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Effect of Cellulose Nanocrystalline/Graphene Composite Solution on Properties of Two-Component Waterborne Polyurethane Coatings
Pages: 71-74
Year: Issue:  1
Journal: Furniture

Keyword:  two-component waterborne polyurethane coatingsgraphenecellulose nanocrystallinemodification;
Abstract: With the increasing pursuit of the quality of life, the performance requirements of waterborne wood coatings are becoming more higher. The application requirements of waterborne coatings with nontoxic environment-friendly and excellent mechanical properties in the domestic wood products industry are increasing. In this paper, the two-component waterborne polyurethane coatings(2 K-WPU) with high wear resistance, high hardness and high adhesion were developed by using cellulose nanocrystalline solution(CNC) as dispersion and biomass source graphene(Gr) as coating modifier, which can improve the present situation of poor mechanical properties of waterborne coatings in order to expand their application scope in household wood products industry. The results showed that the hardness and wear resistance of the coating were improved and the gloss decreased with the addition of CNC/Gr composite solution. The adhesion of the coating didn’t change at the condition of different CNC/Gr composite solution loadings and the hardness increased from 5 H to 6 H. When the ratio of CNC was of 4% and Gr was 3%, the coating had the best wear resistance and the amount of wear was 0.0 453 g. The gloss of the coating decreased from 21.8% to 6.1%. The CNC/Gr composite solution modified waterborne coating method is environmental friendly and experimental easily. It is simple and easy to operate and provides an effective way to develop functional waterborne wood coatings with good performance.
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