Construction of hydrophobic wood surfaces by room temperature deposition of rutile (TiO2) nanostructures
Construction of hydrophobic wood surfaces by room temperature deposition of rutile (TiO2) nanostructures
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DOI：
10.1016/j.apsusc.2014.12.083
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发表时间：
2015-02
影响因子：
6.7
通讯作者：
Rongbo Zheng;M. Tshabalala;Qingyu Li;Hongyan Wang
中科院分区：
文献类型：
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作者：
Rongbo Zheng;M. Tshabalala;Qingyu Li;Hongyan Wang
采用室温下饱和NaCl溶液中TiCl 3直接水解结晶法在木材表面生长金红石型TiO 2分级结构。采用扫描电镜（SEM）和X射线衍射（XRD）对木材表面包覆TiO 2的形貌和晶体结构进行了表征。木材表面的TiO 2形貌可以通过简单地改变反应时间或反应混合物的pH值来调节。经全氟癸基三乙氧基硅烷（PFOS）改性后，TiO 2处理的木材（T1）表面的水接触角（WCA）增加到140.0 ± 4.2°，表明木材表面具有高度疏水性。此外，与未处理的对照木材相比，PFDTS-TiO 2处理（PFDTS-T1处理）不仅降低了木材的液态水吸收，而且推迟了木材基材的水分饱和点。PFDTS-T1处理的木材在24小时的水浸后的重量变化为19.3%，相比之下，未处理的对照木材的重量变化为81.3%。浸水867 h后，处理和未处理木材试样的重量变化分别为117.1%和155.1%。未处理的对照木材在187 h后达到稳定状态，而PFDTS-T1处理的木材直到浸泡600 h后才达到稳定状态。
A convenient room temperature approach was developed for growing rutile TiO2hierarchical structures on the wood surface by direct hydrolysis and crystallization of TiCl3in saturated NaCl aqueous solution. The morphology and the crystal structure of TiO2coated on the wood surface were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The TiO2morphology on the wood surface could be tuned by simply changing either the reaction time or pH value of the reaction mixture. After modification with perfluorodecyltriethoxysilane (PFDTS), the water contact angle (WCA) of the TiO2-treated wood (T1) surface increased to 140.0 ± 4.2°, which indicated a highly hydrophobic wood surface. In addition, compared with untreated control wood, PFDTS-TiO2treatment (PFDTS-T1-treated) not only reduced liquid water uptake, but also delayed the onset of water saturation point of the wood substrate. The weight change of PFDTS-T1-treated wood after 24 h of water immersion was 19.3%, compared to 81.3% for the untreated control wood. After 867 h of water immersion, the weight change for the treated and untreated wood specimens was 117.1%, and 155.1%, respectively. The untreated control wood reached the steady state after 187 h, while the PFDTS-T1-treated wood did not reach the steady state until after 600 h of immersion.