Novel Microcapsule Technology in Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Functional Polymer Coatings and Films".

Deadline for manuscript submissions: 30 April 2026 | Viewed by 757

Special Issue Editor


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Guest Editor
1. Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
2. College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China
Interests: polymeric microcapsule; polymeric coating; self-healing
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Special Issue Information

Dear Colleagues,

Microcapsule technology is a powerful tool in the development of next-generation coatings, offering unique advantages such as controlled release, self-healing, corrosion resistance, and enhanced durability. By encapsulating functional agents within microcapsules, coatings can be engineered to respond to environmental stimuli or damage, significantly extending their service life and performance.

This Special Issue, “Novel Microcapsule Technology in Coatings”, aims to highlight the latest advancements in the design, fabrication, characterization, and application of microcapsules in coating systems. We seek contributions that explore innovative encapsulation techniques, shell/core material design, microcapsule integration into various coating matrices, and the resulting functional properties.

Topics of interest include, but are not limited to, the following:

  • Self-healing and smart coatings based on microcapsule systems;
  • Microencapsulation techniques and novel materials for capsule shells and cores;
  • Corrosion-, flame-, or wear-resistant coatings enhanced by microcapsules;
  • Microcapsule-triggered release mechanisms and functional performance;
  • Scale-up, environmental impact, and industrial applications of microcapsule-based coatings.

We welcome original research articles, comprehensive reviews, and case studies that facilitate our understanding and broader application of microcapsule technology in coatings across various fields, including construction, marine, aerospace, and electronics.

We look forward to receiving your contributions.

Prof. Dr. Xiaoxing Yan
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • microcapsules
  • smart coatings
  • self-healing coatings
  • encapsulation techniques
  • controlled release
  • protective coatings
  • stimuli-responsive materials

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Published Papers (1 paper)

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Research

33 pages, 3734 KB  
Article
Preparation and Performance Characterization of Melamine-Formaldehyde-Microencapsulated Waterborne Topcoat–Brass Powder–Waterborne Acrylic Coating
by Wenjing Chang, Yan Han, Xiaoxing Yan and Jun Li
Coatings 2025, 15(8), 951; https://doi.org/10.3390/coatings15080951 - 14 Aug 2025
Viewed by 651
Abstract
A novel self-healing brass powder/waterborne acrylic decorative coating for wooden substrates was developed, in which γ-methacryloxypropyltrimethoxysilane (KH570)-modified brass powder (with a coupling agent concentration of 6% and reaction solution pH of 5) was employed as the filler, and melamine-formaldehyde (MF) resin-encapsulated water-based paint [...] Read more.
A novel self-healing brass powder/waterborne acrylic decorative coating for wooden substrates was developed, in which γ-methacryloxypropyltrimethoxysilane (KH570)-modified brass powder (with a coupling agent concentration of 6% and reaction solution pH of 5) was employed as the filler, and melamine-formaldehyde (MF) resin-encapsulated water-based paint microcapsules were utilized as the healing agent. The brass powder content and the core–wall ratio of the topcoat microcapsules were identified as the predominant factors affecting both the optical and mechanical properties of the self-healing brass powder/waterborne acrylic coating on Basswood surfaces. Therefore, the brass powder content was selected as the primary influencing factor. With concentration gradients of 0.5%, 1%, 3%, 5%, 7%, 9%, and 10%, and under constant conditions of 3% microcapsule content and room temperature curing, the effect of brass powder content on the properties of self-healing microcapsule coatings with different core–wall ratios was investigated. The waterborne acrylic wood coating containing 3% brass powder and 3% microcapsules with a core–wall ratio of 0.58:1 exhibited superior overall performance. This optimized formulation not only maintained excellent optical properties but also significantly enhanced mechanical performance, while preserving outstanding aging resistance, liquid resistance, and self-healing capability. The coating demonstrated the following comprehensive performance metrics: a glossiness of 24.0 GU, color difference (ΔE) of 2.13, chromatic aberration (ΔE*) of 13.68, visible light reflectance of 0.5879, dominant wavelength of 587.47 nm, visible light transmittance of 74.33%, pencil hardness of H grade, impact resistance of 2 kg·cm, adhesion rating of class 2, surface roughness of 2.600 μm, along with excellent aging resistance and liquid resistance properties, while achieving a self-healing efficiency of 19.62%. The coating also exhibited a smooth and uniform microscopic morphology, with the chemical bonds of both the modified brass powder and microcapsules remaining intact within the coating matrix. Full article
(This article belongs to the Special Issue Novel Microcapsule Technology in Coatings)
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