Multi-functional PDMS/MMT Coating on magnesium substrates: Hydrophobicity, durability, and EMI shielding

Duan C, Han L, Yang G, Schubert DW, Zhang T (2024)


Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 39

Pages Range: 108603

Article Number: 108603

DOI: 10.1016/j.mtcomm.2024.108603

Abstract

In this work, a highly efficient surface coating strategy using polydimethylsiloxane (PDMS) modified low-cost montmorillonite (MMT) was revealed, to enhance the surface performance and durability of magnesium substrates. Contact angle, self-cleaning, wear resistance, corrosion resistance and ultrabroadband electromagnetic absorption and EMI shielding evaluations were comprehensively studied. The obtained PDMS/MMT/Mg substrate consistently exhibited an obvious increased contact angle from 76.1 to 141.9 °, signifying strong hydrophobicity and self-cleaning properties compared to the untreated R-Mg substrate. No significant surface wettability changes were detected even after 50 times of tape peeling or 3.0 wt% NaCl solution immersion for 60 h, indicating high durability of the protective PDMS/MMT coatings. Moreover, the PDMS/MMT/Mg substrates can be applied as microwave-absorbing materials, particularly in high-frequency applications, and as excellent EMI shielding with an SE value above 40 dB. This study highlights the effectiveness of the relatively inexpensive PDMS/MMT coating in enhancing the performance of magnesium substrates, providing a new approach to balance cost control and meet performance requirements in industrial or large-scale production.

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How to cite

APA:

Duan, C., Han, L., Yang, G., Schubert, D.W., & Zhang, T. (2024). Multi-functional PDMS/MMT Coating on magnesium substrates: Hydrophobicity, durability, and EMI shielding. Materials Today Communications, 39, 108603. https://doi.org/10.1016/j.mtcomm.2024.108603

MLA:

Duan, Chunmei, et al. "Multi-functional PDMS/MMT Coating on magnesium substrates: Hydrophobicity, durability, and EMI shielding." Materials Today Communications 39 (2024): 108603.

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