微晶纤维素
结晶度
纤维素
溶解
化学工程
材料科学
氯化物
聚合
水溶液
再生纤维素
聚合度
高分子化学
纤维素纤维
水解
化学
复合材料
有机化学
聚合物
工程类
作者
Cuihua Dong,Yahui Meng,Binshou Wang,Wenyuan Zhu,Zhiqiang Pang
出处
期刊:Holzforschung
[De Gruyter]
日期:2020-01-10
卷期号:74 (9): 881-890
被引量:3
摘要
Abstract In this study, the effect of antisolvents on the structure of regenerated microcrystalline cellulose (MCC) obtained from the extraction of 1-butyl-3-methylimidazolium chloride (BmimCl) was investigated; further, the usage of the aqueous N , N -dimethylmethanamide (DMF) solution was proposed as an effective antisolvent for cellulose regeneration. The results denoted that regeneration after dissolution resulted in a looser cellulose texture with a high specific surface area, low degree of polymerization (DP), low crystallinity index (CrI), and decreased thermostability, which are favorable for its downstream processing. Among the studied antisolvents, the DMF solution was superior in cellulose regeneration from BmimCl, as demonstrated by the kinetics of enzymatic hydrolysis. The improved ability of the DMF solution with respect to cellulose regeneration can be attributed to the effective dispersion of H-bonds and the inductive hydrophobic orientation of cellulose chains; correspondingly, a looser H-bond network was observed in the regenerated cellulose. The DMF solution as an antisolvent offers an effective cellulose regeneration method and an optimal structure for subsequent processing and applications.
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