Surface Graft Modification of Domestic PBO Fiber by Atmospheric Air Plasma

doi:10.11901/1005.3093.2020.562

Chinese Journal of Materials Research

2021, Vol. 35

Issue (9): 641-650 DOI: 10.11901/1005.3093.2020.562

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Surface Graft Modification of Domestic PBO Fiber by Atmospheric Air Plasma

CHEN Yizi¹, ZHANG Chengshuang¹^,², CHEN Ping¹(

)

^1.State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
^2.Xi'an Aerospace Composites Research Institute, Xi'an 710025, China

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CHEN Yizi, ZHANG Chengshuang, CHEN Ping. Surface Graft Modification of Domestic PBO Fiber by Atmospheric Air Plasma. Chinese Journal of Materials Research, 2021, 35(9): 641-650.

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Abstract

Polyurethane was grafted onto the surface of domestic poly-p-phenylene benzobisoxazole (PBO) fiber by atmospheric air dielectric barrier discharge plasma, and the effect of sizing agent on grafting reaction was invetigated. The results of XPS analysis show that the surface chemical composition of PBO fiber modified by plasma grafting polyurethane changed greatly. Compared with the simple air dielectric barrier discharge plasma treated one, the PBO fiber modified by plasma grafting polyurethane had more carboxyl groups, and of which the increment for the later one was 64%~189% (without sizing agent) and 102~184% (with sizing agent) respectively. Sizing agent cannot affect the grafting reaction, and the oxazole ring of PBO was destroyed by plasma grafting reaction. However, ATR-FTIR characterization of PBO fibers with sizing agent showed that the oxazole ring characteristic peaks did not change before and after grafting, so there was no evidence for the destruction of PBO molecules in the near surface. The damage of oxazole ring was detected on the grafted PBO fiber without sizing agent. Thus the sizing agent can prevent the damage of DBD plasma on the near surface of the fiber.

Key words: PBO fiber plasma graft surface modified chemical

Received: 25 December 2020

ZTFLH:

V258

Fund: National Natural Science Foundation of China(513030106);Liaoning Revitalization Talents Program(XLYC1802085);Dalian Science and Technology Innovation Fund Project(2019J11CY007);Fundamental Research Funds for the Central Universities(DUT20GF207);Fundamental Research Funds for Key Laboratory of Materials Modification by Laser, Ion and Electron Beams Ministry of Education(KF2004);National Plan for Aerospace Support(617010802)

About author: CHEN Ping, Tel: 18940937998, E-mail: pchen@dlut.edu.cn

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	Yizi CHEN
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https://www.cjmr.org/EN/10.11901/1005.3093.2020.562 OR https://www.cjmr.org/EN/Y2021/V35/I9/641

Table 1 Experimental materials and Sample of polyurethane^[28]

Table 2 Samples of treated PBO fiber

Fig.1 XPS survey spectra of the PBO fiber surface before and after being grafted

Fig.2 XPS N1s spectra of PBO fiber surface before and after being grafted

Fig.3 XPS O1s spectra of PBOs fiber surface before and after being grafted

Table 3 Relative content of carbon groups on the surface of PBOs fiber before and after being grafted

Table 4 Relative content of nitrogen and oxygen groups on the surface of PBO fiber before and after being grafted

Fig.4 ATR-FTIR of PBOs fiber before and after being grafted

Fig.5 ATR-FTIR of PBO fiber (with sizing agent) before and after being grafted

Table 5 Strength ratio of PBOs fiber groups before and after being grafted (%)

Fig.6 Plasma grafting of PBOs fiber (without sizing agent)

Fig.7 Mechanism of plasma grafting PBO fiber

Table 6 Strength ratio of PBO fiber (with sizing agent) groups before and after being grafted (%)

Fig.8 Plasma grafting of PBO fiber (with sizing agent)

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