Effect of dispersion medium and dominated evaporation on the pattern formation of colloidal suspension

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	Effect of dispersion medium and dominated evaporation on the pattern formation of colloidal suspension
	Ma WJ(马文杰); Wang YR(王育人); Ma WJ
会议录名称	MACHINERY, MATERIALS SCIENCE AND ENGINEERING APPLICATIONS, MMSE 2011
	2011
页码	732-736
会议名称	2011 International Academic Conference on Machinery, Materials Science and Engineering Applications, MMSE 2011
会议日期	JUL 15-16, 2011
会议地点	Wuhan, China
摘要	We study the effect of dispersion medium and dominated evaporation on the drying process and pattern of thin liquid layer colloidal suspention. Panasonic camera is used to capture the drying process and macroscopic pattern. It is shown that drying patterns are sensitive to the dispersion medium. As the volume ratio of ethanol in aqueous ethanol colloidal suspension increases, the evaporation rate increases, and film in the center becomes smaller and thinner, obvious broad-ring pattern can be observed. We suggest that difference in dispersion medium changes the evaporation rate, which has a direct proportional variation with strength of Marangoni convection. Furthermore, convection strength has great influence on self-assembly of colloid particles and the pattern formation of colloidal suspension. We design two simple experiments to change the evaporation rate and convection strength in order to verify the conclusion above. Broad-ring patterns with spray-like round edge at higher evaporation rate are obtained. Uniform film forms at lower evaporation rate.
关键词	Drying Ethanol Evaporation Liquids Machinery Materials Science Phase Transitions Suspensions (Fluids) Aqueous Ethanol Broad-ring Pattern Colloid Particles Colloidal Suspensions Dispersion Medium Drying Pattern Drying Process Evaporation Rate Macroscopic Pattern Marangoni Convection Panasonic Pattern Formation Thin Liquid Layer Uniform Films Volume Ratio
WOS记录号	WOS:000291967100133
课题组名称	NML空间材料物理力学
ISBN号	978-3-03785-111-1
URL	查看原文
收录类别	CPCI-S ; EI
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46830
专题	微重力重点实验室
通讯作者	Ma WJ
推荐引用方式 GB/T 7714	Ma WJ,Wang YR,Ma WJ. Effect of dispersion medium and dominated evaporation on the pattern formation of colloidal suspension[C]MACHINERY, MATERIALS SCIENCE AND ENGINEERING APPLICATIONS, MMSE 2011,2011:732-736.

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