Abstract
The effect of adding wheat straw powder after lignin removal (WSPALR) and high-temperature calcined WSPALR on the hardness, adhesion, and resistance to impact, color difference, and mold resistance of waterborne coatings was studied. The results showed that the hardness was the highest of 6H when the concentration of WSPALR was 1.0%–2.0%. WSPALR and high-temperature calcined WSPALR had little effect on the adhesion and impact resistance of waterborne coatings, and the resistance to impact was about 10.0 kg cm. When both the concentration of WSPALR and high-temperature calcined WSPALR were 0.5%, the waterborne coating had the best adhesion of Level 1. The addition of high-temperature calcined WSPALR maintained the color difference of the original coatings. A high WSPALR concentration showed better mold resistance than a low concentration WSPALR, and the inhibition effect of high-temperature calcined WSPALR on Trichoderma was better than that of WSPALR. When the concentration of WSPALR calcined at a high temperature was 0.5%, it showed a better hardness of 4H, Level 1 adhesion, 10.0 kg cm resistance to impact, and 1.1 color difference of the waterborne coating. This work has important application value for mold resistance of wood coatings.
Highlights
In recent years, people’s awareness of health and environmental protection has gradually increased, and the relevant environmental protection policies and regulations have been further improved [1].Waterborne coatings, powder coatings, high solid coatings, and other new coatings have become a new direction in the development of coatings [2]
When the concentration of wheat straw powder after lignin removal (WSPALR) calcined at a high temperature was 0.5%, it showed a better hardness of 4H, Level 1 adhesion, 10.0 kg cm resistance to impact, and 1.1 color difference of the waterborne coating
The experimental results show that the hardness of waterborne coatings with WSPALR and high-temperature calcined WSPALR can be improved
Summary
Waterborne coatings, powder coatings, high solid coatings, and other new coatings have become a new direction in the development of coatings [2]. Waterborne coatings have the advantages of rational use of resources, non-pollution of the environment, and less harm to the human body [4]. The most important feature of waterborne coatings is that they do not contain volatile organic compounds and air pollutants [5]. Waterborne coatings have become the focus of research and development in the field of coatings [6]. When waterborne coatings are applied to the wood surface, mold may cause discoloration and even decrease the adhesion strength of the film, which will affect the service life of products, and bring serious economic losses to manufacturers and users [9]
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