云南民族学院学报(自然科学版)
雲南民族學院學報(自然科學版)
운남민족학원학보(자연과학판)
JOURNAL OF YUNNAN UNIVERSITY OF THE NATIONALITIES
2001年
1期
279-282
,共4页
混合表面活性剂液晶模板%六方介孔相氧化硅%合成
混閤錶麵活性劑液晶模闆%六方介孔相氧化硅%閤成
혼합표면활성제액정모판%륙방개공상양화규%합성
Mixed surfactants%Hexagonal mesoporous silica%Synthesis
利用十六烷基三甲基溴化铵(CTAB)与脂肪胺(C12H25NH2)混合表面活性剂作模板,正硅酸乙脂(TEOS)为硅源,分别在碱性和酸性介质中,合成了具有六方介孔结构的氧化硅分子筛材料.XRD测试表明所合成材料具有高度的长程有序结构;N2吸附等温线展示了材料均一的介孔孔径分布.对反应物配比中混合表面活性剂浓度、碱浓度和酸浓度对产物介孔相结构的影响进行了研究.实验发现当C12H25NH2/Si在0.0060~0.012范围,CTAB/Si在0.24时,均可在两种介质条件下合成出具有典型六方结构的MCM-41和SBA-3:碱性介质中TMAOH/Si=0.144或酸性介质中HCl/Si=4~10时为较佳的酸碱合成条件.
利用十六烷基三甲基溴化銨(CTAB)與脂肪胺(C12H25NH2)混閤錶麵活性劑作模闆,正硅痠乙脂(TEOS)為硅源,分彆在堿性和痠性介質中,閤成瞭具有六方介孔結構的氧化硅分子篩材料.XRD測試錶明所閤成材料具有高度的長程有序結構;N2吸附等溫線展示瞭材料均一的介孔孔徑分佈.對反應物配比中混閤錶麵活性劑濃度、堿濃度和痠濃度對產物介孔相結構的影響進行瞭研究.實驗髮現噹C12H25NH2/Si在0.0060~0.012範圍,CTAB/Si在0.24時,均可在兩種介質條件下閤成齣具有典型六方結構的MCM-41和SBA-3:堿性介質中TMAOH/Si=0.144或痠性介質中HCl/Si=4~10時為較佳的痠堿閤成條件.
이용십륙완기삼갑기추화안(CTAB)여지방알(C12H25NH2)혼합표면활성제작모판,정규산을지(TEOS)위규원,분별재감성화산성개질중,합성료구유륙방개공결구적양화규분자사재료.XRD측시표명소합성재료구유고도적장정유서결구;N2흡부등온선전시료재료균일적개공공경분포.대반응물배비중혼합표면활성제농도、감농도화산농도대산물개공상결구적영향진행료연구.실험발현당C12H25NH2/Si재0.0060~0.012범위,CTAB/Si재0.24시,균가재량충개질조건하합성출구유전형륙방결구적MCM-41화SBA-3:감성개질중TMAOH/Si=0.144혹산성개질중HCl/Si=4~10시위교가적산감합성조건.
Hexagonal mesoporous silica MCM- 41 and SBA- 3 were synthesized in basic or acidic medium by using mixed surfactants cetyltrimethy lammonium bromide and n- dodecylamine. X- ray diffraction and N2 adsorption isotherm showed that the synthesized silica exhibited a well - ordered hexagonal pore structure and mesopous pore size distributions. The effects of TMAOH/Si on the structural properties of the MCM-41 and HCl/Si on the SBA- 3were investigated. It was found that the hexagonal mesoporous silica can be formed with lower molar ratio of mixed surfactants to silica from 0.2460 to 0.264.