Abstract
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%.
Highlights
Waterborne coatings recently have been increasingly used in the worldwide wood industry because of low health and environmental impact [1,2]
The white emulsion solution was dialyzed under flowing water for 3 days until pH 6 value was reached, and the dialyzed solution was sonicated for 20 min; the black thick cellulose nanocrystals/graphene materials (CNC/graphene materials (GM)) sols were obtained
Appears near that is close to the diffraction peak of graphene materials, the presence of graphene materials in Cellulose nanocrystals (CNCs)/GM sol mixtures [55]
Summary
Feng Yang 1,2 , Yan Wu 3, * , Shuqin Zhang 2 , Haiming Zhang 1 , Suilang Zhao 1 , Jilei Zhang 4 and Benhua Fei 2, *. 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. College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China. Received: 29 November 2019; Accepted: 26 December 2019; Published: 2 January 2020
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
