Preparation,characterization, and properties of disulfide-containing polyethyleneimine grafted carbon nanotubes |
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Authors: | Qiao Zhang Ming Lei Shuwen Huang Huili Fu Guoping Yan Liang Li |
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Affiliation: | School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, People's Republic of China |
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Abstract: | Novel functionalized carbon nanotubes (CNTs) were prepared by grafting disulfide-containing polyethyleneimine (SSPEI) to CNTs. The SSPEI were synthesized by Michael addition between cystamine bisacrylamide and low molecular weight branched 1.8 kDa PEI. Three SSPEI grafted carbon nanotubes (CNTs-SSPEI) were successfully prepared through grafting SSPEI to CNTs. The grafted ratios were 32.26%, 43.11%, and 51.50%, respectively. Moreover, the grafted ratio could be tuned by adjusting the CNTs/SSPEI ratio during the process of preparation. The CNTs-SSPEI was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis. The CNTs-SSPEI showed better dispersability and stability in water than CNTs. In addition, the SSPEI on the surface of CNTs-SSPEI could be degraded in the presence of dithiothreitol. |
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Keywords: | Carbon nanotubes polyethyleneimine functionalized dispersability gene vector |
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