聚苯胺的表面修饰及防腐性能

Surface Modification and Anticorrosive Properties of Polyaniline

用八甲基环四硅氧烷(D4)对聚苯胺(PANI)进行表面修饰,通过对产物的循环伏安(CV)、极化曲线(Tafel)以及接枝率的表征分析,考察了反应温度、反应时间、单体用量和pH值对产物的接枝效果、分散性和腐蚀电位的影响.同时,通过循环伏安(CV)、紫外-可见光谱(UV-Vis)、红外光谱(FTIR)、X射线衍射分析(XRD)和热重分析(TGA),对PANI表面修饰前后的结构和性能进行了比较.结果表明,通过D4对PANI颗粒表面进行修饰,PANI的分散性、分散稳定性和和防腐能力得到显著提高.

The surface of PANI was modified by octamethylcyclotetrasiloxane（D4）.The effects of reaction temperature,time,the amount of monomer and pH on the grafting effect,dispersibility and corrosion potential were investigated by characterizing cyclic voltammetry（CV）,polarization curves（Tafel） and grafting yield of the modified PANI.Besides,the structures and properties of PANI before and after modifying were compared with CV,UV-Vis,FTIR spectra,X-ray diffraction（XRD） and thermogravimetry（TGA）.The results indicate that the surface of PANI is modified effectively by D4,and the dispersibility,dispersibility stability and anti-corrosion of PANI are enhanced significantly.