JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 16
·
IF 1.768
Yu Sun,Junhui Zhou,Qiang Cheng,Daoshu Lin,Qian Jiang,Anjie Dong,Zicai Liang,Liandong Deng
Graphene oxide (GO)-based nanohybrids were designed for small interfering RNA (siRNA) delivery for their high water dispensability, good biocompatibility, easily tunable surface functionalization, and particular optical properties. In this study, novel nanohybrids based on GO were fabricated. Methoxypoly(ethylene glycol) (mPEG) was covalently conjugated to GO via amide bonds. Then, poly(2-dimethyl aminoethyl methacrylate) (PDMAEMA), which was synthesized via reversible addition–fragmentation chain transfer polymerization (RAFT) with 2-(dodecyl thiocarbonothioyl thio)-2-methyl propionic acid (DTM) as the RAFT agent, was attached onto GO via physical interaction between DTM and GO. Compared with Lipofectamine 2000, the novel mPEG–GO/PDMAEMA nanohybrids showed comparable gene transfection efficiency and a low cytotoxicity. Moreover, the mPEG–GO/PDMAEMA nanohybrids showed enhanced optical properties compared to the original GO because of the presence of mPEG and PDMAEMA. Our work encouraged further exploration of the novel nanovector for combined photothermal and siRNA delivery. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43303.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 21
·47482
·
IF 2.188
Dandan Bao,Yuntao Xie,Shenglin Ma,Zhibing Wu,Ji-Gang Piao
Lignin is considered one of the main biorenewable polymers from natural resources. Each year, a large amount of lignin is generated as a waste byproduct of the pulping process in the paper industry. However, it is seldom treated as a value-added material because of its undefined structure, the diverse methods of isolation and processing, and the origin of the material; these greatly hinder its application. Therefore, it is of great significance to explore new potential applications of this readily available yet underappreciated natural product. In this study, we developed a preparation method of lignin-based microstructures or nanostructures via self-assembly. We created various self-assembled nanostructures, including nanocubes, nanorods, nano-octahedrons, nanobranches, and other morphologies, by choosing different types of simple inorganic acids at various pHs. Some of these nanostructures have never been reported. These structures were fully characterized with scanning electron microscopy, ultraviolet–visible spectroscopy, and dynamic light scattering. All of them were uniform and stable. They displayed little or no cytotoxicity to cells in vitro at concentrations up to 1024 μg/mL. We hope the results of this study provide some insight for the future development of new applications of lignin-based materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47482.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 30
·
IF 1.866
Wei Gong,Meilan Li,Yunxiao Zang,Hao Xie,Bailing Liu,Hualin Chen
In order to control the impacts of blown sand in salty desert, in this article, the amphoteric emulsion, for the first time, was applied as an ecological sand-fixing material. This study started from the synthesis of the poly{vinyl acetate-dibutyl maleate-acrylamide-co-3-[ N -(2-methacroyloylethyl)- N, N -dimethylammonio]-propane sulfonate} [P(VAc-DBM-AM-DMAPS)] copolymer emulsion. Then, the structures, composition, thermal property of the emulsion were characterized by 1 H-NMR, FTIR, and DSC, respectively. The basic properties of the emulsion and salt tolerance of the latex films were measured by using viscometer, dynamic light scattering, and laser Doppler electrophoresis also. And the sand-fixing properties of the emulsion were evaluated. Finally, the influence of the emulsion on the growth of soil microbe and plants were discussed for understanding its ecological effect. The experimental results showed that the emulsion has been successfully synthesized and could be as an ecological sand-fixing material. The related reason is that, first, the emulsion could significantly improve the compressive strength and water retaining; second, the emulsion had good thermal aging, freeze-thaw stabilities and salt tolerance to withstand the changes in temperature and NaCl concentration of salty desert; third, the influence of the emulsion on the growth of plants and microbe of sand also showed a dependable ecological effect. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43715.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 29
·48876
·
IF 2.188
Lirui Shen,Honghong Bu,Huan Yang,Songcheng Xu,Guoying Li
Collagen self-assembly and simultaneous mineralization by incubating a mixture containing collagen, calcium, and phosphate ions under physiological conditions, is an effective method to prepare bone-like biomimetic materials. The formation of fibrils and minerals is related to pH of system. In the present work, we evaluated the effect of pH (7.9–10.4) on biomineralization process and synthesized composites. Turbidity kinetics and X-ray diffraction (XRD) measurements revealed that increasing pH delayed the crystallization process from nucleation phase to plateau phase because of promoting chelation of Ca 2+ with collagen. Typical peaks of phosphate in Fourier transform infrared spectroscopy coupling with characteristic peaks of hydroxyapatite (HAp) in XRD spectra illustrated the formation of HAp after biomineralization. Scanning electron microscopy measurements indicated that the increase of pH promoted the deposition of spherical minerals in fibrils. Especially, the minerals tended to form cluster-like structure at pH 10.4. The hyp content, Ca and P contents, and gel strength measurements suggested that higher pH promoted the formation of HAp with a Ca/P closed to 1.67 and the prolongation of crystallization gave the time for collagen self-assembly leading to the increase of gel strength at higher pH (9.4–10.4). These results might provide some new ideas for designing biomimetic materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48876.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 3
·46979
·
IF 1.901
Yuanbo Cai,Wu Yan,Xuesong Peng,Mei Liang,Lin Yu,Huawei Zou
In this work, the acrylonitrile (AN)-styrene (St)-divinylbenzene (DVB) resin was synthesized via suspension polymerization in the presence of inert porogens as diluent. The relationship of the solubility parameter (SP) of the materials and the porous properties of the resin was investigated. These porous spherical resin particles (0.25–0.84 mm) can be used as precursors of amidoxime resin which has a high metal ion chelating efficiency. The results showed that the porous properties (surface area and mean pore width) of the resin changed with variation in the compatibility between monomers and porogens. According to the the BET theory to N 2 sorption and scanning electron microscopy (SEM), the specific surface area of the obtained beads was strongly dependent on the compatibility of the components of the system and achieved values from 3.3 to 66.8 m 2 /g. The surface area of the terpolymer beads was found to rise with a decrease in the content of acrylonitrile or an increase in the SP of the porogens. However, the variation of the pore size was just the opposite. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46979.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 7
·e53479
·
IF 3.057
Qi Zhu,Zhijun Wang,Ziheng Xu,Yihan Wang,Qinjian Yin,Kun Zhang
Pyrolysis of mussel-inspired polydopamine (PDA) can yield carbon material with high electrical conductivity and n-type semiconductor performance. Investigating the relationship between the structure and the thermoelectric properties of carbonized PDA (cPDA) is therefore highly desired. In this work, a series of cPDA annealed at 800°C has been successfully prepared by adjusting the concentration of dopamine (DA) monomers, which had a significant effect on the shape and size of cPDA nanoparticles and their thermoelectric properties. Structural analyses indicate that cPDA are mainly amorphous with some graphite like structure and short-range ordering. The electrical conductivity and Seebeck coefficient show different trends with the concentration of DA monomers. The largest room-temperature power factor of 26.15 μW m −1 K −2 was obtained on cPDA when the concentration of DA was 13.12 mM with a conductivity of 28,493 S m −1 and a Seebeck coefficient of −9.58 μV K −1 .
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 34
·e52803
·
IF 3.057
Wei Zhang,Qingyin Wang,Gongying Wang,Shaoying Liu
The block copolymers PEF/PBAT were synthesized by copolymerizing ethylene 2,5-furandicarboxylate (EF) with totally biodegradable poly (butylene adipate-co-terephthalate) (PBAT). The copolymers' molecular chain structure, thermal properties, thermal stability, and mechanical properties were investigated, and the toughening mechanism was preliminarily studied via the micromorphology. The results revealed that the prepared block copolymers were amorphous, the thermal stability of PEF was improved, while the glass transition temperature decreased with the increase of PBAT content. PBAT was enhancing the tensile strength and elongation at break of PEF simultaneously. When the PBAT content was 25% (PEF/PBAT-25), the brittle-ductile transition occurred, with the tensile strength, Young's modulus and elongation at break of 72 MPa, 3210 MPa and 287%, respectively. The copolymers have broad application in the field of packaging materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 6
·47051
·
IF 1.901
Yongjun Guo,Rutong Song,Rusen Feng,Gang Dai,Yan Liang,Di Pu,Xinmin Zhang,Zhongbin Ye
A thermoresponsive graft copolymer was synthesized through free radical copolymerization and a “graft onto” method in aqueous solution. The primary structure of the graft copolymer is constituted of a partially hydrolyzed polyacrylamide (HPAM) backbone and thermosensitive side chains [amino-terminated poly( N , N -dimethylacrylamide- co -diacetone acrylamide) or P(DMA- co -DAAM)] with molecular weight around 10 5 g/mol. The 1 H-NMR spectra at various temperatures showed the temperature of thermoassociation ( T ass ) in the copolymer. At the same time, the pyrene fluorescence measurements demonstrated the formation of hydrophobic microdomains of P(DMA- co -DAAM) above T ass . The thermothickening behavior of the graft copolymers was studied by viscosity measurements, and the results suggested that in semidilute solutions, the T ass and the magnitude of thermothickening could be regulated by varying the hydrolysis degree of the backbone, the composition of side chains, and the addition of NaCl. The oscillatory shear experiments demonstrated that the copolymer can present a remarkable elasticity increase as the temerature increased to T ass . These thermoassociating copolymers with temperature-tunable properties can have potential applications as smart materials in enhanced oil recovery. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 135 , 47051.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52737
·
IF 3.057
Jianming He,Shaoying Liu,Dongliang Chen,Gongying Wang,Qingyin Wang
Melamine formaldehyde fiber is widely used in various fields because of its excellent heat resistance and flame-retardant properties. In this study, melamine and paraformaldehyde are used as the main raw materials, 2,2′-bis(trifluoromethyl)benzidine (TFMB) is successfully introduced into the molecular chain. The TFMB modified spinning solutions (MF-TFMB) are obtained by one-step copolymerization, the TFMB-modified melamine-formaldehyde fibers (MFF-TFMB) are prepared by dry spinning. The surface contact angle and surface energy are measured by a contact angle measuring instrument. The thermal stability and mechanical properties of the fibers are measured by a thermogravimetric analyzer and a single-fiber strength tester. The results show that the introduction of the TFMB group reduces the surface free energy of the polymer and effectively improves the heat resistance and mechanical properties of the fiber. When the addition amount of TFMB is 3%, the MFF-TFMB-3% fiber has smooth surface and bubble-free inside, the breaking strength is 2.25 cN/dtex and the elongation at break is 11.85%. The limiting oxygen index is 32.5%, and the mass loss rate is decreased from 63.88% to 51.36% at 400°C. The fiber has excellent thermal stability and flame-retardant properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 32
·
IF 1.768
Xia Gao,Keping Chen,Shuen Liang,Chunchun Fan,Yigang Huang,Xiaorong Jia,Chunrong Tian,Jianhua Wang
Poly(propylene oxide) (PPO)-grafted nanosilica (NS)/polyurethane foam (PUF) composites were synthesized by a ring-opening polymerization catalytic process and reaction-molding technology. The raw NS and PPO–NS were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy. Scanning electron microscopy, dynamic mechanical analysis, and compressive strength tests were used to compare the morphology and thermal and mechanical properties of the PPO–NS/PUF and raw NS/PUF composites with a series of filler contents. The PPO–NS/PUF composites generally exhibited better morphology, thermal and mechanical properties than raw NS/PUF composites. Moreover, the PPO–NS/PUF composites with lower contents (0.5, 1 php) of filler showed even higher mechanical reinforcement than that with higher contents (1.5, 2 php) of filler, which was caused by the interaction between additives and PUF matrix. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42400.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 24
·
IF 1.866
Yufen Zhang,Xue Jiang,Ronglan Wu,Wei Wang
Thermo-induced multishape memory polymers are a growing focus of smart materials because of its promising applications. Multishape memory effect is generally attained by using polymers with broad phase transition and multiphase polymers. The latter is of particular interest for copolymerization and polymer compositing. One requirement has to be fulfilled to achieve multishape memory effect, which is to have two reversible phase transitions. In this study, we report synthesis of polymer composite composed of strong segregated polymers by using reaction-induced phase separation. We demonstrate the method by using polyurethane (PU) and poly(methacrylic acid) (PMAA). With adjusting the weight ratio, the polymer composites exhibit a phase spectrum from phase separation to miscible composite. The composite with PU/PMAA =3:1 demonstrated triple-shape memory effect. Based on the results, we argued the effect of segregation on the shape memory effect for polymer composites. With the addition of PMAA, the polymer composite also exhibits pH/water-induced shape memory effect. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43534.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 126
·期 4
·1277-1290
·
IF 1.289
Dongsheng Wang,Beijia Li,Weifeng Zhao,Yi Lu,Shudong Sun,Changsheng Zhao
Carboxylic poly(ether sulfone) membranes were prepared by a controlled acetylating and surface-oxidating reaction followed by the grafting of bovine serum albumin (BSA) and bovine serum fibrinogen (BFG) onto the surfaces. Attenuated total reflection–Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Micro BCA Protein Assay Kits confirmed that the proteins were successfully grafted onto the surfaces of the membranes. The protein grafting degrees were measured at different time intervals and under different conditions. The modified membranes showed higher hydrophilicity, lower protein (BSA and BFG) adsorption, and suppressed platelet adhesion values. Because of the binding of calcium ions in blood, the modified membranes showed longer plasma recalcification times, activated partial thromboplastin times, prothrombin times, and whole blood clotting times. The results indicate that the blood compatibility of the poly (ether sulfone) membranes could be improved after surface carboxylic modification and protein immobilization and that the modified membranes could be used in the blood purification field. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
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