15. Sep 2021 | Application Areas
Transparent wood coating for weathering resistance
For the novel coating, graphitic carbon nitride nanosheets (gCNNS) were used as nontoxic and metal-free UV absorber. Cellulose nanofibril (CNF) was selected as an environment-friendly and renewable film-forming carrier, which addressed the issues of agglomeration and low composite adhesion of gCNNS on the wood surface. The gCNNS/CNF composite coating was formulated on the wood surface via spin coating method.
Coatings can be applied to a wide variety of substrates
A following hydrophobic treatment by thermal chemical vapor deposition (CVD) method was to solve the problem of rainwater erosion in outdoor application. After 15-day accelerated weathering tests, the total colour change of the treated sample was 79.6% lower than that of the untreated one. As the scientists report, the newly-designed environment-friendly and weathering resistant coatings can be applied to a wide variety of substrates in the future.
The study has been published in Progress in Organic Coatings, Volume 159, October 2021.
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