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Improvement of Photo-stability for p-Aramid Fibers by SiO2/TiO2 Sol-Gel Method

Young-il Lee 1 Min-hyuck Jung 1 Muncheul Lee 1

1부산대학교

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ABSTRACT

Aramid fibers are being used increasingly in a wide range of application due to low density, high specific strength, high modulus, and high thermal resistance. But owing to its special physical and chemical structures, it is sensitive to absorb the ultraviolet light which will degrade the fiber`s useful mechanical properties and structure. In this paper, the sol-gel technique was used to improve the photo-stability of p-aramid fibers. TiO2, modified SiO2/TiO2 sol were used as coating solutions. The influence of the such coatings on the photo-stability of p-aramid fiber was investigated by an accelerated photo-ageing method using xenon lamp. The photo-stability of p-aramid fiber showed obvious improvement after the modified silica binding coating. But the amorphous TiO2 sol coatings showed a negative effect. After 144h light exposure,the modified silane binder-coated fibers showed less degradation in mechanical properties with the retained tensile strength greater than about 70% of the original value.

Citation status

* References for papers published after 2022 are currently being built.