand information extraction. Using 11 common properties as an example configuration, data extraction was performed on over ten thousand documents, yielding nearly fifty thousand structured property records. The property distributions and paired-property relationships were consistent with the common property ranges and empirical trends of organic polymer materials. Taking the glass transition temperature (Tg) as an example, the Precision, Recall, and F1 score for Tg value recognition were 0.83, 0.89, and 0.86, respectively, while the F1 score for sample name-Tg value pairing was 0.78. Without relying on annotated datasets or model fine-tuning, the proposed method allows researchers to define field schemas, target properties, and prompts according to their material systems and research objectives, providing a reusable pathway for customized database construction and target-oriented data resource development in organic polymer materials research.关键词：Polymer materials;Large language model;Data extraction;Customizable field schema11|1|0更新时间：2026-09-21
- 摘要：Enzymatic ring-opening polymerization (ROP) of cyclic monomers has emerged as a green and sustainable method for synthesizing biodegradable polymers. Among these materials, aliphatic polycarbonates have attracted considerable attention owing to their excellent biocompatibility, biodegradability, and diverse structures, with broad applications in tissue engineering, drug delivery, electronic materials, and packaging materials. Recently, a variety of functionalized biodegradable polycarbonates have been synthesized through the enzymatic ROP of cyclic carbonates in the presence of alcohol initiators. This review highlights the advances, challenges, and opportunities in the biocatalytic ROP of trimethylene carbonate (TMC), TMC derivatives, tetramethylene carbonate, and macrocyclic carbonates as monomers. This study provides guidance for the development of biosynthesis of polymers and biodegradable polymers.关键词：Enzymatic;Cyclic carbonate;Ring-opening polymerization;Initiator;Biodegradable132|54|0更新时间：2026-09-21
- 摘要：This work focused on the regulation of the microstructure and properties of thermoplastic polyurethane elastomers (TPUs) via poly(carbonate diol)/poly(caprolactone diol) (PCDL/PCL) co-soft-segments. Aiming at the drawbacks of PCL-based TPUs, including low tensile strength and dramatic deterioration of mechanical performances under UV aging, a semi-prepolymer two-step chain extension method was employed to fabricate a series of TPUs with varying PCDL/PCL ratios in co-soft-segments. A combination of multiple characterizations including Fourier transform infrared (FTIR) spectroscopy and atomic force microscopy (AFM), together with mechanical, abrasion-resistant, oil-resistant, hydrolysis-resistant and UV aging resistance tests, were utilized to systematically explore the effect of PCDL content on the microstructural evolution and comprehensive performances of TPUs. The experimental results revealed that raising the PCDL fraction strengthens intermolecular interactions among soft segments and promoted homogeneous dispersion of hard domains. Such structural evolution optimized the microscopic morphology of TPU matrix, endowed the material with a synergistic strengthening-toughening effect, and greatly enhanced its environmental durability. This work offers valuable guidance for material screening and molecular structure design of high-performance TPUs applied in outdoor decorative fields, and also proposes a novel technical strategy to boost the overall performances of TPU materials.关键词：Polyurethane elastomers;Poly(carbonate diol)/poly(caprolactone diol) co-soft-segments;Microphase separation;Strengthening and toughening;Environmental stability195|56|0更新时间：2026-09-21
- 摘要：With the rapid development of fields such as artificial intelligence, the demand for chips has significantly increased. As a key material in the production process of advanced chip packaging, the thermal curing speed of bottom filling adhesive severely limits the improvement of production efficiency. This study employed two structurally distinct alicyclic epoxy resins—3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate (ERL-4221) and bis(7-oxabicyclo[4.1.0]3-heptylmethyl)adipate (ERL-4299)—along with a thiolane curing agent, (4-hydroxyphenyl)(2-methylbenzyl)thiolane hexafluoroantimonate, to significantly reduce curing time through a thermal cationic curing system. Additionally, spherical silica modified with 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (KH-566) is incorporated as a filler, effectively lowering the thermal expansion coefficient (CTE) of the filling adhesive. All systems achieve curing within 20 min at 120 ℃, with Eq. (3) demonstrating outstanding thermal stability (glass transition temperature Tg=170 ℃, 5% thermal decomposition temperature Td,5%=386 ℃) and excellent rheological properties (viscosity at a shear rate of 10 s-1 was 8.4 Pa·s). In the glassy state (T < Tg), the CTE is 38.9 K-1, and the storage modulus E'=3.46 GPa. This research presents a bottom filling adhesive solution that integrates rapid curing, high heat resistance, and superior rheological performance, showing promising applications in advanced electronic packaging.关键词：Thionium salt;Cycloaliphatic epoxy resin;Rapid curing;High glass transition temperature203|1356|0更新时间：2026-09-21
- 摘要：Sequence-controlled polymers refer to polymers in which different monomer units are arranged in a specific order along the polymer chain. Their synthesis is regarded as the “Holy Grail” in the field of polymer chemistry. Among various synthetic strategies, olefin metathesis polymerization, including acyclic diene metathesis (ADMET) polymerization and ring-opening metathesis polymerization (ROMP), provides a powerful tool for constructing sequence-controlled polymers, owing to the excellent functional group tolerance and catalytic activity of ruthenium carbene catalysts. This review, based on the concept of modular monomer polymerization, focuses on the design of single monomers with well-defined sequence information and their olefin metathesis homopolymerization. It systematically summarizes the research progress of ADMET and ROMP in preparing main-chain and side-chain periodic sequence polymers, and discusses the influence of sequence structure variations on polymer properties. Finally, the current challenges and future development directions in this field are summarized and prospected.关键词：Sequence-controlled polymers;Acyclic diene metathesis polymerization;Ring‑opening metathesis polymerization;Polymerization regioselectivity41|2|0更新时间：2026-09-20
- 摘要：The high-value utilization of carbon dioxide (CO2) for the conversion into fine chemicals and polymer materials have been paid much attention in polymer science and green chemistry. Among them, the reaction of CO2 with diols to produce cyclic carbonates represents an important direction. Through the catalytic controlled ring-opening polymerizations of cyclic carbonates, polycarbonates with different structures and properties can be prepared. This review focuses on synthesis and ring-opening polymerizations of cyclic carbonates derived from CO2/diol reactions. The reactions of CO2 with 1,3-diol derivatives, 1,4-diol derivatives, and 1,5-diol derivatives were summarized in order with the target products of six-membered, seven-membered, and eight-membered cyclic carbonates. Catalytic ring-opening polymerizations of these obtained cyclic carbonates into polycarbonates were highlighted. Moreover, the challenges and opportunities in the related fields were discussed.关键词：Carbon dioxide;Diol;Cyclic carbonate;Ring-opening polymerization;Polycarbonate177|130|0更新时间：2026-09-20
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