聚苯胺/碳纳米管复合体的制备及其三阶非线性光学性能研究  

In-situ polymerization and third-order nonlinear optical properties of polyaniline/carbon natotube composite

作　　者：封伟[1] 易文辉[2] 冯奕钰[1] 吴子刚[1] 张振中[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072 [2]西安交通大学电子与信息工程学院,西安710049

出　　处：《物理学报》2006年第7期3772-3777,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50573057);天津市应用基础研究基金(批准号:05YFJMJC08800)资助的课题.~~

摘　　要：通过原位吸附-受限生长聚合法成功制备了聚苯胺/碳纳米管(PANI/MWCNT)复合体.红外光谱和拉曼光谱证实了在碳纳米管(MWCNT)表面的包覆层为聚苯胺(PANI).紫外—可见吸收光谱表明随着MWCNT含量的增加PANI的吸收发生红移且强度提高.扫描电子显微镜和透射电子显微镜观察发现,PANI/MWCNT复合体直径为40—70nm,其中PANI的包覆层厚度约为15—20nm.利用四波混频方法测试它们的三阶非线性光学系数,结果发现PANI/MWCNT复合体的三阶非线性光学系数比纯PANI大,这说明在MWCNT与PANI之间形成了复杂的分子间π-π电子非线性运动.The composites of polyaniline/multi-walled carbon natotubes （PANI/MWCNT） were prepared by electrostatic interaction between MWCNT and aniline via in situ polymerization. The results of Fourier transform infrared spectroscopy, Raman spectroscopy and ultraviolet-visible absorption spectroscopy indicated that aniline molecules were adsorbed and polymerized on the surface of MWCNTs. The composite dimensions were observed by scanning electron microscope and transmission electron microscope, the diameter of PANI/MWCNT was measured to be about 40-70 nm, and the thickness of the coated polyaniline was about 15-20 nm. Third-order optical nonlinear susceptibility of PANI/MWCNT composites were measured by degenerate four-wave mixing. The results showed that the resulting PANI/MWCNT composites exhibited larger third-order optical nonlinear susceptibilities than that of pure PANI, which can be ascribed to the π-electron coupling between the PANI and the MWCNTs.

关 键 词：碳纳米管 聚苯胺 复合体 三阶非线性光学系数 

分 类 号：TB383.1[一般工业技术—材料科学与工程]