水性电磁屏蔽涂料的开发与应用

Development and Application of Waterborne Electromagnetic Shielding Coatings

本文采用炭黑、石墨粉和石墨烯为导电材料调配出一种水性电磁屏蔽涂料,可做内墙底漆使用,对水泥、砂浆、腻子、石膏、砖石均有较强的附着力,电磁屏蔽涂料的最佳配方为:导电浆料∶粘合剂基料=70%∶30%,石墨烯∶炭黑∶石墨粉=40%∶30%∶30%。经权威部门测试,在0.3 MHz～40 GHz频段的屏蔽效能40.1～62.3 dB;将水性电磁屏蔽涂料应用于屏蔽室施工中,实测涂料墙200 MHz～3.0 GHz频段的屏蔽效能42～48 dB,具备较好的屏蔽效果。

In this paper,carbon black,graphite powder and graphene were used as conductive materials to prepare a waterborne electromagnetic shielding coatings,which could be used as primer for interior wall.It had excellent adhesion to cement,mortar,putty,gypsum and masonry.The optimum formula of electromagnetic shielding coatings is:conductive paste and binder base 70%∶30%,Graphene,Carbon black and graphite powder 40%∶30%∶30%. It was tested that the shielding effectiveness of waterborne electromagnetic shielding coatings was 40.1~62.3 dB in the frequency range of 0.3 MHz^40 GHz.The waterborne electromagnetic shielding coatings were applied to shielding room construction,the shielding effectiveness of the coatings wall in 200 MHz^3.0 GHz frequency band was 42~48 dB.