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基于皮秒激光7075 Al合金超疏水表面的制备及其工艺优化

孙晓雨 孙树峰 王海涛 王津 刘世光 王萍萍

孙晓雨, 孙树峰, 王海涛, 等. 基于皮秒激光7075 Al合金超疏水表面的制备及其工艺优化[J]. 复合材料学报, 2023, 40(6): 3583-3593. doi: 10.13801/j.cnki.fhclxb.20220803.001
引用本文: 孙晓雨, 孙树峰, 王海涛, 等. 基于皮秒激光7075 Al合金超疏水表面的制备及其工艺优化[J]. 复合材料学报, 2023, 40(6): 3583-3593. doi: 10.13801/j.cnki.fhclxb.20220803.001
SUN Xiaoyu, SUN Shufeng, WANG Haitao, et al. Preparation and process optimization of superhydrophobic surface on 7075 Al alloy based on picosecond laser[J]. Acta Materiae Compositae Sinica, 2023, 40(6): 3583-3593. doi: 10.13801/j.cnki.fhclxb.20220803.001
Citation: SUN Xiaoyu, SUN Shufeng, WANG Haitao, et al. Preparation and process optimization of superhydrophobic surface on 7075 Al alloy based on picosecond laser[J]. Acta Materiae Compositae Sinica, 2023, 40(6): 3583-3593. doi: 10.13801/j.cnki.fhclxb.20220803.001

基于皮秒激光7075 Al合金超疏水表面的制备及其工艺优化

doi: 10.13801/j.cnki.fhclxb.20220803.001
基金项目: 国家自然科学基金(51775289);高等学校学科创新引智计划(D21017);山东省重点研发计划项目(2019 GGX104097);青岛西海岸新区2020年度科技源头创新专项资助项目(2020-103)
详细信息
    通讯作者:

    孙树峰,博士,教授,博士生导师,研究方向为激光精密微纳制造 E-mail: shufeng2001@163.com

  • 中图分类号: TN249;TB331

Preparation and process optimization of superhydrophobic surface on 7075 Al alloy based on picosecond laser

Funds: National Natural Science Foundation of China (51775289); The 111 project (D21017); Shandong Key R&D Program (2019 GGX104097); Origin Innovation Project of Qingdao West Coast New Area (2020-103)
  • 摘要: 为在Al合金表面获得稳定的超疏水性能,进一步拓宽Al合金材料在工业领域的应用范围,研究了一种简单、灵活、可靠的超疏水表面制备方法。首先,基于超疏水表面结构特征,采用单因素控制变量法和响应面法对激光加工参数进行了选取和优化。后采用皮秒激光刻蚀和硬脂酸处理相结合的方式获得了(超)疏水表面。通过控制激光扫描间距间接操控表面形貌的方式研究了微纳结构对表面润湿性的影响。利用接触角测量仪、SEM、共聚焦显微镜、FTIR等分析了样品的表面润湿性、形貌及化学成分。结果表明:最佳激光刻蚀参数为:扫描次数2次,扫描速度460 mm/s,频率835 kHz,平均功率21 W;扫描间距为20~80 μm的表面具有超疏水性,扫描间距为100~160 μm的表面具有疏水性。当扫描间距为20、80 μm时,接触角最大为154°,且表面黏附性很低。本文对在金属表面快速获得稳定超疏水性具有指导意义。

     

  • 图  1  气液界面受力分析示意图

    Figure  1.  Schematic diagram of force analysis on gas-liquid interface

    Pd—Total downward force; Pu—Total upward force

    图  2  皮秒激光微加工系统示意图

    Figure  2.  Schematic diagram of the picosecond laser micro-machining system

    M1, M2—Reflecting mirror; F—Focal length; θ—Angle; d—Scan spacing; CCD—Camera system

    图  3  7075 Al合金基体上未处理表面 (a)、激光和硬脂酸处理表面 (b) 的接触角

    Figure  3.  Contact angle of untreated surface (a), laser and stearic acid treated surface (b) on 7075 Al alloy substrate

    图  4  激光和硬脂酸处理后7075 Al合金表面粗糙度与激光扫描间距之间的关系图

    Figure  4.  Relationship between surface roughness of 7075 Al alloy and laser scanning spacing after laser and stearic acid treatment

    图  5  激光和硬脂酸处理后7075 Al合金表面接触角与激光扫描间距的关系图

    Figure  5.  Relationship between surface contact angle of 7075 Al alloy and laser scanning spacing after laser and stearic acid treatment

    图  6  水滴(5 μL)与7075 Al合金表面接触过程图像

    Figure  6.  Image of water droplets (5 μL) in contact with 7075 Al alloy surface

    图  7  不同扫描间距7075 Al合金表面的扫描电镜图及局部放大图

    Figure  7.  SEM and partial enlargement images of 7075 Al alloy surface at different scanning intervals

    图  8  不同扫描间距7075 Al合金表面的三维形貌图 ((a), (b)) 和平均轮廓图 ((c), (d))

    Figure  8.  3D morphologies ((a), (b)) and average contour ((c), (d)) of 7075 Al alloy surface with different scan spacing

    图  9  7075 Al合金表面的自组装单分子膜

    Figure  9.  Self-assembled monolayer on 7075 Al alloy surface

    图  10  改性前后7075 Al合金表面的FTIR图谱

    Figure  10.  FTIR spectra of 7075 Al alloy surface before and after modification

    图  11  7075 Al合金表面接触角与磨损周期之间的关系图

    Figure  11.  Relationship between surface contact angle of 7075 Al alloy and abrasion cycles

    表  1  7075 Al合金成分表

    Table  1.   Chemical composition of 7075 Al alloy

    ElementSiFeCuMnMgCrZnTiAl
    Mass fraction/wt%≤0.4≤0.51.2-2.0≤0.32.1-2.90.18-0.285.1-6.1≤0.2Bal
    下载: 导出CSV

    表  2  单因素控制变量法试验方案

    Table  2.   Test scheme of single factor control variable method

    A/nB/(mm·s−1)C/μmD/kHzE/W
    1-8500450021
    4200-900450021
    45000-1450021
    45004200-90021
    450045009-30
    Notes: A—Number of scanning; B—Scanning speed; C—Feed distance; D—Laser frequency; E—Average power.
    下载: 导出CSV

    表  3  因素水平表

    Table  3.   Factor levels table

    FactorsFactor levels
    Low value (−1)Median value (0)High value (1)
    A/n234
    B/(mm·s−1)400500600
    C/μm048
    D/kHz700800900
    E/W212427
    下载: 导出CSV

    表  4  正交试验方案及结果

    Table  4.   Scheme and results of orthogonal test

    Experimental groupA/nB/(mm·s−1)C/μmD/kHzE/WL/μmD/μm
    1 3 500 0 700 24 107.38 6.23
    2 3 500 4 800 24 102.17 5.65
    3 3 600 8 800 24 101.31 5.99
    4 4 500 8 800 24 97.88 7.51
    5 4 400 4 800 24 107.45 8.33
    6 3 500 4 800 24 103.03 7.54
    7 3 400 0 800 24 104.16 7.85
    8 3 500 0 800 27 104.07 7.74
    9 2 500 4 800 21 96.58 5.29
    10 3 500 4 700 21 106.31 7.55
    11 3 500 4 900 27 97.40 7.06
    12 3 500 0 800 21 99.28 6.55
    13 3 500 8 800 27 104.04 7.48
    14 3 600 4 800 27 101.45 6.45
    15 3 400 8 800 24 100.73 6.80
    16 3 500 4 800 24 103.92 7.29
    17 3 400 4 800 27 99.11 7.54
    18 3 600 4 900 24 102.23 6.58
    19 4 500 4 800 21 105.66 7.54
    20 3 500 4 900 21 95.65 6.60
    21 3 500 4 800 24 99.02 6.89
    22 3 500 8 700 24 104.06 7.25
    23 4 500 0 800 24 101.41 8.49
    24 3 400 4 700 24 106.74 8.11
    25 2 500 4 900 24 94.54 5.62
    26 2 500 8 800 24 97.24 5.71
    27 4 600 4 800 24 103.49 7.51
    28 2 500 4 700 24 106.90 6.16
    29 4 500 4 800 27 102.23 7.89
    30 3 500 4 700 27 105.72 6.88
    31 3 500 8 800 21 100.14 6.25
    32 3 500 4 800 24 96.10 6.64
    33 3 600 0 800 24 99.16 6.03
    34 3 600 4 700 24 103.16 6.59
    35 3 500 4 800 24 99.92 6.36
    36 4 500 4 700 24 109.18 8.16
    37 3 400 4 800 21 100.14 6.82
    38 3 600 4 800 21 99.54 6.19
    39 3 400 4 900 24 98.52 6.83
    40 2 500 4 800 27 96.62 4.38
    41 2 600 4 800 24 94.09 4.83
    42 3 500 0 900 24 96.22 6.60
    43 3 500 8 900 24 94.53 5.60
    44 2 500 0 800 24 95.60 5.21
    45 2 400 4 800 24 96.82 5.52
    46 4 500 4 900 24 98.64 8.28
    Notes: L—Width; D—Depth.
    下载: 导出CSV

    表  5  微槽宽度和深度二次多项式模型的方差分析(ANOVA)

    Table  5.   Analysis of variance (ANOVA) of quadratic polynomial model for the depth and width of the microgroove

    SourceSum of squaresdfMean squareF-valueP-value
    Width Model 1 539.03 20 26.95 3.85 0.0009 Significant
    Residual 175.07 25 7.00
    Lack of fit 132.56 20 6.63 0.7796 0.6898 Not significant
    Pure error 42.51 5 8.50
    Cor total 714.10 45
    Depth Model 2 36.48 20 1.82 7.06 <0.0001 Significant
    Residual 6.46 25 0.2584
    Lack of fit 4.15 20 0.2075 0.4493 0.9082 Not significant
    Pure error 2.31 5 0.4618
    Cor total 42.94 45
    Notes: df—Degree of freedom; F—Statistical value of F-test; P—Assumed value.
    下载: 导出CSV

    表  6  试验与预测结果对比表

    Table  6.   Comparison table of experimental and predicted results

    No.Width/μmRelative error rate/%Depth/μmRelative error rate/%
    Test resultsPredictive valueTest resultsPredictive value
    193.8593.390.495.305.391.67
    296.263.075.154.45
    392.431.035.125.00
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-06-08
  • 修回日期:  2022-07-04
  • 录用日期:  2022-07-19
  • 网络出版日期:  2022-08-03
  • 刊出日期:  2023-06-15

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