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Comparison of graphene oxide and graphitic carbon nitride filled carbon–phenolic composites: Thermomechanical properties and role of the strong electronegativity of nanofillers
Author(s) -
Ma Yuanyuan,
Yang Yu,
Lu Chunxiang,
Lu Kuan,
Wu Shijie,
Liu Xingchen,
Wen Xiaodong
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46242
Subject(s) - graphene , materials science , composite material , oxide , thermal conductivity , thermal expansion , composite number , electronegativity , carbon fibers , graphitic carbon nitride , interfacial thermal resistance , thermal , thermal resistance , nanotechnology , chemistry , thermodynamics , organic chemistry , physics , metallurgy , photocatalysis , catalysis
Carbon–phenolic (CF–PR) composites with 0.1 wt % graphene oxide (GO) and acidified graphitic carbon nitride (ag‐C 3 N 4 ) were synthesized and characterized to understand their thermal properties. The thermal conductivity, coefficient thermal expansion, dynamic mechanical analysis, and scanning electron microscopy were used in our experimental efforts. The results demonstrate that the ag‐C 3 N 4 ‐filled composite had 17.17% and 54% reductions in the thermal conductivity and coefficient thermal expansion, respectively, when compared with the neat composite, although the GO‐filled showed a 8.54% decrease and a 30% increase, respectively. Furthermore, reactive molecular dynamics simulation was used to investigate the mechanisms at the atomistic level when the composites are subjected to thermal behavior. The simulated results show that the influence of GO and ag‐C 3 N 4 on the thermal conductivities of the composites was different. Lowly loaded GO favored the more interfacial thermal resistance. However, the stronger electronegativity in ag‐C 3 N 4 favored the formation of a vacuum zone in the matrix; this contributed to increasing the interfacial boundaries and defect scattering. The simulation results are expected to be of great help to serve as a guide for further experiments concerning the thermal properties. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46242.