28th Congress of SCTM

DEVELOPMENT OF WATERBORNE POLYMER NANOCOMPOSITES WITH MWCNT/Ag HYBRIDS FOR EMI SHIELDING APPLICATIONS

Not scheduled

10m

Metropol Lake Resort

E-poster Polymers and polymer materials

Speaker

Ms Andrea Petanova (Ss. Cyril and Methodius University in Skopje, Faculty of Technology and Metallurgy, Skopje, Macedonia)

Description

Waterborne polymer nanocomposites have attracted considerable attention as sustainable alternatives to solvent-based materials for electromagnetic interference (EMI) shielding applications 1,2. In this study, nanocomposite films based on a poly(methyl methacrylate-co-butyl acrylate) matrix synthesized via miniemulsion polymerization were reinforced with multi-walled carbon nanotubes (MWCNTs) and silver-decorated MWCNT (MWCNT/Ag) hybrid fillers prepared in different mass ratios. FTIR spectroscopy confirmed the successful incorporation of the conductive fillers into the polymer matrix. The mechanical properties were assessed by tensile testing, with the MWCNT/Ag-containing nanocomposites exhibiting increased toughness compared with the neat polymer. The incorporation of conductive fillers resulted in electrical conductivities on the order of 10⁻⁷ S/cm, while the surface properties remained relatively stable, with water contact angles ranging from 71° to 83°. EMI shielding measurements showed improved attenuation for the MWCNT/Ag-containing nanocomposites, with the highest shielding effectiveness observed for the 0.5 wt% 1:1 MWCNT:Ag formulation. Overall, the developed waterborne nanocomposite coatings show promising potential as lightweight and environmentally friendly materials for EMI shielding applications.

Keywords: waterborne nanocomposites, miniemulsion polymerization, MWCNT/Ag hybrids, electromagnetic interference shielding.

References:
1. Xing, D.; Lu, L.; Xie, Y.; Tang, Y.; Teh, K. S. Highly Flexible and Ultra-Thin Carbon-Fabric/Ag/Waterborne Polyurethane Film for Ultra-Efficient EMI Shielding. Mater. Des. 2020, 185, 108227. https://doi.org/10.1016/j.matdes.2019.108227.
2. Jia, Y.; Sun, R.; Pan, Y.; Wang, X.; Zhai, Z.; Min, Z.; et al. Flexible and Thin Multifunctional Waterborne Polyurethane/Ag Film for High-Efficiency Electromagnetic Interference Shielding, Electro-Thermal and Strain Sensing Performances. Compos. Part B Eng. 2021, 210, 108668. https://doi.org/10.1016/j.compositesb.2021.108668.