Multifunctional melamine-based multilayer foam with heterogeneous alternating structure towards electromagnetic interference shielding

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 674; p. 131953
• Main Authors: Feng, Yujia, Liao, Huimin, Wang, Jian
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.10.2023
• Subjects: Electromagnetic interference shielding; Flame retardancy; Heterogeneous alternating multilayer structure; Multifunctional melamine foam; Thermal insulation; Electromagnetic interference shielding; Multifunctional melamine foam; Flame retardancy; Heterogeneous alternating multilayer structure; Thermal insulation
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2023.131953

With the rapid development of 5G technology, there is an urgent need to endow electromagnetic interference (EMI) shielding materials multifunctionality to cope with various harsh environments. Herin, a multifunctional melamine-based EMI shielding composite with heterogeneous alternating multilayer structure were fabricated through the layer-by-layer stacking method, consisting of Ni coated melamine foam (MF@Ni) layers, Fe3O4@polydimethylsiloxane dipped MF layers (Fe3O4@PDMS/MF) and metallized polyimide fabric layer (PI@Ni). The synergistic electromagnetic loss and interfacial polarization loss formed by the selectively distributed conductive Ni coating and magnetic Fe3O4 nanoparticles result in a high EMI shielding effectiveness (SE) of 54.20 dB with an absorption (A) value of 0.51 for the multilayer MF-based composite. Moreover, since the micro/nano porous structure, the nonflammability of MF, the functional Ni coating and Fe3O4@PDMS filling, the multilayer foam owns thermal insulation and flame retardancy. This work provides a viable strategy for designing absorption-based EMI shielding materials with thermal insulation and flame retardancy, which accords with the next generation of multifunctional EMI shielding materials. [Display omitted] •Melamine-based composite combining multilayer structure with foam structure prepared by a simple and efficient method.•The EMI shielding effectiveness of the melamine-based composite could achieve 54.20 dB, and A value of 0.51.•The melamine-based composite owns good thermal insulation and flame retardancy.