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题名: Hierarchical porous structures in cellulose: NMR relaxometry approach
作者: Zhang, Chao1, 3; Li, Pingping1, 3; Zhang, Yijin1, 3; Lu, Fei1; Li, Weiwei1, 3; Kang, Hongliang1; Xiang, Jun-feng1; Huang, Yong1, 2; Liu, Ruigang1
关键词: NMR relaxometry ; Cellulose ; Hierarchical porous structure
刊名: POLYMER
发表日期: 2016-08-19
卷: 98, 页:237-243
收录类别: SCI
英文摘要: Hierarchical porous structures in cellulose materials are important for the dissolution, properties and applications of cellulose materials. Methods for characterizing the hierarchical porous structures in cellulose materials without changing its original state are still limited. In this work, we introduced nuclear magnetic resonance (NMR) relaxometry for characterizing the hierarchical porous structures in cotton fibers without modifying their structure during sample preparation. By this method, the changes of the porous structures in cotton samples were characterized. It was found that soaking cellulose in water and stewing cellulose in N,N-dimethylacetamide at high temperature could efficiently improve the accessibility of cellulose samples to the solvent molecules and expand the Amorphous Region in cellulose. The method provided in this work can be used for the evaluation of the hierarchical porous structures of cellulose materials without additional modified information, which is helpful to the utilization of cellulose in various fields. (C) 2016 Elsevier Ltd. All rights reserved.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35596
Appears in Collections:高分子物理与化学实验室_期刊论文

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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.Chinese Acad Sci, Tech Inst Phys & Chem, Natl Res Ctr Engn Plast, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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