摘要
采用原位聚合法制备PANI/高岭土核壳结构复合材料,研究了反应条件对复合材料电导率的影响,分析了复合产物微观形貌及热稳定性的变化。结果表明:高岭土层状不规则断裂面具有吸附作用,使苯胺在高岭土表面发生聚合,同时高岭土的二维层状结构起到隔热屏障作用,最终形成具有一定导电和耐热性能的复合材料。SEM和XRD分析显示PANI仅包覆在高岭土表面并未进入层间结构;FT-IR分析得出复合物具有PANI和高岭土的特征吸收峰;TG显示复合物具有良好耐热性,在268℃开始失重,最大失重率仅为9%;复合材料最高电导率达0.86S·cm-1。确定了各组分最佳配比:苯胺/APS=1/1.5(摩尔比),苯胺/高岭土=2/5(质量比),反应体系pH=1,反应温度25℃,产物综合性能最佳。
Preparation of PANI/ kaolin composite material of core-shell structure was through the in situ polymerization method, the effect of reaction conditions on the electrical conductivity of the composite was studied, and the changes of morphology and thermal stability of the composite were analysed. The results showed that., the inner layer of irregular fracture surface had adsorption, the aniline in the kaolin surface was po!ymerized to form a conductive path, kaolin two-dimensional layered structure to insulation barrier. And then the composite with certain conductive and heat resistant performance was obtained. SEM and XRD analysis showed that PANI only wraped kaolin surface not to enter the interlayer of structure. FT-IR analysis showed that the composite had the characteristics absorption peaks of PANI and kaolin. TG displaied that the composite had good heat resistance, at 268℃ to weight loss, the maximum weight loss rate was only 9 %, and the highest conductivity reached 0.86S/cm. The optimum proportion was： PANI/APS= 1/1.5 （molar ratio）, aniline / kaolin= 2/5 （mass ratio） ,pH= 1 reaction system, reaction temperature 25 ℃, the properties were the best.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第9期165-167,172,共4页
New Chemical Materials
关键词
聚苯胺
高岭土
核壳结构
复合材料
电导率
polyaniline（PANI）, kaolin, core-shell structure, composite material, conductive rate
作者简介
王知（1989-），男，硕士研究生，主要研究方向：导电高分子合成。
