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	Phase Separation Behavior of Cocamidopropyl Betaine/Water/Polyethylene Glycol System
	You Xiaoyan ; Qin Wei ; Dai Youyuan
	2010-10-12 ; 2010-10-12 ; OCT
关键词	phase behavior cocamidopropyl betaine polyethylene glycol CLOUD-POINT EXTRACTION LIQUID-LIQUID-EXTRACTION ANIONIC SURFACTANT TRANSFORMATION Engineering, Chemical
中文摘要	Phase separation behavior of cocamidopropyl betaine/water/polyethylene glycol (PEG) system was studied. The effects of concentration and molecular weight of PEG on the phase separation behavior were investigated. Clouding occurred when the concentration of PEG was large enough in the betaine aqueous solution, and the concentration of PEG at cloud point decreased with the increase of PEG molecular weight for a constant betaine concentration. The bottom phase was the PEG-rich phase, and the upper phase was the betaine-rich phase. The volumetric ratio of PEG-rich phase to betaine-rich phase, at the same difference between the PEG concentration and the one at the cloud point, Delta C-cp (0.1 g.ml(-1)), decreased as the PEG molecular weight increased and approached 1 for higher PEG molecular weight (about 20000), which was similar to the typical aqueous two-phase system. This volumetric ratio depended on the initial PEG concentration, but independent of PEG molecular weight. The concentration ratio of betaine to PEG in both phases depended on the Delta C-cp, independent of PEG molecular weight. Keywords phase behavior, cocamidopropyl betaine, polyethylene glycol
语种	英语 ; 英语
出版者	CHEMICAL INDUSTRY PRESS ; BEIJING ; NO. 3 HUIXINLI CHAOYANGQU, BEIJING 100029, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79442]
专题	清华大学
推荐引用方式 GB/T 7714	You Xiaoyan,Qin Wei,Dai Youyuan. Phase Separation Behavior of Cocamidopropyl Betaine/Water/Polyethylene Glycol System[J],2010, 2010, OCT.
APA	You Xiaoyan,Qin Wei,&Dai Youyuan.(2010).Phase Separation Behavior of Cocamidopropyl Betaine/Water/Polyethylene Glycol System..
MLA	You Xiaoyan,et al."Phase Separation Behavior of Cocamidopropyl Betaine/Water/Polyethylene Glycol System".(2010).

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