Utilization of discarded crop straw to produce cellulose nanofibrils and their assemblies.
Utilization of discarded crop straw to produce cellulose nanofibrils and their assemblies.
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DOI：
10.1016/j.jobab.2020.03.003
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发表时间：
2020-01-01
影响因子：
--
通讯作者：
Bian, Feng-Gang
中科院分区：
文献类型：
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作者：
Miao, Xia-Ran;Lin, Jin-You;Bian, Feng-Gang
小麦作物每年产生大量的小麦秸秆（WS），而只有一小部分用于应用，大部分在田间燃烧，产生大量废气，污染环境。在此，我们报告的提取纤维素纳米纤维（CNF）从碱处理WS的TEMPO氧化和机械崩解的方法相结合。对CNF的晶体结构、热性能、自然电荷进行了研究。将所得CNF的纳米结构单元组装成宏观纤维素材料，即，薄膜、气凝胶和细丝。此外，还对这三种纳米纤维组装体的形貌、微观结构以及其他性能进行了研究。所制备的碳纳米纤维及其组装体在新材料领域具有潜在的应用前景。本工作探索了一种新的方法来利用废弃的WS，而不是被烧毁。
A tremendous amount of wheat straw (WS) has been generated by wheat crops every year, while only a small percentage is being used in applications, and most get burned on the field, causing a large amount of the exhaust gas that pollutes the environment. Herein, we report on the extraction of cellulose nanofibrils (CNF) from the alkali treated WS by a combination of TEMPO-oxidation and mechanical disintegration method. The crystalline structures, thermal properties, natural charge of the CNF were examined. The resultant nano-building blocks of CNF was assembled into macroscopic cellulose materials, i.e., film, aerogel, and filament in this work. Furthermore, the morphologies and microstructues as well as other properties of these three kinds of the CNF assemblies were investigated. The obtained CNF and its assemblies showed a potential application in new materials areas. This work explored a new way to utilize the discarded WS instead of being burned.