Unidirectional self-transport of air bubble via a Janus membrane in aqueous environment
Unidirectional self-transport of air bubble via a Janus membrane in aqueous environment
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水环境中气泡通过 Janus 膜的单向自传输
DOI：
10.1063/1.5052566
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发表时间：
2018
影响因子：
4
通讯作者：
Wu Dong
中科院分区：
文献类型：
--
作者：
Yan Shuguang;Ren Feifei;Li Chuanzong;Jiao Yunlong;Wang Chaowei;Wu Sizhu;Wei Sui;Hu Yanlei;Li Jiawen;Xiao Yi;Su Yahui;Wu Dong
受自然界生物的启发，利用表面微结构对水介质中的气泡进行操控，在工业生产中有着广阔的应用前景。在此，超疏水/亲水的Janus铝膜与锥形阵列的制造飞秒激光钻孔，表面抛光，和随后的抛光去除。与双面亲水或超疏水膜的单一截留或渗透相比，Janus膜表现出独特的单向气泡传输能力。在实验中，引入到下层亲水表面上的气泡可以自发地向上层超疏水表面移动，但在相反的方向上被阻止。对单向迁移的动态过程进行了原位监测，并对单向迁移的物理机制进行了系统研究。此外，还提出了空气参与的化学/物理过程的概念，如注入CO2使紫色石蕊溶液变色，证明了Janus膜的实用性。受自然界生物的启发，水介质中表面微结构对气泡的操纵因其在工业生产中的应用前景而引起了人们的极大关注。在此，超疏水/亲水的Janus铝膜与锥形阵列的制造飞秒激光钻孔，表面抛光，和随后的抛光去除。与双面亲水或超疏水膜的单一截留或渗透相比，Janus膜表现出独特的单向气泡传输能力。在实验中，引入到下层亲水表面上的气泡可以自发地向上层超疏水表面移动，但在相反的方向上被阻止。对单向迁移的动态过程进行了原位监测，并对单向迁移的物理机制进行了系统研究。此外，还论证了空气参与的化学/物理过程的概念，如纸浆的变色、纸浆的干燥、纸浆的干燥等。
Inspired by natural creatures, bubble manipulation by surface microstructures in aqueous media has attracted great attention due to its promising applications in industrial production. Herein, a superhydrophobic/hydrophilic Janus aluminum membrane with tapered micropore arrays was fabricated by femtosecond laser drilling, surface fluorination, and subsequent fluorination removal. Compared with the single interception or penetration of double-faced hydrophilic or superhydrophobic membranes, the Janus membrane showed a distinctive unidirectional air bubble transport ability. In experiment, the air bubbles introduced on the lower hydrophilic surface could spontaneously move to the upper superhydrophobic surface, but they were prevented in the inverse direction. The dynamic process of unidirectional transport was in-situ monitored, and the physical mechanism was systemically investigated. In addition, the concepts of air-participating chemical/physical processes were demonstrated such as discoloration of purple litmus solution by CO2 injection, which proved the Janus membrane practicability.Inspired by natural creatures, bubble manipulation by surface microstructures in aqueous media has attracted great attention due to its promising applications in industrial production. Herein, a superhydrophobic/hydrophilic Janus aluminum membrane with tapered micropore arrays was fabricated by femtosecond laser drilling, surface fluorination, and subsequent fluorination removal. Compared with the single interception or penetration of double-faced hydrophilic or superhydrophobic membranes, the Janus membrane showed a distinctive unidirectional air bubble transport ability. In experiment, the air bubbles introduced on the lower hydrophilic surface could spontaneously move to the upper superhydrophobic surface, but they were prevented in the inverse direction. The dynamic process of unidirectional transport was in-situ monitored, and the physical mechanism was systemically investigated. In addition, the concepts of air-participating chemical/physical processes were demonstrated such as discoloration of purp...