间苯二酚-甲醛气凝胶空心微球制备技术
Preparation of resorcinol-formaldehyde aerogel hollow microspheres
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摘要: 采用微流体注射成型技术，以邻苯二甲酸二丁酯为内外油相，间苯二酚/甲醛(RF)溶液为水相，经过溶胶-凝胶、溶剂交换、超临界干燥等过程制备出了RF气凝胶空心微球。分别采用红外光谱、光学显微镜、X光显微分析、透射电镜(TEM)、N2吸附-脱附，对RF空心微球成分、形貌、孔径、直径分布等进行表征。结果表明：RF为单层空心微球，具有典型的气凝胶多孔结构，由粒径为10 nm左右、且粒度分布较为均匀的纳米粒子构成,平均孔径为20 nm左右,球形度和同心度大于95%，微球直径分布在550～750 mm，最大可达到800 mm，达到了快点火靶的基本要求。
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关键词:
- 惯性约束聚变靶 /
- 间苯二酚-甲醛气凝胶空心微球 /
- 微流体注射成型 /
- 溶胶-凝胶
Abstract: Based on the technique of micro fluid injection molding, RF hollow microspheres were synthesized by using dibutyl phthalate as oil phase, RF solution as water phase, and by sol-gel, solvent exchanging and supercritical drying. The components, morphology, aperture, and diameter distribution of RF hollow microspheres were characterized by infrared spectrum, X-ray micro analysis, TEM, and nitrogen adsorption-desorption respectively.The results show that RF hollow microsphere is monolayered and has a typical structure of the porous aerogel. The pores are consisting of nearly uniform nano-particles about 10 nm in diameter, and their average aperture is about 20 nm. The sphericity and concentricity of the monolayer hollow microsphere is higher than 95%, the diameter distribution of RF hollow mic -
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