高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (6): 1309.doi: 10.7503/cjcu20130106

• 研究论文: 无机化学 • 上一篇    下一篇

二元阴阳离子表面活性剂法合成介孔氧化硅囊泡

牟鸣薇1, 彭策2, 王颂2, 金春阳1, 曹献英1, 蔡强2   

  1. 1. 海南大学材料与化工学院, 海口 570228;
    2. 清华大学材料科学与工程系, 北京 100084
  • 收稿日期:2013-01-30 出版日期:2013-06-10 发布日期:2013-04-08
  • 通讯作者: 曹献英,女,博士,研究员,博士生导师,主要从事生物材料方面的研究.E-mail:cxying_02@163.com;蔡强,男,博士,教授,主要从事介孔材料的合成及其形貌控制研究.E-mail:caiqiang@mail.tsinghua.edu.cn E-mail:cxying_02@163.com;caiqiang@mail.tsinghua.edu.cn
  • 基金资助:

    国家"九七三"计划项目(批准号: 20131970096)资助.

Synthesis and Characterization of Mesoporous Silica Vesicles Using Cationic-anionic Binary Surfactant as Template

MU Ming-Wei1, PENG Ce2, WANG Song2, JIN Chun-Yang1, CAO Xian-Ying1, CAI Qiang2   

  1. 1. College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China;
    2. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2013-01-30 Online:2013-06-10 Published:2013-04-08

摘要:

以十二烷基磺酸钠(SDS)和十六烷基三甲基溴化铵(CTAB)为表面活性剂, 在SDS与CTAB的摩尔比为1.0~2.3时, 以正硅酸乙酯(TEOS)为硅源, 在氨水-水体系中于68℃下合成介孔氧化硅囊泡. 通过透射电子显微镜(TEM)、 X射线衍射仪(XRD)、 热重分析仪(TGA)和氮气吸附-脱附实验仪对合成的产物进行表征. 结果表明, 合成的产物为介孔氧化硅囊泡聚集体, 孔径约为4 nm, 样品的Brunauer-Emmett-Teller(BET)比表面积为826 m2/g. 对介孔氧化硅囊泡的形成机理做了初步探讨.

关键词: 阴、 阳离子表面活性剂, 介孔材料, 氧化硅, 囊泡

Abstract:

Mesoporous silica vesicles were synthesized using cationic surfactant hexadecyl trimethyl ammonium bromide(CTAB) and anionic surfactants sodium dodecyl sulfonate(SDS) in molar ratios of 1.0-2.3 as templates, tetraethyl orthosilicate(TEOS) as silica source at 68℃ in ammonia solution medium. The samples were characterized by scanning electron microscopy(SEM), small angle X-ray diffraction(SXRD), transmission electron microscopy(TEM), thermo gravimetric analysis(TGA) and nitrogen adsorption-desorption isotherms measurments. The results indicate that the samples are the continue aggregates of mesoporous silica vesicles with diameters of ca. 50 nm. The Brunauer-Emmett-Teller(BET) surface area and nonlocal density functional theory(NLDFT) pore diameter of the samples are 826 m2/g and 4.0 nm, respectively. The formation mechanism of the vesicles was also discussed.

Key words: Anion and cation surfactants, Mesoporous material, Silica, Vesicle

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