Influence of Swelling Media on the Crystallinity and Accessibility of Lyocell Fibers: An FTIR and 13C NMR Analysis

被引：7
|
作者：
Fadavi, Fereshteh [1 ]
Abdulkhani, Ali [1 ]
Echresh Zadeh, Zahra [2 ]
Hamzeh, Yahya [1 ]
机构：
[1] Univ Tehran, Fac Nat Resources, Dept Wood & Paper Sci & Technol, Karaj, Iran
[2] London South Bank Univ, Sch Engn, Dept Chem & Energy Engn, London, England
来源：
JOURNAL OF NATURAL FIBERS | 2022年 / 19卷 / 13期
关键词：
(13)c cp; mas-nmr; crystallinity; dsc; ftir; lyocell; swelling; SUPRAMOLECULAR STRUCTURE; CELLULOSE CRYSTALLINITY; IDENTIFICATION; INDEX;
D O I：
10.1080/15440478.2021.1916675
中图分类号：
TB3 [工程材料学]; TS1 [纺织工业、染整工业];
学科分类号：
0805 ; 080502 ; 0821 ;
摘要：
Cellulose swelling using different protic, aprotic and alkaline solvents, which are capable of penetrating crystalline parts of cellulose is one of the important methods to enhance the accessibility and, as a result, the reactivity of cellulose in modification reactions. Here we discuss changes in the structure of cellulose II in never-dried Lyocell fibers upon swelling with different solvents and aqueous solutions using FTIR as well as solid-state C-13 NMR spectroscopies and DSC thermal analysis. Changes in the water retention behavior and accessibility of fibers were correlated with solvent-related changes in the fiber structure and were in accordance with the results obtained by FTIR and C-13 NMR spectroscopies.
引用
收藏
页码：6365 / 6376
页数：12
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