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Published on: June 1, 2012
Constructing chitosan microcapsules using hydroxypropyl methylcellulose for self-healing antibacterial wood coating
Yijuan Chang1, Enwen Liu1, Zhihui Wu2
1College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China.
International Journal of Biological Macromolecules
|March 29, 2025
Summary
This study developed a smart wood coating with self-healing and antibacterial properties using microcapsules. The optimal formulation demonstrated significant damage repair and inhibited bacterial growth, enhancing wood surface technology.
Area of Science:
- Materials Science
- Nanotechnology
- Wood Science
Background:
- Wood materials require enhanced surface properties for durability and functionality.
- Developing multifunctional coatings with self-healing and antibacterial capabilities is a key research area.
- Micro-nano technologies offer innovative solutions for advanced material design.
Purpose of the Study:
- To develop a smart wood coating with self-healing and antibacterial properties.
- To investigate the efficacy of microcapsules containing chitosan, lipophilic titanium dioxide (TiO₂), and hydroxypropyl methylcellulose (HPMC) in a UV-cured coating.
- To optimize the microcapsule formulation and concentration for enhanced wood surface performance.
Main Methods:
- Synthesis of microcapsules using chitosan, lipophilic TiO₂, hydroxypropyl methylcellulose (HPMC), and wood wax oil.
- Integration of microcapsules into a UV-cured coating formulation.
- Application of the coating to Fagus sylvatica wood and evaluation of self-healing, antibacterial activity, and thermal stability.
Main Results:
- Microcapsules with 20.0% lipophilic TiO₂ and 40.0% HPMC showed high encapsulation efficiency, yield, thermal stability, and prolonged release.
- The coating with 2.0% microcapsule mass fraction effectively repaired simulated blade damage (69.04% recovery rate) within six days.
- The coating exhibited strong antibacterial activity, with 92.0% inhibition against Escherichia coli (E. coli) and 75.82% against Staphylococcus aureus (S. aureus).
Conclusions:
- The developed multifunctional wood coating demonstrates excellent self-healing and antibacterial properties.
- The optimal microcapsule concentration (2.0%) significantly enhances coating performance.
- This technology offers a promising advancement for durable and functional wood surfaces.
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