JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2014
·Vol. 52
·期 7
·1020-1027
·
IF 3.245
Danfeng Yang,Dan He,Yonggui Liao,Zhigang Xue,Xingping Zhou,Xiaolin Xie
The polar solvents, N -methylpyrrolidone (NMP), N , N -dimethylformamide (DMF), and acetonitrile (CH 3 CN) were used as ligands for iron(III)-mediated activators generated by electron transfer atom transfer radical polymerizations (AGET ATRPs) of methyl methacrylate (MMA) with various initiators and reducing agents. Polymerizations were conducted with a molar ratio of [MMA] 0 /[initiator] 0 /[FeBr 3 ] 0 /[reducing agent] 0 = 100:1:1:0.5 and a volume ratio of MMA/solvent = 2:1 at 60 °C to investigate the effects of initiator, solvent and reducing agent, and most of the systems showed the typical features of “living”/controlled radical polymerization. In order to get a deeper understanding of the mechanism, the amount of the reducing agent was changed to study the polymerization behavior. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52 , 1020–1027
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 6
·1572-1581
·
IF 2.347
Xu Qingbo,Ke Xiating,Zhang Yanyan,Wang Peng
Improving the surface roughness and reducing the surface energy are the main strategies for constructing cotton fabrics with superhydrophobic surface. However, the complex finishing process and poor durability still impede the production and application of superhydrophobic cotton fabrics. Therefore, it is critical to produce superhydrophobic fabrics with excellent durability via a noncomplicated method. In this work, monomers of methyl methacrylate (MMA) and trifluoroethyl methacrylate (TFMA) were polymerized via free radical polymerization to produce a fluoropolymer. Then, the fabric was coated with the fluoropolymer to construct a superhydrophobic surface via the pad-dry-cure technology. The TFMA unit in the fluoropolymer had lower surface energy than the MMA unit. Under the high-temperature curing condition, the MMA unit in the fluoropolymer was grafted onto the cotton fabric via transesterification, and the TFMA was exposed on the fabric surface. The finished fabric showed durable superhydrophobic properties, outstanding oil-water separation properties, and excellent self-cleaning properties. Given the results, the finished fabric has great potential application in clothing and industrial fields.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2013
·Vol. 20
·期 6
·1-7
·
IF 2.019
Wu Xueli,Qiu Jianhui,Liu Peng,Sakai Eiichi,Lei Lin
DENKA BLACK/polystyrene nanocomposites (DB/PS) were successfully prepared through a facile strategy. Some of the styrene molecules were grafted and polymerized onto the surface of the DB via the in situ free radical addition process in ionic liquid, and others self-polymerized and coated on the polystyrene grafted DB. The ionic liquid improves the grafting percentage because of its high viscosity. The electrical properties of polymer composites before and after the grafting were measured. It was found that the electrical conductivity of the DB/PS composites decreased with increasing amounts of monomer styrene and initiator 2, 2′-azobis (isobutyronitrile) (AIBN). The microstructure, morphology and thermal properties of the composites were characterized by Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. The results proved that the polystyrene had been successfully grafted onto the DB surface.
研究领域:
高分子化学
·
纳米复合材料
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功能材料
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电学性能
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材料科学
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2012
·
IF 2.479
Yu Wang,Haiqiang Wu,Jing Luo,Xiaoya Liu
We report on the fabrication of an amphiphilic random copolymer-based colorimetric and fluorescent chemosensor for Fe 3+ ions that was prepared by free radical polymerization of a novel rhodamine-based Fe 3+ -recognizing monomer , R6GEM, with N -vinylpyrrolidone (NVP). Because of its amphiphilic property, the copolymer P(NVP-co-R6GEM) can self-assemble into micelles , which allows it to be used as a chemosensor in aqueous solution. Upon addition of Fe 3+ ions to the micelle solution, visual color change and fluorescence enhancement were observed. Moreover, other metal ions did not induce obvious changes to the absorption and fluorescence spectra . The water dispersibility and biocompatibility of these polymer micelles could provide a new strategy for detecting analytes in environmental and biological systems.
研究领域:
材料科学
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化学
·
生物分析
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 5
·
IF 1.64
Jinku Xu,Pengfei Yang,Leilei Zhang,Guanghua Huo
Transparent silicone hydrogels with interpenetrating hydrophilic/hydrophobic networks were simultaneously synthesized on the basis of the radical polymerization of the methacrylic monomer of 3-methacryloxypropyl tris(trimethylsiloxy) silane (TRIS)/ N,N -dimethylacrylamide (DMA) and the addition polymerization of hydroxyl-grafted polysiloxane (HPSO)/isophorone diisocyanate. The curing temperature was set at 80°C by a differential scanning calorimetry study. The polymerization process was studied by in situ Fourier transform infrared spectroscopy. The results indicate that the curing time was about 4.5 min, and the addition polymerization had a faster rate than radical polymerization. Then, the radical polymerization rate increased rapidly, and this led to instant curing. The interpenetrating polymer network (IPN) silicone hydrogels were characterized by swelling kinetics and dynamic mechanical thermal analysis. The results show that all of the hydrogels reached swelling equilibrium at about 4 h in water, and the IPN silicone hydrogels with a hydrophobic network of HPSO indicated a slower water transport than that of the copolymerization hydrogel of DMA and TRIS. The hydrophobic network was finely dispersed in the hydrophilic network, and the increasing hydrophobic network of HPSO decreased the glass-transition temperature of the IPN silicone hydrogels. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41399.
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2013
·
IF 1.7
Jinku Xu,Leilei Zhang,Yongchun Zhang,Tianduo Li,Guanghua Huo
Hydrogels with interpenetrating network (IPN) can overcome thermodynamic incompatibility and obtain transparent materials with limited phase separation. In this report, hydroxyl-grafting polysiloxane (HPSO) was synthesized and transparent silicone hydrogels with interpenetrating network were simultaneously prepared based on radical polymerization of methacrylic monomer of 3-methacryloxypropyl tris(trimethylsiloxy)silane/N,N-dimethylacrylamide and addition polymerization of HPSO/isophorone diisocyanate. The silicone hydrogels were characterized by dehydration kinetics, tensile tester, light transmittance, ion permeability, oxygen permeability, and lysozyme deposition. The results show that increasing the proportion of hydrophobic network of HPSO in the IPN silicone hydrogel decreases equilibrium swelling ratio, ion permeability, Young’s modulus, and lysozyme deposition; on the contrary, increased tensile strength, elongation at break and oxygen permeability. Puerarin and ketoconazole were used as models to evaluate the drug loading and in vitro release behavior of the silicone hydrogels. It is revealed that the amount of loaded drugs in the hydrogel decreases with the increase of HPSO network in the hydrogels. All the silicone hydrogels exhibit extended release behavior, especially for ketoconazole, the in vitro release is divided into two phases corresponding to the rapid release at initial 24 h and relatively slow release from 125 to 360 h.
研究领域:
材料科学
·
药剂学
·
眼科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2011
·Vol. 49
·期 22
·4721-4724
·
IF 3.894
Hou Chen,Min Zhang,Mengmeng Yu,Hongyan Jiang
Graphical Iron tube was applied as catalyst source in the design of continuous SET-LRP of AN without any ligand using BPN as initiator in NMP and DMF, respectively. First-order kinetics of polymerization with respect to the monomer concentration, linear increase of the molecular weight, and narrow polydispersity with monomer conversion showed the controlled radical polymerization characters. An increase in polymerization rate in NMP was observed compared with in DMF. The living feature of PAN was verified by chain extensions of PAN with MMA.
研究领域:
化学工程
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 13
·8855-8866
·
IF 5.044
Peng Panpan,Zhang Ziwen,Yang Jianjun,Wu Mingyuan,Wu Qingyun,Liu Jiuyi,Zhang Jianan
Abstract An N -halamine precursor 2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido)ethyl methacrylate (SCMHBMA) was synthesized and grafted on cotton fabrics via atom transfer radical polymerization for antibacterial function after chlorination. The preparation and chlorinated cotton fabrics (Cotton-g-PSMA-Cl) were characterized with FTIR, XPS, SEM, and TGA. The properties of prepared Cotton-g-PSMA-Cl, including thermal property, antibacterial efficiency, durability, and stability, were systematically evaluated. The results showed that these chlorinated Cotton-g-PSMA-Cl fabrics possessed excellent antibacterial activity against E. coli. and S. aureus . After 10 washing cycles and 60 days of routine storage, active chlorine concentrations (Cl + %) were reduced only 22% and 18%, respectively, and the reduced Cl + % effectively reverted by simple rechlorination. This new N -halamine antibacterial cotton composite with superior antibacterial properties exhibited potential for future application in the long-term antibacterial field. Graphic abstract
研究领域:
材料科学
·
微生物学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Zhaoquan Zheng,Bingyu Wang,Jing Chen,Yan Wang,Ziyue Miao,Cenyao Shang,Qiang Zhang
Glycopolymer has been developed in bactericidal applications, but the traditional synthesis, such as click chemistry, needs poly-step reactions and complicated processes. Herein, incorporating the glyco-units into the polymers by quaternization has been exploited to give a facile strategy by Copper-mediated reversible deactivation radical polymerization (Cu(0)-RDRP) to prepare quaternized poly(ionic liquid)s (PILs) with pendant saccharide. The obtained PILs have the suitable property of killing typical Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus . Simultaneously, they perform the lower hemolytic rate of blood cells, higher selectivity index against bacteria, and higher affinity with Concanavalin A (ConA) than those quaternized by bromohydrin at the same quaternization degree. This result demonstrated that the introduced saccharide units, such as glucose and mannose, could maintain the electrostatic interaction to kill bacteria, perform lectin recognition behavior and interaction with ConA, and relatively harmlessness against red blood cells. Moreover, the sugar-containing PILs became insoluble and still antibacterial after anion exchange reaction. These new findings illuminated that such quaternized antibacterial agents with saccharide units that are easy-to-prepare, low cytotoxic could pave the way for further water disinfectant and pathogen control application.
研究领域:
生物材料学
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高分子化学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2014
·
IF 2.235
Dongju Wang,Hou Chen,Fujun Cao,Jinming Sun
Zinc powder was used as both reducing agent and supplemental activator for atom transfer radical polymerization via activators regenerated by electron transfer (ARGET ATRP) to prepare polyacrylonitrile (PAN). Zinc powder was found to be an excellent additional agent with better controlled behavior, higher monomer conversion, and faster polymerization rate in comparison with ascorbic acid (VC). The effects of catalyst, ligand, and initiator on polymerization rate and molecular weight of PAN were investigated in detail. The resulting PAN was modified and employed as an adsorbent for removal of metal ions. Compared with Cu(II) and Pb(II), the modified PAN showed an excellent adsorption performance toward Hg(II).
研究领域:
高分子化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yaoyao Liu,Tingting Wang,Chuanbao Xie,Xiujuan Tian,Liang Song,Lei Liu,Zhongwei Wang,Qing Yu
A series of new naphthyl-based acylphosphine oxides (N1–N3) have been designed and synthesized. The obtained compounds could be used in the photo-initiated free radical polymerization (FRP). The performances of N1–N3 in the FRP of trimethylolpropane triacrylate (TMPTA) and their UV–vis spectra were evaluated and compared with 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO, a commercial photoinitiator). Results showed that N1–N3 possessed higher molar absorption coefficients and wider absorption wavelength than TPO. Under the same reaction conditions, N3 exhibited the best double bond conversion (DC) of TMPTA in the tested photoinitiators. Moreover, the calculated migration of N1–N3 of the solidified samples was 1/7, 1/3 and 1/23 of TPO, indicating the lower migration properties. Possible reasons of the performance of N1∼N3 were proposed.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 18
·6572
·
IF 4.6
Dandan Jiang,Minghao Zheng,Xiaofan Ma,Yingzhen Zhang,Shaohua Jiang,Juanhua Li,Chunmei Zhang,Kunming Liu,Liqing Li
A fluorescent and colorimetric poly (acrylamide)-based copolymer probeP(AAm-co-RBNCH)has been designed via free radical polymerization of a commercial acrylamide monomer with a rhodamine-functionalized monomerRBNCH. Metal ion selectivity ofRBNCHwas investigated by fluorescence and colorimetric spectrophotometry. Upon addition of Fe3+, a visual color change from colorless to red and a large fluorescence enhancement were observed for the ring-opening of the rhodamine spirolactam mechanism. The monomer gives a sensitive method for quantitatively detecting Fe3+in the linear range of 100–200 μM, with a limit of detection as low as 27 nM and exhibiting high selectivity for Fe3+over 12 other metal ions. The hydrogel sensor was characterized by FTIR, and the effects ofRBNCHamount on gel content and swelling properties were explored. According to the recipe of 1.0 mol%RBNCHto the total monomers, the fabricated hydrogel sensor displayed a good swelling property and reversibility performance and has potential for application in the imaging of Fe3+level in industrial wastewater.Keywords:hydrogel sensor;rhodamine;selectivity;naked-eye detection;free radical polymerization
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）