Dissolution Mechanism of Cellulose in N,N-Dimethylacetamide/Lithium Chloride: Revisiting through Molecular Interactions

doi:10.1021/jp506013c

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	Dissolution Mechanism of Cellulose in N,N-Dimethylacetamide/Lithium Chloride: Revisiting through Molecular Interactions
	Zhang, Chao 1,2; Liu, Ruigang 1; Xiang, Junfeng 1; Kang, Hongliang 1; Liu, Zhijing 1,2; Huang, Yong 1,3
刊名	JOURNAL OF PHYSICAL CHEMISTRY B
	2014-08-07
卷号	118 期号:31 页码:9507-9514
ISSN号	1520-6106
DOI	10.1021/jp506013c
英文摘要	Understanding the interactions between solvent molecules and cellulose at a molecular level is still not fully achieved in cellulose/N,N-dimethylacetamide (DMAc)/LiCl system. In this paper, cellobiose was used as the model compound of cellulose to investigate the interactions in cellulose/DMAc/LiCl solution by using Fourier transform infrared spectroscopy (FTIR), C-13, Cl-35, and Li-7 nuclear magnetic resonance (NMR) spectroscopy and conductivity measurements. It was found that when cellulose is dissolved in DMAc/LiCl cosolvent system, the hydroxyl protons of cellulose form strong hydrogen bonds with the Cl-, during which the intermolecular hydrogen bonding networks of cellulose is broken with simultaneous splitting of the Li+-Cl- ion pairs. Simultaneously, the Li+ cations are further solvated by free DMAc molecules, which accompany the hydrogen-bonded Cl- to meet electric balance. Thereafter, the cellulose chains are dispersed in molecular level in the solvent system to form homogeneous solution. This work clarifies the interactions in the cellulose/DMAc/LiCl solution at molecular level and the dissolution mechanism of cellulose in DMAc/LiCl, which is important for understanding the principle for selecting and designing new cellulose solvent systems.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000340223000042
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51631]
专题	中国科学院化学研究所
通讯作者	Liu, Ruigang
作者单位	1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Sate Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Tech Inst Phys & Chem, Natl Res Ctr Engn Plast, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chao,Liu, Ruigang,Xiang, Junfeng,et al. Dissolution Mechanism of Cellulose in N,N-Dimethylacetamide/Lithium Chloride: Revisiting through Molecular Interactions[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2014,118(31):9507-9514.
APA	Zhang, Chao,Liu, Ruigang,Xiang, Junfeng,Kang, Hongliang,Liu, Zhijing,&Huang, Yong.(2014).Dissolution Mechanism of Cellulose in N,N-Dimethylacetamide/Lithium Chloride: Revisiting through Molecular Interactions.JOURNAL OF PHYSICAL CHEMISTRY B,118(31),9507-9514.
MLA	Zhang, Chao,et al."Dissolution Mechanism of Cellulose in N,N-Dimethylacetamide/Lithium Chloride: Revisiting through Molecular Interactions".JOURNAL OF PHYSICAL CHEMISTRY B 118.31(2014):9507-9514.