Gemini作模板剂制备尺寸可控的二维介孔二氧化硅  

Manufacture of Size Controllable Two-dimensional Mesoporous Silica via the Self-assembly of Gemini Surfactants

作　　者：陈思[1] 吴东清[1] 宋春芃[1] 梁海伟[1] 苏跃增[1] 

机构地区：[1]上海交通大学航空航天学院,上海200240

出　　处：《材料导报》2013年第12期47-52,共6页Materials Reports

基　　金：国家973计划项目(2012CB933404);国家自然科学基金(21174083;21102091);BASF上海浦江人才计划(11PJ1405400);国家教育部"博士点"基金(20110073120039)

摘　　要：合成不同联接链长度(s=2,4,6)和不同烷基链长度(m=8,12,16)两个系列的m-s-m型Gemini阳离子表面活性剂作模板剂,采用氧化石墨烯作基底,正硅酸四乙酯作硅源,利用不同Gemini在碱性条件下组装形成的胶束不同,得到一系列氧化石墨烯基二维介孔二氧化硅复合材料(GOMS)。这种材料具有较大的比表面积,可作为模板进一步制备其他多种材料的大比表面积的二维材料。实验结果表明,使用Gemini均可在氧化石墨烯基底上形成二氧化硅介孔,且表面活性剂的联接链和烷基链的长度会影响孔径尺寸,烷基链越长,得到的材料孔径越大,联接链越长,孔径反而越小,通过控制表面活性剂可以得到孔径在一定范围内可控的二维介孔模板,这不仅可以拓宽前驱体材料的选择范围,还可在一定程度上调控材料的应用性能。Two series of Gemini surfactants with various spacer lengths （s=2, 4, 6） and chain lengths （m=8, 12, 16） were synthesized. Two sets of two-dimensional graphene oxide-based mesoporous silica （CK）MS） were prepared using graphene oxide as substrate, tetraetylorthosilicate （TEOS） as silicon source, and using different Gemini surfactants as templates. The materials have high specific surface area, which makes them perfect templates to fabricated different kinds of functional materials which have two-dimensional structure and high specific surface area. Experiments show that GOMS were successfully prepared, and that the pore size can be affected by the spacer length as well as the chain length of Gemini surfactants. Specifically, the pore size decreases with the spacer length increase, and the pore size increase with the increase of chain length. A series of GOMS with controllable pore size within a certain range can be obtained through different kinds of Gemini surfactants, which not only can extend the option boundary of the precursors, but can also make the control of application performance of materials, within a certain range, become possible.

关 键 词：GEMINI型表面活性剂 石墨烯 二维 介孔 模板 

分 类 号：O69[理学—化学]