Flame-retardant electromagnetic shielding composite material with sandwich structure and preparation method of flame-retardant electromagnetic shielding composite material

• Main Authors: CHU CEN, XU PEI, GAO YIFEI, MA XIANGYU, LIU YIMING, DING YUNSHENG
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRINTED CIRCUITS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention provides a sandwich structure flame-retardant electromagnetic shielding composite material and a preparation method thereof, the sandwich structure is formed by hot pressing of an electromagnetic shielding carbon fiber cloth middle layer and flame-retardant layers on two sides, and the flame-retardant layers comprise polylactic acid, poly (butylene adipate-co-terephthalate), APP-SiO2 and a compatilizer IPU-PLA-PBA-MXene. In the composite material disclosed by the invention, a phosphorus-containing component is generated after the APP-coated SiO2 is combusted, so that the generation of a compact carbon layer of the composite material can be promoted; tiO2 generated by combustion of MXene can hinder diffusion of heat and smoke and accelerate carbonization; the IPU-PLA-PBA-MXene ensures the good mechanical property of the composite material; the carbon fiber cloth is used as a middle layer, so that the high electromagnetic shielding effectiveness of the composite material is ensured, the charring c