Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 28, Pages 15641-15648Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b04462
Keywords
cellulose; graphite; polypyrrole; thermal stability; conductive film
Funding
- Forestry Nonprofit Industry Research of China [201204803]
- National Science Foundation of China for the Key Projects [31430092, 31110103902]
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In this study, graphite powder (GP) was introduced into the conductive cellulose/polypyrrole (PPy) composite films to increase their conductivity and thermal stability. The GP was dispersed in ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) before the dissolution of cellulose, and the cellulose/GP/PPy films were prepared by in situ chemical polymerization of PPy nanoparticles on the film surface. The structural characteristics and properties of the composite films were investigated in detail. The GP flakes, which were embedded in the cellulose matrix, increased the thickness and decreased the density of the films, leading to the decrement of mechanical properties. However, the thermal stability of the films was significantly improved by the incorporation of graphite, and the composite film could even substantially maintain the original shape after being burned. In addition, the electrical conductivity of the films was increased seven times, leading to the excellent electromagnetic interference shielding effectiveness. The cellulose/GP/PPy film could be considered as a potential candidate for the effective lightweight electromagnetic interference shielding materials in electronics, radar evasion, aerospace, and other applications.
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