Green Preparation of Cellulose Nanocrystal and Its Application
Green Preparation of Cellulose Nanocrystal and Its Application
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纤维素纳米晶的绿色制备及其应用
DOI：
10.1021/acssuschemeng.7b02363
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发表时间：
2018-03-01
影响因子：
8.4
通讯作者：
Huang, Yong
中科院分区：
文献类型：
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作者：
Kang, Xingya;Kuga, Shigenori;Huang, Yong
采用一种绿色的方法制备纤维素纳米晶体（cnc），不使用刺激性化学物质或有机溶剂。该方法简单，先用水球磨纤维素，然后离心。cnc的直径为3 ~ 10 nm，长度为120 ~ 400 nm，宽高比为20 ~ 60。收益率约为20%。由于缺乏化学改性，纳米纤维素的热稳定性与原料纤维素相同。因此，它优于酸水解法制备的cnc。然后采用溶液浇铸法制备了聚乙烯醇(PVA)/CNC复合薄膜。结果表明，在PVA基体中加入5%的cnc，复合膜的拉伸强度比纯PVA膜提高79%。此外，复合膜具有良好的透明性和热稳定性。
A green method was used to prepare cellulose nanocrystals (CNCs) with no use of harsh chemicals or organic solvents. This method was simple via ball milling cellulose with water followed by centrifugation. The diameter and length of the CNCs were 3-10 nm and 120-400 nm, separately, with a aspect ratio of 20-60. The yield was about 20%. The thermal stability of the CNCs was the same as that of raw cellulose owing to lacking of chemical modification. So it was superior to CNCs prepared by acid hydrolysis. Then poly(vinyl alcohol) (PVA)/CNC composite film was made by solution casting. The results showed that the tensile strength of the composite film was 79% increased from neat PVA film when adding 5% CNCs to the PVA matrix. In addition, the composite films possessed good transparency and thermal stability.