中国激光, 2020, 47 (10): 1003003, 网络出版: 2020-10-09  

双面神亲/疏水锌箔制备及其气泡运输特性 下载: 969次

Preparation of Janus Zinc Foil and Its Bubble Transport Characteristic
作者单位
1 南通职业大学机械工程学院, 江苏 南通 226007
2 合肥工业大学仪器科学与光电工程学院, 安徽 合肥 230009
3 安徽建筑大学机械与电气工程学院, 安徽 合肥 230601
4 合肥师范学院化学与化学工程学院, 安徽 合肥 230601
摘要
双面神亲/疏膜可用于实现水下气泡的单向运输,在学术研究和工业应用中具有重要的意义。利用纳秒脉冲激光打孔,并结合加热改性工艺,在锌箔上下表面制备出锥形微孔阵列。通过控制激光加工参数,研制出双面神锌箔,其上下表面具有不同的粗糙度和微观结构,并开展了水下气泡单向运动特性研究。通过能谱仪(EDS)对双面神锌箔表面的化学成分进行了分析,结果表明,锌箔上表面的润湿性变化主要归因于激光打孔和加热处理中亲水性羟基的吸附和解吸作用。利用高清工业相机观测水下气泡的动态行为,发现气泡可以在0.6 s内从疏气面渗透到亲气面,但在相反方向则会被堵塞。研究结果显示,在一定范围内,脉冲激光能量的增加不仅可以增大锌箔表面的微孔尺寸并改善锌箔表面疏水性,还可以显著提高气泡的运输速率,气泡在双面神锌箔中的运输特性主要归因于表面微纳结构和化学成分的共同作用。研究结论可为超高速气泡捕捉、输送、收集和气液分离等领域的先进材料设计提供参考。
Abstract
Janus membranes can realize the unidirectional transport of underwater bubbles, which is of great significance to academic research and industrial applications. In this paper, the conical microporous arrays on the upper and lower surfaces of zinc foils are prepared by nanosecond pulsed laser drilling combined with heating treatment. Additionally, the Janus zinc foils, which have the upper and lower surfaces with different roughness and microstructures, are developed through the control of laser processing parameters. Then, the unidirectional transport of underwater bubbles is studied on the prepared foils and the chemical composition of the zinc foil surface is analyzed by an energy dispersive spectrometer (EDS). The results show that the change in the wettability of the zinc foil surface is mainly attributed to the adsorption and desorption of hydrophilic hydroxyl during laser drilling and heating treatment. Observing the dynamic behavior of underwater bubbles by a high-definition industrial camera, we find that the bubbles can penetrate from the aerophobic surface to the aerophilic surface within 0.6 s, but will be blocked in the opposite direction. In addition, the increase in the pulsed laser energy within a certain range can not only increase the micropore size and the hydrophobicity of the zinc foil surface but also significantly raise the transport rate of bubbles. The transport characteristics of bubbles on the Janus zinc foils are mainly attributed to the co-action of surface micro-nano structures and chemical compositions. In a word, this study can provide a new perspective for the design of advanced materials in the fields of ultra-high-speed bubble capture, transport, collection, and gas-liquid separation.

肖轶, 孟东, 徐呈艺, 张瑞华, 姚燕生, 吴思竹, 姚成立. 双面神亲/疏水锌箔制备及其气泡运输特性[J]. 中国激光, 2020, 47(10): 1003003. Xiao Yi, Meng Dong, Xu Chengyi, Zhang Ruihua, Yao Yansheng, Wu Sizhu, Yao Chengli. Preparation of Janus Zinc Foil and Its Bubble Transport Characteristic[J]. Chinese Journal of Lasers, 2020, 47(10): 1003003.

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