Preparation and Self-Repairing Properties of MF-Coated Shellac Water-Based Microcapsules

Abstract

A self-repairing microcapsule was prepared by emulsion polymerization using melamine formaldehyde resin (MF) as wall material, and a mixture of shellac solution and water-based coating as core material. The orthogonal experiment was carried out through five factors and four levels. The effects of Wcore:Wwall, Wemulsifier:Wcore, stirring rate, Wshellac:Wcoating, Wemulsifier solution:Wcore on the output and coverage rate of microcapsules were studied. The stirring rate has a great influence on the preparation process of the MF-coated shellac water-based microcapsules. When the Wcore:Wwall is 0.8:1, Wemulsifier:Wcore is 3:100, stirring rate is 600 rpm, Wshellac:Wcoating is 1:1, Wemulsifier solution:Wcore is 9:1, the prepared microcapsules have the best shape and size. With the increase in concentration of microcapsules, the color difference and gloss of paint film decreased gradually. The tensile strength, scanning electron microscopy (SEM), infrared spectroscopy and repair effects of the paint film were analyzed. When the concentration of microcapsules was 5.0–10.0%, the comprehensive performance of the paint film was better, providing a technical reference for the self-repairing coatings.

Preparation of Thermochromic Microcapsules of Bisphenol A and Crystal Violet Lactone and Their Effect on Coating Properties

“…After 2 h, the remaining substances were pumped and filtered, dried, and weighed, and the result was recorded as m 2 . The coating rate ( P ) of the microcapsules was calculated according to the following formula [ 24 ]: P = ( m 1 − m 2 )/ m 1 × 100% …”

Effects of Three Different Types of Aloin on Optical, Mechanical, and Antibacterial Properties of Waterborne Coating on Tilia europaea Surface

“…The corresponding peaks also appeared in the infrared spectra of the two aloin microcapsules, indicating the existence of the aloin core material in the microcapsules and that the components were not damaged. The peak values of 3370, 1570, and 1344 cm −1 are the vibration absorption peaks of N-H, C=N, and C-N bonds in melamine-formaldehyde resin [26], which indicates that the wall material melamine-formaldehyde resin has successfully coated the aloin core material. microcapsules prepared with ethanol as the solvent have better morphological characteristics, smooth surface, uniform particle size, and round dispersion, followed by the aloin microcapsules prepared with water as the solvent.…”

“…The corresponding peaks also appeared in the infrared spectra of the two aloin microcapsules, indicating the existence of the aloin core material in the microcapsules and that the components were not damaged. The peak values of 3370, 1570, and 1344 cm −1 are the vibration absorption peaks of N-H, C=N, and C-N bonds in melamineformaldehyde resin[26], which indicates that the wall material melamine-formaldehyde resin has successfully coated the aloin core material.…”

Visual pressure interactive display of alternating current electroluminescent devices based on hydrogel microcapsules

“…Specifically, the hydrogel microcapsules prepared by the water-water interface environmental protection system opened a platform for future sustainable development. 40,41 At present, hydrogel microcapsules are widely used in the field of biomedicine to achieve the effect of drug release, and have not been applied in electronic devices such as ACEL devices. The innovation of interactive ACEL through microcapsule technology can solve the problems of directional release and delay monitoring of interactive ACEL in the above visual interactive application process.…”