摘要
以甲苯二异氰酸酯与双(三乙氧基硅丙基)胺反应生成的多官能团硅氧烷和正硅酸乙酯为前驱体,采用溶胶-凝胶法以乙醇为溶剂、醋酸为催化剂进行共水解,将得到的溶胶成膜,得到有机/无机杂化涂层。对涂层的一些力学性能(铅笔硬度、耐磨性和附着力等)进行测试,并用红外光谱和热失质量分别对涂层的化学组成及热性能进行了表征。结果表明:当S iO2含量为8.5%时,杂化涂层的力学性能达到一个较佳值,其溶胶的离心稳定性和杂化涂层的耐水性及热稳定性优异。
A multifunctional siloxane was synthesized by the reaction between toluene diisocynates and bis - （3 - [ triethoxysilyl ] - propyl） - amine. An anti - scratch organic - inorganic hybrid coating has been prepared by the casting of the solution which was obtained by the co - hydrolysis of the muhifunctional siloxane and tetraethylorthosilicatc （TEOS） by sol-gel method,with ethanol as the solvent and acetic acid as the catalyst. The mechanical properties of the coatings including pencil hardness, adhesion and anti - scratch properties were measured. The chemical composition of the coatings was characterized by infrared spectra, and its thermal property was characterized by thermal gravity analysis respectively. The results indicate that the organic-inorganic coating has good mechanical properties when the content of SiO2 is 8.5% , and its water resistance, centrifugal stability and thermal stability are excellent.
出处
《涂料工业》
CAS
CSCD
2007年第6期9-12,共4页
Paint & Coatings Industry
关键词
耐刮伤
有机/无机杂化涂层
溶胶-凝胶法
力学性能
scratch resistance
organic/inorganic hybrid coatings
sol-gel method
mechanical properties
