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고순도로 합성된 나노콜로이드 티타늄옥사이드의 BN 파우더 코팅에 관한 연구
장혜인 ( Hyein Jang ),이경철 ( Kyungchul Lee ),홍성호 ( Sungho Hong ),지홍근 ( Hongkeun Ji ),이승화 대한화장품학회 2002 대한화장품학회지 Vol.28 No.1
High concentrated TiO<sub>2</sub> nano colloids were synthesized by sol-gel method. Reactions were performed in TiCI<sub>4</sub>/HCI/H<sub>2</sub>O aqueous solution and the conditions of particles such as shape, size and aggregation, etc. were controlled by polymerization and adsorption of acrylamide in surface of TiO<sub>2</sub> nano particles. And also, aminopropyltriethoxysilane was added instead of acrylamide and compared each other. The prepared colloids were well dispersed and showed the strong absorption peaks at 350nm-370nm which is blue shifted to 20-30nm, compared to macro particles. The obtained techniques from TiO<sub>2</sub> nano colloids synthesis were utilized in coating on boron nitride powders which are nonpolar and isoelectronic materials of carbon. Their surface morphology, structure, thermal stability and U.V absorption characteristics were examined by SEM(Scanning Electron Microscopy), XRD(X-ray diffraction), TG/DTA(Thermogravimetric and Differential Thermal Analysis), UV-VIS(Ultraviolet- Visible Spectroscopy).corresponding auther(e-mail:shlee6914@hanmail.net)