Construction of hydrophobic nano-TiO2 on wood surface and analysis of its anti-photodiscoloration performance

CHANG Huanjun, LIU Sichen, WANG Xiaoqing, LIU Junliang

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (04) : 116-120.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (04) : 116-120. DOI: 10.3969/j.issn.1000-2006.2015.04.020

Construction of hydrophobic nano-TiO2 on wood surface and analysis of its anti-photodiscoloration performance

  • CHANG Huanjun1,2, LIU Sichen1,3, WANG Xiaoqing1,2*, LIU Junliang1,2
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Abstract

Wood surface was modified by nona-TiO2 coating via sol-gel process at room temperature, followed by low surface energy treatment with stearic acid in order to transform the wood surface from hydrophilic to hydrophobic. In the meanwhile, the photostability of wood was also improved due to excellent UV-shielding property of nano-TiO2. The surface morphology, structure and chemistry of the treated wood were studied by field emission scanning electron microscopy(FE-SEM), energy dispersive X-ray analysis(EDX), and fourier transform infrared spectroscopy(FTIR). The hydrophobicity and anti-photodiscoloration performance of treated wood were tested. The results showed that the TiO2 nanoparticles were successfully introduced onto the wood surface, and the long-chain alkyl groups of stearic acid were grafted to provide hydrophobicity. The water contact angles of the treated wood were improved remarkably to approximately 130° displaying high hydrophobicity. The nano-TiO2 films also improved the anti-photodiscoloration performance of wood remarkably. The overall color change(ΔE*)of the wood samples treated with 5% TiO2 sol, was only 45% of the corresponding value of the control samples after 120 h artificial accelerated weathering.

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CHANG Huanjun, LIU Sichen, WANG Xiaoqing, LIU Junliang. Construction of hydrophobic nano-TiO2 on wood surface and analysis of its anti-photodiscoloration performance[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2015, 39(04): 116-120 https://doi.org/10.3969/j.issn.1000-2006.2015.04.020

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