JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Ao Ji,Xingqi Luo,Xinguo Yang
Multiple factors stimulate human beings in their daily lives, but uniformly collecting these signals is challenging. This study proposes a physically cross-linked method that employs hydrogen bonding interactions to prepare poly(vinyl alcohol)/perylene imide (PVA/PI) hydrogels. The prepared PVA/PI hydrogels demonstrate favorable compressive strength (45–75 kPa) and adhesion properties. At room temperature, elongation reaches approximately 400%. Additionally, the PVA/PI hydrogels exhibit strong mechanical properties, with a maximum elongation of 200%, and high ionic-electronic conductivity of 29.6 S m −1 , even after being soaked in a 2 M HCl solution for 24 h. The water-soluble PI in the PVA/PI hydrogels is environmentally responsive, resulting in a current response time of 100 ms under 365 nm irradiation, as well as reversible fluorescence changes across different pH levels. Both the PVA5/PI1 and PVA5/PI1/HCl2 (the concentrations were 5 wt%, 1 mg mL −1 and 2 mol L −1 , respectively) hydrogels demonstrate high sensitivity (0.49 and 7.88 kPa −1 ) and a wide pressure monitoring range (0.088–30.67 kPa and 0.088–18.67 kPa, respectively) as pressure sensors. The first developed recyclable PVA/PI hydrogel shows promise for use in wearable sensing devices and is expected to be applied in complex environments.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·
IF 2.7
Kaifeng Gu,Jianyu Wang,Chuanjie Fang,Liping Zhu
Nanofiltration (NF) membranes play a huge role in industrial manufacturing with their unique selective permeability. Membrane material and structure are the main factors affecting the effectiveness of NF separation. Typically, NF membranes are produced by interfacial polymerization (IP). Therefore, control of the IP process is particularly important. This work provides a NF membrane preparation process by combining internal modulation of the separation layer and surface modification. The diffusion of polyethyleneimine (PEI) molecules is accelerated by the introduction of ethanol and cetyltrimethylammonium bromide into the PEI aqueous phase solution, resulting in the formation of a loose interior. In addition, the high selectivity is maintained by high molecular weight PEI modifying. After optimizing the process, the NF membrane permeate flux and selectivity can be increased compared to the blank group (MgCl 2 desalination from 90% to 97%, permeate flux from 17 to 35 L m −2 h −1 ). The resulting PEI/TMC NF membranes also show excellent separation properties in mixed salt applications for magnesium-lithium separation.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 124
·期 5
·3633-3640
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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
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2010
·Vol. 117
·期 1
·235-242
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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
·
2024
·Vol. 142
·期 2
·e56342
·
IF 2.7
Dongchen Chen,Yan Li,Jinzhe Li,Yaru Wang,Hao Ye,Mengyao Zhao,Wanjing Li,Bin Yang,Xianglong Li
To solve the problem of cytotoxicity for most antimicrobial agents loaded in packaging materials, we developed a novel bi-layer fibrous membrane by using centrifugal spinning, which of the outer layer was submicron native potato starch/polyvinyl alcohol (ST/PVA) composite fibers loaded with ZnO nanoparticles (ZnO NPs) for providing high antibacterial activity. The inner layer was nano-based calcium alginate/polyethylene oxide (CA/PEO) fiber for providing excellent biocompatibility. The addition of ZnO caused the semicrystalline structures of ST/PVA fibers, while the CA/PEO fibers were shown semicrystalline structures due to the PEO. Fourier transform infrared indicated that posttreatment had not effect on the structures of ST/PVA/ZnO fiber, but the structure of CA/PEO fibers were affected by interaction between COO groups of alginate and Ca 2+ ions. The results of mechanical property demonstrated that CA/PEO fibers showed highest stress of 3.83 ± 0.25 MPa and helpful for improving the stress of bi-layer fibrous membrane. The obtained fibrous membrane had excellent antibacterial property with diameters of bacteriostatic zone against E. coli and S. aureus of 20.5 and 21.5 mm, respectively. On this basis, the shelf life of strawberry was improved up to 6th day by inhibit the growth of microorganisms, which indicated that the obtained fibrous membrane showed great potential for food packaging.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2011
·Vol. 122
·期 4
·2449-2455
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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
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2024
·
IF 2.7
Tongwei Zhang,Huijie Qin,Lihong Bao,Mingkao Xu,Bo Dang,Jianxi Li
Two-dimensional molybdenum disulfide (MoS 2 ) nanosheets are seen as highly promising nanofillers for enhancing polymer properties, yet there is a need for methods that are low-cost, simple, and environmentally friendly to facilitate the large-scale production of MoS 2 nanosheets. Furthermore, it is necessary to functionalize the MoS 2 surface to ensure good interfacial compatibility with the polymer matrix. In this study, MoS 2 @Ag@PA hybrids were created by generating silver nanoparticles directly on the surface of MoS 2 via radiation, followed by encapsulation on the surface of MoS 2 @Ag through the chelating properties of phytic acid. It is significant to note that, due to the excellent lubrication and physical cross-linking effects of the MoS 2 @Ag@PA hybrids, adding one part of MoS 2 @Ag@PA hybrids can enhance the melt flow rate and elongation at break of the ethylene vinyl acetate copolymer (EVA)/MH composites by 140% and 17.3%, respectively. The simultaneous addition of one part of MoS 2 @Ag@PA hybrids decreased the peak heat release rate, total heat release, and total smoke release of the EVA composites by 48.7%, 42.7%, and 41.2%, respectively. Moreover, the toxic gasses (e.g., CO) generated by burning EVA composites were significantly reduced compared to pure EVA, indicating improved fire safety. This research not only provides significant opportunities for the green mass production of MoS 2 nanosheets but also expands their potential applications in high-performance nanocomposites.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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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
·
2024
·Vol. 141
·期 28
·e55626
·
IF 2.7
Xiao Li,ChongXiao Yuan,Guoqi Gao,Hengqing Zhou,Nannan Zhang,Xinyue Yang,Xiaofang Liu,Huajun Sun
The demand for self-powered sensing technology and energy harvesting system necessitates high-performance and flexible piezoelectric materials. This paper presents a novel approach utilizing coaxial electrospinning to fabricate all-organic PVDF/PMMA piezoelectric fiber films with a shell–core structure. The resulting fiber films, cut into 2 × 2 cm 2 square pieces and hot-pressed every three pieces, demonstrate enhanced piezoelectric properties while retaining high flexibility. The interaction between the CO bonds in the PMMA polymer and the CH 2 in PVDF promotes the arrangement of F atoms in PVDF, enhancing the content of the piezoelectric active phase. Additionally, the coaxial electrospinning process fosters vertically oriented hydrogen bonds between PVDF and PMMA, augmenting cross-linking and improving mechanical properties. Notably, when the PVDF to PMMA layer volume ratio is 5:1, the piezoelectric coefficient (| d 33 |) of the composite fiber film exhibits a significant 60% increase from 10 pC N −1 in neat PVDF to 16 pC N −1 . This research holds substantial promise for applications in self-powered sensing and energy harvesting piezoelectric materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2012
·Vol. 125
·期 4
·2489-2493
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IF 1.289
Zhen Yao,Li-wu Zhou,Bin-bin Dai,Kun Cao
Copolymer of dicyclopentadiene and cyclopentene (CPE) is synthesized through ring-opening metathesis polymerization using the second-generation Grubbs catalyst. The influences of monomer composition, catalyst concentration, and reaction temperature on gelification time and monomer conversion have been investigated. Furthermore, the reaction injection molding process is employed to produce the copolymer of dicyclopentadiene and CPE. It has been found that postcuring process is necessary to achieve 100% monomer conversion. The incorporation of a small amount of CPE into the copolymers can reduce the weight loss rate in the TGA process and improve the mechanical properties. The effects of CPE fraction, catalyst concentration, and postcuring temperature on thermal stability and mechanical properties are discussed. © 2012 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 6
·3225-3233
·
IF 1.24
Xiaofeng Wang,Jianqiang Hu,Ting Hu,Yanyun Zhang,Yiwang Chen,Weihua Zhou,Shuqin Xiao,Xiaohui He
The poly(butoxymethylenenorbornene- co -norbornenemethyl acetate) (PBN/NA) were successfully synthesized via the vinyl addition copolymerization of 2-butoxymethylene norbornene (BN) and norbornene-2-methyl acetate (NA). The poly(butoxymethylenenorbornene- co -norbornenemethanol) (PBN/NOH) was obtained by the de-esterification of PBN/NA. After doping with 4,5-imidazole dicarboxylic acid (IDA) and phosphoric acid (H 3 PO 4 ), the proton exchange membranes with crosslinked structure were obtained and the corresponding morphology, water uptake, proton conductivity, methanol permeability, thermal stability, as well as tensile properties were investigated. The results indicate that the crosslinked membranes showed higher proton conductivity at higher temperatures and lower methanol permeability after incorporation of more content of IDA and H 3 PO 4 . The PNIH membranes showed lower tensile strength, elongation at break as well as the elastic modulus than pristine PBN/NOH. © 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
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