Adsorption and polymerization of aniline on a carboxylic group-modified fibrous substrate

被引:10
作者
Wang, Jing [1 ,2 ]
Zhang, Kaka [3 ]
Zhao, Liang [1 ,2 ]
Ma, Wei [1 ]
Liu, Tieliang [1 ]
机构
[1] Henan Acad Sci, Inst Chem, Zhengzhou 450002, Peoples R China
[2] Henan Acad Sci, High & New Technol Res Ctr, Zhengzhou 450002, Peoples R China
[3] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
基金
中国国家自然科学基金;
关键词
Poly(acrylonitrile) fiber; Carboxylic group; Aniline; Adsorption; Polymerization; CHEMICAL POLYMERIZATION; CARBON NANOTUBES; WASTE-WATER; POLYANILINE; TEMPLATE; NANOCOMPOSITE; COMPOSITES; REMOVAL;
D O I
10.1016/j.synthmet.2013.10.028
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A carboxylic group-modified poly(acrylonitrile) fiber (CPAN) was prepared and used as a substrate for aniline adsorption and polyaniline (PANI) deposition in this study. Results from batch adsorption tests showed that grafting of carboxylic group could substantially improve the adsorption capacity of CPAN for aniline monomer at optimal pH 3.0-6.0; however, in strong acidic solutions, both the raw poly(acrylonitrile) fiber (PAN) and the as-synthesized CPAN had no obvious adsorption for aniline. Results from in-situ polymerization tests showed that both PAN and CPAN could obviously accelerate the polymerization of aniline, as indicated from evolution of solution temperature and UV-vis spectra. However, as shown by SEM photographs, the deposited PANI was more uniform on CPAN as compared with PAN. Besides, the produced PANI/CPAN composite showed higher PANI content and conductivity than the PANI/PAN composite. The proposed mechanism was that the intermediate products of aniline polymerization were apt to adsorb on both the PAN and CPAN surfaces, and thus substantially accelerated the polymerization rates. Due to the relatively strong site-to-site electrostatic interaction and hydrogen bonding, higher content of PANI was deposited on the CPAN surface and the distribution was more uniform as compared with PAN. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:6 / 12
页数:7
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