Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process

doi:10.1016/j.molliq.2019.111127

	Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process
	Liu, Yanrong 1,2; Nie, Yi 1; Pan, Fengjiao 1; Zhou, Le 1; Ji, Xiaoyan 2; Kang, Zhaoqing 1; Zhang, Suojiang 1
刊名	JOURNAL OF MOLECULAR LIQUIDS
	2019-09-01
卷号	289 页码:8
关键词	Ternary phase diagram Cloud point Binodal curve Ionic liquids Cellulose
ISSN号	0167-7322
DOI	10.1016/j.molliq.2019.111127
英文摘要	In this work, the cellulose phase separation behavior was investigated by using ionic liquids (ILs) as novel solvents to acquire a green process for cellulose fiber spinning. The cloud point titration method combined with the turbidity correlation equation was used to obtain the ternary diagram of IL/cellulose/coagulator throughout the whole compositional range. The effects of the type of ILs, the cellulose materials, the kind of coagulators and the regeneration temperatures for cellulose fiber manufacturing process on the phase separation behavior were studied systematically. It was found that the linearized cloud point (LCP) curve correlation fits to experimental data well and can be used to quantify the optimized coagulator, and among the studied cases, the system of [EMIM]DEP, cotton pulp and water with the regeneration temperature at 298.15 K is the best. Meanwhile, COSMO-RS was used to predict the interaction between solvent, cellulose and coagulator, and the comparison with the LCP correlation shows good agreement. The crystal structure of the regenerated cotton pulp was determined with XRD, and the result evidences that the crystal structure of the regenerated cellulose transforms from cellulose I to cellulose II. The crystallinity decreases from 96.0% (raw cotton pulp) to 85.6% after 24 h dissolution in [EMIM]DEP at 363.15 K, and it has a slight deviation from 24 h to 72 h, which illustrates that the spinning process can run continuously at 363.15 K when using [EMIM]DEP as the solvent. (C) 2019 Published by Elsevier B.V.
资助项目	Natural Science Foundation of Beijing Municipality[2182070] ; National Natural Science Foundation of China[21576262] ; National Natural Science Foundation of China[21776276] ; Kempe Foundation
WOS关键词	COSMO-RS ; TERNARY-SYSTEMS ; LIQUID-MIXTURES ; WOOL KERATIN ; CELLULOSE ; DISSOLUTION ; WATER ; BEHAVIOR ; POLYMER ; PREDICTION
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000482247900030
资助机构	Natural Science Foundation of Beijing Municipality ; National Natural Science Foundation of China ; Kempe Foundation
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/30541]
专题	中国科学院过程工程研究所
通讯作者	Nie, Yi; Zhang, Suojiang
作者单位	1.Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst,Inst Proc E, Beijing 100190, Peoples R China 2.Lulea Univ Technol, Div Energy Sci, Energy Engn, S-97187 Lulea, Sweden
推荐引用方式 GB/T 7714	Liu, Yanrong,Nie, Yi,Pan, Fengjiao,et al. Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process[J]. JOURNAL OF MOLECULAR LIQUIDS,2019,289:8.
APA	Liu, Yanrong.,Nie, Yi.,Pan, Fengjiao.,Zhou, Le.,Ji, Xiaoyan.,...&Zhang, Suojiang.(2019).Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process.JOURNAL OF MOLECULAR LIQUIDS,289,8.
MLA	Liu, Yanrong,et al."Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process".JOURNAL OF MOLECULAR LIQUIDS 289(2019):8.