Superhydrophobic wood surface fabricated by Cu2O nano-particles and stearic acid: its acid/alkali and wear resistance
Superhydrophobic wood surface fabricated by Cu2O nano-particles and stearic acid: its acid/alkali and wear resistance
复制标题
Cu2O纳米颗粒与硬脂酸制备的超疏水木材表面：耐酸碱及耐磨性
DOI：
10.1515/hf-2020-0219
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发表时间：
2021-04
期刊：
影响因子：
2.4
通讯作者：
Wei Gao
中科院分区：
文献类型：
--
作者：
Ke Zhan;Sengwei Xia;Quanxiong Lu;Ruifeng Cheng;Haiqiu Jiang;Tengfei Yi;Jeffrey Morrell;Long Yang;Linkun Xie;Hong Lei;Guanben Du;Wei Gao
摘要降低木材的亲水性可以提高尺寸稳定性，改善生命周期性能。通过在马尾松和山核桃木材表面喷洒Cu2O纳米粒子(Cu2O NPs)/酚醛(PF)树脂混合溶液，然后将其浸泡在硬脂酸乙醇溶液中，对马尾松和山核桃木材进行了改性，以产生超疏水、自清洁功能。研究了不同浓度氯化铜(CuCl2)制备的两种Cu2O纳米粒子对木材表面疏水性的改善作用。在改性山核桃木材表面发现了Cu2O纳米颗粒边缘特殊的花瓣状结构，两种改性木材的水接触角均达到155°左右，滑移角均小于10°。同时，在pH=1~13的水溶液中，具有较低的液体渗透率和良好的排斥性。在强酸(pH=2)和强碱(pH=12)溶液中浸泡12h后，改性木材表面的临界WCA也保持在150°左右，而且经过严酷的磨损试验后，获得了显著的机械耐久性，这归因于固化的PF树脂胶粘剂具有较高的粘接强度。这种高度防水、耐酸碱、耐磨的超疏水表面在木制品工业中具有广泛的应用潜力。
Abstract Reducing the hydrophilic nature of wood could enhance dimensional stability and improve life cycle performance. Masson pine and pecan wood were modified to create superhydrophobic, self-cleaning functions by spray-coating with Cu2O nano-particles (Cu2O NPs)/phenol formaldehyde (PF) resin mixed solution followed by immersion in a stearic acid ethanol solution. Two types of Cu2O NPs, derived from different concentrations of copper chloride (CuCl2) were evaluated for their ability to improve hydrophobicity of wood surface. A special petal-shaped structure on the edge of Cu2O NPs was found on modified pecan wood, and water contact angles (WCA) of both kind of modified wood reached around 155° and sliding angles (SA) less than 10°. Meanwhile, low liquid permeability and excellent repellency to aqueous solutions with pH = 1 to 13 were achieved. The critical WCA around 150° was also maintained on modified wood surfaces after being immersed in strong acid (pH = 2) and strong alkali (pH = 12) solutions for 12 h. Furthermore, remarkable mechanical durability was obtained after harsh abrading test, which could be attributed to the high bond strength from cured PF resin adhesive. Such highly waterproof, acid/alkali resistant and hard-wearing superhydrophobic surface must have potential to be widely applied in wood products industry.
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酚醛树脂胶粘剂中纳米氧化铜的制备：合成、固化特性和形貌
影响因子：
3.4
作者：
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DOI：
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DOI：
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发表时间：
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期刊：
Molecules (Basel, Switzerland)
影响因子：
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作者：
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Fujishima A