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Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating

With the enhancement of people’s environmental awareness, waterborne polyurethane (PU) paint—with its advantages of low release of volatile organic compounds (VOCs), low temperature flexibility, acid and alkali resistance, excellent solvent resistance and superior weather resistance—has made its app...

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Autores principales: Kong, Linglong, Xu, Dandan, He, Zaixin, Wang, Fengqiang, Gui, Shihan, Fan, Jilong, Pan, Xiya, Dai, Xiaohan, Dong, Xiaoying, Liu, Baoxuan, Li, Yongfeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6749433/
https://www.ncbi.nlm.nih.gov/pubmed/31470628
http://dx.doi.org/10.3390/molecules24173151
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author Kong, Linglong
Xu, Dandan
He, Zaixin
Wang, Fengqiang
Gui, Shihan
Fan, Jilong
Pan, Xiya
Dai, Xiaohan
Dong, Xiaoying
Liu, Baoxuan
Li, Yongfeng
author_facet Kong, Linglong
Xu, Dandan
He, Zaixin
Wang, Fengqiang
Gui, Shihan
Fan, Jilong
Pan, Xiya
Dai, Xiaohan
Dong, Xiaoying
Liu, Baoxuan
Li, Yongfeng
author_sort Kong, Linglong
collection PubMed
description With the enhancement of people’s environmental awareness, waterborne polyurethane (PU) paint—with its advantages of low release of volatile organic compounds (VOCs), low temperature flexibility, acid and alkali resistance, excellent solvent resistance and superior weather resistance—has made its application for wood furniture favored by the industry. However, due to its lower solid content and weak intermolecular force, the mechanical properties of waterborne PU paint are normally less than those of the traditional solvent-based polyurethane paint, which has become the key bottleneck restricting its wide applications. To this end, this study explores nanocellulose derived from biomass resources by the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation method to reinforce and thus improve the mechanical properties of waterborne PU paint. Two methods of adding nanocellulose to waterborne PU—chemical addition and physical blending—are explored. Results show that, compared to the physical blending method, the chemical grafting method at 0.1 wt% nanocellulose addition results in the maximum improvement of the comprehensive properties of the PU coating. With this method, the tensile strength, elongation at break, hardness and abrasion resistance of the waterborne PU paint increase by up to 58.7%, ~55%, 6.9% and 3.45%, respectively, compared to the control PU; while the glossiness and surface drying time were hardly affected. Such exploration provides an effective way for wide applications of water PU in the wood industry and nanocellulose in waterborne wood coating.
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spelling pubmed-67494332019-09-27 Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating Kong, Linglong Xu, Dandan He, Zaixin Wang, Fengqiang Gui, Shihan Fan, Jilong Pan, Xiya Dai, Xiaohan Dong, Xiaoying Liu, Baoxuan Li, Yongfeng Molecules Article With the enhancement of people’s environmental awareness, waterborne polyurethane (PU) paint—with its advantages of low release of volatile organic compounds (VOCs), low temperature flexibility, acid and alkali resistance, excellent solvent resistance and superior weather resistance—has made its application for wood furniture favored by the industry. However, due to its lower solid content and weak intermolecular force, the mechanical properties of waterborne PU paint are normally less than those of the traditional solvent-based polyurethane paint, which has become the key bottleneck restricting its wide applications. To this end, this study explores nanocellulose derived from biomass resources by the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation method to reinforce and thus improve the mechanical properties of waterborne PU paint. Two methods of adding nanocellulose to waterborne PU—chemical addition and physical blending—are explored. Results show that, compared to the physical blending method, the chemical grafting method at 0.1 wt% nanocellulose addition results in the maximum improvement of the comprehensive properties of the PU coating. With this method, the tensile strength, elongation at break, hardness and abrasion resistance of the waterborne PU paint increase by up to 58.7%, ~55%, 6.9% and 3.45%, respectively, compared to the control PU; while the glossiness and surface drying time were hardly affected. Such exploration provides an effective way for wide applications of water PU in the wood industry and nanocellulose in waterborne wood coating. MDPI 2019-08-29 /pmc/articles/PMC6749433/ /pubmed/31470628 http://dx.doi.org/10.3390/molecules24173151 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kong, Linglong
Xu, Dandan
He, Zaixin
Wang, Fengqiang
Gui, Shihan
Fan, Jilong
Pan, Xiya
Dai, Xiaohan
Dong, Xiaoying
Liu, Baoxuan
Li, Yongfeng
Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating
title Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating
title_full Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating
title_fullStr Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating
title_full_unstemmed Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating
title_short Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating
title_sort nanocellulose-reinforced polyurethane for waterborne wood coating
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6749433/
https://www.ncbi.nlm.nih.gov/pubmed/31470628
http://dx.doi.org/10.3390/molecules24173151
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