Preparation and characterization of starch-grafted multiwall carbon nanotube composites

被引：30
|
作者：
Yan, Li [1 ]
Chang, Peter R. [2 ]
Zheng, Pengwu [1 ]
机构：
[1] Jiangxi Sci & Technol Normal Univ, Sch Pharm, Nanchang 330013, Jiangxi, Peoples R China
[2] Agr & Agri Food Canada, Bioprod & Bioproc Natl Sci Program, Saskatoon, SK S7N 0X2, Canada
来源：
CARBOHYDRATE POLYMERS | 2011年 / 84卷 / 04期
关键词：
Carboxylated multiwall carbon nanotubes; Starch; Chitosan; Cyclic voltammograms; COMPLEXES; AMYLOSE;
D O I：
10.1016/j.carbpol.2011.01.042
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A starch/carboxylated multiwall carbon nanotube (CCNT) composite (CCNT-starch) was prepared by covalently grafting a natural polymer starch onto the surfaces of CCNT. The obtained CCNT-starches were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis) and electrochemical measurement. FTIR revealed that the covalent bonds between -OH groups of soluble starch and CCNT were formed in CCNT-starch. TEM and TG showed that CCNTs were covered with the grafted starch about 7.7 and 12.8 wt% in CCNT-starch, respectively. The grafted starch facilitated the dispersion of CCNT-starch in water and chitosan films because of the hydrophilic polysaccharide structure of starch components. CCNT-starch containing 12.8 wt% starch in water could form homogeneous solutions without obvious aggregation of CCNTs. The electrochemical properties of the CCNT-starch were characterized by casting CCNT-starch and chitosan solution on glassy carbon electrode. Compared to CCNT, CCNT-starch exhibited a couple of redox peaks in cyclic voltammograms testing. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1378 / 1383
页数：6
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