Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (07): 69-75.doi: 10.13475/j.fzxb.20210202207

• Fiber Materials • Previous Articles     Next Articles

Preparation and ultraviolet light resistance of poly(p-phenylene benzoxazole) fiber coated with nano titanium dioxide

TAN Yanjun1,2(), HUO Qian1,2, LIU Shurui2   

  1. 1. School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. Shaanxi Engineering Research Center of Functional Materials Dyeing and Finishing, Xi'an, Shaanxi 710048, China
  • Received:2021-02-07 Revised:2021-04-13 Online:2021-07-15 Published:2021-07-22

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Abstract:

To solve the problem that the strength of poly(p-phenylenebenzoxazole) (PBO) fiber decreases after ultraviolet light irradiation, the surface of PBO fiber was modified by oxygen plasma to improve its interfacial properties.Nano-TiO2 and silicone finishing agent were coated on the surface of modified PBO fiber to prepare TiO2/PBO composites.The structure and properties of the composites were characterized and analyzed afterwards. The results show that when the oxygen plasma treatment power is 200 W and the treatment time is 200 s, the surface of PBO fiber developed dents leading to a 16% increase in friction coefficient between fibers, and the tensile strength retention rate of the fiber is kept at more than 90%.The contact angle decreases to 52.7 degrees, indicating an increase in surface wettability of the modified PBO fiber.When the mass ratio of nano-TiO2 to silane coupling agent is 1∶1, the surface of TiO2/PBO composite shows raised nano-TiO2 particles.After ultraviolet light irradiation for 200 h, the tensile strength of TiO2/PBO composite becomes 30% less than that of PBO fiber, which indicates that the ultraviolet light resistance of PBO fiber coated with nano-TiO2 is improved.

Key words: poly(p-phenylene benzoxazole) fiber, nano-TiO2, interfacial property, ultraviolet light irradiation, tensile strength

CLC Number: 

  • TQ342.7

Fig.1

Surface morphology of PBO fiber before and after oxygen plasma treatment. (a)PBO fiber;(b)200 W treatment for 60 s;(c)200 W treatment for 120 s;(d)200 W treatment for 240 s"

Fig.2

Effect of oxygen plasma treatment on breaking strength of PBO fiber"

Fig.3

Effect of oxygen plasma treatment on dynamic(a) and static(b)friction coefficient of PBO fiber"

Fig.4

IR spectra of PBO fibers before and after oxygen plasma treatment"

Fig.5

Wettability of PBO fiber before (a) and after (b) oxygen plasma treatment"

Fig.6

Dispersion state of nano-TiO2 and surface morphology of TiO2/PBO composite fiber. (a) Nano-TiO2 dispersions (×2 000); (b) Mass ratio 1:1(×5 000); (c) Mass ratio 2:1(×5 000) "

Fig.7

Effect of UV irradiation time on breaking strength of nano-TiO2/PBO composite fiber "

Fig.8

Fitting curve of strength change of PBO fiber after UV irradiation"

Fig.9

IR spectra of PBO fibers and TiO2/PBO composite fibers after UV irradiation "

Fig.10

XRD curves of nano-TiO2/PBO composite fibers irradiated by ultraviolet light "

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