纳米纤维素
纤维素
水解
化学工程
纳米纤维
材料科学
结晶度
化学
热稳定性
纳米网
产量(工程)
酶水解
无定形固体
纳米技术
有机化学
高分子化学
石墨烯
复合材料
工程类
作者
Xiaowen Li,Zhongrun Xiang,Wei Dang,Zewan Lin,Wenxin Huai,Huiqing Wang,Dongdong Ye,Risheng Yao
标识
DOI:10.1016/j.carbpol.2023.121370
摘要
Nanocellulose has received considerable attention in diverse research fields owing to its unique nanostructure-mediated physicochemical properties. However, classical acid hydrolysis usually destroys the microstructural integrity of cellulose, leading to the violent dissociation of cellulose into low-dimensional nanofibers and limiting the formation of intact structures with high specific surface areas. Herein, we have optimized the methodology of dilute acid vapor hydrolysis combined with the enzymatic hydrolysis (DAVE) method and investigated the pore formation mechanism of cellulose nanomesh (CNM). Benefiting from the selective nano-engraving effect of hydrochloric acid vapor on the amorphous region of cellulose followed by widening of the three-dimensional nanopores using enzymatic hydrolysis, confirmed by topographic, spectroscopic, and crystallographic tests, the as-prepared CNM, significantly different from the existing nanocellulose, exhibited improved specific surface area (98.37 m2/g), high yield (88.5 %), high crystallinity (73.4 %), and excellent thermal stability (375.4 °C). The proposed DAVE approach may open a new avenue for nanocellulose manufacturing.
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