AUTHOR=Xue Wei , Feng Yi , Wang Jian , Fang Zumin , Shen Jiawen , Ma Yunfan , Wang Yueru , Liu Hechen , Li Le 

TITLE=Preparation of polymer hollow microsphere filled epoxy resin-based syntactic foam material and its performance analysis

JOURNAL=Frontiers in Materials

VOLUME=Volume 11 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2024.1500015

DOI=10.3389/fmats.2024.1500015

ISSN=2296-8016

ABSTRACT=To explore sound-absorbing and flame-retardant materials that meet the requirements for double-shielded and double-insulated Faraday cages, polymethyl methacrylate (PMMA) microspheres were incorporated into epoxy resin-based syntactic foam materials for testing and analysis. The addition of PMMA microspheres was found to enhance the electrical, mechanical, sound-absorbing, and flame-retardant properties of the syntactic foam, providing a potential reference for applications in high-voltage hall shielding and sound absorption. Syntactic foams with four concentrations of PMMA microspheres (0%, 0.5%, 1%, and 2%) were prepared. High-voltage breakdown testing, impedance tube testing for sound absorption coefficient, cone calorimetry for flame-retardant performance, and tensile and bending tests were conducted. Results showed that as the concentration of PMMA microspheres increased, improvements were observed in the tensile, bending, flame-retardant, and sound absorption properties of the syntactic foams, while breakdown strength decreased. These findings provide valuable insights into the application of syntactic foam materials in double-insulation, double-shielded Faraday cages.