OALib Journal期刊
ISSN: 2333-9721
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疏水纳米二氧化硅石材防护涂料制备及表征
Keywords: 纳米二氧化硅,疏水性,3-缩水甘油丙基三甲氧基硅烷,正硅酸乙酯
Abstract:
?通过超声辅助、氨水催化,使用十六烷基三甲氧基硅烷作为正硅酸乙酯的共前躯体,在交联剂3-缩水甘油丙基三甲氧基硅烷(gptms)和无交联剂下,溶胶、凝胶过程制备了疏水纳米二氧化硅。使用ft-ir、纳米粒度仪、tg-dta等分析方法表征疏水纳米二氧化硅,测定表明该粒子直径大小集中在30~50nm,gptms的添加提高了疏水纳米复合物的稳定性。水被疏水二氧化硅涂料处理后,水接触角从处理前的20°上升到93°。耐酸性评价显示疏水纳米二氧化硅涂料处理的石材具有良好的耐酸性。
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