纤维素
肿胀 的
纳米纤维
溶剂
牙髓(牙)
氢键
材料科学
膨胀能力
化学工程
高分子化学
催化作用
马来酸酐
有机化学
化学
分子
聚合物
复合材料
共聚物
病理
工程类
医学
作者
Yang Song,Wei Chen,Xun Niu,Guigan Fang,Huihua Min,Hui Pan
出处
期刊:Chemsuschem
[Wiley]
日期:2018-10-17
卷期号:11 (21): 3714-3718
被引量:24
标识
DOI:10.1002/cssc.201801794
摘要
Abstract An energy‐efficient method has been developed to prepare 3–5 nm‐wide carboxyl‐functionalized cellulose nanofibers (CNFs) from pulp fiber by a simple one‐pot swelling followed by esterification process. Tetrabutylammonium acetate (TBAA)/dimethyl sulfoxide (DMSO) binary solvent is used as the swelling agent and the esterification medium admixed with maleic anhydride. All steps are performed at room temperature and no post‐mechanical treatment is needed. The highly efficient defibrillation of pulp fiber to CNFs is thought to be due to two factors: 1) swelling in TBAA/DMSO effectively loosens the structure of cellulose supermolecules by breaking the intra‐ and intermolecular hydrogen bonds between cellulose chains; and 2) the carboxyl groups grafted onto the cellulose molecules by esterification prohibit the reformulation of hydrogen bonds between cellulose chains and therefore stabilize the disperse CNFs with uniform diameter in solution. Other than acid anhydride, no catalyst is added for the esterification, which facilitates the recycling and reuse of the binary solvent. This energy‐efficient one‐pot method could facilitate the large‐scale manufacture of bio‐based nanomaterials.
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