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권오윤,박경원,정순영,Gwon, O Yun,Park, Gyeong Won,Jeong, Sun Yeong Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.7
Porous silica-pillared montmorillonites were prepared by simultaneous intercalation of dodecylamine-TEOS [tetraethylorthosilicate, Si(OC2H5)4] into the H-montmorillonite and intragallery amine-catalyzed hydrolysis of TEOS. Mixtures of the H-montmorillonite, dodecylamine and TEOS at molar ratios of 1 : 2 : 15-30 and 1 : 2-6 : 20 resulted to swollen and viscous gel once at room temperature, allowing intercalation compounds which dodecylamine and TEOS were simultaneously intercalated into interlayer of H-montmorillonite. The hydrolysis of the gallery TEOS was conducted in water solution for 40 min at room temperature, affording siloxane-pillared H-montmorillonite. Calcination of samples at 500 $^{\circ}C$ in air resulted in silica-pillared montmorillonite with large specific surface areas between 403 and 577 m2 /g, depending on the reaction stoichiometry. The reaction at H-montmorillonite : dodecylamine : TEOS reaction stoichiometries of 1 : 2 : 15 and 1 : 4 : 20 resulted in high specific surface areas and mesopores with a narrow pore size distribution. Result indicates that the intragallery-amine catalyze the hydrolysis of gallery-TEOS and simultaneously have a role of gallery-templated micellar assemblies.
윤갑구,김왕태,박경원,Yun, Gap-Gu,Kim, Wang-Tae,Park, Gyeong-Won 한국전기기술인협회 2000 電力技術人 Vol.216 No.8
1945년 8.15 해방과 ]]]]] 1945년 8ㆍ15 해방과 동시 한반도는 북위 38도 선을 경계로 하여 DPRK(북한)와 ROK(남한)로 분단되었다. 해방전의 발전설비는 88.5%,평균 발전량은 95.6%, 수요 전력은 86.7%가 북한에 치중되어 있었다.