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纳米SiO2@超支化PDMS复合超疏水涂层的制备与性能调控

刘静 雷西萍 于婷 陈浩男 樊凯

刘静, 雷西萍, 于婷, 等. 纳米SiO2@超支化PDMS复合超疏水涂层的制备与性能调控[J]. 复合材料学报, 2023, 40(2): 872-883. doi: 10.13801/j.cnki.fhclxb.20220331.002
引用本文: 刘静, 雷西萍, 于婷, 等. 纳米SiO2@超支化PDMS复合超疏水涂层的制备与性能调控[J]. 复合材料学报, 2023, 40(2): 872-883. doi: 10.13801/j.cnki.fhclxb.20220331.002
LIU Jing, LEI Xiping, YU Ting, et al. Construction and property regulation of nano-SiO2@hyperbranched PDMS composite superhydrophobic coating[J]. Acta Materiae Compositae Sinica, 2023, 40(2): 872-883. doi: 10.13801/j.cnki.fhclxb.20220331.002
Citation: LIU Jing, LEI Xiping, YU Ting, et al. Construction and property regulation of nano-SiO2@hyperbranched PDMS composite superhydrophobic coating[J]. Acta Materiae Compositae Sinica, 2023, 40(2): 872-883. doi: 10.13801/j.cnki.fhclxb.20220331.002

纳米SiO2@超支化PDMS复合超疏水涂层的制备与性能调控

doi: 10.13801/j.cnki.fhclxb.20220331.002
基金项目: 生态环境相关高分子材料教育部重点实验室开放基金(KF-18-01);西安建筑科技大学基础研究基金(ZR21026)Open Foundation Provided by Key Laboratory of Eco-functional Polymer Materials of Ministry of Education (KF-18-01); Basic Research Foundation of Xi'an University of Architecture and Technology (ZR21026)
详细信息
    通讯作者:

    雷西萍,博士,教授,博士生导师,研究方向为超疏水材料 E-mail: leixiping123456@163.com

  • 中图分类号: TB332

Construction and property regulation of nano-SiO2@hyperbranched PDMS composite superhydrophobic coating

  • 摘要: 超疏水涂层在实际应用中受化学腐蚀、刮擦磨损等外界环境的影响,易造成涂层老化、开裂甚至脱落,造成涂层失效。因此,针对这一问题,设计出具备耐候性的自修复超疏水表面:以超支化聚二甲基硅氧烷为柔性基底和低表面能物质,引入纳米二氧化硅构筑表面粗糙结构,制备超疏水涂层。当SiO2粒径为50 nm、固含量为30wt%时,得到了接触角为154.87°的超疏水涂层。经过5次胶带剥离试验,涂层表现出良好的机械稳定性。经历10次温差循环试验和24 h紫外光照射后,涂层表面接触角仍大于150°,表明涂层具有良好的耐候性。涂层经过80℃、2 h的热处理可修复划痕,表明该涂层具有一定的自修复功能。同时,Tafel及Nyquist测试结果表明,对基底进行超疏水处理可显著提高防腐性能,并且该涂层具有明显的自清洁效果。综上所述,本文所制备的纳米SiO2@超支化聚二甲基硅氧烷(PDMS)复合超疏水涂层具有自修复功能,为自修复超疏水涂层的开发提供了新的研究策略。

     

  • 图  1  超疏水涂层的制备过程示意图

    TMC—Trimesoyl chloride; A-PDMS—Diaminopropyl terminated polydimethylsiloxane; HB-PDMS—Hyperbranched polydimethylsiloxane; SiO2@HB-PDMS—SiO2@hyperbranched polydimethylsiloxane composite

    Figure  1.  Schematic diagram of preparation of superhydrophobic coating

    图  2  超支化聚二甲基硅氧烷(HB-PDMS)的反应机制和复合涂层化学结构表征:(a)HB-PDMS的化学结构;(b)A-PDMS、均苯三甲酰氯(TMC)和HB-PDMS的1H NMR图谱;HB-PDMS的13C NMR图谱(c)和凝胶渗透色谱(GPC)分子量分布曲线(d);(e)A-PDMS、HB-PDMS、SiO2和SiO2@HB-PDMS涂层的FTIR图谱

    Figure  2.  Reaction mechanism of hyperbranched-polydimethyl siloxane (HB-PDMS) and chemical structure characterization of composite coatings: (a) Chemical structure of HB-PDMS; (b) 1H NMR spectra of A-PDMS, trimesoyl chloride (TMC) and HB-PDMS; 13C NMR spectra (c) and molecular weight distribution curves (d) of gel permeation chromatography (GPC) of HB-PDMS; (e) FTIR spectra of A-PDMS, HB-PDMS, SiO2 and SiO2@HB-PDMS coatings

    δ—Chemical shift; THF—Tetrahydrofuran; dw/dlgM—Quantity distribution of polymers with different molecular weights

    图  3  不同SiO2粒径及固含量对SiO2@HB-PDMS复合涂层润湿性的影响

    Figure  3.  Effect of different SiO2 particle size and solid content on the wettability of SiO2@HB-PDMS composite coatings

    图  4  SiO2@HB-PDMS超疏水涂层的胶带剥离测试结果

    Figure  4.  Tape peeling test results of SiO2@HB-PDMS superhydrophobic coatings

    图  5  添加不同固含量SiO2纳米颗粒的SiO2@HB-PDMS复合涂层的微观形貌((a)~(d))与元素组成(e)

    Figure  5.  Microstructure ((a)-(d)) and elemental composition (e) of SiO2@HB-PDMS composite coatings with different solid content of SiO2 nanoparticles

    图  6  超支化PDMS涂层((a), (b))和SiO2@HB-PDMS超疏水涂层((c)~(f))的自修复光学显微镜照片;差示扫描量热曲线(g)和修复前后Tafel测试结果((h), (i))

    Figure  6.  Self-healing optical microscope images of hyperbranched-PDMS coatings ((a), (b)) and SiO2@HB-PDMS superhydrophobic coatings ((c)-(f)), DSC curves (g) and Tafel results ((h), (i)) before and after self-healing of hyperbranched-PDMS coatings and SiO2@HB-PDMS superhydrophobic coatings

    Tg—Glass transition temperature; i—Corrosion current density

    图  7  HB-PDMS涂层和SiO2@HB-PDMS涂层的温差试验 (a) 和耐紫外老化试验结果 (b)

    Figure  7.  Transmission spectra (a) and UV aging resistance test (b) of the HB-PDMS and SiO2@HB-PDM coatings

    图  8  涂覆SiO2@HB-PDMS涂层前后试样的电化学测试结果:(a) Tafel极化曲线;(b) Nyquist图

    Figure  8.  Electrochemical test results of samples before and after SiO2@HB-PDMS coating: (a) Tafel polarization curve; (b) Nyquist diagram

    RsSolution resistance between the reference electrode and specimens; RctCharge transfer resistance; RcoatResistance of the superhydrophobic coating; Cdl, CcoatDouble layer capacitance on metal surface and capacitance on coating itself, respectively; WWarburg resistance

    图  9  未处理玻璃 (a) 和SiO2@HB-PDMS超疏水涂层玻璃 (b) 的自清洁测试

    Figure  9.  Self-cleaning properties of uncoated glass (a) and SiO2@HB-PDMS superhydrophobic coated glass (b)

    表  1  不同SiO2粒径及固含量的SiO2@HB-PDMS复合涂层的划格试验测试结果

    Table  1.   Classification of cross-cut test results of SiO2@HB-PDMS composite coatings with different SiO2 particle size and solid content

    SiO2 particle size/nmCross-cut test results
    20wt%SiO230wt%SiO240wt%SiO250wt%SiO260wt%SiO2
    3001245
    5000345
    50003245
    下载: 导出CSV

    表  2  从极化曲线获得的HB-PDMS和SiO2@HB-PDMS涂层自修复测试前后的腐蚀参数

    Table  2.   Corrosion parameters obtained from potentiodynamic polarization curves with the self-healing tests on HB-PDMS and SiO2@HB-PDMS coatings

    SamplesEcorr/mVi/(μA·cm−2)
    HB-PDMS Original 188.2 0.330
    Scratched 171.6 0.486
    Healed 182.3 0.472
    SiO2@HB-PDMS Original 197.3 0.560
    Scratched −1091.3 0.886
    Healed −663.1 0.802
    Note: Ecorr—Corrosion potential.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-01-13
  • 修回日期:  2022-03-12
  • 录用日期:  2022-03-19
  • 网络出版日期:  2022-04-01
  • 刊出日期:  2023-02-15

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