Characterization of the regenerated cellulose films in ionic liquids and rheological properties of the solutions

被引：135

作者：

Liu, Zhen ^{[1
]}

Wang, Hui ^{[1
]}

Li, Zengxi ^{[1
]}

Lu, Xingmei ^{[2
]}

Zhang, Xiangping ^{[2
]}

Zhang, Suojiang ^{[2
]}

Zhou, Kebin ^{[1
]}

机构：

[1] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 128卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Biomaterials; Surface properties; Thin films; Polymers; POLYMERIZATION; DERIVATIVES; DISSOLUTION; SOLVENTS; SYSTEMS;

D O I：

10.1016/j.matchemphys.2011.02.062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dissolution and regeneration of cotton pulp using ionic liquids as solvent was investigated. The physicochemical properties of the regenerated cellulose films have been characterized by scanning electron microscopy. X-ray diffractometer, infrared spectrometric analyzer, differential scanning calorimeter, and thermogravimetric analysis instrument. The rheological properties of cotton pulp dissolved in ionic liquids have been investigated by steady shear and oscillatory shear measurements. The influences of experimental parameters, such as the reaction temperature, additives on the solubility and degree of polymerization (DP) of regenerated cellulose were also studied. The results show that 1-butyl-3-methylimidazolium chloride ([bmim]Cl) was a good solvent to dissolve cotton pulp and the solubility can reach 13 wt% at 90 degrees C, but the DP remarkably decreased from 510 to 180 within 7h. It was found that additive N-methylimidazole can effectively minimize DP loss of the regenerated cellulose, which can attribute to the fact that in the mixture of [bmim]Cl and NMI solution, the beta-1,4-glycosidic bond of the cellulose chains cannot be broken because of the relative low concentration of Cl-. In the steady shear measurement, all the solutions show a shear thinning behavior at high shear rates. In addition, a mechanism of the dissolution of cellulose in [bmim]Cl was proposed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：220 / 227

页数：8

共 34 条

[1]

*ASTM, D179596 ASTM

[2]

Bang YH, 1999, J APPL POLYM SCI, V73, P2681, DOI 10.1002/(SICI)1097-4628(19990923)73:13<2681::AID-APP16>3.0.CO

[3]

2-Z

[4] Novel fibers prepared from cellulose in NaOH/urea aqueous solution [J].

Cai, J ;

Zhang, LN ;

Zhou, JP ;

Li, H ;

Chen, H ;

Jin, HM .

MACROMOLECULAR RAPID COMMUNICATIONS, 2004, 25 (17) :1558-1562

[5] Rheology of Concentrated Cellulose Solutions in 1-Butyl-3-methylimidazolium Chloride [J].

Chen, Xun ;

Zhang, Yumei ;

Cheng, Lingyan ;

Wang, Huaping .

JOURNAL OF POLYMERS AND THE ENVIRONMENT, 2009, 17 (04) :273-279

[6] Hydrogen bonds in imidazolium ionic liquids [J].

Dong, Kun ;

Zhang, Suojiang ;

Wang, Daxi ;

Yao, Xiaoqian .

JOURNAL OF PHYSICAL CHEMISTRY A, 2006, 110 (31) :9775-9782

[7] All-cellulose composites by partial dissolution in the ionic liquid 1-butyl-3-methylimidazolium chloride [J].

Duchemin, Benoit J. C. ;

Mathew, Aji P. ;

Oksman, Kristiina .

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2009, 40 (12) :2031-2037

[8] Side reaction of cellulose with common 1-alkyl-3-methylimidazolium-based ionic liquids [J].

Ebner, Gerald ;

Schiehser, Sonja ;

Potthast, Antje ;

Rosenau, Thomas .

TETRAHEDRON LETTERS, 2008, 49 (51) :7322-7324

[9] Controlling the aqueous miscibility of ionic liquids: Aqueous biphasic systems of water-miscible ionic liquids and water-structuring salts for recycle, metathesis, and separations [J].

Gutowski, KE ;

Broker, GA ;

Willauer, HD ;

Huddleston, JG ;

Swatloski, RP ;

Holbrey, JD ;

Rogers, RD .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (22) :6632-6633

[10]

Heinze T, 2000, MACROMOL CHEM PHYSIC, V201, P627, DOI 10.1002/(SICI)1521-3935(20000301)201:6<627::AID-MACP627>3.3.CO

← 1 2 3 4 →