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木材表面纳米TiO2疏水薄膜的构建及抗光变色性能(PDF/HTML)

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

Issue:
2015年04期
Page:
116-120
Column:
研究论文
publishdate:
2015-07-20

Article Info:/Info

Title:
Construction of hydrophobic nano-TiO2 on wood surface and analysis of its anti-photodiscoloration performance
Article ID:
1000-2006(2015)04-0116-05
Author(s):
CHANG Huanjun12 LIU Sichen13 WANG Xiaoqing12* LIU Junliang12
1. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China;
2.Key Lab of Wood Science and Technology of State Forestry Administration, Beijing 100091, China;
3.College of Material Science and Engineering, Central South Forestry Science and Technology University, Changsha 410004, China
Keywords:
wood surface nano-TiO2 hydrophobicity contact angle anit-photodiscoloration
Classification number :
S781
DOI:
10.3969/j.issn.1000-2006.2015.04.020
Document Code:
A
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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Last Update: 2015-07-31