Carbonization temperature controlled thermal conductivity of graphitic carbon nanoparticles and their polymer composites
Weiwei Zhu,
Xianrui Meng,
Yanshan Zhan,
Hanmei Li,
Jie Ma,
Junxia Liu,
Cuiping Zhai,
Wenkai Zhang,
Xiaomin Fang,
Tao Ding
Affiliations
Weiwei Zhu
Institute of Functional Organic Molecular Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
Xianrui Meng
Institute of Functional Organic Molecular Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
Yanshan Zhan
Henan Engineering Laboratory of Flame-Retardant and Functional Materials, Henan University, Kaifeng 475004, P. R. China
Hanmei Li
Henan Engineering Laboratory of Flame-Retardant and Functional Materials, Henan University, Kaifeng 475004, P. R. China
Jie Ma
Institute of Functional Organic Molecular Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
Junxia Liu
Henan Engineering Laboratory of Flame-Retardant and Functional Materials, Henan University, Kaifeng 475004, P. R. China
Cuiping Zhai
Institute of Functional Organic Molecular Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
Wenkai Zhang
Institute of Functional Organic Molecular Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
Xiaomin Fang
Henan Engineering Laboratory of Flame-Retardant and Functional Materials, Henan University, Kaifeng 475004, P. R. China
Tao Ding
Henan Engineering Laboratory of Flame-Retardant and Functional Materials, Henan University, Kaifeng 475004, P. R. China
Carbon materials as versatile fillers have drawn increasing attention in thermal conductive polymer composites, however, the thermal conductivity (TC) regulation of them remains challenging. Herein, the tunable lattice thermal conductivity is reported for glucose derived graphitic carbon nanoparticles (GCPs) and their polymer composites. Both the in-plane (La) and out-of-plane (Lc) coherence lengths of GCPs increase with carbonization temperature in the range of 700 °C to 1300 °C. The intrinsic TC of GCPs film is directly extracted from the dependence of the Raman G peak frequency on the excitation laser power and the first order temperature coefficient. It is found that the in-plane lattice TC increases exponentially with both of the increasing La and decreasing defect concentration. The GCPs are then used as highly processible fillers to fabricate thermoset composites based on reactive benzoxazine (BA-a). The total TC of the poly(BA-a)/GCPs are found increase monotonically from 0.27 W·m-1·K-1 to 0.34 W·m-1·K-1 with the increasing graphitization levels of GCPs, and a clear signature of thermal percolation threshold at 6 vol% GCPs loadings is also observed.
