Volume 7, Issue 6, November 2019, Page: 315-320
Properties of Fiberboards Bonded by Decomposed Polyurethane Foams and Isocyanate
Tongtong Cui, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
Yan Li, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
Yanfang Pang, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
Xiaosheng Liu, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
Huidong Su, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
An Mao, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China; Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, China
Qi Li, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
Yifu Yuan, Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, College of Forestry, Shandong Agricultural University, Taian, China
Received: Nov. 7, 2019;       Accepted: Nov. 22, 2019;       Published: Dec. 4, 2019
DOI: 10.11648/j.ajaf.20190706.21      View  138      Downloads  63
Abstract
The objective of this study was to investigate the feasibility of using recycled polyols as part of the binder system for wood panels (fiberboard). PU foam wastes from disposed insulation materials were collected, processed, and chemically decomposed by agent to obtain the recycled polyol. The recycled polyol was mixed with a commercial polyol at various weight ratios (0: 100, 20: 80, 40: 60, 60: 40, 80: 20, and 100: 0) to prepare a series of polyol mixtures. Then, the obtained polyol mixtures were then sprayed successively with pMDI resin at various pMDI/polyol mixtures weight ratios (100: 0, 75: 25, and 50: 50) onto wood fibers to prepare fiberboards. The effects of recycled polyol/commercial polyol weight ratio and pMDI/polyol mixture weight ratio on physical and mechanical properties of bonded fiberboards were evaluated. The results showed that the addition of recycled polyol into a commercial polyol helped improve the IB, MOR, and MOE strength of fiberboard, but their effects on water resistance of fiberboard were minor. With the increase of percentage of polyol mixture in pMDI/polyol mixture, the properties of fiberboard presented a trend of decreasing. When the recycled polyol/commercial polyol weight ratio was 40: 60 and the pMDI/polyol mixture was 25: 75, the bonded fiberboard had the overall best physical and mechanical performances. The application of decomposed PU foams in fiberboard production provided a new possible way of recycling polymer wastes.
Keywords
Polyurethane Foam, Recycle, Decomposition, Bonding, Isocyanate
To cite this article
Tongtong Cui, Yan Li, Yanfang Pang, Xiaosheng Liu, Huidong Su, An Mao, Qi Li, Yifu Yuan, Properties of Fiberboards Bonded by Decomposed Polyurethane Foams and Isocyanate, American Journal of Agriculture and Forestry. Vol. 7, No. 6, 2019, pp. 315-320. doi: 10.11648/j.ajaf.20190706.21
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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