| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10603095 | Carbohydrate Polymers | 2011 | 6 Pages |
Abstract
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 12.8Â 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 12.8Â 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Li Yan, Peter R. Chang, Pengwu Zheng,