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Chinese Journal of Materials Research  2016, Vol. 30 Issue (3): 229-234    DOI: 10.11901/1005.3093.2015.020
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Synthesis and Characterization of Carbon Fibers Multi-scale Reinforcement with Grafted Graphene Oxide
ZHAO Yonghua1, MA Zhaokun1,*(), SONG Huaihe1, CHEN Ming1, ZHOU Zhenggang2
Cite this article: 

ZHAO Yonghua, MA Zhaokun, SONG Huaihe, CHEN Ming, ZHOU Zhenggang. Synthesis and Characterization of Carbon Fibers Multi-scale Reinforcement with Grafted Graphene Oxide. Chinese Journal of Materials Research, 2016, 30(3): 229-234.

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Abstract  

A kind of carbon fiber / graphene oxide multi-scale reinforcement was prepared by "grafting to" method, with raw materials of the graphene oxide fabricated by a modified Hummers method and the carbon fiber treated with silane coupling agent Kh550.The prepared product was characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), Ramanspectroscopy (Raman), X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (IR). The mechanical properties and the conductivity of the reinforced carbon fiber were measured by electronic tensile strength tester for fiber and resistivity instrument. The results showthatafter grafting, the graphene oxide can be grafted onto grooves and defects of the carbon fiber surface; the number of unsaturated carbon atom increases andthe size of microcrystalline decreases on the surface of the carbon fiber; andthe tensile strength andthe fractureelongation of single carbon fiber may be increased up to 9.8% and 13.1%, respectively andhowever the conductivity of carbon fiber is reduced by 11.6%.

Key words:  inorganic non-metallic materials      carbon fiber      graphene oxide      silane coupling agent      grafting     
Received:  13 January 2015     
ZTFLH:  TB321  
About author:  CorrespondingAuthor*To whom correspondence should be addressed, Tel: 13911126076, E-mail: mazk@mail.buct.edu.cn

URL: 

https://www.cjmr.org/EN/10.11901/1005.3093.2015.020     OR     https://www.cjmr.org/EN/Y2016/V30/I3/229

Fig.1  (a) HRTEM of graphene oxide (GO); SEM images of the carbon fibers multi-scale reinforcement with grafted graphene oxide: (b) Carbon fiber (CF) treated with nitric acid; (c) CF-Nitric acid-SilanecouplingagentKH550; (d) CF-GO (1 mg/ml); (e) CF-GO (0.5 mg/ml); (f) CF-GO (0.25 mg/ml); (g) CF-GO (0.125 mg/ml); (h) CF-GO (0.0625 mg/ml)
Fig.2  XPS wide scan energy spectra of T300-6k carbon fiber, (a) CF; (b) CF+GO
Fig.3  C1s spectra of T300-6k carbon fiber: (a) CF; (b) CF+GO
Fiber C/% O/% N/% Si/%
CF 76.5 16.13 1.90 4.46
CF+GO 69.24 17.17 4.47 8.5
Table 1  Surface elements analysis of T300-6k carbon fiber before and after grafting (mass fraction)
Fig.4  FT-IR patterns of the carbon fibers multi-scale reinforcement with grafted graphene oxide: (a) CF- Nitric acid; (b) CF-Nitric acid-Silanecoupling agent; (c) CF-GO
Fig.5  Reaction mechanism of the carbon fibers multi-scale reinforcement with grafted graphene oxide
Fig.6  Raman spectra of the carbon fibers multi-scale reinforcement with grafted graphene oxide: (a) CF; (b) CF+GO (0.25 mg/ml); (c) CF+GO+800℃
Samples D band G band ID/IG
P (cm-1) ID FWHM P (cm-1) IG FWHM
a 1354.4 47.3 271.9 1589.4 43.1 128.6 1.096
b 1326.4 228.6 161.5 1604.9 192.1 98.9 1.190
c 1333.0 127.7 125.3 1603.3 103.0 75.8 1.240
Table 2  D band and G band of Raman for the carbon fibers multi-scale reinforcement with grafted graphene oxide
Samples Graphene oxide
concentration (mg/ml)
Tensile strength
(GPa)
Elongation at
break (%)
Electrical
conductivity (Ω-1cm-1)
a 0 3.72 3.07 664.9
b 1 3.50 3.19 603.6
c 0.5 3.82 3.53 587.8
d 0.25 4.09 3.47 628
e 0.125 3.86 3.60 600.1
f 0.0625 3.85 3.25 613.2
Table 3  Mechanical properties of the carbon fibers multi-scale reinforcement with grafted graphene oxide
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