Multifunctional Integrated Composite Coatings Based on both Grafted-ZnO and Single-walled Carbon Nanotubes

doi:10.6023/A24080230

Acta Chimica Sinica ›› 2024, Vol. 82 ›› Issue (11): 1142-1149.DOI: 10.6023/A24080230 Previous Articles Next Articles

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接枝ZnO与单壁碳纳米管协同构筑功能一体化复合涂层

满田囡, 王芷琦, 邢月, 马克明, 农智升^*(), 卢少微^*()

沈阳航空航天大学材料科学与工程学院沈阳 110136

投稿日期:2024-08-02 发布日期:2024-11-13
基金资助:
辽宁省教育厅项目(LJKMZ20220570); 辽宁省高校基本科研业务费资助

Multifunctional Integrated Composite Coatings Based on both Grafted-ZnO and Single-walled Carbon Nanotubes

Tiannan Man, Zhiqi Wang, Yue Xing, Keming Ma, Zhisheng Nong(), Shaowei Lu()

School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China

Received:2024-08-02 Published:2024-11-13
Contact: ^*E-mail: nzsfir@163.com
Supported by:
Liaoning Provincial Department of Education(LJKMZ20220570); fundamental research funds for the universities of Liaoning Province

Superhydrophobic coatings are widely used in many fields because of their self-cleaning, anti-icing, anti- corrosion and oil-water separation properties. Conventionally, superhydrophobicity is deﬁned as possessing a water contact angle above 150° and a sliding angle below 10°. A superhydrophobic surface is produced either by creating a rough surface on a hydrophobic material or by modifying a rough surface using materials having a low surface free energy. To consider the practical application of superhydrophobic coating, we prepared a micro-nanoscale flowerlike superhydrophobic coating using a surface treatment method. In our work, the monodisperse single-walled carbon nanotubes (SWCNTs) can be obtained using a non-covalent polyvinylpyrrolidone (PVP) dispersant under the graded homogenization method. We incorporate low amounts of 0.15% (w) SWCNTs into fluorocarbon (FC) coatings to fabricate composite coatings. The micro-nano structure surface with micron level smooth and nanometer level rough was constructed by ZnO particles after surface treatment. The contact angle of composite coating was 152.5° and a sliding angle was 5°, and the bionic superhydrophobic coating with integrated functions was fabricated. The result suggests that the combination of the rough structures achieved by the flower-like ZnO and low surface energy provided by stearic acid modiﬁcation results in superhydrophobicity and a very low sliding angle. The network structure formed by SWCNTs and the conductive grid chain formed by ZnO has decided the antistatic properties, the resistivity is 3.15 Ω•m. The superhydrophobic surface and the three-dimensional cross-structure of the ZnO/SWCNTs/FC composite coating can delay the corrosion. The corrosion current density of the composite coating is 9.66×10⁻⁸ A/cm², which is 3 orders of magnitude lower than that of Q235 steel. The ZnO/SWCNTs/FC composite coating could be easily repaired after losing superhydrophobicity by surface treatment. At the same time, the coating has good mechanical stability, acid and alkali resistance, and the integrated characteristics of electrical resistance, corrosion resistance and self-cleaning functions. These coatings can ﬁnd potential applications in the industry.

Key words: micro-nano structure, superhydrophobic coatings, antistatic property, corrosion resistance, self-cleaning property

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Tiannan Man, Zhiqi Wang, Yue Xing, Keming Ma, Zhisheng Nong, Shaowei Lu. Multifunctional Integrated Composite Coatings Based on both Grafted-ZnO and Single-walled Carbon Nanotubes[J]. Acta Chimica Sinica, 2024, 82(11): 1142-1149.

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Fig. & Tab. 9

Figure 1. FTIR spectra of composite coatings

Figure 2. XPS of ZnO/SWCNTs/FC composite coatings

Figure 3. SEM images of composite coatings (a) SWCNTs/FC coating, (b) non-modified ZnO/SWCNTs/FC coating, (c) 5% (w) ZnO/SWCNTs/FC coating, (d) 10% (w) ZnO/SWCNTs/FC coating, (e) 12.5% (w) ZnO/SWCNTs/FC coating, (f) 15% (w) ZnO/SWCNTs/FC coating

w(ZnO)/%	电导率/(S•cm⁻¹)	电阻率/(Ω•m)
0	0.27	0.05
5	2.57×10⁻³	3.89
10	1.61×10⁻³	6.23
12.5	3.29×10⁻³	3.15
15	7.14×10⁻³	1.43

Table 1. Resistivity of the composite coatings

Figure 4. Contact angle of composite coatings

Figure 5. (a) Polarization curves, (b) plane impedance, (c) modulus impedance and (d) phase angle of composite coating

Figure 6. (a) Shear abrasive wear method; (b) contact angles after shear abrasive; (c) the repaired surface; (d) acidity and alkalinity measurement

Figure 7. Self-cleaning measurement of the composite coatings

Figure 8. Corrosion resistance and anti-static mechanism of composite coating

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接枝ZnO与单壁碳纳米管协同构筑功能一体化复合涂层

Multifunctional Integrated Composite Coatings Based on both Grafted-ZnO and Single-walled Carbon Nanotubes

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References 17

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