Microwave-assisted covalent modification of graphene nanosheets with chitosan and its electrorheological characteristics
Microwave-assisted covalent modification of graphene nanosheets with chitosan and its electrorheological characteristics
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DOI：
10.1016/j.apsusc.2010.10.035
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发表时间：
2011-01-15
影响因子：
6.7
通讯作者：
Xu, Chunhui
中科院分区：
文献类型：
--
作者：
Hu, Huating;Wang, Xianbao;Xu, Chunhui
石墨烯纳米片的生物功能化和操控对于生物医学研究和应用具有重要意义。在微波辐射下，以N，N-二甲基甲酰胺为介质，通过氧化石墨烯纳米片（GONS）的羧基与壳聚糖的氨基反应，然后用水合肼将氧化石墨烯纳米片还原为石墨烯纳米片，成功制备了壳聚糖修饰的石墨烯纳米片。采用FTIR、TEM、FESEM、XRD和TG等手段对石墨烯纳米片-壳聚糖（GNS-CS）纳米复合材料进行了表征。结果表明，壳聚糖通过酰胺键共价接枝到石墨烯纳米片表面。溶解度测试表明，所得纳米复合材料在乙酸水溶液中分散良好。特别地，研究了GNS-CS纳米复合材料的电流变性能。这种新型的纳米复合材料在生物医学领域具有广阔的应用前景。(C)2010爱思唯尔有限公司版权所有。
Biofunctionalization and manipulating of graphene nanosheets (GNS) are important for biomedical research and application. Chitosan (CS) modified graphene nanosheets have been successfully prepared under microwave irradiation in N,N-dimethylformamide medium, which involved the reaction between the carboxyl groups of graphene oxide nanosheets (GONS) and the amido groups of chitosan followed by the reduction of graphene oxide nanosheets into graphene nanosheets using hydrazine hydrate. The as-prepared graphene nanosheets-chitosan (GNS-CS) nanocomposites have been characterized by FTIR, TEM, FESEM, XRD and TG. The results showed that chitosan was covalently grafted onto the surface of graphene nanosheets via amido bonds. Solubility measurements indicated that the resultant nanocomposites dispersed well in aqueous acetic acid. Especially, the electrorheological (ER) properties of the GNS-CS nanocomposites have been investigated. It is believed that this new nanocomposites may be promising for biomedical applications. (C) 2010 Elsevier B.V. All rights reserved.