Polymer Chemistry
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2014
·Vol. 6
·期 10
·1786-1792
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IF 5.368
Qing Wan,Meiying Liu,Jianwen Tian,Fengjie Deng,Guangjian Zeng,Zhen Li,Ke Wang,Qingsong Zhang,Xiaoyong Zhang,Yen Wei
An efficient and facile strategy was developed for the surface modification of functional carbon nanotubes (CNTs) by the combination of mussel inspired chemistry and single electron transfer living radical polymerization (SET-LRP). This method involves the dopamine (DA) formation of polydopamine (PDA), which was coated on the surface of pristine CNTs via self-polymerization in alkaline solution. Then, the Br-containing initiator was covalently attached on the surface of CNTs modified with PDA. Subsequently, the poly[poly(ethylene glycol) methyl ether methacrylate] (PPEGMA) was in situ grown on the surface of Br-containing CNTs via the SET-LRP method. The resulting functional materials were characterized by a series of characterization techniques. It was demonstrated that PPEGMA chains were successfully conjugated to the surface of CNTs via a combination of mussel inspired chemistry and SET-LRP. After modifying with PPEGMA, the functional CNTs retain their pristine structure, but their dispersibility was significantly improved in polar and nonpolar solutions. Compared with previous methods, the strategy developed in this work is rather simple and effective. More importantly, due to the universality of mussel inspired chemistry, this novel strategy could also be used for the surface modification of many other materials.
研究领域:
材料科学
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聚合物化学
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纳米技术
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2013
·Vol. 51
·期 16
·3328-3332
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IF 3.543
Hou Chen,Gaojian Lv,Ying Liang,Jinming Sun
High performance polyacrylonitrile (PAN) was prepared with Mg powder as both reducing agent (RA) and supplemental activator (SA) by single electron transfer-living radical polymerization (RASA SET-LRP). First-order kinetics of polymerization with respect to monomer concentration, linear increase of molecular weight, and narrow polydispersity with monomer conversion, and the obtained high isotacticity PAN indicate that RASA SET-LRP in the presence of Mg powder could simultaneously control molecular weight and tacticity of PAN. compared with that obtained with ascorbic acid (VC) as RA, an obvious increase in isotacticity of PAN was observed. the block copolymer pan- b -pAN with molecular weight at 112,460, polydispersity at 1.33, and isotacticity at 0.314 was successfully prepared. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013 , 51 , 3328–3332
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2014
·
IF 3.107
Zhihai Hao,Dongju Wang,Hou Chen,Jinming Sun,Yuanyuan Xu
Sweet potato starch residue (SPSR) was used as starting material to prepare an eco-friendly adsorbent. SPSR was modified by bromoacetyl bromide to obtain a macroinitiator for surface-initiated single electron transfer-living radical polymerization (SI-SET-LRP) of acrylonitrile (AN) catalyzed by La(0)/hexamethylenetetramine (HMTA) in N,N-dimethylformamide (DMF) in the presence of ascorbic acid (VC). The amidoxime (AO) adsorbent was prepared by the reaction of the graft copolymer bromoactylated sweet potato starch (BSPS)/polyacrylonitrile (BSPS-g-PAN) with hydroxylamine. The maximum adsorption capacity for Hg(II) was 4.03 mmol·g–1. This simple method provided a novel approach to recycle and reuse agricultural residues for controlling heavy metal pollution.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
LANGMUIR
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2013
·
IF 4.187
Xiu-Juan Shi,Gao-Jian Chen,Yan-Wei Wang,Lin Yuan,Qiang Zhang,David M. Haddleton,Hong Chen
Surface-initiated SET-LRP was used to synthesize polymer brush containing N-isopropylacrylamide and adamantyl acrylate using Cu(I)Cl/Me6-TREN as precursor catalyst and isopropanol/H2O as solvent. Different reaction conditions were explored to investigate the influence of different parameters (reaction time, catalyst concentration, monomer concentration) on the polymerization. Copolymers with variable 1-adamantan-1-ylmethyl acrylate (Ada) content and comparable thickness were synthesized onto silicon surfaces. Furthermore, the hydrophilic and bioactive molecule β-cyclodextrin-(mannose)7 (CDm) was synthesized and complexed with adamantane via host–guest interaction. The effect of adamantane alone and the effect of CDm together with adamantane on the wettability and thermoresponsive property of surface were investigated in detail. Experimental and molecular structure analysis showed that Ada at certain content together with CDm has the greatest impact on surface wettability. When Ada content was high (20%), copolymer–CDm surfaces showed almost no CDm complexed with Ada as the result of steric hindrance.
研究领域:
材料科学
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生物医学工程
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高分子化学
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DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 100
·82503-82512
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IF 3.84
Yili Xie,Chengbin He,Leichun Liu,Liucheng Mao,Ke Wang,Qiang Huang,Meiying Liu,Qing Wan,Fengjie Deng,Hongye Huang,Xiaoyong Zhang,Yen Wei
The development of highly efficient adsorbents for the removal of organic dyes from wastewater has attracted much attention recently. Surface modification of adsorbents with polymers is a general strategy for enhancement of their adsorption capability. In this work, a novel strategy of a combination of mussel inspired chemistry and SET-LRP has been developed for the fabrication of highly efficient adsorbents, poly(sodium-p-styrene sulfonate) modified multi-walled carbon nanotubes (CNTs), for the first time. The adsorption applications of these CNT based polymer nanocomposites for the removal of a cationic dye (methylene blue, MB) from a water solution were also examined. The successful preparation of these CNT based polymer nanocomposites was confirmed by a series of characterization techniques. Furthermore, the influence of adsorption parameters including contact time, concentration of MB, adsorption temperature and time has been investigated. According to the experimental data, the adsorption capacity of MB was directly proportional to the contact time, while inversely proportional to the temperature. The maximum adsorption capacity of MB for CNT-PDA-PSPSH was 160 mg g−1, demonstrating the excellent adsorptive property of functional CNTs for MB. The method described in this work for the preparation of CNT based polymer nanocomposites is simple, effective and general, and could be a universal strategy for preparation of highly efficient adsorbents for environmental applications.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2012
·Vol. 51
·期 2
·457-462
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IF 3.919
Lijun Fan,Hou Chen,Zhihai Hao,Zhi Tan
Cellulose produced from cotton fibers was used as substrate for synthesis of oil-absorbing materials by single electron transfer-living radical polymerization. The cellulose macroinitiator was prepared by esterification of hydroxyl group with 2-bromoisobutyryl bromide (BiBB), followed by grafting with butyl methacrylate (BMA) and pentaerythritol triacrylate (PETA) to render a three-dimensional architecture. The polymerization was catalyzed by Cu(0) powder/hexamethylenetetramine (HMTA) and performed in N , N -dimethylformamide (DMF). Effects of cellulose, catalyst, reaction temperature, and time were investigated in detail. The maximum oil absorption to chloroform and toluene could reach 29.0 and 15.4 g·g −1 , respectively. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
POLYMER
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2019
·
IF 3.771
Xiaolin Wang,Rui Yang,Liyan Huang,Jun Li,Zhengping Liu
A series of starch-graft-poly (methyl methacrylate) (S- g -PMMA) copolymers were prepared by single electron transfer living radical polymerization (SET-LRP) at molecular level under mild conditions. The successful grafting polymerization was confirmed by FT-IR and 1 H NMR spectroscopies. The hydrolysate of S-g-PMMA via acid-catalyzed hydrolysis proved to be a mixture of 1-arm, 2-arm and 3-arm polymers by MALDI-TOF measurements. Furthermore, the micelles formed by S-g-PMMA copolymers in water were studied at various conditions by SEM, TEM and DLS measurements. The results indicate that the sizes of micelles decreased following the order of the common solvents of 1,4-dioxane, tetrahydrofuran , acetone and acetonitrile , and also increased with the increase of initial copolymer concentrations, addition rate of water and length of grafted chains.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
MACROMOLECULES
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2022
·
IF 6.057
Zhiqiang Wei,Dong Chen,Xinru Zhang,Li Wang,Wantai Yang
The rational design and precise synthesis of aggregation-induced emission (AIE) active polymers with diverse macromolecular structures are crucial to their applications in various fields. Herein, four tetraphenylethylene (TPE) bromopropionate initiators with the number of initiation sites of n = 1–4 were synthesized for the first time and applied in the Cu(0)-mediated single-electron transfer living radical polymerization (SET-LRP) of methyl acrylate (MA) and tert-butyl acrylate (tBA). Well-controlled polymerization and high chain-end fidelity were confirmed by 1H NMR and GPC. The produced polymers had diverse topology (linear/star) and the location of TPE moiety (chain-end/midchain/core), which were all precisely dictated by initiator structure. The macromolecular structure had a remarkable effect on the AIE properties of TPE-(PMA)n in THF/H2O mixtures and TPE-(PAA)n (obtained after deprotecting tert-butyl groups from TPE-(PtBA)n) in the B-R buffer solutions of different pH values. The fundamental insights gained into the macromolecular structure–AIE property correlation in our work are important for the design of AIE-active polymer-based functional materials.
研究领域:
材料科学
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化学
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DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2019
·
IF 3.074
Xiaolin Wang,Zhengping Liu,Liyan Huang
A novel pH and thermo dual-responsive graft copolymer , starch- graft -poly( N , N -diethyl aminoethyl methacrylate- co -poly(ethylene gly co l) methyl ether methacrylate) [starch-g-P(DEAEMA-co-PEGMA)], was successfully synthesized through single-electron transfer living radical polymerization (SET-LRP). The structure and molecular weight of the grafted chains were confirmed by 1 H NMR. These graft copolymers can self-assemble into micelles with starch backbone and PDEAEMA as the core and PPEGMA as the corona in water at pH 7.4. The critical micelle concentration (CMC) of the graft copolymers varied between 0.0313 and 0.1364 mg/mL, decreasing with an increase in the molecular weight of the grafted chains and the ratio of PDEAEMA and PPEGMA segments. The pH and thermo dual-responsive behaviors of starch-g-P(DEAEMA-co-PEGMA) micelles were investigated by DLS and TEM . As the pH decreasd from 8.0 to 5.5, the micelle sizes continued to increase due to the protonation of the PDEAEMA segments, and as the pH decreased to below 5.5, the micelles began to disassemble, which was verified by TEM observations. Upon heating, the size of the micelles decreased because of the shrinkage of the PDEAEMA segments. The pH and thermo dual-responsive behaviors of the starch-g-P(DEAEMA-co-PEGMA) micelles are reversible. Doxorubicin (DOX), a hydrophobic drug, was encapsulated in the micelles, and in vitro release from the drug-loaded micelles displayed good pH-responsive behavior.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2011
·Vol. 49
·期 13
·2924-2930
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IF 3.894
Hou Chen,Guangxi Zong,Lingfang Chen,Min Zhang,Chunhua Wang,Rongjun Qu
Samarium powder was applied as a catalyst for single electron transfer-living radical polymerization (SET-LRP) of acrylonitrile (AN) in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) with 2-bromopropionitrile as initiator and N,N,N ′ ,N ′-tetramethylethylenediamine as ligand. First-order kinetics of polymerization with respect to the monomer concentration, linear increase of the molecular weight with monomer conversion, and the highly syndiotactic polyacrylonitrile (PAN) obtained indicate that the SET-LRP of AN could simultaneously control molecular weight and tacticity of PAN. An increase in syndiotacticity of PAN obtained in HFIP was observed compared with that obtained by SET-LRP in N,-N -dimethylformamide (DMF). The syndiotacticity markedly increased with the HFIP volume. The syndiotacticity of PAN prepared by SET-LRP of AN using Sm powder as catalyst in DMF was higher than that prepared with Cu powder as catalyst. The increase in syndiotacticity of PAN with Sm content was more pronounced than the increase in its isotacticity. The block copolymer PAN- b -polymethyl methacrylate (52,310 molecular weight and 1.34 polydispersity) was successfully prepared. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
研究领域:
高分子化学
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材料科学
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有机合成
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催化化学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2017
·
IF 4.217
Guangjian Zeng,Tingting Chen,Long Huang,Meiying Liu,Ruming Jiang,Qing Wan,Yanfeng Dai,Yuanqing Wen,Xiaoyong Zhang,Yen Wei
Mussel inspired chemistry is a promising surface modification tool, which has attracted great research attention for different applications owing to its universality and interest properties. In this work, a rather simple and efficient method for the surface modification of MoS 2 nanosheets with copolymers was achieved through the combination of mussel inspired chemistry and single-electron transfer living radical polymerization (SET-LRP) using 2-methacryloyloxyethyl phosphorylcholine (MPC) and itaconic acid (IA) as the monomers. The obtained MoS 2 -PDA-poly(MPC-IA) nanocomposites were ascertained by a series of characterization techniques, such as nuclear magnetic resonance spectroscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy. Moreover, the MoS 2 -PDA-poly(MPC-IA) nanocomposites showed enhanced dispersbility and great biocompatibility. The results implied that the MoS 2 -PDA-poly(MPC-IA) nanocomposites showed great potential in the field of biomedical science. In this work, the drug loading capability and controlled drug release behavior towards CDDP have been investigated. The drug loading in MoS 2 -PDA-poly(MPC-IA) composites is as high as 55.26%. All of these above results suggested that the combination of mussel inspired chemistry and SET-LRP is a facile and efficient strategy for fabrication of MoS 2 based polymer nanocomposites with great potential application in biomedical fields.
研究领域:
材料科学
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生物医学工程
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聚合物化学
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药物递送系统
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产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2017
·Vol. 74
·期 12
·5231-5247
·
IF 1.43
Yang Dongcheng,Yu Lili,Chen Hou,Yu Yanbo,Xu Yuanyuan,Sun Jinming,Wang Yating
Bromoactylated apple seeds (BAS) was used as new source for the synthesis of environmental adsorbent. Apple seeds were modified by bromoacetyl bromide to obtain a macroinitiator for single electron transfer-living radical polymerization (SET-LRP) of acrylonitrile (AN). The amidoxime (AO) adsorbent was prepared by the reaction of the graft copolymer bromoactylated apple seeds (BAS)/polyacrylonitrile (BAS- g -PAN) with hydroxylamine. Amidoxime BAS- g -PAN (AO BAS- g -PAN) was used to remove Pb(II) and the maximum adsorption for Pb(II) was 1.58 mmol/g. AO BAS- g -PAN could also selectively adsorb Pb(II) from binary ion systems in the existence of Ag(I), Ni(II) and Zn(II). This efficient modifying approach provides a new powerful mean toward filling the gap on apple waste as a potential source for controlling heavy metal pollution.
研究领域:
环境科学
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高分子化学
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废物管理
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DOI
高影响因子
危险品化学品经营许可证（带存储）