Facile preparation of superhydrophobic wood surfacesviaspraying of aqueous alkyl ketene dimer dispersions
| Autor: | Christian Hansmann, Wolfgang Gindl-Altmutter, Benjamin Arminger, Jozef Keckes |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Chemical Engineering Dimer Ketene 02 engineering and technology 010402 general chemistry 01 natural sciences Contact angle chemistry.chemical_compound medicine Alkyl chemistry.chemical_classification Wax Aqueous solution technology industry and agriculture General Chemistry 021001 nanoscience & nanotechnology Gloss (optics) 0104 chemical sciences chemistry Chemical engineering visual_art visual_art.visual_art_medium Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | RSC Advances. 9:24357-24367 |
| ISSN: | 2046-2069 |
| Popis: | The prevention of excessive water uptake in wood in order to avert discoloration, swelling and decay is a major challenge for wood-based applications. We developed a facile surface treatment to protect wood from liquid water uptake that does not require harsh process conditions or toxic solvents. Water-based and surfactant-free dispersions of sub-micron alkyl ketene dimer wax particles were prepared and sprayed onto wood substrates. After the evaporation of water, the wax particles self-assembled into distinctive platelet structures. Depending on the specific conditions of application, water contact angles as high as 166° were measured on treated wood surfaces. The implementation of sub-micro structures clearly reduced surface gloss but transparency and color remained largely unaffected. The method is comparably cost-effective and scalable, overcoming dimensional limitations crucial for many applications of wood. |
| Databáze: | OpenAIRE |
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