最新刊期
卷 ， 期 2 ， 2010
- 摘要：The surface modification of polymers on carbon nanotubes(CNTs) by means of covalent and noncovalent methods were summarized.The dispersibilityof the modified CNTs in aqueous solutions,polar organic solvents or polymer matrices is improved through modification.The uniform dispersion of CNTs is an important prerequisite for realizing CNT arrays.In this article,the vertical and horizontalalignment methods of CNTs with polymer assistance,as well as the recent progress in research on alignment and assembly of CNTs were reviewed on the aspect of post-growth ways.Polymers could play an importantrole in the surface modification of CNTs and the realization of CNT arrays.Moreover,polymer induced selfassembled alignment of CNTs provides a new approach to achieving the control of individualCNT and the fabrication of nanoscaled functional devices.
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发布时间：2021-03-19
Reviews
- 摘要：A amphiphilic block copolymer of polybutadiene(PB)-b-poly［2-(dimethylamino)ethyl methacrylate］(PDMAEMA) was synthesized by transformation of living anionic polymerization into atom transfer radical polymerization(ATRP).The macroinitiator,PB containing the 2-bromoisobutyryl end group(PB-Br) was attempted by anionic polymerization of butadiene with butyllithium initiator,then the living PB was chain extended with propylene oxide (PO) and terminated by 2-bromoisobutyryl bromide (BriBBr).By using PB-Br with controlled molecular weight(Mn = 5.7×103),high bromine content (the bromating efficiency，92.1%) and low polydispersity (Mw/Mn = 1.07) as macroinitiator and CuBr/N,N,N′,N″,N″pentamethyldiethylenetriamine (PMDETA) as catalyst and ligand,ATRP of hydrophilic DMAEMA was realized at 50℃.Kinetics studies reveal a controlled/living polymerization for DMAEMA.The GPC curve of the diblock copolymer indicates a successful initiation and growth of the second block,showing a symmertrical peak due to the removal of uninitiated marcoinitiator.Microphase separation behavior of the diblock copolymer was studied by DSC technique.The properties of the PB-Br and amphiphilic block copolymer PB-b-PDMAEMA were characterized by 1HNMR,FTIR in detail.Polydispersity of the diblock copolymer remained low (Mw/Mn= 1.27) for ATRP of DMAEMA.Estimated by 1H-NMR,the resulting copolymer was expressed as PB(10)-b-PDMAEMA(23).The results show that well-defined target products with controlled molecular weight and low dispersity were obtained.
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发布时间：2021-03-19 - 摘要：A series of amphiphilic graft copolymers PHFMA-g-PEG comprising of poly(hexafluorobutyl methacrylate) (PHFMA) backbones and poly(ethylene glycol) (PEG) side chains were synthesized by copolymerization of HFMA and an SPEG macromonomer with a p-vinylbenzyl end group. The SPEG macromonomer was synthesized by reaction of PEG with p-chloromethylstyrene in THF in the presence of NaH. The resultant macromonomer and amphiphilic graft copolymers were characterized by 1H-NMR, 19F-NMR and GPC. The HFMA contents in the graft copolymers were calculated by the (—OCH2—CF2—) protons (δ = 4.19) for HFMA and (CH3O—) proton (δ = 3.38) for SPEG macromonomers from 1H-NMR spectra. The critical micelle concentration (CMC) of amphiphilic graft copolymers was measured by surface tension technique, and it showed that the CMC decreased with the increase of HFMA content in the graft copolymers. The interactions between PHFMA-g-PEG and bovine serum albumin (BSA) were studied by fluorescence spectroscopy, photon correlation spectroscopy (PCS) and transmission electron microscopy (TEM). The fluorescence spectrum showed that the fluorescence intensity of BSA increased in PHFMA-g-PEG/BSA solution driven by hydrophobic interactions of fluorinated segments, with increasing ratio of HFMA in PHFMA-g-PEG and increasing concentration of PHFMA-g-PEG, the fluorescence emission intensity of BSA also increased. PCS showed that when BSA was added into PEGF39 aqueous solution, the hydrodynamic diameters and distribution of micelles were increased. TEM micrographs showed that PHFMA-g-PEG mainly formed core-shell structure micelles, when BSA was added, micelles changed into vesicle like core-shell structures. This study may suggest that PHFMAgPEG is a potential copolymer for loading proteins or other hydrophilic bioactive drugs.
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发布时间：2021-03-19 - 摘要：In order to clarify the interaction between the continuous phase and the dispersion phase rich in polyacrylamide(PAM),the interaction between PAM and PEG in water was studied by viscosity method.In a dilute aqueous solution of PAM,the segments of PAM molecular chains prefer to combine with water molecules through hydrogen bonding.However,the hydrogen bonding between PAM molecular chains increased with increasing concentration of PAM in water.Because the aqueous PEG solution is a poor solvent for PAM,the PAM molecular chains aggregated with each other and formed compact spherical clews.PEG molecular chains were then congregated around the PAM clew through the hydrophobic interaction,and entwisted on the surface of the PAM clew through hydrogen bonding between PAM and PEG.It was found that the interaction was strengthened with increasing the total polymer concentration,and the molecular weight of PEG or PAM.The strength of the interaction between PAM and PEG in water seems to be not changed markedly with rising temperature.The interaction was a little stronger at higher or lower temperatures.Raising the temperature destroyed the hydrogen bonding between PAM and PEG chains at first.However,the hydrogen bonding between PAM chains and water molecules was also reduced while raising the temperature sequentially.Therefore,the hydrophobic interaction between PAM and PEG in water was increased.The addition of ethanol,salt,acrylamide or urea reduced the hydrogen bonding between the PAM and PEG,and therefore the interaction between PAM and PEG in water was weakened whereas the hydrophobic interaction between PAM and PEG was increased.
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发布时间：2021-03-19 - 摘要：A series of water-soluble comb-like copolymers of poly(acrylic acid-co-methoxypolyethylene glycol monomethacrylate)(P(AA-co-mPEGMA)) with different compositions and structures were synthesized by freeradical copolymerization of acrylic acid and methoxypolyethylene glycol monomethacrylate(mPEG1000MA) or mPEG2000MA macromonomers,sodium methyl allyl sulfonate(SMAS) in aqueous solutions.The intrinsic viscosity of comb-like P(AA-co-mPEGMA) copolymers,measured by using Ubbelohde viscometer,was used as a factor to characterize the molecular weight.Crystallization behavior of the mPEG side chains in comblike copolymers was studied by DSC that allowed accurately measuring melting point,crystallization temperature as well as melting enthalpy.The results indicated that the crystallization of the mPEG side chains proceeded under a confined condition created by the glassy PAA main chains.It was shown that the melting point,crystallization temperature and melting enthalpy of mPEG side chains were different from those of the pure PEG chains and were significantly affected by many structural factors such as the side chain density,side chain length and main chain length etc.
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发布时间：2021-03-19 - 摘要：In order to improve the mechanical properties of SMPU,vapor grown carbon fiber(VGCF) reinforced SMPU composite films with various VGCF contents were prepared via a solution mixing method.The mechanical and shape memory properties of the pure SMPU and VGCF/SMPU composite films were studied.The results show that,the VGCF still shows good dispersion in SMPU when the VGCF content reaches 9 wt% in the prepared composite film.The tensile strength and stiffness of the prepared composite films are greatly improved after compounding SMPU with VGCF,the tensile strength is improved by 66% with adding 9 wt% VGCF in the composite film,the elastic modulus is improved by 300% at this content and the storage modulus is also greatly improved.The shape memory property of the composite film is decreased after compounding SMPU with VGCF,while its shape memory property can be close to that of the pure SMPU after appropriate pretreatment.
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发布时间：2021-03-19 - 摘要：A series of polybenzobiso xazoles, including PBO, poly(1,4-naphthalene benzobisoxazole) (1,4-PNBO),poly(2,6naphthalene benzobi soxazole) (2,6PNBO), poly(2,5-thiophene benzobisoxazole) (PTBO) and poly-4,4′-(1,2-diphynylethylene benzobisoxazole) (4,4′-PDPEBO), were synthesized by polycondensation of 4,6-diamino-1,3-benzenediol dihydrochloride with terephthalic acid, 1,4-naphthalene dicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,5-thiophenedicarboxylic acid and 4,4′-(1,2diphynylethylene)dicarboxylic acid in polyphosphoric acid, and the relationship between the resulting polymer chain structures and the properties of the polybenzobisoxazoles was investigated.The results showed that the target polymers were successfully synthesized proved by Fourier transform infrared spectra and elemental analysis.And the thermal stability of PBO, 1,4-PNBO, 4,4′-PDPEBO, 2,6-PNBO and PTBO decreased in turn from thermal gravimetric analysis.The reasons are that 1,4-phenylene chains in the PBO possesses the best rigidity among all the polybenzobisoxazole chains.And CC bonds in ethylidene of 4,4′-PDPEBO are easy to be broken under high temperature, even though 4,4′-PDPEBO has two phenylene chains, and so 4,4′-PDPEBO has worse thermal resistance compared with PBO and 1,4-PNBO.Bond energy of C—S bonds in PTBO chains is less than that of CC bonds or C—C bonds in other polybenzobisoxazoles, and so PTBO possesses the worst thermal resistance among all the polybenzobisoxazoles.The intrinsic viscosity of PBO, 4,4′-PDPEBO, 1,4-PNBO, 2,6-PNBO and PTBO decreased in turn, and the data were 25.40, 20.63, 16.76, 15.38, 14.63 dL/g, respectively.The main reasons are that linearity and symmetry of 1,4phenylene group, 4,4′(1,2diphynyl)ethylene group, 1,4-naphthalene group, 2,6-naphthalene group and 2,5-thiophene group decreased in turn, and the stereo-hindrance effect of these groups increased in turn.
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发布时间：2021-03-19 - 摘要：Cationic thermo-responsive microgels of P(NIPAM-co-DMC) were synthesized by copolymerizing mononers of N-isopropylacrylamide (NIPAM) and 2-methylacryloyloxyethyltrimethyl ammonium chloride (DMC) in the presence of a crosslinker N,N′-methylene-bis-acrylamide (MBA) by soap-free emusion polymerization.TEM observation indicates that the average diameter of copolymer microgels is about 200 nm.The lower critical solution temperature (LCST) of the prepared microgel is estimated to be about 34℃ by both DLS and 1H-NMR measurements.This cationic microgel was further used as a colloidal template for biomimetic mineralization of silica.The silica deposition was performed by simply stirring a mixture of aquous solution of microgel and TMOS at room temperature and neutral pH.The combination of FTIR, TEM, 1HNMR and TGA characterizations indicated that silica mainly deposited on the shell region of microgels.Moreover, we observed that hybrid nanoparticles with shringaged shape were formed when the silicification was performed at 40℃.
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发布时间：2021-03-19 - 摘要：It was observed that upon addition a certain amount of CuX (X = Cl/Br)/pentamethyldiethylenetriamire (PMDETA) in the presence of air, (N,Ndimethylamino)ethyl methacrylate (DMAEMA) can steadily undergo catalytic oxidative polymerization at ambient temperature.The results from gas chromatography (GC), nuclear magnetic resonnance spectroscopy (1H-NMR) and gel-permeation chromatography (GPC) showed that both the monomer conversion and the number-average molecular weight increased gradually with the reaction time; the asprepared PDMAEMA had a structure silimar with that prepared via conventional radical polymerization.A mechanism was proposed to rationalize the above findings.
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发布时间：2021-03-19 - 摘要：Polyaniline-coated conductive cotton textile (PANI/CCT) with superhydrophobic function was prepared via an in situ polymerization of aniline in the presence of trifluoroacetic acid (TFA) as the dopant and FeCl3 as the oxidant.The SEM results present that the PANI nano-particles with diameter of about 200 nm evenly spread over on the surface of cotton fabrics with diameter of 10~20 μm.The structure characterizations further indicate that the cotton cellulose has certain doping function to the PANI, and there is a stronger chemical combination formed between them in the process of in situ polymerization than that in common coating.The contact angle of the PANI/CCT prepared at ［TFA］/［ANI］ = 0.34 is found as high as 160.5°.It is proposed that the supper-hydrophobic function of the PANI/CCT results from synergetic effect of co-existence of micro/nanostructures with a low surface energy of TFA.Moreover, wettability of the PANI/CCT is reversibly varied from superhydrophobic to super-hydrophilic induced by a doping with TFA and dedoping with ammonia gas, exposing a promising property for preparing aciditycontrolled wettability switching.
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发布时间：2021-03-19 - 摘要：By using characteristics of carboxyl groups and azo chromophores,the pH sensitivity and thermo-optic properties of the side-chain azo polyelectrolytes were studied. A chromophore molecule containing azobenzene,4-(4′-nitrophenylazo)phenol was synthesized from 4-nitroaniline,sodium nitrite and phenol via diazo-coupling reaction. A side-chain azo polyelectrolyte was obtained from the chromophore molecule,epoxy chloropropane and αmethacrylic acid by free radical polymerization. The chemical structures of azo polyelectrolytes were characterized by FTIR,UV-Vis spectroscopy and 1HNMR. The thermal properties were characterized using differential scanning calorimetry (DSC),and the glass transition temperature (Tg) 189.8℃ showed that the azo polyelectrolyte had high thermal stability. Influences of different pH values on the UV-Vis absorption spectra of the azo polyelectrolyte were studied. The results showed that the UV-Vis absorption spectra of the azo polyelectrolyte changed with the pH value and the azo polyelectrolyte had high pH sensitivity. The measurements of refractive index (n) and thermooptic coefficient (dn/dT) of the azo polyelectrolyte were demonstrated at 650 nm and TM mode by using the attenuated total reflection (ATR) technique. The thermo-optic coefficient (dn/dT) was -1.92479×10-4℃-1,which was one order of magnitude larger than that of inorganic glasses such as zinc silicate glass (5.5×10-6℃-1),borosilicate glass (4.1×10-6℃-1) and was larger than the organic material such as polystyrene (1.23×10-4℃-1) and PMMA (1.20×10-4℃-1). These results indicate that the material may be provided to develop the new digital thermo-optic switch with low drive power.
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发布时间：2021-03-19 - 摘要：FTIR spectroscopy in combination with a diamond tipped attenuated total reflectance (ATR) immersion probe was utilized to study in situ coordination polymerization of butadiene (Bd) in hexane (HEX) with Neodymiumbased catalyst.The relationship of their intensity at signal bands of Bd and its concentration were investigated.The kinetic studies of polymerization of Bd were conducted by in situ ATR\|FTIR.The signal band at 1592 cm-1 was assigned to the stretching vibration of Bd, and the signal bands at 1010 cm-1 and 904 cm-1 were assigned to the deformation vibration of Bd.The Bd/HEX solution exhibited only the above three signal bands of Bd in the FTIR spectrum, and solvent interference was negligible when HEX spectrum was chosen as the background.All the intensity at the signal bands of 1592, 1010 and 904 cm-1 were found to be proportional to the Bd concentration in the range of 0.46～3.88 mol#12539;L-1.The stronger signal band at 904 cm-1 was chosen to monitor the Bd concentration during polymerization, and the Bd conversion was calculated on the basis of the linearity dependence of Bd concentration on the corresponding peak intensity at 904 cm-1.The agreement between the FTIR and conventional (gravimetric) kinetic data is excellent in all four sets of experiments.It is evident that signal band at 904 cm-1 can be used for the convenient realtime monitoring of Bd polymerization.The firstorder plots were linear at different polymerizations and thus polymerization rate was first order with respect to monomer concentration.The polymerization rate increased with increasing polymerization temperature, and the apparent propagation activation energy was determined to be 56.5 kJ#12539;moL-1.The GPC traces of polybutadiene products obtained at different polymerization temperatures exhibited relatively narrow unimodal molecular weight distribution,and polydispersity index (Mw/Mn) was around 2.5.The molecular weight of resultant polymers increased linearly with monomer conversion.The polybutadienes with high cis-1,4 configuration ranging from 98.0% to 99.2% and low vinyl configuration of around 0.4% could be prepared with Neodymium-based catalyst, leading to low Tg and some crystal line formation observed in DSC and POM analysis
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发布时间：2021-03-19 - 摘要：The base catalyzed hydrolysis reaction of poly(propylene carbonate) (PPC),a highly alternative copolymer synthesized from carbon dioxide and propylene oxide,was investigated systematically in this report.The influences of reaction time,concentration of PPC solution,concentration of base (sodium hydroxide) solution,and residual zinc oxide on the degradation reaction were discussed.1H-NMR spectra were used to analyze the carbonate unit content in the degraded polymer,it was found that the carbonate unit in the final degraded polymer maintained above 80% for all the studied conditions.The number average molecular weight of the final polymer dropped very quickly in the first several hours,a 50% decrease was observed in the first 2～6 h,depending on the concentration of PPC.The higher concentration of PPC was,the slower the decrease in molecular weight,when the concentration of PPC was 0.1 g/L,the number average molecular weight of the final polymer was 18500 after 8 h at 50℃,whereas it was 33700 when the PPC concentration was 0.5 g/L.Degradation time and base concentration were the two important factors for the yield as well as carbonate unit content in the degraded polymer,when the base concentration was 0.25 mol/L,the polymer yield maintained above 90% with carbonate unit over 80% at 48 h,the polymer yield dropped to ca.60% when the base concentration increased to 2.0 mol/L.Generally,prolonged degradation time caused yield loss in the final polymer,and the degradation reaction was enhanced with increasing base concentration.Compared with the purified PPC sample,the existence of zinc oxide in the as-polymerized PPC led to more severe degradation reaction.The GC-MS spectra were used to analyze the liquid compounds of the degraded products,where 1,2-isopropane-diol and propylene carbonate were detected, therefore, it was concluded that the random degradation reaction dominated in the base catalyzed degradation reaction at first stage,however,the unzipping degradation reaction became dominant with the degradation reaction proceeding,a preliminary mechanism for base catalyzed PPC degradation was proposed.Since the base catalyzed degradation can stably produce low molecular weight PPC under controlled conditions,this reaction was therefore considered as a new method to prepare low molecular weight PPC,with number average molecular weight adjustable from 4000 to 10000
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发布时间：2021-03-19 - 摘要：A series of vinyl biphenyl monomers containing chiral alkoxy terminals were synthesized and polymerized via conventional radical polymerization,atom transfer radical polymerization and anionic polymerizations.Optical polarimetry and circular dichroism spectroscopy were employed to characterize the chiroptical properties of model compounds,monomers and polymers.It was found that only the monomers with chiral alkoxy phenyl located at the ortho position of vinyl group were able to yield the polymers displaying a specific optical rotation ［α］25365 different obviously from their precursors and model compounds.These polymers also displayed cotton effects in the UVVis absorption region of biphenyl sidegroup,in a sharp contrast to the monomers,suggesting the formation of a chiral secondary structure of polymer backbone.For vinyl polymers,the most possible chiral structure was helical conformation of mainchain with an excess helix sense.Furthermore,the helical polymer containing chiral alkoxy group at metaposition,ie.P3M2St,showed an ［α］25365 value larger than that of monomer,while the helical polymer containing chiral alkoxy group at paraposition,ie.P4M2St,showed less intensive optical rotation than its monomer,indicating opposite helical sense of mainchain conformation.The reaction temperature and solvent were varied to study the effect of polymerization condition on the ［α］25365 value of polymers.It was found that the ［α］25365 value of polymers was independent on not only the polymerization condition employed but also the molecular weight of the polymer studied.The helical polymers obtained via anionic polymerization exhibited a larger difference in ［α］25365 from monomer than those resultant from radical polymerization,implying that the anionic polymerization had advantage of obtaining stereoregular structure.After removal of chiral alkoxy groups,the optically active helical polymers obtained showed optical rotations even larger than their precursor polymers although no stereogenic center was presented in the molecule,suggesting somewhat “memory effect”.
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发布时间：2021-03-19 - 摘要：Nylon 6 and its blends with a polyamide block copolymer were prepared by solvent blending and co-precipitation process.The samples were melted at 260℃ and then cooled at a rate of 30 K/min to obtain the controlled cooling samples (CCS).Investigations were carried out on the influence of thermal treatment on crystal melting behavior and crystal structure of nylon 6 and the blends by differential scanning calorimetry (DSC),wide-angle X-ray diffraction (WAXD) and polarized optical microscopy (POM).Measurements were taken after annealing at 190℃ with varied time from 0 h to 48 h.The results indicated that the existing of the polyamide block copolymer affected the crystal behavior and the crystal structure of nylon 6,comparing to those of pure nylon 6 under the same thermal conditions.The pure nylon 6 tends to form α crystals,but it in the blends forms γ crystals.It was also found that annealing treatment had different effects on these two kinds of samples.For Nylon 6,annealing treatment only promoted the transformation of nylon 6 from amorphous to crystal phase,improved the crystalline structure and increased the crystal degree greatly without crystal form change.The crystal degree increased by about 61% after annealing for 48 h.For the blends,annealing treatment not only promoted the transformation from amorphous to crystal phase,improved the γ form crystalline structure and increased the crystal degree,but also resulted in the formation new α crystals.Compared with the original sample,the crystal degree increased by about 84% after annealing for 48 h.
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发布时间：2021-03-19 - 摘要：Polyesteramide (PEA(x/y)) prepolymers with intrinsic viscosity from 0.24 dL/g to 0.52 dL/g were synthesized through melt condensation polymerization from adipic acid,butanediol and N,N′-bis(2-hydroxyethyl)terephthalamide (HETA) at different butanediol (x) to HETA (y) molar ratios.Chain extension reaction was performed with 2,2′-(1,4-phenylene)-bis(2-oxazoline) (PBOX) or adipoyl biscaprolactamate (ABC) alone,or with combined PBOX +ABC chain extenders.High molecular weight PEA with intrinsic viscosity of 1.05 and 0.73 dL/g was obtained when PEA(90/10) and PEA(80/20) prepolymers were chain extended.The PEA prepolymers and the chain extended PEA were characterized by FTIR and 1H-NMR spectroscopy,differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).1H-NMR spectra revealed that during the preparation of PEA prepolymers,esteramide exchange side reaction took place.DSC studies indicated that after chain extension,the Tg of PEA(80/20) increased,and its ΔHm as well as Tm decreased.PEA(0/100) is a non-crystallizable polyesteramide,and its Tg is 65℃.TGA studies showed that as the content of HETA used in the synthesis of PEA(x/y) prepolymers increased,the thermal stability of the prepolymers decreased,because the introduced terephthalic diesterdiamide showed less stability
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发布时间：2021-03-19
Research Article
- 摘要：Polyamine chelating fiber was synthesized by chemical modification,with the raw material of polyacrylonitrile fiber.The chemical structure and active function groups were characterized by IR.From IR spectrogram,it was found that the nitrile group was almost completely disappeared and the new —N—CN characteristic absorption band was appeared at 1644 cm-1.These results proved that polyamine chelating fiber was successfully synthesized,and the fiber has structural characteristics of N,N coordinative functional group——amidino and polyamine group,it can also be confirmed by the changes of bending vibration bands of —NH2 group and —NH group respectively near 1600 cm-1 and 1580 cm-1.Thermal stability was characterized by differential scanning calorimetry (DSC) and the change of thermal stability was analyzed.After amination reaction,the structure of the fiber was changed and heat stability of the fiber was relatively decreased.The micro configuration of fibers was characterized by SEM,the relationship between the micro configuration and adsorbability was explained.Mechanical capability of fibers was studied by mechanical strength and diameter measurements,and the influencing factors for preparing high intensity fiber was analyzed.Based on titration curve and exchange content,the chemical stability and quality of selfmade chelating fiber were analyzed.The results indicate that the selfmade polyamine chelating fiber exhibits finer mechanical capability and chemical stability,having furrow and cellular structure in its surface and cross section.The average exchange capacity is 10 mmol#12539;g-1 and the fiber can be well used in the pH range of 2.0～8.0.
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发布时间：2021-03-19 - 摘要：Both solubility tests and reference data proved that commercially available soy protein isolate (SPI) had low solubility in pure water.As an alternative,guanidine hydroxyl chloride (GuHCl) and dithiothreitol (DTT) were used to treat SPI during the dissolution process.After dialysis of GuHCl and DTT,an SPI aqueous solution was obtained.Solubility tests showed this SPI aqueous solution had a relatively high concentration (6 times larger as that directly dissolved in pure water),and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) showed that such an SPI solution did not suffer the degradation of the protein subunits.In addition,through a simple treatment of GuHCl and dialysis process,a 7S-rich solution and an 11S-rich sediment were obtained,so that the two major components of SPI were primarily separated.SDS-PAGE gave the major evidence of the separation,and the possible mechanism of the separation was discussed.It was a relative simple method with high productivity,though the separation efficiency was lower than that of the chromatography method.The paper provides new insights into the role of disulfide bonds that play in stabilizing the structure of SPI,especially that of the component 11S
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发布时间：2021-03-19
Research Bulletin
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