Toward energy efficiency through an optimized use of wood: The development of natural hydrophobic coatings that retain moisture-buffering ability
| Autor: | Mark Hughes, Alina Lozhechnikova, Katja Vahtikari, Monika Österberg |
|---|---|
| Přispěvatelé: | Kemian tekniikan korkeakoulu, School of Chemical Technology, Puunjalostustekniikan laitos, Department of Forest Products Technology, Bioproduct Chemistry & Aalto Energy Efficiency Research Programme (AEF), Aalto-yliopisto, Aalto University, Department of Bioproducts and Biosystems |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
MBV practical
Materials science engineering.material Contact angle chemistry.chemical_compound Coating Moisture buffering Relative humidity Electrical and Electronic Engineering Composite material ta216 ta215 Lacquer Civil and Structural Engineering Wax Energy Moisture Mechanical Engineering Wood surface modification Humidity Building and Construction Paper technology Natural coating chemistry visual_art engineering visual_art.visual_art_medium Carnauba wax Wax microparticles |
| Zdroj: | Energy and Buildings. 105:37-42 |
| ISSN: | 0378-7788 |
| Popis: | The hygroscopicity of a wooden material or the ability to absorb, store and release moisture helps to naturally regulate the indoor climate by dampening humidity variations and avoiding extremes. This phenomenon, known as moisture buffering, is an energy-efficient way of moderating moisture levels in a living space, improving air quality, and influencing the health and comfort of the occupants. This work focused on developing a surface treatment that preserves the natural ability of timber to buffer moisture vapor whilst increasing the resistance to liquid water. For this purpose we suggest a method based on a natural non-continuous coating of hydrophobic Carnauba wax particles. The coating was compared, in terms of water repellency and moisture buffering efficiency, to a continuous wax film and conventional coating methods like lacquer and linseed oil. The resistance of the surfaces to liquid water was studied by Contact Angle measurement. Moisture Buffering experiments were conducted by exposing the surfaces to cyclic changes in relative humidity. It was found that coating with wax particles resulted in more hydrophobic surfaces with enhanced moisture buffering ability, whilst the rest of the coatings examined either reduced moisture buffering drastically (wax film, lacquer) or were not sufficiently hydrophobic (linseed oil). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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