화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.21, No.6, 1224-1230, November, 2004
DOI10.1007/BF02719498  Export Citation
Rapid Synthesis of Mesoporous Silica by an Accelerated Microwave Radiation Method
Myung-Geun Song1, 2, Jong-Yun Kim3, Sung-Ho Cho1, and Jong-Duk Kim1, †
  • 1Department of Chemical and Biomolecular Engineering, and Center for Energy and Environment Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kuseong-dong, Yuseong-gu, Daejeon 305-701, Korea
  • 2Samsungcorning R&BD Center, 472, Sin-dong, Yeoungtong-gu, Suwon, Gyeonggi-Do 442-732, Korea
  • 3LG Household & Health Care Research Park, #84 Jang-dong, Yuseong-gu, Daejeon 305-343, Korea
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Microwave-hydrothermal processes for the synthesis of mesoporous silica were investigated with different pathways and mixture conditions at 373 K, and the corresponding structures to the hydrothermal method were synthesized within a very short crystallization time. 2-D hexagonally ordered arrays of MCM-41 materials via the direct electrostatic assembly pathway of S+I- and mediated templating pathways of S+X-I+ with CTAB were synthesized, and cubic mesophase of MCM-48 was also prepared within 2 hrs of microwave heating without adding alcohol. Nonionic surfactants with ethylene oxide (EO) moiety as structure-directing agents were used for the preparation of ordered array of hexagonal or cubic mesostructured silica via the charge matching principle of (S0H+)(X-I+). Although the detailed roles of microwaves may differ for each process, microwaves accelerate the formation of multiply charged silicate oligomers, initiating mesophase assembly. Therefore, the use of microwave radiation can transfer energy uniformly and quickly, and complete the syntheses of mesostructured materials within a short time.
Keywords:Mesoporous Silica;Microwave Radiation;Nonionic Surfactant;Dielectric Heating;Rapid Synthesis
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