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

Materials Today Communications Elsevier

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.

Authors with CRIS profile

Guanda Yang Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP) Dirk Schubert Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP)

Involved external institutions

Guangdong Ocean University CN China (CN) Guangdong Polytechnic Normal University CN China (CN)

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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