Sustainable Lightweight Biochar-Based Composites with Electromagnetic Shielding Properties.

ABSTRACT: Global warming has prompted a search for new materials that capture and sink carbon dioxide (CO₂). Biochar is a derivative of biomass pyrolysis and a carbon sink mainly used to improve crop production. This work explores the underlying mechanism behind biochar's electric conductivity using a wide range of feedstocks and its combination with a binder (gypsum). This gypsum-biochar composite exhibits decreased density and flexural moduli with increasing biochar content, particularly after 20% w/w. Gypsum-biochar drywall-like composite prototypes display increasing shielding efficiency mostly in the microwave range as a function of biochar content, differing from other conventional metal (copper) and synthetic carbon-based materials. This narrow range of electromagnetic interference

SUBMITTER: Natalio F 

PROVIDER: S-EPMC7758945 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature