纤维素
过氧化氢
硝酸
纳米纤维
水溶液
结晶度
材料科学
热稳定性
竹子
木质素
生物量(生态学)
化学工程
化学
核化学
有机化学
复合材料
工程类
地质学
海洋学
作者
Jinlong Wang,Xusheng Li,Jianxiao Song,Kunze Wu,Yichun Xue,Yiting Wu,Shuangfei Wang
出处
期刊:Nanomaterials
[MDPI AG]
日期:2020-05-15
卷期号:10 (5): 943-943
被引量:15
摘要
Separating the fibers, deconstructing both the interlamellar structures and the intermicrofibrils structures in the cell wall, and cleaving the amorphous regions of cellulose (all reached in one bath chemical-assisted treatment), then extracting cellulose nanofibers (CNFs) from biomass, is both challenging and imperative. A simple, cost-effective and green strategy for extracting CNFs from bamboo using nitric acid and hydrogen peroxide (NCHP), to enable fibrillation via a cooperative mechanism, is demonstrated herein. NCHP-CNFs 13.1 ± 2.0 nm wide, with a high aspect ratio, 74% crystallinity, excellent UV resistance and high thermal stability, were successfully extracted by treatment in HNO3 aqueous solution, at a concentration of 3.2 mol/L, and treatment with 60.00 mmol/g H2O2 at 50 °C for 48 h. The yields of NCHP-CNFs reached 73% and 99% based on biomass and cellulose, respectively, due to the high delignification selectivity of OH+ and the mild aqueous conditions during the NCHP treatment. These NCHP-CNFs with excellent UV resistance can potentially be applied in the field of UV-resistant coatings, to replace organic and inorganic materials.
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