Superamphiphobic plastrons on wood and their effects on liquid repellence

Materials & Design

Mikko Tuominen¹  Maziar Sedighi Moghaddam²  Magnus Wålinder³  Mimmi Eriksson⁴  Mikael Järn⁴  Haiyan Yin⁴  Andra Dėdinaitė⁴  Agne Swerin⁴ 

[1] Corresponding author at: RISE Research Institutes of Sweden, Division Bioeconomy and Health, Material and Surface Design, Box 5607, SE-114 86 Stockholm, Sweden.;KTH Royal Institute of Technology, School of Architecture and the Built Environment, Department of Civil and Architectural Engineering, Division of Building Materials, SE-100 44 Stockholm, Sweden;KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry, Division of Surface and Corrosion Science, SE-100 44 Stockholm, Sweden;RISE Research Institutes of Sweden, Division Bioeconomy and Health, Material and Surface Design, Box 5607, SE-114 86 Stockholm, Sweden;

关键词: Surface modification;    Superamphiphobicity;    Plastron;    Silicone nanofilaments;    Wood;    Diffusion;   

DOI  :  

来源: DOAJ

【 摘 要 】

The increasing utilization of wood-based products raises new demands for improved durability, for example an enhanced liquid repellence. Superhydrophobic or superamphiphobic surfaces have been widely fabricated. Less attention has been paid to such modifications on wood and the changes of its hygroscopic or solvoscopic properties. In this work, wood veneers were surface modified by hydrophobized silicone nanofilaments. Results revealed that the surface-modified wood showed a superamphiphobic behavior, i.e. it repelled water, ethylene glycol and hexadecane with contact angles greater than 150° and roll-off angles of less than 10°. Most importantly, a plastron effect was observed when the surface-modified wood was submerged in water, ethylene glycol or hexadecane, which reduced the liquid sorption rate and extent to various degrees. By comparing the measured permeabilities and the estimated diffusive mass flux and supported by Hansen solubility parameters and the degrees of swelling, it is concluded that diffusion is the major cause for the liquid uptake in the surface-modified wood. Moreover, the interaction between the liquid and the modified layer (the solubility of the liquid in the modified layer) also needs to be considered, especially in hexadecane.

【 授权许可】

Unknown