期刊
POLYMER
卷 55, 期 18, 页码 4619-4626出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2014.07.014
关键词
Graphite oxide; Poly (L-lactide); Click chemistry
资金
- National Natural Science Foundation of China [21074079, 21104050, 21274099]
- China Postdoctoral Science Foundation [2013M541715]
- Natural Science Foundation of Jiangsu Province of China [BK2011356]
Two simple and effective methods, click chemistry and supramolecular interactions, are demonstrated here to synthesize well-defined poly(L-lactide) (PLLA) functionalized graphene oxide (GO) sheets. We provide a simple method to introduce azide groups on GO sheets by the ring opening reaction of sodium azide with the epoxide groups of GO. The GO-N-3 sheets can easily undergo click reaction with alkyne-terminated PLLA by grafting onto method to produce GO/PLLA composites with high grafting ratio and exfoliated structure. Interestingly, GO-N-3 can be grafted with oxygen-containing polymers such as PLLA, polymethyl methacrylate (PMMA) or polyethylene oxide (PEO) via supramolecular interactions between the azide groups and these oxygen atoms on polymers, producing GO/polymer composites with low grafting ratio and intercalated structure. These grafting onto methods are useful to produce a variety of GO/polymer composites with different structure via click reaction or supramolecular interactions, which have potential applications in material science. (C) 2014 Elsevier Ltd. All rights reserved.
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