Fabrication of repairable anti-corrosive superhydrophobic surfaces with micro-nano structures by ultrasonic cavitation
Fabrication of repairable anti-corrosive superhydrophobic surfaces with micro-nano structures by ultrasonic cavitation
复制标题
超声空化法制备微纳结构可修复防腐超疏水表面
DOI：
10.1016/j.apsusc.2020.148605
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发表时间：
2020-11
影响因子：
6.7
通讯作者：
Huang Shuai
中科院分区：
文献类型：
--
作者：
Chen Fengjun;Du Jianhua;Huang Shuai
提出了一种基于超声空化的超疏水制备方法。空化气泡的崩塌侵蚀了表面，形成了高粗糙度的微观结构。然后利用空化射流将sio2纳米颗粒有效地锚定在表面，形成微纳复合结构。以水接触角（WCA）为指标评价了超疏水性能。该方法获得了良好的超疏水性能，铜、黄铜和304不锈钢基体的WCA均超过153.3°。利用扫描电子显微镜和傅里叶变换红外光谱分别表征了超疏水表面的形貌和组成。结果表明：sio2颗粒均匀分散，表面无缺陷；样品在紫外线和室外测试以及浸泡在不同腐蚀性溶液中均表现出优异的耐腐蚀性。空化侵蚀产生的空腔可以作为抑制有效组分损失的容器。保留了微纳双层结构，通过再次功能化使WCA恢复到原来的水平，具有较低的表面能。制备的超疏水表面是可修复的。泡沫铜和海绵的wca分别为157.0°和159.6°。
We proposed a novel superhydrophobic fabrication method based on ultrasonic cavitation. The collapse of cavitation bubbles eroded the surface to form a microstructure with high roughness. SiO2nanoparticles were then effectively anchored on the surface using cavitation jets to form a micro-nano composite structure. The superhydrophobic performance was evaluated on the basis of the water contact angle (WCA). The proposed method achieved robust superhydrophobic property, and the WCA of copper, brass and 304 stainless steel substrates exceeded 153.3°. The morphology and composition of the superhydrophobic surfaces were characterized using scanning electron microscopes and Fourier transform infrared, respectively. Results revealed that the SiO2particles were uniformly dispersed, and a flaw-free state was obtained by the surface. The samples exhibited excellent anti-corrosive durability during ultraviolet and outdoor testing and immersion in different corrosive solutions. The cavity generated by the cavitation erosion can be used as a container to suppress the loss of effective components. The micro-nano double layer structure was retained, and the WCA can be restored to the original level through functionalization again to give low surface energy. The prepared superhydrophobic surface was repairable. In addition, the WCAs of the copper foam and sponge were 157.0° and 159.6°, respectively.
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影响因子：
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