以PS为模板的RF气凝胶空心微球制备

Fabrication of Resorcin-Formaldehyde Aerogel Hollow Microspheres Using Polystyrene as Template

采用聚苯乙烯(PS)空心微球为模板,间苯二酚/甲醛(RF)为前驱体溶液,邻苯二甲酸二丁酯为分散剂,以界面聚合反应为基础合成PS-RF核壳双层球,用丙酮去除模板,制得RF空心微球。分别采用红外光谱、X光显微分析、透射电镜(TEM)、N2吸附-脱附和原子力显微分析,对RF空心微球成分、形貌、孔径、表面粗糙度等进行表征。结果表明:RF为单层空心球壳,具有典型的气凝胶多孔结构,由粒径约为10 nm且粒度分布较为均匀的纳米粒子构成,平均孔径约为17 nm,球形度和同心度达到95%以上,表面光洁度小于10 nm,达到了快点火靶的基本要求。

Based on interfacial polymerization reaction, PS-RF double shell microspheres were synthesized by using polystyrene （PS） hollow microspheres as template, RF as precursory solution and dibutyl phthalate as dispersant. Then basing on the former step, RF hollow microsphere was cranked out through throwing off template, which was done through acetone. The component, morphology, aperture, and surface roughness of RF hollow microsphere were characterized by infrared spectrum, X-ray, TEM, AFM and nitrogen adsorption-desorption, respectively. The results show that RF hollow microsphere is monolayered hollow sphere, and has a typical structure of the porous aerogel, and consists of particle size about 10 nm and uniform particle size distribution of nano-particles pose, and its average aperture is about 17 nm. The sphericity and con- centricity of the monolayer hollow microsphere are higher than 95%, and the surface finish is less than 10 nm, which satisfies all the requirement of instant-lighted firebrand.