预润湿对激光诱导铝基超疏/亲水表面润湿性的影响

郑志霞, 杨焕. 预润湿对激光诱导铝基超疏/亲水表面润湿性的影响[J]. 光电工程, 2019, 46(8): 190022. doi: 10.12086/oee.2019.190022
引用本文: 郑志霞, 杨焕. 预润湿对激光诱导铝基超疏/亲水表面润湿性的影响[J]. 光电工程, 2019, 46(8): 190022. doi: 10.12086/oee.2019.190022
Zheng Zhixia, Yang Huan. Effect of pre-wetting on the wettability of laser ablated Al superhydrophobic/superhydrophilic surface[J]. Opto-Electronic Engineering, 2019, 46(8): 190022. doi: 10.12086/oee.2019.190022
Citation: Zheng Zhixia, Yang Huan. Effect of pre-wetting on the wettability of laser ablated Al superhydrophobic/superhydrophilic surface[J]. Opto-Electronic Engineering, 2019, 46(8): 190022. doi: 10.12086/oee.2019.190022

预润湿对激光诱导铝基超疏/亲水表面润湿性的影响

  • 基金项目:
    福建省科技厅基金资助项目(2017H0032);福建省激光精密加工工程技术研究中心开放基金资助项目(2017JZA001)
详细信息
    通讯作者: 郑志霞(1972-),女,教授,主要从事传感器及微纳加工技术的研究。E-mail:1259900841@qq.com
  • 中图分类号: TB872

Effect of pre-wetting on the wettability of laser ablated Al superhydrophobic/superhydrophilic surface

  • Fund Project: Supported by the Natural Science Foundation of Fujian (2017H0032) and the Open Project Program of Laser Precision Machining Engineering Technology Research Center of Fujian Province (2017JZA001)
More Information
  • 通过激光烧蚀制备了区域可控的超疏水/超亲水混合表面,研究了预润湿对水下和油下样品表面润湿性的影响,以及样品表面润湿的稳定性。结果表明,预润湿会改变样品表面的油下水接触角及水下油接触角,也会改变气泡在其表面的行为;样品经水浸泡、受热或曝露空气后,超亲水表面出现润湿性转变而超疏水表面较稳定。样品常温下密封保存能长期保持稳定性。研究结果对油水分离、油气分离、水性介质中的气泡控制具有重要意义。

  • Overview:The special wettabilities of solid surfaces have important roles in self-cleaning, anti-corrosion, anti-icing, resistance reduction, anti-bacterial, oil-water separation, oil-water-gas separation, and so on. In recent years, the research on special wettability has gradually developed from solid/water two-phase to solid/water/oil/air four-phase systems. It is of great significance to study the special wettability of superhydrophobic/superhydrophilic surface in water, oil, and the behavior of bubbles on it. This type of surface can be applied to oil-water separation, underwater bubble location and collection, liquid transportation and so on. By controlling the laser processing parameters, such as wavelength, pulse width, frequency, and scanning speed, the micro-nano scale structure with special wettability can be fabricated on the surfaces of various materials. In this paper, micro-nano scale structures on aluminum substrates were fabricated by a pulsed fiber laser, and superhydrophobic surfaces were prepared with a subsequent chemical modification. With a designed pattern, a secondary laser processing was conducted to remove the chemical layer on the superhydrophobic surface, then a superhydrophobic/superhydrophilic mixed surface was achieved. The effect of pre-wetting on the special wettability and the wetting stability of the samples were studied. The results showed that, for the superhydrophobic/superhydrophilic mixed surface, the wetting behaviors in water, in oil, and the corresponding behaviors of bubbles were closely related to wettability in air. The superhydrophobic surface exhibited superoleophilicity and superaerophilicity in water, and the superhydrophilic surface exhibited superoleophobicity and superaerophobicity in water. Besides, in oil, both superhydrophobic and superhydrophilic surfaces exhibited superaerophobicity and superhydrophobicity. The pre-wetting could influence the wettability in liquid. After pre-wetting with an oil, the superhydrophobic and superhydrophilic surface exhibited both superaerophobicity and superoleophilicty in water. Moreover, after pre-wetting with water, the superhydrophobic surface is superaerophobicity and superhydrophobicity in oil, while the superhydrophilic surface is superaerophobicity and superhydrophilicity. The stability test of the wettability for the superhydrophobic/superhydrophilic mixed surface shows that the wettability can be kept stable for a long time by drying and sealing under normal temperature. It is of great significance to study the underwater and under oil wettabilities of the superhydrophobic/superhydrophilic mixed surface, as well as the influence of pre-wetting on the wettability in oil and water, for controlling oil/water/gas and promoting the application of super hydrophobic/superhydrophilic mixed surfaces.

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  • 图 1  超疏水/超亲水混合表面制备过程。(a)超疏水/超亲水混合表面制备流程示意图;(b)超亲水、超疏水/超亲水混合表面的样本

    Figure 1.  Preparation of superhydrophobic/superhydrophilic mixed surfaces. (a) Procedures for SH surfaces and the hybrid SH/SHL surface; (b) Patterns for SH and hybrid SH/SHL surfaces

    图 2  激光烧蚀铝板表面的SEM图像。(a)大面积视图;(b)进一步放大的单周期单元的图像;(c)微沟槽边缘的图像;(d)微纳米粒子的高倍率图像

    Figure 2.  SEM images of laser textured aluminum surface. (a) Large-area view; (b) Further magnified image of a single periodic unit; (c) Enlarged view of a microgroove; (d) Higher magnification image of micro/nano-particle aggregates

    图 3  空气中水润湿性和油润湿性、水下油润湿性、油下水润湿性、水下及油下气泡的行为以及预润湿对水下及油下润湿性的影响。(a), (b)空气中样品表面的水滴;(c), (d)空气中样品表面的油滴;(e), (f)水下样品表面的气泡;(g), (h)水下样品表面的油滴;(i), (j), (k), (l)水下油预润湿的样品表面的油滴和气泡;(m), (n)油下样品表面的气泡和水滴;(o), (p), (q)油下水预润湿的样品表面的水滴和气泡

    Figure 3.  Water wettability and oil wettability in air, underwater oil wettability and under-oil water wettability, underwater and under-oil bubble's behavior on the surface, and the influence of pre-wetting on wettability under water and oil. (a), (b) Water droplet on the sample surface in air; (c), (d) Oil droplet on the sample surface in air; (e), (f) Bubble on the sample surface in water; (g), (h) Oil droplet on the sample surface in water; (i), (j), (k), (l) After oil pre-wetting the sample, the bubble and oil droplet on the sample surface in water; (m), (n) Bubble and water on the sample surface in oil; (o), (p), (q) After water pre-wetting the sample, water droplet and bubble on the sample surface in oil

    图 4  样品表面润湿性形成机理。(a), (b)超疏水和超亲水表面的水滴;(c), (d)超疏水和超亲水表面的油滴;(e), (f)水下样品表面的气泡;(g), (h)水下样品表面的油滴;(i)油下样品表面的气泡;(j)油下样品表面的水滴;(k)水下油预润湿的样品表面的气泡;(l)水下油预润湿的样品表面的油滴;(m), (n)油下水预润湿的样品表面的气泡;(o), (p)油下水预润湿的样品表面的水滴

    Figure 4.  Mechanism of oil wettability in water and water wettability in oil. (a), (b) Water droplet on superhydrophobic and superhydrophilic surfaces; (c), (d) Oil droplet on superhydrophobic and superhydrophilic surfaces; (e), (f) Bubble on the surface of sample underwater; (g), (h) Oil droplet on the surface of underwater sample; (i) Bubble on the surface of under-oil sample; (j) Water droplet on the surface of under-oil sample; (k) Bubble on the oil prewetting sample's surface in water; (l) Oil droplet on the water prewetting sample's surface in water; (m), (n) Bubble on the water prewetting sample's surface in oil; (o), (p) Water droplet on the water prewetting sample's surface in oil

    图 5  润湿性与曝露时间、浸泡时间、加热温度的关系。(a)润湿性与样品空气中曝露时间的关系;(b)润湿性与样品水下浸泡时间的关系;(c)纯超疏水和超亲水表面的润湿性与水下浸泡时间的关系;(d)润湿性与热板温度的关系

    Figure 5.  Relationship between wettability and exposure time, soaking time and heating temperature. (a) Relationship between wettability and time of exposure to air; (b) Relationship between wettability and immersion time; (c) The relationship between wettability of pure superhydrophobic or superhydrophilic surface and immersion time; (d) The relationship between wettability and heating temperature of hot plate

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出版历程
收稿日期:  2019-01-05
修回日期:  2019-04-06
刊出日期:  2019-08-01

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