Coating Performance of Water-Based Polyurethane-Acrylate Coating on Bamboo/Bamboo Scrimber Substrates

Abstract

In this paper, a kind of high solid content water-based polyurethane-acrylate (PUA) coating was synthesized in laboratory. Bamboo, bamboo scrimber, and heat-treated bamboo scrimber were selected as substrates and coated with the PUA coating. The coating properties of those materials were investigated. The results showed that PUA coating could well cover the surface of the three kinds of materials. However, the coating performances varied among these substrates due to their different chemical and morphological surfaces. Due to the densified structures, small pores, and improved hydrophobicity of bamboo scrimber, it was difficult for PUA coating to wet and penetrate into the substrate, where the smaller contact angle and penetration depth were obtained compared with bamboo. In contrast, heat-treated one had better hydrophilicity and smaller contact angle with PUA coating than pure bamboo scrimber. Therefore, the coating performance of heat-treated bamboo scrimber was better with lower average roughness value. However, the adhesion classification between the coating and all substrates was 2 (with 5-15% cross-cut area of flaking along the edges).

Chemical and Mechanical Characterization of Licorice Root and Palm Leaf Waste Incorporated into Poly(urethane-acrylate) (PUA)

“…The novelty of the work is in the application of these two lignocellulosic waste fillers, as an example for other available fillers, into a poly(urethane-acrylate) (PUA) matrix, with the intent to characterize the capability of this polymer instead of the classical epoxy resins. PUA has been used in view of its capacity to offer effective coatings for lignocellulosic substrates for the possible quality of its interaction with these: this has been verified e.g., in the case of bamboo [17].…”

Effect of Resin Content on the Surface Wettability of Engineering Bamboo Scrimbers

“…However, they are lignocellulosic composite materials, which are susceptible to discoloration, biological attack and degradation, particularly in outdoor conditions, affecting the performance and durability [9,10]. A generic solution is to cover their surfaces with coatings, which can effectively prevent them from being exposed to the air [11,12].…”

Surface Properties of Pine Scrimber Panels with Varying Density

“…Scrimbers are coated with a coating for aesthetical appearance, and long-term utilization against weather, abrasion, and biological attack [8][9][10]. Their surface properties exhibit high affinity to the bonding quality between the coating and panel surface [11].…”