疏水纳米二氧化硅石材防护涂料制备及表征  

Preparation and Characterization of Hydrophobic Nanosilica Protective Coating for Historic Stone

作　　者：徐飞高[1] 李丹[2] 郭瑛[1] 高士祥[3] 

机构地区：[1]南昌大学理学院,南昌330031 [2]南昌大学环境与化学工程学院,南昌330031 [3]南京大学环境学院,南京210093

出　　处：《涂料工业》2011年第4期1-3,8,共4页Paint & Coatings Industry

基　　金：江苏省社会发展项目资助课题(BS2006050);南昌大学博士启动基金资助课题(300650)

摘　　要：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。Hydrophobic silica nanopartieles have been prepared by using hexadecyhrimethoxysilane as precausor of tetraethoxyorthosilicate with and without a crosslinking agent, 3 - glycidoxypropyhrimethoxysilane （GPTMS） and ammonium hydroxide as catalyst, uhrasonication as aid by sol - gel process. The chemical structure was characterized by FT - IR, particle size analyzer and TG - DTA. The results showed that the nanoparticles＇ diameter range in 30 - 50 nm and incorporation of GPTMS leads to improvement of the stability of the composite coating. After the limestone＇s surface was modified with this product, the contact angle of limestone increased from 20°to 93°. The protective performance evaluated with its ability of acid resistance reveals that the protective effects are satisfied.

关 键 词：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 

分 类 号：TQ630.7[化学工程—精细化工]