JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yuying Cui,Lulu Wang,Yang Zhang,Shuang Li,Fan Zhang,Jilin Wang
Developing novel anion-exchange membranes (AEMs) that feature superior hydroxide conductivity and excellent alkaline stability poses a major challenge. Among different kinds, cross-linked AEMs enjoy the highest popularity, thanks to their uncomplicated fabrication procedures and outstanding stability. However, it is noteworthy that in the majority of instances, the employment of covalent cross-linking methods often plunges AEMs into a conductivity-stability conundrum. That is to say, when efforts are made to boost the conductivity, the stability tends to be compromised, and conversely, attempts to enhance stability might adversely affect conductivity. To tackle the conductivity-stability issue faced by conventional covalent cross-linked AEMs, within this research, innovative bifunctional imidazole cross-linking agents that carry imidazole cations were synthesized using N-(3-aminopropyl)-imidazole and 3-chloropropylamine. Following that, these agents were then utilized to manufacture high-performance cross-linked quaternized chitosan (QCS) membranes. The bifunctional cross-linker was able to furnish an ionic 3-D network, further promoting the formation of microphase separation morphology and a densely cross-linked structure, thereby bringing about both excellent conductivity and alkaline stability. The as-prepared QCS-MI 0.3 AEM exhibited a relatively low swelling ratio of 29.7% at 80°C, along with outstanding conductivity reaching 128.83 mS cm −1 at the same temperature. Moreover, it demonstrated remarkable alkaline stability, with 92% of its conductivity retained after being immersed in 6 M KOH at 80°C for 168 h. Meanwhile, the single cell built upon the QCS-MI 0.3 AEM likewise showcased remarkable fuel cell performance, achieving a power output of 518.08 mW cm −2 at 80°C, and exhibited excellent durability as well. This research effort devised a novel approach for synthesizing high-performance cross-linked AEMs, which further augmented the application potential of QCS-based AEMs in the realm of fuel cells.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Caixia Zhao,Sheng Yang,Tian Fu,Wang Qin,Yaqi Yang,Guoxiang Zou
In order to compare the effect of the monophenyl ring terephthalic acid (TPA) and biphenyl rings 4,4′-oxybisbenzoic acid (OBBA) with ether bond on poly(butylene adipate) (PBA)-based copolyesters properties, two copolyester series poly(butylene adipate- co -butylene terephthalate)s (PBATs) and poly(butylene adipate- co -butylene oxybisbenzoate)s (PBAOs) were synthesized, and comparatively investigated. All the synthesized copolyesters had satisfactory number-average molecular weights in the range of 26,500–73,000 g/mol. For PBATs copolyesters, the crystalline structure gradually transitioned from the monoclinic crystal structure of poly(butylene adipate) to poly(butylene terephthalate) (PBT) with increasing TPA because of the crystalline segments transformation from butylene adipate to butylene terephthalate, while PBAO copolyesters progressively shifted from the crystalline structure of PBA to the amorphous structure of poly(butylene oxybisbenzoate) (PBO) as increasing content of OBBA. The incorporation of either TPA or OBBA comonomers with rigid cyclic structure into PBA chain noticeably increased the glass transition temperature ( T g ). With the same monomer molar ratio, PBAOs because of incorporation of the bicyclic comonomers presented higher T g (range from −24.2 to 49.5°C) than that of PBATs (range from −56.5 to 22.4°C). It was found that copolyesters with bicyclic and ether bond OBBA comonomers exhibited a better flexibility in property than that with monocyclic TPA comonomers.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 124
·期 5
·3633-3640
·
IF 1.24
Shixin Liu,Man Jiang,Sai Ye,Xiaohong Xu,Ping Lu,Jian Dong
This study reports properties of a class of biodegradable polyesters based on citric acid and glycerin, both of which are safe ingredients in food, and their usefulness for drug control release applications. Transparent thin films of poly(glycerin citrate) (PGC) prepared by condensation polymerization were characterized by dynamic mechanical analysis, tensile testing, and FTIR spectroscopy. Depending on the acid-to-glycerin molar ratios, the crosslinked films could have glass transition temperatures varying from 30 to 81°C as shown by dynamic mechanical analysis. The ductile PGC films were more prone to hydrolytic degradation than poly(lactic acid). The controlled release properties of the PGC films were evaluated by a permeation study of an exemplary drug theophylline. The diffusion of theophylline in PGC film follows a Super Case II mechanism, but in PGC film modified with PEG4000, the diffusion follows approximately a Case II mechanism (near zero-order release mechanism). © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2010
·Vol. 117
·期 1
·235-242
·
IF 1.203
Hongtao Liu,Weilin Xu,Sanping Zhao,Jingjing Huang,Hongjun Yang,Yunli Wang,Chenxi Ouyang
Biomedical polyurethane (PU) and silk fibroin have similar molecular architecture in their primary and aggregate structure, both of which have imido bonds and microphase separation, and they have been employed as scaffold materials for biomedical applications. As the featured peptide sequence of silkworm silk protein, GlyAlaGlyAla (GAGA) tetrapeptide was synthesized by using traditional liquid-phase peptide synthesis method with Boc-protected alanine and glycine as starting materials, and was transformed to its derivative with two end-amido groups. The derivative was incorporated into the backbone of the classical synthetic copolyurethane as a chain extender to form a silk-inspired polyurethane. Elemental analysis showed the nitrogen content in the silk-inspired PU was higher than that in the butanediol-extended PU but lower than the theoretical value, indicating the chain extender containing GAGA was partially incorporated into the PU chain. The results from 1 H-nuclear magnetic resonance, Fourier transform infrared spectra, Raman scattering spectra and pyrolysis-gas chromatography/mass spectrometry qualitatively identified the primary structure of the silk-inspired polyurethane. This concept and strategy may allow the fabrication of a new class of thermoplastic polyurethane elastomer to mimic the structure and properties of silk fibers if in fiber form, which combines traditional synthetic polymer chains with peptide sequences. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Qiuyi Li,Fan Li,Yuanfeng Pan,Pingxiong Cai
The antioxidant composite film was prepared by blending the pericarp extract of the Chinese litchi variety “Nuomici” (NLPE) with chitosan (CS). The study examined the impact of various NLPE concentrations (0%, 2%, 5%, 10%, and 15% [w/v]) on the mechanical properties, water vapor barrier, UV–visible light barrier, and antioxidant properties of the CS film. The results indicated that the composite films displayed superior antioxidant and UV-barrier properties, accompanied by lower water vapor permeability coefficients, water content, elongation at break, and tensile strength, compared to the pure CS film. Fourier-transform infrared (FTIR) spectroscopy, SEM, and x-ray diffraction were employed to analyze the hydrogen bonding between CS and NLPE, revealing their excellent compatibility. Furthermore, fruit preservation studies demonstrated that CS composite film containing 5% (w/v) NLPE retarded weight loss and shrinkage of green grapes more effectively than both the pure CS film and the control group without film packaging. Therefore, CS/NLPE film holds significant potential and value for practical applications in food packaging, while also offering a novel approach for the reuse of waste resources and sustainable packaging.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 124
·期 6
·4915-4919
·
IF 1.24
Nianjun Kang,Zhongjie Du,Hangquan Li,Chen Zhang
Polymethyl(3-glycidyloxypropyl)siloxane (PMGS) was synthesized as a flame-retardant additive, which were cocured with diglycidyl ether of bisphenol-A (DGEBA) using 4,4′-diaminodiphenylsulfone as a curing agent. The structure of PMGS was confirmed through Fourier transform infrared and 1 H-NMR spectra. The cured products were characterized with dynamic mechanical thermal analysis, thermogravimetric analysis, and oxygen index analyzer. With PMGS incorporated, the cured epoxy resin showed better thermal stability, higher limited oxygen index, and higher char yield. At moderate loading of PMGS, the storage modulus and glass transition temperature of the cured epoxy resin based on neat DGEBA were obviously improved. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 5
·2706-2714
·
IF 1.24
Guang Zhu,Jingkun Xu,Ruirui Yue,Baoyang Lu,Jian Hou
Relatively scant work was related to polynaphthalene (PN) and its derivatives because of the unique nonlinear optical properties which make PN and its derivatives owning potential applications in various domains. According to relevant studies, the pursuit for the synthesis of high quality PN films is a great challenge for the applications of PN. To achieve high quality polymer films, three bridged naphthalene derivatives were designed, and finally two crosslinked PN exhibiting space network were electrosynthesized, respectively, by direct anodic oxidation from 1,6-bis(naphthalen-2-yloxy)hexane and 1,4-bis((naphthalen-2-yloxy)methyl)benzene in mixed electrolyte of dichloromethane containing boron trifluoride diethyl etherate. Furthermore, as-formed conducting films were characterized by cyclic voltammetry, spectroscopic analysis, thermal analysis, and scanning electron microscopy. And the series of characterizations indicated that films hold high stability and good blue-light-emitting property. Meanwhile, these polymer films were smooth, shiny, and flexible easily being processed into various shapes by conventional mechanical methods. Consequently, these high quality PN films will facilitate their potential applications as blue-light-emitting materials in organic light-emitting diode. Because di(naphthalen-2-yl) terephthalate was difficult to electropolymerize, the effects of bridged spacers to polymerization were also discussed. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 5
·2906-2910
·
IF 1.24
Fang Wang,Junjun Liu,Yanni Li,Yabin Wang
Electropolymerization nanofilm was prepared by cyclic voltammogram with 6 N , N -diallylamino-1,3,5-triazine-2,4-dithiol monosodium (DAN) on the AA5052 surface in 0.15 M NaNO 2 at 10°C, then octyl-triethoxysilane (OTES) film was fabricated on the poly(6 N , N -diallylamino-1,3,5-triazine-2,4-dithiol) nanofilm (PDA) covered AA5052 surface by self-assembling method to obtain the composite polymeric nanofilm (C-PDA/OTES). The composite polymeric nanofilm was characterized by means of FTIR spectra, scanning electron microscope (SEM), contact angle, and potentiodynamic polarization. The results showed that the C-PDA/OTES covered surface was more homogenous, compact, hydrophobic compared with PDA covered surface and had excellent protection efficiency. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 122
·期 4
·2449-2455
·
IF 1.24
Chengshuang Wang,Xiaoyu Chen,Jiangqiang Chen,Chengguo Liu,Hongfeng Xie,Rongshi Cheng
Novel polyurethane acrylates (PUAs) were prepared by the reaction of soy polyols with isophorone diisocyanate and hydroxyethylacrylate. FTIR results confirmed the formation of PUAs from different kinds of soy polyols. The glass transition, damping properties, thermal stabilities, and mechanical properties of PUAs were characterized by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and universal test machine. The morphology of PUAs was investigated by scanning electron microscope (SEM). The results of the swelling experiments showed that the crosslinking density of polyurethanes and PUAs directly correlated with the hydroxyl (OH) number of polyols. The DSC and DMA results displayed that the glass transition temperature of PUAs was higher than that of polyurethanes and increased with OH number. Furthermore, the formation of PUA networks improved the damping properties of polyurethanes. TGA results demonstrated the acrylation of polyurethanes improved its thermal stability. The initial decomposition temperature of polyurethanes and PUAs also increased with OH number. When compared with polyurethanes, the tensile strengths of PUAs were improved by 118%, 39%, and 9%, respectively, with the increase of OH number of three soy polyols. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 121
·期 6
·3710-3716
·
IF 1.24
Caiyu Peng,Yuying Zhang,Weijun Tong,Changyou Gao
The microcapsules in drug delivery systems can prevent degradation of drugs and help to control the release rate. To enhance the targeted delivery effect of the microcapsules to cancer cells, some specific ligands such as folic acid (FA) are necessarily further conjugated. Herein, covalent poly(allylamine hydrochloride) (PAH) multilayers were fabricated on CaCO 3 microparticles under the cross-linking of glutaraldehyde, which were further immobilized with different amount of FA molecules via the spacer of diamino terminated poly(ethylene glycol) (PEG). As a comparison study, four types of microcapsules, i.e., the PAH capsules, the PAH capsules grafted with PEG, and the PAH capsules conjugated with two different amount of FA via the PEG spacer were prepared. Their chemical and physical structures were confirmed by infrared spectroscopy, UV–vis spectroscopy and scanning electron microscopy. In vitro cell culture found that the cellular uptake of the PAH capsules grafted with PEG was reduced significantly compared with that of the pure PAH capsules. The FA-modified microcapsules could be selectively delivered into HepG2 tumor cells which overexpress FA receptors but not into the endothelial cells. The number of HepG2 cells which ingested the FA-conjugated capsules showed a positive correlation with FA amount. The results indicate that these FA conjugated capsules have a high selectivity to be delivered to tumor cells, endowing them with a larger opportunity functioning as targeted delivery vehicle for anticancer drugs. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2010
·Vol. 118
·期 2
·678-684
·
IF 1.203
Xufei Liu,Jie Zhou,Changbao Chen
Using tribenuron-methyl as a template and N , O -bismethacryloyl ethanolamine as a functional crosslinking monomer, a molecularly imprinted nanowire membrane was prepared over an anodic alumina oxide membrane. The nanowire fabric of the imprinted membrane was established with a scanning electron microscope and a transmission electron microscope. However, the nonimprinted particulate membrane is formed in the absence of a template. Scatchard analysis showed that an equal class of binding sites were formed in the imprinted nanowire membrane and the dissociation constant and the maximum number of these binding sites were estimated to be 1.44 × 10 −5 M and 22.7 µmol/g, respectively. The permeation experiments throughout the imprinted membrane and the nonimprinted one were carried out in a solution containing the template and its competitive analogs. These results demonstrated that the molecularly imprinted nanowire membrane exhibited higher transport selectivity for the template tribenuron-methyl than its analogs, chlorimuron-ethyl, thifensulfuron-methyl and N -(4-bromophenylcarbamoyl)-5-chloro-1H-benzo[d]imidazole-2-carboxamide. But the nonimprinted granular membrane had no permselectivity for the four substrates. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55701
·
IF 2.7
Chaojie Chen,Guoqing Cui,Yuanlong Li,Li Liu,Guangfeng Wu
Developing antiswelling hydrogel that retains their low modulus and has three-dimensional (3D) printability to application in the biomedical field is a current critical issue. Here, we synthesized 3D printing ink consist of poly(acrylic acid-acrylamide-allyloxypolyethyleneglycol) (P(AA-Am-APEG)) and nanosilica (SiO 2 ) by free radical polymerization, immersed the hydrogel precursor printed by ink in ferric chloride solution to prepare a low modulus, antiswelling, and conductive hydrogel. In the physical cross-linking network, the coordination interaction and hydrogen bonds contributed to excellent mechanical properties and nSiO 2 regulated rheological behavior of ink. Especially, P(AA-Am-APEG) molecular chain was a structure containing of APEG branch chain, which could endow antiswelling (the equilibrium swelling rate was only 7% in deionized water) and low modulus (Young's modulus was less than 100 kPa) to hydrogel. The tensile stress could still maintain 90% of the original value after soaking for 24 h. In addition, the existence of iron and chloride ions provided high sensitive deformation-dependent conductivity to hydrogel. Therefore, the strategy of controlling the swelling and modulus by branch chains would expand the application of hydrogel in biosensors and other fields.
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高影响因子
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