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碱式硫酸镁晶须复合SiO2纳米粒子制备高/低黏附性超疏水涂层

吴鹏 乃学瑛 刘鑫 董亚萍 李武

吴鹏, 乃学瑛, 刘鑫, 等. 碱式硫酸镁晶须复合SiO2纳米粒子制备高/低黏附性超疏水涂层[J]. 复合材料学报, 2023, 40(1): 334-341. doi: 10.13801/j.cnki.fhclxb.20220303.003
引用本文: 吴鹏, 乃学瑛, 刘鑫, 等. 碱式硫酸镁晶须复合SiO2纳米粒子制备高/低黏附性超疏水涂层[J]. 复合材料学报, 2023, 40(1): 334-341. doi: 10.13801/j.cnki.fhclxb.20220303.003
WU Peng, NAI Xueying, LIU Xin, et al. Fabrication of high and low adhesive superhydrophobic coatings with magnesium oxysulfate whiskers and SiO2 nanoparticles[J]. Acta Materiae Compositae Sinica, 2023, 40(1): 334-341. doi: 10.13801/j.cnki.fhclxb.20220303.003
Citation: WU Peng, NAI Xueying, LIU Xin, et al. Fabrication of high and low adhesive superhydrophobic coatings with magnesium oxysulfate whiskers and SiO2 nanoparticles[J]. Acta Materiae Compositae Sinica, 2023, 40(1): 334-341. doi: 10.13801/j.cnki.fhclxb.20220303.003

碱式硫酸镁晶须复合SiO2纳米粒子制备高/低黏附性超疏水涂层

doi: 10.13801/j.cnki.fhclxb.20220303.003
基金项目: 青海省科技厅项目 (2019-ZJ-7029)
详细信息
    通讯作者:

    乃学瑛,博士,副研究员,硕士生导师,研究方向为低维材料的制备及应用 E-mail: naixy@isl.ac.cn

  • 中图分类号: TB332;O647.5

Fabrication of high and low adhesive superhydrophobic coatings with magnesium oxysulfate whiskers and SiO2 nanoparticles

Funds: Qinghai Provincial Science and Technology Department Project (2019-ZJ-7029)
  • 摘要: 超疏水材料因性能独特,应用前景广阔而被广泛关注。本文采用碱式硫酸镁晶须(MOSWs)与二氧化硅纳米粒子制备超疏水涂层,首先对MOSWs及50 nm、500 nm SiO2进行表面改性以降低表面能,然后基于混料实验将三者按比例混合以构造表面粗糙度,以接触角、滚动角及平均粗糙度Ra为响应变量建立回归模型,分析了混合分量的形貌、尺寸与混合比例对响应变量的影响,并探讨了超疏水涂层微观结构对水滴黏附性的影响以及粗糙度与超疏水性能之间的关系。结果表明:MOSWs复合SiO2纳米粒子可制备具有不同黏附性的超疏水涂层,单独使用MOSWs可制备高黏附性超疏水涂层,其接触角达152.59°,涂层水平倒置水滴不滴落;而MOSWs与50 nm SiO2以相同质量分数混合,可制备低黏附性超疏水涂层,其接触角达163.25°,滚动角可趋近0°。所制备涂层的平均粗糙度Ra值位于5~10 μm之间时,接触角较大,滚动角较小,超疏水性能较佳。

     

  • 图  1  混料分量的表面改性及超疏水涂层制备示意图

    Figure  1.  Schematic diagram of the surface modification of mixture components and the fabrication of superhydrophobic coating

    TEOS—Tetraethyl silicate; MOSWs—Magnesiumoxysulfate whiskers; OTS—Octadecyl trichlorosilane

    图  2  不同配方制备涂层的接触角与滚动角混合等值线图

    Figure  2.  Mixed contour plots of contact angle and sliding angle of coatings with different preparation formulations

    图  3  MOSWs单组分超疏水涂层的接触角(CA) (a)及水滴黏附性 (b)

    Figure  3.  Contact angle (CA) (a) and water droplet adhesion (b) of the superhydrophobic coating fabricated by MOSWs single component

    图  4  MOSWs混合50 nm SiO2制备超疏水涂层的接触角(a)及滚动角((b)、(c))

    Figure  4.  Contact angle (a) and sliding angle ((b), (c)) of the superhydrophobic coating prepared by mixing MOSWs and 50 nm SiO2

    图  5  混料实验中涂层接触角与滚动角的重叠等值线图

    Figure  5.  Overlaid contour plot of contact angle and sliding angle of coatings in the mixture design

    图  6  水滴与涂层表面的接触线示意图

    Figure  6.  Schematic diagram of the contact line between the water droplet and the coating surface

    图  7  超疏水涂层的SEM图像:(a) 由MOSWs单组分制备;(b) 由MOSWs (70wt%)与50 nm SiO2(30wt%)的混合组分制备

    Figure  7.  SEM images of the superhydrophobic coatings fabricated by MOSWs (a) and mixing MOSWs (70wt%) and 50 nm SiO2(30wt%) (b)

    图  8  不同配方制备涂层的平均粗糙度混合等值线图

    Figure  8.  Mixed contour plot of average roughness of coatings prepared with different formulations

    图  9  超疏水涂层的三维轮廓图像:(a) MOSWs单组分制备;(b) MOSWs (70wt%)与50 nm SiO2 (30wt%)的混合组分制备

    Figure  9.  Surface profile of superhydrophobic coatings prepared by MOSWs (a) and mixing MOSWs (70wt%) and 50 nm SiO2 (30wt%) (b)

    Rp—Peak roughness; Rv—Valley roughness

    图  10  混料实验中涂层平均粗糙度与接触角、滚动角的等值线图

    Figure  10.  Contour plot of contact angle, sliding angle and average roughness of coatings in the mixture design

    表  1  混料实验设计表及3个响应变量的测试结果

    Table  1.   Mixture design table and test results of three response variables

    Standard orderMix proportion of
    A
    (50 nm SiO2)/wt%
    Mix proportion of
    B
    (500 nm SiO2)/wt%
    Mix proportion of
    C (MOSWs)/wt%
    Contact angle/(°)Sliding angle/(°)Average roughness Ra/μm
    10 0.167 0.167 0.667 159.51 3.8 12.36
    9 0.167 0.667 0.167 156.81 5.4 10.92
    8 0.667 0.167 0.167 159.74 0.8 6.04
    5 0.500 0.000 0.500 163.25 0.1 7.40
    7 0.333 0.333 0.333 160.53 3.3 8.94
    2 0.000 1.000 0.000 158.45 0.1 22.70
    1 1.000 0.000 0.000 158.10 0.1 2.29
    3 0.000 0.000 1.000 152.59 180.0 14.60
    6 0.000 0.500 0.500 159.55 13.2 15.45
    4 0.500 0.500 0.000 158.59 1.4 5.18
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-12-21
  • 修回日期:  2022-02-04
  • 录用日期:  2022-02-19
  • 网络出版日期:  2022-03-07
  • 刊出日期:  2023-01-15

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