物理化学学报 >> 2008, Vol. 24 >> Issue (03): 492-496.doi: 10.3866/PKU.WHXB20080325

研究论文 上一篇    下一篇

巯丙基功能化介孔纳米二氧化硅的合成

马雪慧; 赵彦保; 肖高峰; 吴志申   

  1. 河南大学特种功能材料重点实验室, 河南 开封 475004
  • 收稿日期:2007-09-24 修回日期:2007-11-05 发布日期:2008-03-10
  • 通讯作者: 赵彦保 E-mail:zhaoyb902@henu.edu.cn

Synthesis of Mercaptopropyl Functionalized Nanosized Mesoporous Silica

MA Xue-Hui; ZHAO Yan-Bao; XIAO Gao-Feng; WU Zhi-Shen   

  1. Key Laboratory of Special Functional Materials, Henan University, Kaifeng 475004, Henan Province, P. R. China
  • Received:2007-09-24 Revised:2007-11-05 Published:2008-03-10
  • Contact: ZHAO Yan-Bao E-mail:zhaoyb902@henu.edu.cn

摘要: 用三种不同的方法将巯基丙基三甲氧基硅烷(MPTMS)引入二氧化硅网络中, 合成了粒径为50-200 nm的巯丙基功能化的介孔纳米二氧化硅, 并利用透射电子显微镜, 热重分析等手段对其形貌与性能进行了表征. 在巯丙基官能团的作用下介孔纳米二氧化硅的形貌发生了重大改变, 由非常规则的六角形变为纳米棒. 控制反应时间可以调节介孔纳米二氧化硅的粒径大小, 用三乙醇胺代替氢氧化钠可以合成直径在100 nm以下的功能化介孔二氧化硅粒子. 为了保护巯基官能团, 选用了酸醇提取法去除模板. 另外, 对介孔二氧化硅粒子的形成机制也进行了探讨.

关键词: 介孔二氧化硅, 巯基功能化, 胶体悬浮液

Abstract: Thiol-functionalized nanosized mesoporous silica particles with a diameter of 50-200 nm were prepared and characterized by TEM, TG, and DTA. (3-mercaptopropyl) trimethoxy silane (MPTMS) was introduced into the silica networks through three synthesis routes. The mercapto group induces significant changes in the particle morphology, transforming highly ordered hexagonal particles into nanoscale bars. The size of mesoporous silica can be adjusted by controlling reacting time. The addition of triethanolamine instead of NaOH leads to the formation of functionalized spherical particles having a diameter of ca 100 nm. The template can be extracted by HCl-ethanol solution for protecting thiol functional group. In addition, the formation mechanism of the mesoporous silica particles was also discussed.

Key words: Mesoporous silica, Thiol-functionalization, Colloidal suspension

MSC2000: 

  • O643