title: Synthesis and electromagnetic interference shielding of cellulose-derived carbon aerogels functionalized with α-Fe2O3and polypyrrole.
abstract: Eco-friendly cellulose-derived carbon aerogels (CDCA) were employed as porous substrate to integrate with α-Fe2O3and polypyrrole (PPy) via pyrolysis and vapor-phase polymerization. The SEM and TEM observations present that the wrinkled PPy sheets and the α-Fe2O3nanoparticles were well dispersed in CDCA. The strong interactions (such as hydrogen bonding) between the substrate and the nanomaterials were demonstrated by the FTIR and XPS analysis. When utilized as electromagnetic interference (EMI) shielding materials, the α-Fe2O3/PPy/CDCA (FPCA) composite has the highest total shielding effectiveness (SEtotal) of 39.4dB, about 2.0, 2.9, and 1.3 times that of the acid-treated CDCA (19.3dB), PPy (13.6dB), and α-Fe2O3/CDCA (29.3dB), respectively. Moreover, the shielding effectiveness due to absorption accounts for 78.2%-84.2% of SEtotalfor FPCA, indicative of the absorption-dominant shielding mechanism contributing to alleviating secondary radiation. These features make the composite a useful alternative candidate for EMI shielding.
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: wancaichaojy@163.com.
authors.forename: Caichao
authors.initials: C
authors.lastname: Wan
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: lijiangroup@163.com.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D055590:Electromagnetic Phenomena; D005290:Ferric Compounds / Q000737:chemistry*; D005782:Gels / Q000138:chemical synthesis / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D005782:Gels; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D002244:Carbon; D002482:Cellulose
keywords: Carbon aerogels; Cellulose; Composites; Electromagnetic interference shielding; Polypyrrole; α-Fe(2)O(3)