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化学工业与工程
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��ѧ��ҵ�빤�� 2010, Vol. 27 Issue (5) :387-390    DOI:
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Preparation of Silica Nanoparticles from Ethyl Silicate in Reverse Microemulsions
FAN Yan-ling,LIU Yi-fang,LV Xue-li,MENG Fan-cheng,SHI Meng-qi,ZHANG Xiang-lan
School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China
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ժҪ ����NP-5/������/ȥ����ˮ��ϵ�Ʊ�����΢��Һ,�����˸���ϵ����Ԫ��ͼ,��������������(TEOS)Ϊԭ��,�ڼ����������ܿ�ˮ�ⷴӦ�Ʊ�������SiO2����,̽����[n(ˮ)��n(������Լ�)](��R��ʾ)��[n(ˮ)��n(TEOS)](��H��ʾ)��SiO2��������������Ӱ�졣ͨ��ɨ��羵(SEM)�ͼ��������Ƕ���Ʒ��ò�����Ӵ�С�������ֲ������˱����������ʾ:ɨ��羵�¹۲쵽��SiO2����Ϊ�޶������ο���,������200��500 nm�ķ�Χ,���������Ƿ����õ���ƽ����������R��H�����������
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Abstract�� Reverse microemulsion of NP-5 /cyclohexane / water system was prepared,and the ternary phase diagram was drawn.The silica nanoparticles were synthesized by controlling hydrolysis of ethyl silicate(TEOS) in the recerse microemulsion.The effects of H2O /NP-5 molar ratio(R) and H2O /TEOS molar ratio(H) on the size of the resulting silica particles were studied.The morphologies of prepared samples were characterized by SEM,and the size and particle distribution were confirmed by laser granulometry.The results show that the synthesized particles are amorphous sphere silica particles with the size of 200—500 nm.The average particle size of silica determined by laser granulometry is increased with both increasing R and H.
Keywords�� reverse microemulsion   silica nanoparticle   ethyl silicate   preparation     
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������, ���շ�, ��ѩ��, �Ϸ���, ʱ����, ������.��������Ϊԭ�Ϸ���΢��Һ���Ʊ����׶�������[J].  ��ѧ��ҵ�빤��, 2010,27(5): 387-390
FAN Yan-Ling, LIU Yi-Fang, LV Xue-Li , MENG Fan-Cheng, SHI Meng-Qi, ZHANG Xiang-Lan.Preparation of Silica Nanoparticles from Ethyl Silicate in Reverse Microemulsions[J].  Chemcial Industry and Engineering, 2010,27(5): 387-390
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