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Open AccessArticle

Mechanical and Thermal Properties of All-Wood Biocomposites through Controllable Dissolution of Cellulose with Ionic Liquid

by Ke Chen 1,†, Weixin Xu 2,†, Yun Ding 2,*, Ping Xue 1, Pinghou Sheng 3, Hui Qiao 2, Suwei Wang 1 and Yang Yu 4
1
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2
College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
3
State Key Laboratory of Bio-based Fiber Manufacturing Technology, China Textile Academy, Beijing 100025, China
4
School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Polymers 2020, 12(2), 361; https://doi.org/10.3390/polym12020361
Received: 5 January 2020 / Revised: 27 January 2020 / Accepted: 28 January 2020 / Published: 6 February 2020
(This article belongs to the Special Issue Thermal Properties and Applications of Polymers II)
All-wood biocomposites were prepared with an efficient method. The ionic liquid of 1-butyl-3-methylimidazolium chloride (BMIMCl) was used to impregnate manchurian ash (MA) before hot-pressing, and the all-wood biocomposites were prepared by controllable dissolving and regenerating the cellulose in MA. The Fourier transform infrared analysis suggested that all the components of MA remained unchanged during the preparation. X-ray diffraction, thermogravimetric and scanning electron microscope analysis were carried out to study the process parameters of hot-pressing pressure and time on the crystallinity, thermal properties and microstructure of the all-wood biocomposites. The tensile strength of the prepared all-wood biocomposites reached its highest at 212.6 MPa and was increased by 239% compared with that of the original MA sample. The thermogravimetric analysis indicated that as the thermo-stability of the all-wood biocomposites increased, the mass of the residual carbon increased from 19.7% to 22.7% under a hot-pressing pressure of 10 MPa. This work provides a simple and promising pathway for the industrial application of high-performance and environmentally friendly all-wood biocomposites.
Keywords: all-wood biocomposites; ionic liquid; controllable dissolution; cellulose; mechanical properties; thermal stability all-wood biocomposites; ionic liquid; controllable dissolution; cellulose; mechanical properties; thermal stability
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MDPI and ACS Style

Chen, K.; Xu, W.; Ding, Y.; Xue, P.; Sheng, P.; Qiao, H.; Wang, S.; Yu, Y. Mechanical and Thermal Properties of All-Wood Biocomposites through Controllable Dissolution of Cellulose with Ionic Liquid. Polymers 2020, 12, 361.

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