Researchers at Stockholm University have developed a wood coating made from tree bark waste , a traditionally underused material. This coating, based on birch and spruce bark components, offers an environmentally friendly alternative to synthetic coatings based on fossil products .
A wood coating based on biocomposites
The new wood treatment takes advantage of the subernic acids in birch bark and the polyphenols in fir bark, creating an aqueous suspension that is easy to apply. This coating, in addition to being biocompatible and biodegradable , also improves the mechanical properties of the treated wood, providing water resistance that surpasses even the most conventional synthetic products.
Researchers point out that by incorporating these natural compounds, they achieve a finish that acts as a true ” protective crust ” for the wood, stabilizing the humidity and protecting it from external agents.
Tree bark transforms construction
The discovery of this sustainable system responds to the growing demand for environmentally friendly materials and helps reduce the environmental impact of products used in construction. Mika Sipponen, project supervisor, emphasises that the bark, which is usually burned as waste, can now be used to produce a high-performance protective coating , without relying on toxic compounds or fossil sources.
The importance of this breakthrough lies in its ability to transform waste into valuable resources, aligning with global sustainability goals and the circular economy. This not only reduces the carbon footprint of building materials , but also promotes environmentally responsible practices.
Experts join forces to protect wood
The research team at Stockholm University has not worked alone on this project. To ensure the success of the development, they have collaborated closely with experts from a variety of disciplines, from crust supply to coating performance testing. This cooperation ensures that the system is both effective and viable for large-scale production.
This development positions wood as a renewable and environmentally friendly material and also reinforces the growing demand for greener and more responsible construction solutions.
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Source and photos: Department of Materials and Environmental Chemistry, Stockholm University
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