Preparation Of Microwave Absorbing Films With Carbon Nanotubes By Layer-by-Layer Assembly

The proliferation of electronics equipments has led to a new kind of pollution:the electromagnetic interference. Microwave-absorbing materials have been attracting more and more attention in electromagnetic protection field, due to their conversion properties from electromagnetic energy to heat. Thin, flexible, light weight microwave absorbing materials are desirable in various applications including customers products, protective clothing and the military field. Here, a controllable design of microwave-absorbing textiles is prepared using the Layer-by-Layer (LbL) assembled technique. In this research work, LBL assembly technique was used to prepare microwave-absorbing cotton fabric with multi-walled carbon nanotubes (MWNTs) coating. Interestingly, a thin CNTs film prepared with10bilayers on cotton exhibit54%of absorption at10.86GHz with a matching total shielding effectiveness of55.1%. The absorption is the dominant shielding mechanism of our samples. This method has large potential for building new microwave absorbing textiles with improved performance.