In situ sintered silver decorated <scp>3D</scp> structure of cellulose scaffold for highly thermoconductive electromagnetic interference shielding epoxy nanocomposites
Thi Tuong Vi Tran, Dai‐Viet N. Vo, Son Thanh Nguyen, Son D. N. Luu, M. Mofijur, Minh Canh Vu
Abstract
Abstract This study presents a 3‐dimensional (3D) network structure of cellulose scaffold (CS), which was in situ decorated with silver nanoparticles (AgNPs). The scaffold was then infiltrated with epoxy matrix and cured at elevated temperature to sinter the AgNPs; finally, highly thermoconductive epoxy composites (Ag@CS/epoxy) was obtained. The resultant Ag@CS20/epoxy composite reached a thermal conductivity of 2.52 W·m −1 ·K −1 at 2.2 vol% of filler loading, which shows an enhancement of over 11‐folds in the thermal conductivity compared to the neat epoxy. The superb electrical conductivity value of over 53,691 S·m −1 of the Ag@CS20/epoxy was achieved, which led to exceptional EMI SE values of 69.1 dB. Furthermore, surface temperatures during heating and cooling were also investigated to demonstrate the superior heat dissipating capacity of the Ag@CS/epoxy composite, which can be potentially put an application as thermal dissipating material in the next generation of electronics.