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Mechanical and Thermal Properties of Waterborne Polyurethane Coating Modified through One-Step Cellulose Nanocrystals/Graphene Materials Sols Method

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Fashion Accessory Art and Engineering College, Beijing Institute of Fashion Technology, Beijing 100029, China
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Key Laboratory of Bamboo and Rattan Science and Technology of the State Forestry Administration, Department of Bio-materials, International Centre for Bamboo and Rattan, Futong Dong Dajie, Chaoyang District, Beijing 100102, China
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College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China
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Department of Sustainable Bioproducts, Mississippi State University, Mississippi State, MS 39762, USA
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Authors to whom correspondence should be addressed.
Coatings 2020, 10(1), 40; https://doi.org/10.3390/coatings10010040
Received: 29 November 2019 / Revised: 21 December 2019 / Accepted: 26 December 2019 / Published: 2 January 2020
(This article belongs to the Special Issue Advances in Polymer/Graphene Composite for Bio-Applications)
Developing multifunctional coatings with excellent mechanical and thermal properties is highly desirable for wood-based composite application. The recent development of waterborne coatings for wood products suggests that a promising thermosetting material needs to also have properties like low volatile organic contents (VOCs), hardness, and fast curing. The cellulose nanocrystals/graphene materials (CNC/GM) sols were prepared through the one-step method as the thermally conductive and reinforced modifier for preparing waterborne polyurethane (WPU) coatings. The influence of this modifier on the thermal and mechanical properties such as thermal conductivity, abrasion resistance, and adhesion of WPU coatings was investigated. The results indicated that adding CNC/GM sols increased the hardness, abrasion resistance, and thermal conductivity of the WPU coatings, and meanwhile maintained the coating adhesion at the highest grade (level 1). The highest abrasion resistance value of 0.023 g/100 r was obtained for the modified WPU coating when the addition of GM was 3%. View Full-Text
Keywords: waterborne polyurethane coating; cellulose nanocrystals; graphene materials; property waterborne polyurethane coating; cellulose nanocrystals; graphene materials; property
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MDPI and ACS Style

Yang, F.; Wu, Y.; Zhang, S.; Zhang, H.; Zhao, S.; Zhang, J.; Fei, B. Mechanical and Thermal Properties of Waterborne Polyurethane Coating Modified through One-Step Cellulose Nanocrystals/Graphene Materials Sols Method. Coatings 2020, 10, 40.

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