Fabrication of microwave absorbing CoFe2O4 coatings with robust superhydrophobicity on natural wood surfaces

Published Date
15 August 2016, Vol.42(11):13199–13206, doi:10.1016/j.ceramint.2016.05.112

Title 
Fabrication of microwave absorbing CoFe₂O₄coatings with robust superhydrophobicity on natural wood surfaces

• Author 

• Wentao Gan ^a
• Likun Gao ^a
• Wenbo Zhang ^a
• Jian Li ^a,,
• Xianxu Zhan ^b

• aMaterial Science and Engineering College, Northeast Forestry University, Harbin 150040, China
• bDehua TB New Decoration Material Co., Ltd., Huzhou 313200, China

Received 20 April 2016. Revised 17 May 2016. Accepted 18 May 2016. Available online 18 May 2016.

Abstract

A superhydrophobic wood surface with microwave absorption property was prepared based on the formation of CoFe₂O₄ nanoparticles and subsequent hydrophobization using fluorinated alkylsilane (FAS). Meanwhile, sticky epoxy resin was worked as a caking agent by adhering abundant of CoFe₂O₄ nanoparticles to wood surface. The as-prepared superhydrophobic coatings on wood maintain stable superhydrophobicity after suffering a significant abrasion. Moreover, the complex permeability and permittivity of the coated wood composites were measured in the frequency range of 2–18 GHz by vector network analysis. The microwave absorption properties were elucidated by the traditional coaxial line method. The results show that the as-prepared wood composites have excellent microwave absorption properties at the frequency of 16 GHz, and the minimum reflection loss can reach −12.3 dB. The approach presented may provide further routes for designing outdoor wood wave absorbers with a specified absorption frequency.

Keywords

Wood

CoFe₂O₄ nanoparticles

Superhydrophobicity

Microwave absorption

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  Corresponding author.

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