Superhydrophobic wood fabricated by epoxy/Cu₂(OH)₃Cl NPs/stearic acid with performance of desirable self-cleaning, anti-mold, dimensional stability, mechanical and chemical durability
Date
2022
Authors
Lu, Q.
Cheng, R.
Jiang, H.
Xia, S.
Zhan, K.
Yi, T.
Morrell, J.J.
Yang, L.
Wan, H.
Du, G.
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Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2022; 647(29162):1-11
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Abstract
Pinus wood (Pinus sylvestris var. mongolica Litv.) was modified to make it superhydrophobic by a simple hydrothermal method for in-situ synthesis Cu-2(OH)(3)Cl nanoparticles (NPs) followed by impregnation with a stearic acid/epoxy resin (STA/EP) ethanol solution. Surface microstructure, roughness and chemical constituents of the modified wood were characterized by scanning electron microscopy (SEM), 3D confocal microscope profilometry, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Modified wood exhibited super hydrophobicity, characterized by a static water contact angle (WCA) reach 151 /- 3(?) and sliding angle (SA) less than 6 /- 3(?). The modified wood remained superhydrophobicity under harsh conditions including impregnation with strong acid or alkali, 7 cycles of sandpaper abrasion, 200 cycles of tape paste, 192 h of UV irradiation and exposed at 140 ?. The modified wood also exhibited excellent functions, including anti-mold, dimensional stability, stain resistance and self-cleaning, which suggested that the process has potential for protecting wood in exterior exposures.
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Copyright 2022 Elsevier