Hybrid Foams based on Multi‐Walled Carbon Nanotubes and Cellulose Nanocrystals for Anisotropic Electromagnetic Shielding and Heat Transport
Carina Schiele,
Andi Di,
Seyed Ehsan Hadi
et al.
Abstract:Lightweight and mechanically robust hybrid foams based on cellulose nanocrystals (CNC) and multi‐walled carbon nanotubes (MWCNT) with an anisotropic structure are prepared by directional ice‐templating. The anisotropic hybrid CNC‐MWCNT foams displayed a combination of highly anisotropic thermal conductivity and an orientation‐dependent electromagnetic interference (EMI) shielding with a maximum EMI shielding efficiency (EMI‐SE) of 41–48 dB between 8 and 12 GHz for the hybrid foam with 22 wt% MWCNT. The EMI‐SE … Show more
Textile cellulose nanocrystals and wood cellulose nanofibrils are used to prepare foams by freeze drying or supercritical drying. The drying route impacts the foam structure and properties paving the way to tailor foams depending on the application.
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