Study of the effect of porogen amount on formation of uniform polystyrene hollow particles prepared by SPG membrane emulsification technique

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	Study of the effect of porogen amount on formation of uniform polystyrene hollow particles prepared by SPG membrane emulsification technique
	Ma, G. H. ; Su, Z. G. ; Omi, S.
	2004
会议名称	Conference on Polymer Colloids - Preparation and Properties of Aqueous Polymer Dispersions
会议日期	JUL 14-19, 2002
会议地点	Kloster Irsee, GERMANY
关键词	hollow particle SPG membrane emulsification hexadecane polystyrene methacrylate) composite microspheres polymer particles morphology emulsion size
期号	124
页码	138-142
中文摘要	Uniform polystyrene (PSt) hollow particles were prepared by combining a Shirasu porous glass (SPG) emulsification technique and a subsequent suspension polymerization process. The oil phase mainly containing St, hydrophilic monomer, hexadecane (HD), and initiator, was pressed through the uniform pores of a SPG membrane into the continuous phase to form uniform droplets. Then, the droplets were polymerized at 70 degreesC. HD was used as a porogen for formation of hollow particles. The amount of HD was varied in order to clarify the formation mechanism. It was found that rapid phase separation between HD and PSt in the initial stage of polymerization was responsible for the formation of hollow particle. When HD amount was low, rapid phase separation was induced by the rapid diffusion of monomer into the aqueous phase. This is because a large amount of new particles occurred, which sucked up greedily monomer from the aqueous phase. On the other hand, when HD amount was high, rapid phase separation was promoted by a large amount of HD, even secondary nucleation was prevented by increasing HD.
收录类别	CPCI
会议网址	://WOS:000222494600029
会议录	AQUEOUS POLYMER DISPERSIONS 丛书: PROGRESS IN COLLOID AND POLYMER SCIENCE
会议录出版者	Springer-Verlag Berlin
语种	英语
内容类型	会议论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/5023]
专题	过程工程研究所_生化工程国家重点实验室
推荐引用方式 GB/T 7714	Ma, G. H.,Su, Z. G.,Omi, S.. Study of the effect of porogen amount on formation of uniform polystyrene hollow particles prepared by SPG membrane emulsification technique[C]. 见:Conference on Polymer Colloids - Preparation and Properties of Aqueous Polymer Dispersions. Kloster Irsee, GERMANY. JUL 14-19, 2002.://WOS:000222494600029.