壳聚糖-碳纳米管复合材料的合成与表征
Synthesis and characterization of chitosan-carbon nanotube composites.
作者信息
Carson Laura, Kelly-Brown Cordella, Stewart Melisa, Oki Aderemi, Regisford Gloria, Luo Zhiping, Bakhmutov Vladimir I
机构信息
Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, United States.
出版信息
Mater Lett. 2009 Mar 15;63(6-7):617-620. doi: 10.1016/j.matlet.2008.11.060.
Abstract
Acid functionalized single walled carbon nanotubes were covalently grafted to chitosan by first reacting the oxidized carbon nanotubes with thionyl chloride to form acyl-chlorinated carbon nanotubes which are subsequently dispersed in chitosan and covalently grated to form composite material, CNT-chitosan, 1, which was washed several times to remove un-reacted materials. This composite has been characterized by FTIR, 13C NMR, TGA, SEM and TEM and has been shown to exhibit enhanced thermal stability. The reaction of 1, with poly lactic acid has also been accomplished to yield CNTchitosan-g-poly(LA), 2 and fully characterized by the above techniques. Results showed covalent attachment of chitosan and chitosan-poly lactic acid to the carbon nanotubes.
摘要
首先使氧化的碳纳米管与亚硫酰氯反应形成酰氯化碳纳米管，随后将其分散在壳聚糖中并共价接枝，从而将酸官能化的单壁碳纳米管共价接枝到壳聚糖上，形成复合材料CNT-壳聚糖1，将其洗涤多次以除去未反应的物质。该复合材料已通过傅里叶变换红外光谱（FTIR）、碳-13核磁共振（13C NMR）、热重分析（TGA）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）进行了表征，并已证明具有增强的热稳定性。1与聚乳酸的反应也已完成，得到了CNT-壳聚糖-g-聚（乳酸）2，并通过上述技术进行了全面表征。结果表明壳聚糖和壳聚糖-聚乳酸与碳纳米管发生了共价连接。
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