Abstract
The effects of the core-shell ratio and concentration of urea formaldehyde (UF) resin-coated waterborne acrylic resin microcapsules on the optical properties, mechanical properties and liquid resistance of waterborne topcoat coatings on the surface of Tilia europaea were investigated. With the increase of microcapsule concentration, the color difference and hardness of the paint film gradually increased, the gloss and adhesion of the paint film gradually decreased, and the impact resistance and elongation at break of the paint film increased first and then decreased. With the increase of the core-shell ratio, the hardness and impact resistance of the paint film increased first and then decreased, and the adhesion of the paint film decreased gradually. Red ink had a great influence on the liquid resistance of paint film. When the core-shell ratio of UF-coated waterborne acrylic resin microcapsule was 0.58:1 and the microcapsule concentration was 10.0%, the comprehensive performance of paint film on Tilia europaea was better. The prepared self-healing microcapsules applied to the waterborne coatings committed to prolonging the service life of the paint film.
Highlights
As a natural polymer composite material, wood material has unique texture and color [1]
As environmental awareness is growing, wood materials have become the preferred object of use because of their high strength to weight ratio, low energy consumption, natural degradation and recyclable utilization, and they are widely used in construction, indoor, packaging, railway transportation and other production activities [3,4]
This paper mainly studied the effects of the core-shell ratio and the concentration of microcapsules on the properties of paint film
Summary
As a natural polymer composite material, wood material has unique texture and color [1]. It is a common green resource in nature [2]. As environmental awareness is growing, wood materials have become the preferred object of use because of their high strength to weight ratio, low energy consumption, natural degradation and recyclable utilization, and they are widely used in construction, indoor, packaging, railway transportation (as hardwood sleepers) and other production activities [3,4]. Waterborne wood coatings are very popular in wood surface finishing because of their advantages regarding environmental protection, pollution resistance and fast drying [15]. There are some disadvantages, such as easy aging and microcracks in daily use, which impinge on the beauty and service life of these products [16]
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