He Gaohong   

Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates

Title : Director of R & D Center of Membrane Science and Technology

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Language:English

Paper Publications

Title of Paper:乳化液膜法制备草酸锌微细颗粒

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Date of Publication:2007-08-25

Journal:化工进展

Included Journals:PKU、ISTIC、CSCD

Volume:26

Issue:8

Page Number:1159-1165

ISSN No.:1000-6613

Key Words:乳化液膜;草酸锌;微细颗粒;氧化锌

Abstract:采用乳化液膜法制备出草酸锌微细颗粒,乳化液膜体系以煤油为油相,以含量高于95%的二-(2-乙基己基)磷酸酯为载体,选取丁二酰亚胺类表面活性剂T155为膜相稳定剂,内、外水相分别为草酸和硝酸锌溶液,外水相Zn2+透过膜相与内水相草酸结合生成草酸锌微细颗粒.反应在40min时基本平衡,Zn2+萃取率达到90%.实验考察了反应条件对产物粒径的影响,研究表明,粒径随表面活性剂用量的增加、油水比(O/A)的增大而减小,外水相Zn2+浓度的降低可以有效地减小颗粒的粒径.TG、SEM和XRD分析证明合成产物是含两个结晶水的均匀草酸锌颗粒.将制得样品在500℃下煅烧2 h得到粒径均匀的六方纤锌矿晶系ZnO颗粒.

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