Solubility of neutral and charged polymers in ionic liquids studied by laser light scattering

被引：57
作者：
Chen, Ye [1 ,2 ,3 ]
Zhang, Yumei [3 ]
Ke, Fuyou [1 ,2 ]
Zhou, Jihan [1 ,2 ]
Wang, Huaping [3 ]
Liang, Dehai [1 ,2 ]
机构：
[1] Peking Univ, Coll Chem & Mol Engn, Minist Educ, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
[2] Peking Univ, Coll Chem & Mol Engn, Minist Educ, Key Lab Polymer Chem & Phys, Beijing 100871, Peoples R China
[3] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Fiber Mat, Shanghai 201620, Peoples R China
来源：
POLYMER | 2011年 / 52卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Ionic liquids; Neutral polymers; Charged polymers; BLOCK-COPOLYMER MICELLES; RHEOLOGICAL BEHAVIOR; SOLVENT-EXTRACTION; CELLULOSE; CHLORIDE; DISSOLUTION; POLYMERIZATION; SOLVATION; DYNAMICS; DILUTE;
D O I：
10.1016/j.polymer.2010.11.034
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The solubility and chain conformation of different types of homopolymers in low viscosity ionic liquids (ILs), 1-allyl-3-methylimidazolium chloride ([AMIM][CI]) at 50 degrees C and 1-butyl-3-methylimidazolium formate ([BMIM][COOH]) at 25 degrees C. were studied by laser light scattering (LLS). For neutral polymers, such as polyvinyl alcohol and polysulfonamide, aggregation occurred in all the cases except for polyvinyl alcohol in [BMIM][COOH]. For negative polyelectrolytes, such as DNA and polystyrene sulfonate, single chain conformation was observed. However, the hydrodynamic radius of both polymers was much smaller than that in good solvents, suggesting that the chains were condensed. Cellulose was soluble in [AMIM]/[CI], and non-diffusive mode was observed by dynamic light scattering. Zeta potential analysis indicated that cellulose exhibited the feature of polyelectrolyte. The solubility of homopolymers could be qualitatively explained by treating polymer/IL as a ternary system: polymer, cation, and anion. It was the mutual interactions determined the solubility and conformation of polymers in ILs. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：481 / 488
页数：8
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