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UV 경화형 단량체계 실리카 분산체의 점도 특성 및 유변학적 거동
안재범 ( Jae Beon Ahn ),조봉상 ( Bong Sang Cho ),유의상 ( Eui Sang Yoo ),노시태 ( Si Tae Noh ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.2
We made 8 wt% silica dispersion system with fumed silica and photo curable acrylic monomer by beads mill process. These dispersions could be applied in organic/inorganic hybrid coating systems. These dispersions could be applied in organic/inorganic hybrid coating systems. The 4 species of photo curable acrylic monomer which was presence of hydroxyl group, different solubility parameter, and different molecular size were used in the silica dispersions. Stability of polar solvent, isopropyl alcohol, in silica dispersions was investigated. We investigated the stability of silica dispersions by using steady-state and dynamic rheology. As the monomer has hydroxyl group increased in mono and binary monomer silica dispersions, they showed non flocculated stable sol (loss modulus (G``)> storage modulus (G`)). When polar solvent IPA was added into slightly flocculated silica dispersions, they changed to non flocculated stable sol.