Preparation of micrometersized mesoporous silica spheres assisted by methyl cellulose

ZHANG Zhiteng; YANG Liming; WANG Yujun; LUO Guangsheng; DAI Youyuan

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Preparation of micrometersized mesoporous silica spheres assisted by methyl cellulose

更新时间：2025-12-10

- Preparation of micrometersized mesoporous silica spheres assisted by methyl cellulose
- CIESC Journal Issue 10, Pages: 2638-2643(2008)
- 作者机构：
  
  清华大学化学工程系化学工程国家重点联合实验室
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- Online First：05 October 2008，
  
  Published：05 October 2008
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ZHANG Zhiteng, YANG Liming, WANG Yujun, et al. Preparation of micrometersized mesoporous silica spheres assisted by methyl cellulose[J]. CIESC Journal, 2008, (10): 2638-2643.
DOI：

ZHANG Zhiteng, YANG Liming, WANG Yujun, et al. Preparation of micrometersized mesoporous silica spheres assisted by methyl cellulose[J]. CIESC Journal, 2008, (10): 2638-2643. DOI：

摘要

通过调节硅酸四乙酯（TEOS）和嵌段聚合物F127（EO106PO70EO106）体系的pH值调控TEOS水解的速度，并利用甲基纤维素（MC）在水热条件下形成网格状液晶微滴结构的特点，一步诱导硅胶初级粒子聚沉制备微米级介孔氧化硅微球。研究了溶胶凝胶的温度、pH值对成球性和孔结构的影响，通过氮吸附（BET），X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、马尔文激光粒度分析（Malven）等手段分析表征了介孔氧化硅微球的形貌和孔结构，实验结果表明通过向TEOS和F127体系中加入MC，在pH＝1、80℃条件下一步水热晶化可以合成直径在4～6 μm、比表面积为450 m2·g-1、孔径为4.2 nm的介孔氧化硅微球。

Abstract

Based on the methyl cellulose’s (MC) function of forming liquid crystal in aqueous solution

the micrometersized mesoporous silica spheres with good dispersivity were synthesized in one step by adding MC into the aqueous solution containing F127 and TEOS (tetraethyl orthosilicate) with the appropriate pHThe effects of temperature and pH were investigatedIt was found that in suitable synthesis condition (pH=1 and 80℃ of hydrothermal temperature) mesoporous silica spheres possessing 4.2 nm of pores diameter

450 m2·g-1 of specific area and 4—6 μm of particle diameter were synthesized.

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