有机玻璃表面紫外光固化含硅杂化涂层的制备及性能研究  

Preparation and Properties of UV-Curing Hybrid Coating Containing Silicon on the Surface of PMMA

作　　者：程显为 陈遒[1] 来国桥[1] 

机构地区：[1]杭州师范大学有机硅化学及材料技术教育部重点实验室,浙江杭州311121

出　　处：《杭州师范大学学报（自然科学版）》2015年第1期21-26,共6页Journal of Hangzhou Normal University(Natural Science Edition)

摘　　要：用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)和正硅酸乙酯(TEOS)制备了一种可紫外光固化的硅溶胶,将硅溶胶与UV活性稀释剂等混合,进一步制备了可紫外光(UV)固化的有机-无机杂化涂料,并在有机玻璃表面制得涂层.用抽提法研究了杂化涂料的光固化程度,采用傅立叶红外光谱仪(FT-IR)、扫描电镜(SEM)、热失重仪(TG)和紫外光谱仪(UV-vis)等,对杂化涂料及涂层的结构和性能进行了表征.结果表明:硅溶胶与通用的光固化树脂混合后均匀透明,有很好的相容性,在有机玻璃(PMMA)表面经紫外光(UV)固化后形成均匀致密的透明涂层,当涂料中硅溶胶的比例为20%时,涂层的硬度高达8H,体积收缩率比未添加硅溶胶的光固化树脂涂层减小了51%,耐磨性提高了61%.The UV-curing silica sol is prepared with γ- methacryloxypropyl trimethoxylsilane （KH570） and tetraethyl orthosilicate（TEOS）. The organic-inorganic hybrid UV curing coating on the surface of PMMA is prepared further after mixing silica sol with UV reactive diluents. The UV-curing degree is studied by extraction method, and the structure and properties are characterized through Fourier transformer infrared spectra （FT IR）, scanning electron microscope （SEM）, thermogravimetric analysis（TGA） and UV-vis spectroscopy（UV vis）. The results show that after silica sol mixes with the UV-curing resin, the mixture is transparent with excellent compatibility. The transparent film with uniform density can be formed on the surface of PMMA after exposures to UV light. When silica sol content is 20%, the coating hardness reaches 8H, the volume shrinkage rate decreases 51%, and the abrasion-resistant property of the film increases 61%, compared with the coating films without silica sol.

关 键 词：硅溶胶 光固化 有机玻璃 有机-无机杂化涂料 

分 类 号：O627.41[理学—有机化学]