Evaluation of Low Density and Highly Thermal Conductive Carbon Bonded Carbon Fiber Network with Mesophase Pitch as Binder

doi:10.15541/jim20190062

Abstract

Abstract:

The carbon bonded carbon fiber network was prepared by using carbon fibers carbonized at 500 ℃ with mesophase pitch as binder. The sample was compared with the one prepared by using carbon fibers carbonized at 1300 ℃and the one prepared by using phenolic resin as the binder. The carbon yields of binders, microstructure, graphitization degree and crystallite size of samples were characterized and thermal conductivity was obtained for the samples soaked into phase change materials (PCM) to form PCM composites. Results showed that a good “in-plane” bonding effect was formed between the highly aligned graphene layers of binders and graphite fibers. The density of the carbon fiber network after graphitization is 0.317 g?cm ^-3, and the in-plane thermal conductivity of its PCM composite is 19.30 W?m ^-1?K ^-1, increased by 80-folds as hhat of pure PCMs.

Key words: mesophase pitch, carbon fiber, high thermal conductivity, phase change materials composite

CLC Number:

TQ174

OUYANG Ting, CHEN Yun-Bo, JIANG Zhao, FEI You-Qing. Evaluation of Low Density and Highly Thermal Conductive Carbon Bonded Carbon Fiber Network with Mesophase Pitch as Binder[J]. Journal of Inorganic Materials, 2019, 34(10): 1030-1034.

Figures/Tables 5

Fig. 1 Thermogravimetic curves (a) and differential thermogravimetric curves (b) of mesophase pitch, phenolic resin and preoxidized fiber under nitrogen atmosphere

Fig. 2 Microstructures of different carbon fiber networks after carbonization or graphitization (a1) SCF500-MP1300; (b1) SCF1300-MP1300; (c1) SCF1300-PR1300; (a2) SCF500-MP2850; (b2) SCF1300-MP2850; (c2) CF1300-PR2850

Fig. 3 Raman spectra (a) and XRD patterns (b) of carbon fiber networks

Table 1 Microcrystalline parameters of graphitized carbon fiber networks

Sample	ρ/(g·cm^-3)	d₍₀₀₂₎/nm	g/%	FWHM (002)	FWHM (100)	L_c/nm	L_a/nm	R(I_D/I_G)
SCF500-MP2850	0.317	0.3371	79.8	0.303	0.432	28.2	40.4	0.253
SCF1300-MP2850	0.324	0.3369	82.8	0.304	0.231	28.1	75.5	0.245
SCF1300-PR2850	0.305	0.3364	88.7	0.393	0.480	21.7	36.4	0.245

Table 2 Thermal conductivity of phase change composites enhanced by carbon fiber network

Sample	ρ/ (g·cm^-3)	k/(W·m^-1·K^-1)		Anisotropic index (AI)
Sample	ρ/ (g·cm^-3)	x, y (in plane)	z (out of plane)	Anisotropic index (AI)
SCF500- MP1300PCM	1.03	1.21	0.53	2.26
SCF1300- MP1300PCM	1.07	1.17	0.59	2.03
SCF1300- PR1300PCM	1.03	1.16	0.63	1.86
SCF500- MP2850PCM	1.05	19.30	3.45	5.59
SCF1300- MP2850PCM	1.09	17.03	2.42	7.03
SCF1300- PR2850PCM	1.09	14.47	4.53	3.20

References 21

[1]	ALSHAER W G, NADA S A, RADY M A ,et al. Thermal management of electronic devices using carbon foam and PCM/nano-composite. International Journal of Thermal Sciences, 2015,89:79-86.
[2]	QURESHI Z A, ALI H M, KHUSHNOOD S . Recent advances on thermal conductivity enhancement of phase change materials for energy storage system: a review. International Journal of Heat and Mass Transfer, 2018,127:838-856.
[3]	HUSSAIN A R J, ALAHYARI A A, EASTMAN S A ,et al. Review of polymers for heat exchanger applications: factors concerning thermal conductivity.Applied Thermal Engineering, 2017,113:1118-1127.
[4]	MISHRA A K, LAHIRI B B, PHILIP J . Thermal conductivity enhancement in organic phase change material (phenol-water system) upon addition of Al₂O₃, SiO₂ and TiO₂ nano-inclusions. Journal of Molecular Liquids, 2018,269:47-63.
[5]	BIAN W, YAO T, CHEN M ,et al. The synergistic effects of the micro-BN and nano-Al₂O₃ in micro-nano composites on enhancing the thermal conductivity for insulating epoxy resin. Composites Science and Technology, 2018,168:420-428.
[6]	HU J, HUANG Y, ZENG X ,et al. Polymer composite with enhanced thermal conductivity and mechanical strength through orientation manipulating of BN. Composites Science and Technology, 2018,160:127-137.
[7]	CHEN Y, ZHANG Q, WEN X ,et al. A novel CNT encapsulated phase change material with enhanced thermal conductivity and photo-thermal conversion performance. Solar Energy Materials and Solar Cells, 2018,184:82-90.
[8]	NOMURA T, TABUCHI K, ZHU C ,et al. High thermal conductivity phase change composite with percolating carbon fiber network. Applied Energy, 2015,154:678-685.
[9]	CAO J, WANG L, SHANG Y ,et al. Dispersibility of nano-TiO₂ on performance of composite polymer electrolytes for Li-ion batteries. Electrochimica Acta, 2013,111:674-679.
[10]	FAN B, LIU Y, HE D ,et al. Enhanced thermal conductivity for mesophase pitch-based carbon fiber/modified boron nitride/epoxy composites. Polymer, 2017,122:71-76.
[11]	LI Y Y, QIAO Y Y, FAN X H ,et al. Study on microwave-induced oxidation of carbon fibers surface. China Plastics Industry, 2016,44(08):71-75.
[12]	JIANG Z, OUYANG T, YANG Y ,et al. Thermal conductivity enhancement of phase change materials with form-stable carbon bonded carbon fiber network. Materials & Design, 2018,143:177-184.
[13]	KANNO K, KOIKE N, KORAI Y ,et al. Mesophase pitch and phenolic resin blends as binders for magnesia-graphite bricks. Carbon, 1999,37(2):195-201.
[14]	ZHAO Y, LIU Z, WANG H ,et al. Microstructure and thermal/ mechanical properties of short carbon fiber-reinforced natural graphite flake composites with mesophase pitch as the binder. Carbon, 2013,53:313-320.
[15]	ZHONG B, ZHAO G L, HUANG X X ,et al. Binding natural graphite with mesophase pitch: a promising route to future carbon blocks. Materials Science and Engineering: A, 2014,610:250-257.
[16]	JIANG Z, OUYANG T, YAO X ,et al. Die swell behavior of liquid crystalline mesophase pitch. Journal of Materials Science, 2016,51(15):7361-7369.
[17]	YU F, CHEN L, FEI Y Q . Investigating carbonization of mesophase pitch fibers by thermo-gravimetric analysis. Mining and Metallurgical Engineering, 2016,36(4):100-103.
[18]	MIURA K, NAKAGAWA H, HASHIMOTO K . Examination of the oxidative stabilization reaction of the pitch-based carbon fiber through continuous measurement of oxygen chemisorption and gas formation rate. Carbon, 1995,33(3):275-282.
[19]	OGALE A A, LIN C, ANDERSON D P ,et al. Orientation and dimensional changes in mesophase pitch-based carbon fibers. Carbon, 2002,40(8):1309-1319.
[20]	YOON S H, TAKANO N, KORAI Y ,et al. Crack formation in mesophase pitch-basedcarbon fibres: Part I Some influential factors for crack formation. Journal of Materials Science, 1997,32(10):2753-2758.
[21]	SONG N, JIAO D, DING P ,et al. Anisotropic thermally conductive flexible films based on nanofibrillated cellulose and aligned graphene nanosheets. Journal of Materials Chemistry C, 2016,4(2):305-314.