A Carbon Composite Film with Three-Dimensional Reticular Structure for Electromagnetic Interference Shielding and Electro-Photo-Thermal Conversion

Materials

Xiaokang Mei¹  Longsheng Lu¹  Shitong Chai¹  Na Lin²  Hanning Chen² 

[1] School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, China;School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;

关键词: electromagnetic interference shielding;    carbon fabric;    graphene;    electro-thermal conversion;    photo-thermal effect;   

DOI  :  10.3390/ma14092423

来源: DOAJ

【 摘 要 】

The design of flexible wearable electronic devices that can shield electromagnetic waves and work in all weather conditions remains a challenge. We present in this work a low-cost technology to prepare an ultra-thin carbon fabric–graphene (CFG) composite film with outstanding electromagnetic interference shielding effectiveness (EMI SE) and electro-photo-thermal effect. The compatibility between flexible carbon fabric skeleton and brittle pure graphene matrix empowers this CFG film with adequate flexibility. The reticular fibers and porous structures play a vital role in multiple scattering and absorption of electromagnetic waves. In the frequency range of 30–1500 MHz, the CFG film can achieve a significantly high EMI SE of about 46 dB at tiny thickness (0.182 mm) and density (1.4 g cm⁻³) predominantly by absorption. At low safe voltages or only in sunlight, the film can self-heat to its saturation value rapidly in 40 s. Once the electricity or light supply is stopped, it can quickly dissipate heat in tens of seconds. A combination of the EMI SE and the prominent electro-photo-thermal effect further enables such a remarkable EMI shielding film to have more potential applications for communication devices in extreme zones.

【 授权许可】

Unknown