无机填料对硅橡胶基耐热复合涂层的影响  

Effect of Inorganic Fillers on Heat-resistant Silicone Rubber-based Composite Coatings

作　　者：杨晓军[1] 文卿 符寒光[1] 贺定勇[1] YANG Xiaojun;WEN Qing;FU Hanguang;HE Dingyong(Institute of Welding and Surface Engineering Technology,College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料科学与工程学院,焊接与表面工程技术研究所,北京100124

出　　处：《北京工业大学学报》2025年第1期13-21,共9页Journal of Beijing University of Technology

基　　金：北京市教育委员会科技计划资助项目(KZ202210005004)。

摘　　要：以硅橡胶为基体,添加无机填料制备的耐热涂层在耐热防腐方面有重要应用前景。采用自制改性硅橡胶作基体,添加不同配比的高岭土、二氧化硅和氧化铝,制备了复合涂层。采用扫描电子显微镜(scanning electron microscopy,SEM)观察了硅橡胶基体中无机填料的分散状况,采用热重分析仪(thermogravimetric analyzer,TGA)对复合涂层的热解温度和失重率进行了分析。结果表明:在复合体系中,无机填料与基体的相容性较好,分散均匀;与基体材料相比,无机填料的添加可有效提高复合材料的耐热性。填料质量分数为20%的复合涂层,其在800℃时质量残留率比自制改性硅橡胶的基体提高了10%以上。The heat-resistant coating prepared by silicone rubber and inorganic fillers has important application prospects in heat-resistant and corrosion-resistance environments.In this paper,self-made modified silicone rubber was used as the matrix,and different proportions of kaolin,silica and alumina were added to prepare the composite coatings.The dispersion of inorganic fillers in silicone rubber matrix was observed by scanning electron microscopy(SEM).The pyrolysis temperature and weight loss rate of the composite coatings were analyzed by thermogravimetric analyzer(TGA).Results show that in the composite system,the inorganic filler has good compatibility with the matrix and is uniformly dispersed.Compared with the matrix material,the addition of inorganic fillers can effectively improve the heat resistance of the composites.The mass residual rate at 800℃ of the composite coating with 20%filler content is more than 10%higher than that of the self-made modified silicone rubber matrix.

关 键 词：硅橡胶 高岭土 耐热性 微观形貌 涂层 复合材料 

分 类 号：TB35[一般工业技术—材料科学与工程]