原位聚合制备羧酸化多壁碳纳米管/聚酰亚胺纳米复合薄膜  

Polyimide/Carboxylated Multiple-walled Carbon Nanotubes Nanocomposites Films Fabricated by in situ Polymerization

作　　者：彭思敏[1] 王世敏[2,1] 万丽[1] 董兵海[2,1] 潘攀[1] 

机构地区：[1]湖北大学材料科学与工程学院,湖北武汉430062 [2]功能材料绿色制备与应用省部共建教育部重点实验室

出　　处：《功能材料与器件学报》2011年第4期385-391,共7页Journal of Functional Materials and Devices

基　　金：973计划前期研究专项(No.2010CB234606);湖北省教育厅重大科技项目(No.Z20101001);湖北自然科学基金重点项目(No.2009CDA027)

摘　　要：以微波辅助液相氧化法制备羧酸化多壁碳纳米管,并以4,4’-二氨基二苯醚(ODA)、羧酸化多壁碳纳米管(MWNTs-COOH)与均苯四甲酸二酐(PMDA)为原料,原位聚合制备羧酸化多壁碳纳米管/聚酰亚胺纳米(PI/MWNTs-COOH)复合薄膜。通过拉曼光谱(Raman)、透射电镜(TEM),傅里叶红外光谱(FT-IR)证实修饰后的碳纳米管表面接上-COOH等极性基团;扫描电镜(SEM)图片显示出MWNTs-COOH能均一分散在聚酰亚胺基体中,并通过傅里叶红外光谱(FT-IR)和X射线衍射光谱(XRD)证明聚酰亚胺与多壁碳纳米管的结构在薄膜制备过程中很稳定。通过动态力学(DMA)和差示扫描量热(DSC)分析发现薄膜的耐热性较好,且通过热失重(TGA)测试发现纳米复合材料的热稳定性比纯聚酰亚胺要高,主要是因为修饰后的多壁碳纳米管和聚酰亚胺基底之间强烈的相互作用,这就有利于耐热材料的实际应用。Polyimide/carboxylated multiple-walled carbon nanotubes（PI/MWNTs-COOH） nanocomposites were synthesized by in situ polymerization using 4,4＇-oxydianilline（ODA）,pyromellitic dianhydride（PMDA） and MWNTs-COOH which was prepared by microwave-assisted oxidation.Raman,FT-IR spectroscopy and TEM images confirmed that the surfaces of the functionalized MWNTs possessed the polar groups of carboxyl and hydroxyl groups.A homogeneous disperson of MWNTs-COOH was achieved in polyimide matrix as evidenced by SEM characterizations,while the structure of the polymide and multiple-walled carbon nanotubes was stable in the preparation process demonstrated by FT-IR and XRD spectroscopy.According to the DMA,DSC and TGA analysis,the resultant PI/MWNTs-COOH nanocomposites both exhibit excellent thermal resistance,and have stronger thermal stability than pure polyimide due to the strong interfacial interaction between the MWNTs-COOH and polyimide matrix,which is favorable for practical use in heat-resisting material.

关 键 词：聚酰亚胺 羧酸化多壁碳纳米管 纳米复合薄膜 

分 类 号：TB34[一般工业技术—材料科学与工程]