纳米纤维素
材料科学
纤维素
热稳定性
牙髓(牙)
化学工程
结晶度
水溶液
硫脲
热重分析
复合材料
有机化学
化学
医学
工程类
病理
作者
Shaobo Zhang,Feiran Zhang,Liping Jin,Bo Liu,Yi Mao,Yang Liu,Jintian Huang
出处
期刊:Cellulose
[Springer Nature]
日期:2019-04-27
卷期号:26 (8): 5177-5185
被引量:79
标识
DOI:10.1007/s10570-019-02434-9
摘要
Sphere shape nanocellulose with cellulose II type crystal structure was prepared from waste paper by the swelling on aqueous system NaOH/thiourea/urea, a efficient, inexpensive, and less toxic strategy. The crystalline structure of bleached pulp and nanocellulose was performed using XRD. The nanocellulose exhibits the cellulose II type crystal structure. The crystallinity index of the nanocellulose is calculated to be 48.85%, lower than those of bleached pulp (64.42%). The FTIR of the bleached pulp and the nanocellulose were collected. It indicated that lignin and hemicellulose were removed during the dissolution of cellulose. Sphere shape nanocellulose particles were observed by scanning electron microscopy and transmission electron microscopy. The particle size distribution of nanocellulose was determined using dynamic light scattering. It showed an average size of 50 nm. The thermal behaviors of the bleached pulp and nanocellulose were studied by thermo gravimetric. The obtained nanocellulose had better thermal stability than bleached pulp, which have potential applications in transistors and batteries with high thermal stability.
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