3 years ago

Collagen Fiber Membrane as an Absorptive Substrate To Coat with Carbon Nanotubes-Encapsulated Metal Nanoparticles for Lightweight, Wearable, and Absorption-Dominated Shielding Membrane

Collagen Fiber Membrane as an Absorptive Substrate To Coat with Carbon Nanotubes-Encapsulated Metal Nanoparticles for Lightweight, Wearable, and Absorption-Dominated Shielding Membrane
Xin Huang, Bi Shi, Xuepin Liao, Xiaoling Wang, Xiaoxia Ye, Chang Liu
A lightweight, wearable, and high-performance electromagnetic interference (EMI) shielding membrane was prepared by using collagen fiber membrane (CFM) as microwave absorptive substrate and multiple wall carbon nanotubes-encapsulated metal nanoparticles (MNPs@MWCNTs) as efficient microwave absorbers coated on CFM. CFM is able to consume microwaves via dielectric loss, in addition to its the role as a supporting matrix. Encapsulating of metal nanoparticles (MNPs) enhances the dissipation capability of MWCNTs and also improves the stability of encapsulated MNPs. A cooperative shielding mechanism between CFM and MNPs@MWCNTs is responsible for the absorption-dominated shielding performance. The as-prepared MNPs@MWCNTs/CFM composite membrane exhibited a high shielding effectiveness (SE) of 30–60 dB with 4.0 wt % of MNPs@MWCNTs in a wide frequency range of 0.5–12.0 GHz, and the specific SE was high, up to 162 dB cm–3 g–1. The MNPs@MWCNTs/CFM membrane also is lightweight and features good flexibility and wearability. This work provides a novel strategy for designing lightweight and high-performance shielding membranes.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b01930

DOI: 10.1021/acs.iecr.7b01930

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