Effect of a New Water-based Sizing Agent on Properties of Carbon Fibers and Their Composites

doi:10.11901/1005.3093.2018.441

Chinese Journal of Materials Research

2019, Vol. 33

Issue (4): 284-290 DOI: 10.11901/1005.3093.2018.441

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Effect of a New Water-based Sizing Agent on Properties of Carbon Fibers and Their Composites

Guo ZHENG^1,^2,³(

),Yunjie HU^1,³,Cun ZHOU^2,³,Bo WU^2,³,Yongqin QIANG^1,³

1. Department of Environmental and Chemical Engineering，Tianjin Polytechnic University，Tianjin 300387，China
2. School of Textiles，Tianjin Polytechnic University，Tianjin 300387，China
3. Tianjin Engineering Research Center of Textile Fiber Interface Treatment Technology，Tianjin 300270，China

Cite this article:

Guo ZHENG,Yunjie HU,Cun ZHOU,Bo WU,Yongqin QIANG. Effect of a New Water-based Sizing Agent on Properties of Carbon Fibers and Their Composites. Chinese Journal of Materials Research, 2019, 33(4): 284-290.

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Abstract

The surface of carbon fibers was firstly modified with a new water borne sizing agent O3PPA, and then composites of the modified carbon fibers/ polycaprolactam resin were prepared with polycaprolactam resin as matrix. The above prepared products were characterized by means of X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), fiber strength extensometer and universal material testing machine. The results show that the optimum mass fraction and adsorption capacity of O3PPA were 1% and 5mg·g^-1 respectively. The fracture strength of the O3PPA modified carbon fiber monofilament increased by 12% and the dispersibility of short carbon fibers in polycaprolactam resin was significantly improved. Furthermore, the flexural strength and interlaminar shear strength of the modified carbon fibers/polycaprolactam resin composite increased by 35% and 46% respectively compared with those of plain carbon fibers/polycaprolactam resin composite.

Key words: inorganic non-metallic materials fiber material water sizing agent polycaprolactam matrix composites mechanical property

Received: 10 July 2018

ZTFLH:

TQ323.6

Fund: National Key Ressearch and Development Plan of China(2016YFB0303200);Sinopec Projects(217010-2);Sinopec Projects(217010-4)

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	Guo ZHENG
	Yunjie HU
	Cun ZHOU
	Bo WU
	Yongqin QIANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2018.441 OR https://www.cjmr.org/EN/Y2019/V33/I4/284

Fig.1 Effect of emulsion concentration on surface tension and carbon fibre contact angle of O3PPA emulsion

Table 1 Element compositions of the surfaces of unmodified and modified CFs

Fig.2 XPS C1s spectra of unmodified and modified CFs (a) unmodified, (b) CF-O3PPA

Fig.3 FE-SEM images of CFs modified by O3PPA (a) unmodified, (b) 1.0 mg/g, (c) 3.0 mg/g, (d) 5.0 mg/g, (e) 7.0 mg/g, (f) 9.0 mg/g

Fig.4 Contact angle images of CFs before and after O3PPA modification (a) unmodified CF (b) modified CF

Fig.5 Simplified calculation model of contact angle between carbon fibre and polycaprolactam resin

Fig.6 Effect of O3PPA adsorption amount on the dispersion coefficient of carbon fibre

Fig.7 Filament breaking strength of unmodified and modified CFs

Fig.8 Flexure strength of unmodified and modified short CF/polycaprolactam resin composites

Fig.9 ILSS of unmodified and modified CF cloth /polycaprolactam resin composites

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