title: Light-Weight Silver Plating Foam and Carbon Nanotube Hybridized Epoxy Composite Foams with Exceptional Conductivity and Electromagnetic Shielding Property.
abstract: Herein, light-weight and exceptionally conductive epoxy composite foams were innovatively fabricated for electromagnetic interference (EMI) shielding applications using multiwalled carbon nanotubes (MWCNTs) and 3D silver-coated melamine foam (SF) as conductive frameworks. A novel and nontraditional polymer microsphere was used to reduce the material density. The preformed, highly porous, and electrically conductive SF provided channels for fast electron transport. The MWCNTs were used to offset the decrease in conductive pathways due to the crystal defects of the silver layer and the insulating epoxy resin. Consequently, an exceptional conductivity of 253.4 S m(-1), a remarkable EMI shielding effectiveness of above 68 dB at 0.05-18 GHz, and a thermal conductivity of 0.305 W mK(-1) were achieved in these novel foams employing only 2 wt % of MWCNTs and 3.7 wt % of silver due to the synergistic effects that originated in the MWCNT and SF. These parameters are substantially higher than that achieved for the foam containing 2 wt % MWCNTs. Also, the SF exhibited little weakening in the foamability of the epoxy blends and the compression properties of resulting foams. All the results indicated that this effort provided a novel, simple, low-cost, and easily industrialized concept for fabricating light-weight, high-strength epoxy composite foams for high-performance EMI shielding applications.
authors.affiliation: State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University , Chengdu 610065, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University , Chengdu 610065, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.affiliation: College of Electronics and Information Engineering, Sichuan University , Chengdu 610065, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Hua
authors.affiliation: State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University , Chengdu 610065, China.
authors.forename: Aiming
authors.initials: A
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University , Chengdu 610065, China.
authors.forename: Jianjun
authors.initials: J
authors.lastname: Bao
keywords: carbon nanotube; conductivity; electromagnetic shielding; epoxy foam; silver plating foam