Effects of Thermochromic Fluorane Microcapsules and Self-Repairing Waterborne Acrylic Microcapsules on the Properties of Water-Based Coatings on Basswood Surface

Abstract

The effect of the addition of fluorane microcapsules and urea formaldehyde resin (UF) waterborne acrylic resin microcapsules on the comprehensive properties of the water film on the surface of basswood was studied. Three-factor and two-level orthogonal experiments were carried out with “fluorane microcapsule content”, “aqueous acrylic resin microcapsule content” and the “fluorane microcapsule addition method” to prepare a self-repairing thermochromic coating. The optical, mechanical, microstructure and self-repairing properties of the film were optimized by independent experiments on the maximum influence factors of the fluorane microcapsule content. It was concluded that the topcoat with 15% fluorane microcapsules and primer added with 15% water acrylic resin microcapsules had better comprehensive properties. The temperature range was 30–32 °C, the color difference at 32 °C was 72.6 ± 2.0, the 60° gloss was 3.3%, the adhesion was 0 grade, the hardness was 4 H, the impact resistance was 15.0 ± 0.8 kg∙cm, the elongation at break was 17.2% and the gap width was reduced by 3.5 ± 0.1 μm after the film was repaired. The repair rate reached 62.5%. By using microcapsule embedding technology, the repair agent and discoloration agent are embedded in the matrix. The waterborne acrylic resin microcapsules can effectively inhibit crack formation in the coating, and the fluorane microcapsules can achieve the thermochromic property of the coating. This study provides a new research idea for the self-repairing thermochromic dual function of a water-based coating.

Research on Decorative Materials Properties Used in the Production of Cabinets Based on Visual/Tactile Experience

“…The test data were first analysed for reliability, and the results showed that the Cronbach coefficient was 0.948, a high value, indicating that the data from this questionnaire had high credibility [26]. After data cleaning and removal of invalid data, 30 sets of valid data were obtained, resulting in a mean score of subjective evaluation for the nine material samples (Table 2).…”

Mechanical and acoustic characteristics of four wood species subjected to bending load

“…Researchers have tried to obtain more accurate AE signals to know the position and details of cracks in wood and wood constructions. However, AE characteristic signals of wood are affected by many factors, such as wood species (Perrin et al 2019, Xu et al 2020, Ansell 1982, Liu et al 2023, moisture content (Sato et al 1984, Fu et al 2021, density (softwood and hardwood) (Ansell 1982, Reiterer et al 2000, Chen et al 2006, wood grains (Brémaud et al 2011, Boccacci et al 2022, loading types (Chen et al 2006, Ohuchi et al 2011) and the distance between the AE source and the transducers (Lukomski et al 2017, Pan et al 2022. Most studies were mainly focused on how these factors influenced AE characteristic signals and their relationships with mechanical properties of wood (Rescalvo et al 2020).…”

Effect of Coating Process of Photochromic and Thermochromic Composite Microcapsules on Coating Properties for Basswood

“…Based on the previous studies [41,42], fluorane microcapsules are used as photochromic materials, and crystal violet lipid complexes are used as thermochromic materials. Yan et al [43] studied the bifunctional coating with self-healing and photochromic properties, and the coating has a single color-change property.…”