使用硅烷偶联剂苯胺甲基三乙氧基硅烷(AMTES)改性凹凸棒粘土(ATP),制备了表面具有自组装单片层的SAM-ATP,并以其为模板,制备了结构较为均一的 SAM-ATP/PANI 纳米纤维。对制备工艺中 SAM-ATP 的用量进行了探讨,研究表明,当SAM-ATP含量为15.4%(质量分数)时,SAM-ATP/PANI纳米纤维结构较为均一、分散性良好,且具有最好的室温电导率2.3×10-4 S/cm,使用紫外-可见分光光度计(UV-Vis)对电导率的变化原因进行了分析,使用热重分析仪(TGA)对材料的热稳定性进行了探讨,研究显示SAM-ATP的引入可有效提高PANI热稳定性。使用傅立叶变换红外分光光度计(FT-IR)和透射电子显微镜(TEM)对 SAM-ATP/PANI 纳米复合材料的结构和形貌进行了表征。
Core-shell conducting nanofibers SAM-ATP/PANI were prepared by the encapsulation of attapulgite (ATP)template with polyaniline (PANI)after the surface modification with anilino methyl triethoxysilane (AMTES)to form a self-assembled monolayer (SAM)on the surface of ATP needle-shaped particle (SAM-ATP).The nanofibers of 15.4wt% SAM-ATP/PANI with a better uniformity and dispersity,and the conduc-tivity of 15.4wt% SAM-ATP/PANI nanofibers at room temperature was determined to be 2.3×10-4S/cm, larger than pure PANI.Moreover,thermal stability of SAM-ATP/PANI nanofibers was clearly improved with the increasing of SAM-ATP.These trends were accompanied by significant structural changes as evidenced by transmission electron microscopy,Fourier transform IR and UV-visible spectroscopy.
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