CO2/N2开关型脒基表面活性剂软模板制备介孔二氧化硅

doi:10.16085/j.issn.1000-6613.2015.12.028

化工进展 ›› 2015, Vol. 34 ›› Issue (12): 4305-4309,4323.DOI: 10.16085/j.issn.1000-6613.2015.12.028

CO₂/N₂开关型脒基表面活性剂软模板制备介孔二氧化硅

代利, 郑饶君, 马宇萱, 蒋建中, 崔正刚

江南大学化学与材料工程学院, 江苏无锡 214122

收稿日期:2015-03-16 修回日期:2015-06-18 出版日期:2015-12-05 发布日期:2015-12-05
通讯作者: 蒋建中,副教授,硕士生导师。E-mailj.z.jiang@hotmail.com。
作者简介:代利(1989—),男,硕士研究生。
基金资助:
国家自然科学基金(20901032,21473080)及江苏省六大人才高峰计划项目。

Synthesis of mesoporous silica using CO₂/N₂ switchable surfactant as soft templates

DAI Li, ZHENG Raojun, MA Yuxuan, JIANG Jiangzhong, CUI Zhenggang

School of Chemical & Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China

Received:2015-03-16 Revised:2015-06-18 Online:2015-12-05 Published:2015-12-05

摘要/Abstract

摘要： 模板法是制备介孔SiO₂的常用方法之一,而模板法通常需要脱除模板后才能得到介孔结构。以传统表面活性剂为模板合成介孔二氧化硅,除模板方法还有高温焙烧、溶剂萃取等,但这些方法均存在一定的缺点,如导致结构坍塌、消耗大量溶剂等。本文采用开关型表面活性剂N'-十二烷基-N,N-二甲基乙基脒碳酸氢盐为模板剂,以正硅酸四乙酯(TEOS)为硅源在碱性条件下合成SiO₂。与常规除模板法不同,本实验在反应结束后加热并通入N₂使表面活性剂分解失去表面活性,用水和丙酮洗涤后得到了形貌规整、孔道有序、具有较高比表面积和孔容的介孔SiO₂。同时还研究了有机盐乙二胺四乙酸二钠(Na₂EDTA)对介孔有序度、所得介孔材料比表面积、孔容孔径和模板残留量的影响。

关键词: 表面活性剂, 介孔, 二氧化硅, 模板剂, 二氧化碳

Abstract: Template method is used widely to synthesize mesoporous silica. However,the mesoporous structure can be obtained only after the templates are removed. Calcination,solvent extraction etc. are frequently used to remove conventional surfactant templates. However,these template removal methods could bring problems such as resulting structure collapse or massive consumption of solvent. In this paper,we synthesized silica using switchable surfactant of N'-dodecyl-N,N-dimethylacetamidinium bicarbonate as templates and tetraethoxysilane (TEOS) as silicon source in alkaline solution. Compared to conventional template removal method,the switchable surfactants decomposed and lost its surface activity by heating the mixture together with N₂ injection when the reaction was completed. Mesoporous silica with uniform morphology,ordered mesopore,large specific surface area and pore volume was then obtained after washed with water and acetone. The effect of Na₂EDTA on the order of mesopore,specific surface area,pore volume,size of pore and templates residue was discussed.

Key words: surfactant, mesoporous, silica, templates, carbon dioxide

中图分类号:

O611.62

代利, 郑饶君, 马宇萱, 蒋建中, 崔正刚. CO₂/N₂开关型脒基表面活性剂软模板制备介孔二氧化硅[J]. 化工进展, 2015, 34(12): 4305-4309,4323.

DAI Li, ZHENG Raojun, MA Yuxuan, JIANG Jiangzhong, CUI Zhenggang. Synthesis of mesoporous silica using CO₂/N₂ switchable surfactant as soft templates[J]. Chemical Industry and Engineering Progree, 2015, 34(12): 4305-4309,4323.

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CO₂/N₂开关型脒基表面活性剂软模板制备介孔二氧化硅

Synthesis of mesoporous silica using CO₂/N₂ switchable surfactant as soft templates

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