▎ 摘　　要

NOVELTY - The preparation of electromagnetic shielding foam involves (1) taking 0.1-5 pts. wt. graphene, 1000 pts. wt. water, 50-600 pts. wt. ferric chloride or ferric nitrate, 30-300 pts. wt. ferrous chloride or ferrous nitrate and 9.1-91 pts. wt. aqueous ammonia, adding graphene to deionized water, ultrasonically dispersing at 30-80 degrees C for 0.5-5 hours, adding ferric chloride or ferric nitrate, ferrous chloride or ferrous nitrate to graphene suspension, stirring in water bath, adding aqueous ammonia and stirring, (2) separating graphene/ferrite component in suspension with magnet, and preparing graphene/ferrite slurry with water content of 15-30%, (3) applying graphene/ferrite slurry to fabric carrier and drying to obtain graphene/ferrite electromagnetic shielding coated cloth, (4) processing into two foam sheets, using graphene/ferrite electromagnetic shielding coated cloth as interlayer, and bonding foam and coated cloth into composite interlayer material. USE - Preparation of electromagnetic shielding foam. ADVANTAGE - The method enables preparation of electromagnetic shielding foam by simple and economical process. DETAILED DESCRIPTION - The preparation of electromagnetic shielding foam involves (1) taking 0.1-5 pts. wt. graphene, 1000 pts. wt. water, 50-600 pts. wt. ferric chloride or ferric nitrate, 30-300 pts. wt. ferrous chloride or ferrous nitrate and 9.1-91 pts. wt. aqueous ammonia, adding graphene to deionized water, ultrasonically dispersing at 30-80 degrees C for 0.5-5 hours, adding ferric chloride or ferric nitrate, ferrous chloride or ferrous nitrate to graphene suspension, stirring in water bath at 30-80 degrees C for 10-60 minutes, adding aqueous ammonia and stirring for 10-60 minutes, (2) separating graphene/ferrite component in suspension with magnet, and preparing graphene/ferrite slurry with water content of 15-30%, (3) applying graphene/ferrite slurry to fabric carrier and drying to obtain graphene/ferrite electromagnetic shielding coated cloth, (4) processing into two foam sheets, using graphene/ferrite electromagnetic shielding coated cloth as interlayer, and bonding foam and coated cloth into composite interlayer material.