紫外光固化聚丙烯酰/SiO2有机/无机杂化气凝胶制备
Synthesis of poly (MPMS-SSO) organic/inorganic hybrid aerogel by ultra-violet cure
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摘要: 采用自制的甲基丙烯酰多羟基倍半硅氧烷制备了UV固化的有机/无机杂化湿凝胶。湿凝胶经CO2超临界干燥后即得到相应的杂化气凝胶，气凝胶经场发射扫描电子显微镜，高分辨透射电镜分析表明：构成气凝胶3维珍珠链结构的骨架的颗粒尺寸为20～30 nm，骨架上具有5～10 nm的孔洞结构，骨架颗粒有机、无机组分间没有明显的相界面。气凝胶的比表面积、吸附特性和微观孔结构采用经典的N2吸附法获得，结果表明气凝胶比表面积为520.9 m2/g，孔洞结构主要由50 nm以下的介孔所构成。Abstract: A procedure of synthesis of organic/inorganic hybrid wetgels derived from methacryloxypropyltrimethoxysilane based silsesquioxane(MPMS-SSO) by ultra-violet ray(UV) cure was demonstrated. Hybrid aerogels were obtained through CO2 supercritical fluid drying process. The as-synthesized aerogels were characterized by field-emission scanning electron microscopy(SEM), high resolution transmission electron microscopy(TEM), Brunauer-EmmettTeler(BET). The field-emission SEM micrograph shows that, the aerogels are made up of 3-D pearlnecklace like tangling networks and the diameters of the backbone particles are of 20~30 nm. The high resolution TEM micrograph indicates that there are some holes with diameters about 5~10 nm in backbone. The BET results reveal that the aerogel specific surface are
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Key words:
- icf target /
- hybrid /
- aerogels /
- uv cure
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