纳米二氧化钛涂覆聚对苯撑苯并二噁唑纤维的制备及其抗紫外光照射性能

doi:10.13475/j.fzxb.20210202207

摘要/Abstract

摘要：

针对聚对苯撑苯并二噁唑(PBO)纤维经紫外光照射后强力下降的问题,首先采用氧等离子体对PBO纤维表面进行改性,提高其界面性能;然后在改性PBO纤维表面涂覆纳米TiO₂及有机硅整理剂制备TiO₂/PBO复合纤维;最后对复合纤维的结构和性能进行表征与分析。结果表明:当氧等离子体处理功率为200 W、处理时间为200 s时,PBO纤维表面有凹痕,纤维拉伸强力保持率大于90%,摩擦因数增大16%,接触角减小为52.7°,说明PBO纤维的表面润湿性能增大;当纳米TiO₂与硅烷偶联剂质量比为1∶1时,TiO₂/PBO复合纤维表面有沉积凸起的纳米TiO₂颗粒;用紫外光照射200 h后,TiO₂/PBO复合纤维的断裂强力下降率比PBO原纤减少30%,说明纳米TiO₂涂覆后的PBO纤维抗紫外光照射性能提高。

关键词: 聚对苯撑并二噁唑纤维, 纳米TiO₂, 界面性能, 紫外光照射, 拉伸强度

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

中图分类号:

TQ342.7

谭艳君, 霍倩, 刘姝瑞. 纳米二氧化钛涂覆聚对苯撑苯并二噁唑纤维的制备及其抗紫外光照射性能[J]. 纺织学报, 2021, 42(07): 69-75.

TAN Yanjun, HUO Qian, LIU Shurui. Preparation and ultraviolet light resistance of poly(p-phenylene benzoxazole) fiber coated with nano titanium dioxide[J]. Journal of Textile Research, 2021, 42(07): 69-75.

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