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[1]柏正武,徐小琴,金芬芬,等.纤维素二氧化硅复合颗粒的制备与表征[J].武汉工程大学学报,2013,(02):11-15.[doi:103969/jissn16742869201302003]
　BAI Zheng wu,XU Xiao qin,JIN Fen fen,et al.Preparation and characterization of celluloseSiO2 composite beads[J].Journal of Wuhan Institute of Technology,2013,(02):11-15.[doi:103969/jissn16742869201302003]
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纤维素二氧化硅复合颗粒的制备与表征()
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2013年02期
页码:
11-15
栏目:
化学与化学工程
出版日期:
2013-02-28

文章信息/Info

Title:
Preparation and characterization of celluloseSiO2 composite beads
文章编号:
16742869(2013)02001105
作者:
柏正武1; 2; 徐小琴1;  金芬芬1; 陈伟1*
1.武汉工程大学化工与制药学院，湖北 武汉 430074；2.绿色化学过程教育部重点实验室，湖北 武汉430074
Author(s):
BAI Zhengwu1; 2; XU Xiaoqin1; JIN Fenfen1; CHEN
1. School of Chemical Engineering and Pharmacy,Wuhan Institution of Technology, Wuhan430074,China;2. The Key Laboratory of Green Chemical Process of?the Ministry of Education, Wuhan 430074，China
关键词:
纤维素; SiO2; 复合颗粒; 溶胶凝胶法; 制备工艺
Keywords:
cellulose;  SiO2;  composite beads;  solgel method; preparation technique
分类号:
TB332
DOI:
103969/jissn16742869201302003
文献标志码:
A
摘要:
探索了可用作色谱填料的纤维素SiO2复合颗粒的制备方法，将纤维素和硅胶溶于NaOH/尿素体系中，得到纤维素SiO2溶液，用溶胶凝胶转相法制得复合颗粒.研究了乳化剂用量、搅拌转速、纤维素分子量以及纤维素和SiO2的投料比对所制备的复合颗粒粒径和形貌的影响，以扫描电镜、粒径分析等对复合颗粒进行了表征.发现粘度小的分散相和分子量小的纤维素适合制备粒径大的复合颗粒，反之亦然.当纤维素与SiO2的投料比大于3∶1时，复合颗粒呈球形，小于3∶1时，多数颗粒的形状为无定形；当乳化剂Span 80的用量为10%，搅拌转速为600 r/min时，复合颗粒的形状较规则.在不同的条件下，所制备颗粒的体积平均粒径为9~45 μm，比表面积在110~480 m2/g之间.调节乳化剂用量、搅拌转速、纤维素分子量以及纤维素与SiO2的投料比，能制备径适当、比表面积大的复合颗粒，这些颗粒具有介孔结构，且孔径分布较均匀，机械强度高，适合用作色谱分离填料.
Abstract:
The aim of the present work is todevelop a method to prepare celluloseSiO2composite beads, which can be used aschromatographic packing materials. Thus, cellulose?and silica gel were dissolved in an aqueous?solution of NaOH/urea, and then celluloseSiO2?composite beads were prepared by a solgel?method. The influence of the fed amount of the?emulsifier, the stirring speed, the molecular?weight of cellulose and the fed ratio of cellulose?and SiO2 on the particle size and the morphology?of celluloseSiO2 beads were studied. The?composite beads were characterized by scanning?electron microscopy, particle size analysis etc.

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备注/Memo

备注/Memo:
收稿日期：20121204基金项目：国家自然科学基金项目（50973086）作者简介：柏正武（1963），男，安徽南陵人，教授，博士，博士研究生导师. 研究方向：手性分离材料.*
更新日期/Last Update: 2013-04-16