超声波辅助溶胶-凝胶法制备TiO_2木材复合材料的物理性质

Study on Physical Properties of Acacia Hybrid Wood TiO_2 Composites Fabricated by Ultrasonic-assisted Sol-gel Method

采用超声波辅助溶胶-凝胶法制备了TiO_2与杂交相思木材复合材料,同时对该材料的物理性质进行测量分析。结果表明:TiO_2木材复合材料的疏水性明显提高,复合材料的接触角均大于132°,说明试验中制备出的复合材料属于疏水性材料;复合材料的吸湿性和体积膨胀率均有所下降,且随超声波处理时间的延长而降低;扫描电子显微镜和X射线能谱分析结果证明,在TiO_2木材复合材料的细胞腔填充了TiO_2纳米颗粒,这是复合材料的性质得到改善的原因。

In this paper, the TiO2 wood composite of acacia hybrid （ Acacia mangium ~ auriculiformis） was achieved by ultrasonic-assisted sol-gel method, and then its physical properties were analyzed. The results showed that the hydrophobicity was significantly improved, and the water contact angle （WCA） was above 132~, indicating that it was extremely hydrophobic. Additionally, the equilibrium moisture content and volumetric swell- ing of composites were reduced, and were decreased with extending the ultrasonic treatment time. Furthermore, the analysis result of field-emission scanning electron microscope （FE - SEM ） and energy-dispersive X-ray （EDX） spectroscopy technique showed that the TiO2 micro- and nanoparticles were located in the inner surfaces of the wood vessels and fibers, then improve the physical properties of acacia hybrid wood.