最新刊期
- 摘要：This review comprehensively investigates how the molecular structures of metallocene catalysts govern the molecular structures of polyalphaolefins (PAOs), focusing on stereoregularity, regioregularity, and molecular weight. It also elucidates the critical relationship between PAO molecular structures and their performance properties. Specifically, it analyzes how key molecular parameters—including branch length, branch number, molecular weight, and stereochemistry—influence essential performance of base oil such as viscosity, viscosity index, pour point, crystallizability, shear stability, and tribological behavior. By synthesizing these structure-property-performance relationships, this article establishes a systematic framework for understanding the mPAO-based lubricants and serves as a foundational reference for developing high-performance mPAO-based lubricants.关键词：Metallocene catalyst;Poly(α-olefin) base oil;Structure-property relationship;Molecular structure104|26|0更新时间：2026-05-15
- 摘要：In recent years, porous hydrogels have demonstrated broad application prospects in fields such as drug delivery, tissue engineering, and flexible sensors, due to their highly tunable pore structure, large specific surface area, low density, and deformability. However, influenced by high porosity and high water content, porous hydrogels often suffer from insufficient mechanical properties. To address this challenge, we proposed a strategy based on the synergistic effect of salting-out and multiple crosslinking for preparing high-strength and high-toughness porous hydrogels. Utilizing the hydrogen gas generated by the in situ redox reaction between gallium-based liquid metal (LM) and the aqueous medium, rapid foaming of the system was driven to form a porous structure. Combined with hydrophobic association induced by the salting-out effect and the interaction of multiple physical-chemical crosslinks such as dynamic borate ester bonds, metal ion coordination bonds, and hydrogen bonds, an LMCNF porous hydrogel with high strength, high toughness, and high conductivity was fabricated. Experimental results showed that under optimal preparation conditions with an LM content of 7.5 wt%, PVA content of 16 wt%, and sodium citrate solution concentration of 20 wt%, the LMCNF porous hydrogel achieved a tensile strength of 1009.47 kPa, toughness of 1520.6 kJ/m3, elongation at break of 266.06%, and electrical conductivity of 8.39 mS/cm. Furthermore, the hydrogel exhibited a sensitive, stable, and reversible resistance response during compression, with a high gauge factor (GF up to 1.68) and a wide operating range. It also demonstrated excellent cyclic compression stability and fatigue resistance, maintaining its initial morphology after 100 compression cycles at 70% compressive strain. These characteristics highlight its potential applications in flexible electronic devices, smart sensors, and health monitoring.关键词：Liquid metal;High strength;Porous hydrogel;Salting-out;Electrical conductivity2|0|0更新时间：2026-05-15
- 摘要：Inspired by the self-repairing process and the branched structure of the loose connective tissue in the human body, we designed and synthesized molecular brush-based films with typical branched structures, which can achieve intelligent and effective self-repairing processes at room temperature without relying on dynamic covalent/noncovalent bonds. First, a macro-initiator (P(MA-Br)) was synthesized by reversible addition-fragmentation chain transfer homopolymerization based on the functional monomer containing an active bromine group (MA-Br). Subsequently, two types of molecular brushes were constructed by atom transfer radical polymerization: in each, a methyl group was installed at one side of the backbone, while poly(ethyl acrylate) or poly(butyl acrylate) side chains were densely grafted from the opposite side, labeling as PMA-g-PEA and PMA-g-PBA, respectively. 1H-NMR spectra and GPC traces certified that PMA80-g-PEA5 (8.70×104 g·mol-1, Đ=1.24), PMA80-g-PEA10 (1.26×105 g·mol-1, Đ=1.25), PMA80-g-PBA5 (9.1×104 g·mol-1, Đ=1.27), and PMA80-g-PBA10 (1.48×105 g·mol-1, Đ=1.25) were synthesized successfully. The self-repairing behaviors of the molecular brush-based films at room temperature, as well as under acidic, neutral, and alkaline conditions, were studied. It was proved that the molecular brush-based films have good self-repairing functions, stability against acids and alkalis, and elastic characteristics. Compared with the PMA-g-PEA film, the PMA-g-PBA film showed a higher repair efficiency, which was attributted to better flexibility and stronger mobility of butyl chians at room temperature. It made PMA-g-PBA more likely to achieve self-repair after being damaged, driven by the stronger van der Waals force. Finally, the biomimetic self-healing mechanism of the molecular brushes was explored through computer simulation. The main reason lied in the van der Waals interactions between the side chains and the chain interlocking effect. This work overcomes the conventional reliance of self-healing materials on specific covalent or dynamic noncovalent interactions, achieving efficient room-temperature self-repair solely through the synergistic effect of polymer topology—specifically, the densely grafted brush architecture—and intrinsic, ubiquitous van der Waals interactions among side chains. Our strategy establishes a paradigm for designing structurally simple yet functionally robust self-healing polymeric materials.关键词：Molecular brushes;van der Waals interactions;Self-healing;Biomimetic structure;Side chain entanglements4|1|0更新时间：2026-05-15
- 摘要：High-end damping sector of China relies heavily on imported constant-viscosity natural rubber (CV-NR) products. Differences in processing technology between domestic and imported CV-NR lead to the poor storage stability of domestic CV-NR, which in turn affects its structure and properties. In this study, three distinct post-processing approaches, namely non-baling, baling, and dry-mixed baling, were applied to the CV-NR. The intrinsic properties, micro-mesoscopic structure, and mechanical properties of vulcanizates were characterized to investigate the effects of different processing techniques on the structure and properties of CV-NR. The results demonstrated that the baling treatment exerted no significant influence on the intrinsic properties and micro-mesoscopic structure of CV-NR. In contrast, dry-mixed baling treatment reduced the Mooney viscosity, plasticity initial value, macrogel content, molecular weight, and branching degree. Furthermore, both baling and dry-mixed baling treatments showed negligible effects on the conventional mechanical properties of CV-NR, whereas the dry-mixed baling treatment imparted superior dynamic mechanical properties to CV-NR.关键词：Constant-viscosity natural rubber;Processing technique;Micro-mesoscopic structure;Mechanical properties77|16|0更新时间：2026-05-15
- 摘要：In response to the need for stretchability and environmentally friendly processing in flexible displays, we designed and synthesized a polyfluorene derivative, PDBFSiO, by incorporating hybrid siloxane side chains. Composite semiconductor films were constructed by blending the polymer with polydimethylsiloxane (PDMS) elastomers, and we found that the siloxane side chains effectively regulate the compatibility of the composite films, significantly suppressing phase separation and maintaining uniform morphology even at a PDMS content of 70%. This polymer exhibited blue emission with a thin-film photoluminescence quantum yield (PLQY) of 50.7%, along with good solubility in various green solvents while maintaining optical properties comparable to those in conventional toluene. This enabled the potential for eco‑friendly fabrication of stretchable displays. Polymer light‑emitting diodes (PLED) fabricated from both pristine and composite films showed promising deep‑blue electroluminescence. This study provides a viable molecular design strategy for developing flexible optoelectronic materials that combine stretchability, green processability, and high performance.关键词：Stretchability;Polyfluorene/elastomer;Composite semiconductor films;Hybrid siloxane;Green solvent124|23|0更新时间：2026-05-15
- 摘要：To address the issues of poor toughness and insufficient functionality of poly(ethylene terephthalate) (PET), a series of organosilane copolymerization-modified PET copolyesters (SPET) were prepared by the direct copolymerization of terephthalic acid (PTA) and ethylene glycol (EG) with dihydroxy-terminated polydimethylsiloxane (PDMS). In this study, the influence of the molecular weight of PDMS on its microstructure and macroscopic properties was investigated systematically. The results showed that the intrinsic viscosity [η] of all the synthesized SPET was greater than 0.7 dL/g, and the introduction of PDMS disrupted the regularity of the PET molecular chains, thereby reducing the crystallinity of SPET. When the molecular weight of PDMS was 2000 g/mol, microphase separation occurred between PDMS and PET, producing a nanoscale "island" structure at their interface, enhancing the mechanical properties of SPET. Among them, SPET2 exhibited excellent mechanical performance, with a tensile strength and elongation at break of 56.4 MPa and 502.8%, respectively, which were 12% and 43% higher than those of neat PET, respectively. The corresponding impact strength reached 11.68 kJ/m2, which was 4.7 times that of PET. Driven by thermodynamics, PDMS would migrate to and enrich the surface of SPET, decreasing the surface energy of SPET and endowing the SPET material with excellent antifouling and flame-retardant properties.关键词：Poly(ethylene terephthalate);Organosilane copolymerization;Toughening modification;Surface energy;Anti‑fouling74|16|0更新时间：2026-05-15
- 摘要：The high-performance development of ultra-high molecular weight polyethylene (UHMWPE) fibers has long been a central issue in high-strength and high-modulus polymer fibers, while the cooperative roles of raw material molecular weight, microstructure, and complex processing pathways remain insufficiently understood. In this study, spinning-grade UHMWPE resins with different molecular weights were investigated, focusing on gel spinning and multistage drawing as representative nonequilibrium processing routes. The relationships among the raw material structure, chain topological evolution, and drawing behavior were examined. It was found that increasing the molecular weight of the raw material alone did not directly improve the mechanical properties of the fiber; instead, its potential contribution was released through chain disentanglement and orientation reorganization during processing. Resins with a concentrated particle size distribution and moderate pore structures were more favorable for homogeneous swelling and the formation of stable gel network structures. By coordinating the screw temperature and rotational speed, the molecular weights of the gel fibers derived from different initial viscosity-average molecular weights were regulated and converged to approximately 3.60×106 g/mol. However, different temperature-shear pathways introduced path-dependent nonequilibrium chain topologies, which persisted during subsequent drawing as topological memory effects and continuously influenced the chain flexibility and fiber mechanical performance. Systems with higher chain flexibility, particularly those with intermediate molecular weights, were more suitable for achieving a high draw-ratio orientation. Overall, the results suggest that the high-performance fabrication of UHMWPE fibers depends on the cooperative regulation of chain topology and drawing kinetics rather than molecular weight maximization alone, providing a basis for structure-process design in UHMWPE fiber manufacturing.关键词：Ultra high molecular weight polyethylene;Gel spinning;Topological memory effect;Drawing behavior;Mechanical properties109|96|0更新时间：2026-05-15
- 摘要：Lithium metal anodes, with their ultrahigh theoretical specific capacity, are regarded as ideal candidates for next-generation high-energy-density batteries. However, its practical application is hindered by uncontrolled dendrite growth, severe interfacial side reactions, and significant volume change. The low lithium-ion transference number of conventional liquid electrolytes exacerbates the ionic concentration gradients at the electrode surface, further aggravating these issues. This study proposed and validated a facile photopolymerization strategy for constructing a rigid-yet-flexible ion-organic composite layer (IOL) on a lithium metal surface. This IOL was composed of inorganic cubic-phase garnet (Al/Nb-LLZO) particles with high ionic conductivity and mechanical rigidity, compounded with an elastic organic matrix of bisphenol A-glycerolate dimethacrylate (Bis-GMA). Systematic characterization confirmed that the composite IOL exhibited an ionic conductivity of 2.3×10-5 S/cm and a high Li+ transference number of 0.82, which homogenized the Li+ flux and accelerated interfacial transport. Meanwhile, its synergistic rigid-flexible structure physically suppressed dendrite growth while accommodating volume changed during cycling and maintaining intimate interfacial contact. Electrochemical performance tests demonstrated that the IOL-modified symmetric cell exhibited ultralow and stable polarization (about 0.15 V) for over 3000 h. When paired with an NCM811 cathode, the full cell with a limited lithium source exhibited significantly enhanced cycling stability. Post-mortem microscopic analysis further revealed that the IOL guided the lithium metal to deposit in a dense and planar morphology, effectively suppressing "dead Li" formation and parasitic reactions. This study provides an efficient and scalable solution for concurrently addressing the kinetic, mechanical, and chemical stability challenges of lithium metal anodes from an interfacial engineering perspective, offering crucial insights for advancing the practical application of high-energy-density lithium metal batteries.关键词：Lithium metal anode;Composite interface layer;Dendrite suppression;Photopolymerization226|162|0更新时间：2026-05-15
- 摘要：In this work, a novel double-spiro mechaophore ISO-ABPX fused be catechol was designed and synthesized, and its photochromic and mechanochromic behaviors and mechanisms in polyurethane (PU) and double-network elastomer (PMA-PU) were systematically investigated. It was found that under both 365 nm ultraviolet light irradiation and external pressure, ISO-ABPX only underwent the ring-opening reaction of a single spiro group, generating the open-closed state (ISO-ABPXOC), which showed characteristic absorption bands at 520 and 557 nm, accompanied by a significant enhancement of fluorescence at 592 nm. The second spiro ring remained stable under both light and mechanical stimuli and was difficult to open. By constructing a double-network structure (PMA-PU), the photochromic response of the material was significantly suppressed, while the mechanochromic behavior remained prominent, demonstrating its selectivity in response to stimuli. The study also revealed that the ISO-ABPX@PU system reversibly returned to the initial closed-ring state after heating at 40 ℃, indicating good reversibility. Theoretical calculations (CoGEF) further revealed that the force required to break the C―N bond of the spiro group was approximately 4.37 nN, which supports the experimentally observed single spiro ring-opening pathway from an energy perspective. This work not only expands the structural types of bis-spiro force-responsive molecules but also provides new molecular design strategies and experimental evidence for the development of intelligent mechanical sensing materials with reversible and multi-state response properties.关键词：Double-spiro mechanophore;Polymer mechanochemistry;Mechanochromism;Photochromism;Double-network elastomer109|20|0更新时间：2026-05-14
- 摘要：To address the growing global carbon emissions and rising plastic pollution crisis, developing efficient catalytic systems for the ring-opening copolymerization (ROCOP) of CO2 and epoxides has emerged as a critical frontier in green polymer synthesis. Herein, we report the design and synthesis of a novel class of tri-centered aluminum porphyrin complexes (T-TPPAl). By constructing a ligand with a rigid conjugated backbone via a one-step acylation reaction, the synergistic effect among the active centers was significantly enhanced. This catalyst demonstrated superior efficacy in the copolymerization of CO2 and propylene oxide (PO), achieving a maximum polymer selectivity of 98.4% and a carbonate unit content exceeding 96.4%. Systematic studies revealed a significant dependence of catalytic performance on CO2 pressure. High selectivity and high carbonate content were obtained at moderate pressures (3-7 MPa). Notably, under supercritical CO2 conditions, the enhanced synergistic effect of active sites significantly accelerated the activation and consecutive ring-opening insertion of epoxides, leading to an increased proportion of polyether segments and decreased carbonate unit content, while the polymer selectivity remains high. The successful development of this high-performance multi-centered aluminum porphyrin catalyst provides robust theoretical support for structural regulation and process optimization. Furthermore, it opens new avenues and perspectives for the industrial synthesis pathways of green polymeric materials.关键词：Aluminum porphyrin complex;Synergistic Catalysis;Carbon dioxide;Propylene oxide;Ring-opening copolymerization109|42|0更新时间：2026-05-14
- 摘要：Carbon fiber-reinforced phthalonitrile (CF/APN) composites suffer from low through-thickness thermal conductivity, which limits their application in high thermal conductivity fields. To address this issue, in this work, two types of phthalonitrile resin (APN) microspheres with average particle sizes of 25 μm and 200 μm were first prepared via reaction-induced phase separation. Subsequently, few-layer graphene (FLG) was coated on the surface of the microspheres to obtain APN25@FLG and APN200@FLG core-shell particles. These APN@FLG particles were introduced into the CF/APN composite system as thermally conductive fillers, and their effects were compared with the direct addition of FLG. The regulation of core-shell particles on the thermal conductivity of composites and their influence on mechanical properties were systematically investigated. The results demonstrated that the modification strategy incorporating APN@FLG particles exhibited a significantly superior thermal conductivity enhancement effect over the direct addition of FLG. The APN resin microspheres in APN@FLG could effectively impede the in-plane orientation of FLG under molding pressure, thereby remarkably improving the through-thickness thermal conductivity of the composites. At an FLG loading of 3.6 wt%, the through-thickness thermal conductivity of the APN200@FLG/CF/APN composite reached 1.62 W/(m·K), representing a 189% increase compared to the unmodified CF/APN composite. Meanwhile, the interlaminar shear properties of the composites remained largely unchanged after the introduction of APN@FLG particles, while the flexural strength decreased slightly only at relatively high particle loadings. This study provides an efficient and feasible novel strategy for the design and preparation of high-performance thermally conductive composites.关键词：Phthalonitrile;Carbon fiber;Thermal conductivity;Few-layer graphene;Orientation184|60|0更新时间：2026-05-14
- 摘要：Polymerization-induced self-assembly (PISA) has emerged as a highly efficient strategy for the synthesis of high-solid-content nano-objects with diverse morphologies, which has attracted growing interest in polymer chemistry and nanomaterials. In recent years, the ring-opening metathesis polymerization (ROMP) of cyclic olefin monomers has been used in PISA because of its good controllability, high tolerance for functional groups, and availability for sterically hindered monomers. Ring-opening metathesis polymerization-induced self-assembly (ROMPISA) has been demonstrated as a powerful platform for the preparation of a series of polyolefin block copolymer nano-objects containing unsaturated double bonds in the main chain. This review focuses on the advances in ring-opening metathesis polymerization-induced self-assembly. The morphologies, functions, and applications of nano-objects from ROMPISA are summarized from the perspectives of the organic, aqueous, and organic/aqueous phases, respectively. Challenges and opportunities are discussed to provide insights into the further development of polymerization-induced self-assembly.关键词：Ring-opening metathesis polymerization;Polymerization-induced self-assembly;Block copolymer;nano-object181|146|0更新时间：2026-05-13
- 摘要：Humanoid robots represent a pivotal physical carrier for embodied intelligence, demonstrating significant developmental potential and broad application prospects. Polymers, featured by the merits such as low density, high specific strength, ease of processing, and tunable functionality, are increasingly being utilized in load-bearing and functional components of humanoid robots. This article reviews recent research achievements in polymers for humanoid robotic applications. Placing focus on key performance requirements for lightweight skeletal structural materials, bionic skin materials, and intelligent sensing-actuation materials, this review elaborates on advances in microstructural design, functional network construction, preparation and processing methods, as well as structure-property relationships. Finally, current challenges and future development directions in this field are discussed and summarized.关键词：Humanoid robots;Polymers;Skeletal materials;Skin materials;Sensing-actuation materials257|594|0更新时间：2026-05-13
- 摘要：Foamed expanded graphite (EG)/thermoplastic polyurethane elastomer (TPU) composite sheets were prepared using melt blending, supercritical fluid foaming, and other processes. Capacitive pressure sensors were assembled by adopting these foamed sheets as the dielectric layer. Thus, the influence of EG and supercritical fluid on the pressure-sensing performance was studied, and the influence mechanism was revealed. The results showed that EG could effectively increase the permittivity of the EG/TPU composites and the sensitivity of the corresponding sensor, which was related to the interfacial polarization between the introduced EG layers and the TPU matrix. By conducting supercritical fluid foaming on the EG/TPU composites, three-dimensional microcellular structures were effectively constructed, and the foaming process enhanced the deaggregation of the EG aggregates in the composites with higher EG content. The former could effectively increase the thickness variation of the dielectric layer during the compression process and cause a large amount of low-permittivity air to be replaced by high-permittivity EG/TPU solids during compression, thereby effectively increasing the apparent permittivity change of the dielectric layer during the compression process. The latter was favorable for forming the micro-capacitance structure of the EG layer-air-EG layer within the dielectric. The functions of the above two aspects could significantly improve the sensitivity values of the micro-cellular EG/TPU sensors: compared with the 1.5 wt% EG composite, the sensitivity in the medium-pressure region was increased by approximately 71 times after foaming. The test results of other performances and applications of the sensor showed that the capacitive pressure sensor based on the foamed EG/TPU sheets exhibited low resolution (as low as 0.5 N), low pressure detection limit (as low as 1 kPa), and good cyclic stability. It had a good application prospect in movement monitoring for wrist bending, finger grasping and sitting/standing.关键词：Expanded graphite;Thermoplastic polyurethane elastomer;Supercritical fluid foaming;Capacitive pressure sensing;Motion monitoring0|0|0更新时间：2026-05-13
- 摘要：In photocatalytic reactions, the intrinsic properties of photocatalysts directly determine reaction efficiency. However, existing photocatalysts commonly suffer from critical issues such as severe recombination of photogenerated charge carriers, limited surface active sites, and insufficient hydrophilicity, which severely constrain their practical applications. To address these challenges, this study systematically introduced β-mercaptoethylamine functional groups into the carbazole-based conjugated porous polymer PEC via a thiol-alkyne click reaction, constructing a series of porous polymer photocatalysts (PEC-1, PEC-4, PEC-8) with varying modification equivalents. Through systematic photoelectrochemical and photocatalytic characterization, the regulation mechanism and structure-function relationship of β-mercaptoethylamine functionalization on carrier behavior, surface properties, and photocatalytic activity were investigated. The results indicate that grafting β-mercaptoethylamine significantly promotes the separation and migration of photogenerated carriers while effectively enhancing the surface hydrophilicity of the material, thereby synergistically improving photocatalytic reaction kinetics. Among these, PEC-4 exhibited optimal performance in photocatalytic H2 production, achieving an average H2 production rate of 184.2 μmol·h-1 (10 mg catalyst) under visible light irradiation and an apparent quantum efficiency of 2.1% at 450 nm. Furthermore, this porous functionalized polymer photocatalyst demonstrated excellent structural stability and catalytic durability during multiple cyclic reactions. This study provides a feasible new strategy for the precise functionalization design and performance regulation of conjugated porous polymer photocatalysts, offering important experimental evidence and theoretical references for the rational construction of highly efficient photocatalytic materials.关键词：Carbazole-based porous polymers;Mercaptoethylamine modification;Photocatalysis;Charge carrier separation and transfer;Hydrophilicity120|34|0更新时间：2026-05-13
- 摘要：Biomass-based self-healing polymers combine the sustainability of renewable resources with intelligent repair capabilities, demonstrating unique promise for advancing green materials. In recent years, with the rapid progress in dynamic chemistry, the construction of self-healing materials from biomass has become an important research direction in polymer science, which not only expands the functional boundaries of traditional polymers but also provides new pathways for material recycling and lifespan extension. This review systematically outlines the design strategies of biomass-based self-healing polymers, focusing on the design principles and healing mechanisms of dynamic covalent bonds (e.g., imine, disulfide, and boronic ester bonds), dynamic non-covalent interactions (e.g., hydrogen bonding, metal coordination, and electrostatic interactions), and synergistic multi-dynamic bonding systems. Furthermore, self-healing polymer systems developed from various biomass sources, including polysaccharides (such as cellulose, starch, and chitosan), lignin, vegetable oils, proteins, natural rubber, Eucommia ulmoides gum, and other distinctive biomaterials (e.g., DNA, tea polyphenols, itaconic acid, and lipoic acid), are summarized. The healing behaviors and performance characteristics of these materials under different stimuli (e.g., heat, light, moisture, and pH) were analyzed. These materials have broad application potential in fields such as flexible electronics, biomedical devices, smart coatings, sensors, and sustainable packaging. Finally, the challenges and future development trends in this emerging field are discussed.关键词：Biomass materials;Self-healing polymers;Dynamic bonds;Sustainable materials;Applications104|52|0更新时间：2026-05-13
- 摘要：Metal-organic framework (MOF) have highly ordered porous structures and ultra-large specific surface areas, attracting extensive attention in materials science. However, challenges remain in their antibacterial applications, such as insufficient structural stability, limited biocompatibility, and difficulty in precisely controlling the release behavior. Integrating MOFs with polymeric materials can enhance their antibacterial performance, improve processability, and reduce biological toxicity. Therefore, the preparation of MOF-based polymers can effectively expand the scope of MOF applications. This paper reviews the research progress on MOF-based polymeric antibacterial materials over the past five years in terms of synthesis strategies, antibacterial mechanisms, and applications, providing a reference for designing and developing high-performance MOF-based antibacterial materials.关键词：MOF-based polymer;Antibacterial materials;Synthesis strategy;Antibacterial mechanism;Application progress106|27|0更新时间：2026-05-12
- 摘要：Using dimethyl oxalate (DMO), dimethyl carbonate (DMC), and 1,4-butanediol (BDO) as raw materials, a series of high-molecular-weight poly(butylene oxalate-co-butylene carbonate) (PBOC) were successfully synthesized via a two-step transesterification polycondensation method, the effect of the butylene carbonate (BC) segment content on the structure and properties of PBOC was investigated. It was found that PBOC was a random copolymer of BC and poly(butylene oxalate) (PBO), exhibiting a single glass transition temperature (Tg), which decreased with increasing BC content. The introduction of BC segments would disrupt the regularity of the PBO molecular chains, significantly inhibiting the crystallization ability of PBO, and the melting temperature, crystallinity, and crystallization rate of PBOC all decreased with increasing BC content. The mechanical properties, barrier properties, and degradation performance of PBOC could be effectively controlled by adjusting the BC content. When the BO content is 80%, the obtained PBO80C achieved a tensile strength of 48 MPa and an elongation at break of 600%. Taking the permeability coefficient of commercial poly(butylene succinate-co-terephthalate ) (PBST) as a reference, the barrier improvement factors of PBO80C for O2 and H2O, BIFp (O2) and BIFp (H2O), are 6.4 and 5.2, respectively, much higher than those of other commercial copolyesters. This study provides a valuable reference for the research and development of high-performance biodegradable materials.关键词：Transesterification polycondensation;Fully biodegradable polymer;Poly(butylene oxalate-co-butylene carbonate);Random copolymer;Barrier property119|118|0更新时间：2026-05-12
- 摘要：Solar-driven desalination holds significant potential for addressing global freshwater shortages. However, evaporators after prolonged operation commonly face challenges related to difficulty in recycling and degradation, which severely impacts the sustainable application of this technology. Inspired by paper recyclability and the traditional Chinese origami techniques, a recyclable origami-style evaporator was prepared using Enteromorpha prolifera cellulose as the main material mixed with pulp fibers, and graphene nanoplatelets were introduced to enhance its photothermal conversion performance. Under 1.0 kW·m-2 illumination, the evaporator achieved an average evaporation rate of 2.20 kg·m-2·h-1. Outdoor experimental results demonstrated its effective removal capability for typical ions in seawater, including K+, Ca2+, Na+, and Mg2+, with a removal rate exceeding 99%. After recycling and re-preparation, the regenerated evaporator maintained an evaporation rate of 1.95 kg·m-2·h-1. This work not only provides novel structural inspiration for efficient desalination but also offers a sustainable solution to evaporator recyclability and the environmental issue of Enteromorpha prolifera blooms along the Chinese coastline.关键词：Enteromorpha prolifera;Cellulose;Desalination;Photothermal conversion;Recyclability243|129|0更新时间：2026-05-11
- 摘要：High-performance regenerated cellulose materials rely on the precise regulation of aggregate structures, particularly the long-range ordered alignment of molecular chains. However, conventional regeneration is generally hindered by cellulose chains' strong tendency toward disordered aggregation, making it difficult to achieve directional assembly of microstructures. The alkali/urea aqueous system provides an ideal precursor for alignment via dynamic inclusion complexes, enabling the low-temperature non-derivatizing dissolution of cellulose and thereby offering an ideal homogeneous precursor for the construction of ordered structures. Recently, an "oriented crosslinked network" strategy has been established based on this system under hydrogen-bond shielding. In this strategy, cellulose chains remain dissolved via dynamic inclusion complexes, while intra- and intermolecular hydrogen-bond interactions are temporarily screened. Chemical crosslinking is then used to construct a covalent topological network, transforming the deformation mechanism from the random motion of individual chains to the cooperative deformation of the network. Subsequently, external fields are employed to induce orientation, followed by the permanent locking of the aligned structure via hydrogen bond reconstruction triggered by the dissociation of inclusion complexes. This review summarizes the mechanisms by which crosslinked network topology regulates molecular-chain conformation and discusses orientation-induction methods, including flow fields, mechanical stretching, and microfluidic techniques. Particular emphasis is placed on how highly oriented structures can overcome the strength‒toughness trade-off and improve functional properties. In addition, recent advances in micro-Raman imaging for in situ characterization of multiscale orientation distribution and microscopic stress transfer are highlighted, underscoring its unique advantages in elucidating structure-property relationships. Finally, future prospects in this field are discussed.关键词：Cellulose;Alkali/urea system;Crosslinked network orientation;Raman imaging;High performance5|0|0更新时间：2026-05-09
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