无溶剂聚硅氧烷涂层的制备及防腐性能研究%Preparation and anticorrosion performance of solvent-free polysiloxane coatings
开封夸克新材料有限公司,河南 开封 475003 河南省科学院化学研究所,河南 郑州 450002 河南大学,河南 郑州 450046 哈尔滨工业大学,黑龙江 哈尔滨 150006
2025-12-09
聚硅氧烷 涂层 防腐蚀 硅含量
[目的]无溶剂聚硅氧烷涂料凭借其独特的分子结构和环境友好特性,成为新一代防腐蚀材料的研发焦点.[方法]制备了3种硅含量不同的聚硅氧烷涂料,利用傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)、能谱(EDS)、X射线衍射(XRD)、热重分析(TGA)等手段对其微观结构和化学组成进行了表征,并对性能进行了对比测试.[结果]3种聚硅氧烷涂层在经历了盐雾暴露(1 000 h)、5%硫酸浸泡(30 d)、5%氯化钠溶液浸泡(30 d)、湿热测试(1 000 h)及冷热循环(15轮)后均保持结构完整.高硅含量聚硅氧烷涂层虽提升了耐候性,却削弱了附着力与耐碱性,低硅含量涂层则反之,中硅含量涂层的这3项性能均居中.[结论]硅含量不同的无溶剂聚硅氧烷涂料各有优劣,适用于不同的防腐蚀应用场景.%[Objective]Solvent-Free polysiloxane coatings have emerged as a research focus for next-generation anticorrosion materials due to their unique molecular structure and environmental friendliness.[Method]Three polysiloxane coatings with different silicon contents were prepared.Their microstructure and chemical composition were characterized by Fourier-transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),energy-dispersive spectroscopy(EDS),X-ray diffraction(XRD),and thermogravimetric analysis(TGA),followed by comparative performance testing.[Result]All three polysiloxane coatings maintained structural integrity after salt spray exposure(1 000 hours),immersion in 5%H2SO4 or NaCl solution(30 days),damp-heat testing(1 000 hours),and thermal cycling(15 cycles).High-silicon polysiloxane coatings showed improved weatherability but reduced adhesion and alkali resistance,while low-silicon coatings exhibited the opposite behavior.Medium-silicon coatings displayed intermediate performance in all three aspects.[Conclusion]Solvent-free polysiloxane coatings with different silicon contents each have their own advantages and disadvantages,making them suitable for different anticorrosion applications.
