固体粒子稳定的乳状液的微波破乳  

Demulsification of solid-stabilized emulsions under microwave

作　　者：夏立新[1] 曹国英[2] 陆世维[2] 刘泉[1] 汪舰[1] 佟胜睿[1] 康笑博[1] 宫科[1] 

机构地区：[1]辽宁大学化学科学与工程学院,辽宁沈阳110036 [2]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《化学研究与应用》2007年第3期304-306,共3页Chemical Research and Application

基　　金：辽宁省科技基金项目(20041027)资助;辽宁省教育厅重大基础研究计划项目(2004C067)资助

摘　　要：Experimental data were presented to show the influence of solid particles on the demulsification.It was found that some solid particles could effectively resist the demulsification and increase the emulsion stability.Results were presented on the effects of the properties of the solid particles on the type and the demulsification of emulsions formed.Water-wet particles stabilize water-external emulsions,while oil-wet particles stabilize oil-external emulsions.The demulsification rate and effectiveness decrease with the mass fractions of particles.Comparing with conwentional heating,microwave radiation could enhance the demulsification rate by an order of magnitude and increase the demulsification effectiveness.For emulsions stabilized by graphite powder,the maximum demulsification effectiveness was up to 82% in 5 min under microwave radiation.However,the maximum demulsification effectiveness was 72% with oil-bath heating at 90 ℃ for 40 min.For emulsions stabilized by barium sulfate,the demulsification efficiencies all reached 100% in a very short time under microwave radiation.The investigation was also carried out on the demulsification of the emulsions stabilized by solid particles in various stearic acid concentrations.Experimental data were presented to show the influence of solid particles on the demulsifieation. It was found that some solid particles could effectively resist the demulsification and increase the emulsion stability. Results were presented on the effects of the properties of the solid particles on the type and the demulsification of emulsions formed. Water-wet particles stabilize waterexternal emulsions, while oil-wet particles stabilize oil-external emulsions. The demulsification rate and effectiveness decrease with the mass fractions of particles. Comparing with conwentional heating, microwave radiation could enhance the demulsificafion rate by an order of magnitude and increase the demulsificafion effectiveness. For emulsions stabilized by graphite powder, the maximum demulsification effectiveness was up to 82% in 5 win under microwave radiation. However, the maximum demulsification effectiveness was 72% with oil-bath heating at 90℃ for40 win. For emulsions stabilized by barium sulfate, the demulsificatlon efficiencies all reached 100% in a very short time under microwave radiation. The investigation was also carried out on the demulsificafion of the emulsions stabilized by solid particles in various stearic acid concentrations.

关 键 词：乳状液 破乳 微波辐射 固体粒子 硬脂酸 

分 类 号：O647.11[理学—物理化学]