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木材表面SiO2/环氧树脂/氟硅烷复合超疏水膜的构建(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年06期
Page:
158-162
Column:
研究论文
publishdate:
2017-11-30

Article Info:/Info

Title:
Fabrication of superhydrophobic SiO2/epoxy resin/fluorinated alkylsilane nanocomposite coatings on wood surfaces
Article ID:
1000-2006(2017)06-0158-05
Author(s):
TU Kunkun KONG Lizhuo WANG Xiaoqing
Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
Keywords:
Keywords:wood surface superhydrophobicity oleophobicity abrasion-resistance silica epoxy resin
Classification number :
S781
DOI:
10.3969/j.issn.1000-2006.201609028
Document Code:
A
Abstract:
【Objective】In order to obtain mechanically durable superhydrophobic wood, a superhydrophobic nanocomposite film using silica/epoxy resin/fluorinated alkylsilane(FAS)was constructed on the wood surface.【Method】Superhydrophobic organic/inorganic nanocomposite coatings were fabricated on wood surfaces via a two-step process, which involved the application of a primer coating of transparent epoxy resin to cover the naturally micro-grooved surface structure, and subsequent construction of a superhydrophobic nanocomposite film using silica/epoxy resin/FAS. The surface morphology and chemistry of the superhydrophobic coatings were characterized by field-emission scanning electron microscopy(FE-SEM), atomic force microscopy(AFM), and fourier transform infrared spectroscopy(FTIR). The hydrophobicity, oleophobicity, and mechanical durability of the coated wood were tested. 【Result】The results indicated that the well-developed microstructures with dual-scale roughness patterns and the low-surface-energy FAS in the coatings are believed to be responsible for the good superhydrophobicity(with a water contact angle of 153° and a sliding angle less than 4°)and oleophobicity(with a glycol contact angle of 146° and a sliding angle less than 11°). The water contact angles and sliding angles of the coated wood exhibited negligible changes after repeated abrasion by sandpaper, indicating sustainable non-wetting properties. Meanwhile, the surface microstructures with dual-scale roughness and the low-surface-energy materials in the coatings were retained, exhibiting remarkable durability against sandpaper abrasion. 【Conclusion】In this organic/inorganic hybrid coating system, the epoxy resin acts as a binder to anchor the SiO2 nanoparticles tightly on the wood substrate, thus endowing the superhydrophobic coatings with remarkable mechanical durability.

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