In situ polymerization of graphene-polyaniline@polyimide composite films with high EMI shielding and electrical properties.

ABSTRACT: With the increasing demands of the electronics industry, electromagnetic interference (EMI) shielding has become a critical issue that severely restricts the application of devices. In this work, we have proposed a "non-covalent welding" method to fabricate graphene-polyaniline (Gr-PANI) composite fillers. The Gr sheets are welded with PANI via π-π non-covalent interactions. Furthermore, a flexible polyimide (PI) composite film with superior EMI shielding effectiveness is prepared by in situ polymerization. The 40% content of Gr-PANI_10:1 (the mass ratio of Gr to PANI is 10 : 1) shows a superior electrical conductivity (σ) as high as 2.1 ± 0.1 S cm^-1, 1.45 times higher than that of Gr@PI film at the same loading. Moreover, the total shielding effec

SUBMITTER: Cheng K 

PROVIDER: S-EPMC9048709 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature