陶瓷膜射流法制备单分散异辛烷/甲酰胺乳液的研究  

Monodispersed Isooctane/Formamide Emulsion Prepared by Ceramic Membrane Jet-Flow Emulsification

作　　者：薛业建[1] 景文珩[1] 李卫星[1] 邢卫红[1] 徐南平[1] 

机构地区：[1]南京工业大学膜科学技术研究所教育部省部共建材料化学工程重点实验室,江苏南京210009

出　　处：《高校化学工程学报》2007年第3期534-537,共4页Journal of Chemical Engineering of Chinese Universities

基　　金：国家基础研究计划(2003CB615707);国家自然科学基金(NNSFC20436030);江苏省自然科学基金(BK2006566);国家863项目(2006AA03Z534)

摘　　要：乳液模板法是制备高度有序多孔材料的重要方法之一。采用二次陶瓷膜乳化在射流条件下制备单分散乳液的方法成功制备出一种非水乳液模板。一次射流过程采用平均孔径为0.2μm的ZrO2陶瓷膜作为乳化介质,二次射流乳化过程采用平均孔径为1.6μm的α-Al2O3陶瓷膜作为乳化介质。异辛烷/甲酰胺体系为研究对象,三嵌段高分子聚（乙二醇）-聚（丙二醇）-聚（乙二醇）作为乳化剂,制备出平均粒径在1-2μm的单分散乳液模板,并考察了操作压力、异辛烷浓度对液滴粒径及粘度的影响。Emulsion template is an important tool for the preparation of ordered porous material. In this paper, a novel method of monodispersed emulsion template preparation by using two-stage ceramic membrane jet-flow emulsification was proposed. Two submerged ceramic membrane emulsification apparatuses were used in series, a ZrO2 membrane with pore size of 0.2 μm was used in the first stage and an α-Al2O3 membrane with pore size of 1.6μm was used in second stage. The continuous phase used was formamide, the dispersed phase was isooctane and the poly（ethylene glycol）-poly（propylene glycol）-poly（ethylene glycol） was used as surfactant in this process. The mean particle sizes of the emulsions obtained by the proposed method are from 1μm to 2μm, and the emulsion has excellent stability and monodispersity within 16 hours. It was found that the mean droplet size and viscosity of the emulsion prepared will increase with the increase of transmembrane pressure and concentration of isooctane.

关 键 词：膜乳化 乳液模板 射流 稳定性 

分 类 号：TQ027.35[化学工程] O648.23[理学—物理化学]