In this study, self-cleaning functional fibers were produced by manufacturing fluorinated TiOF₂ and alkoxysilane which is a non-fluorine water repellent. We confirmed that TiOF₂ treated with 450, 500, 550℃ through XRD and FE-SEM analysis can be applied to fiber. In order to investigate the proper co...
In this study, self-cleaning functional fibers were produced by manufacturing fluorinated TiOF₂ and alkoxysilane which is a non-fluorine water repellent. We confirmed that TiOF₂ treated with 450, 500, 550℃ through XRD and FE-SEM analysis can be applied to fiber. In order to investigate the proper concentration, anatase TiO₂ 1, 3, and 5wt% were applied to PET and a photodecomposition experiment was conducted under ultraviolet light. As a result, since efficiency of 95% was observed at a concentration of 3 wt%, so 3 wt% was determined at an appropriate concentration. In addition, in the case of trialkoxysilane, when applying hexadecyltrimethoxysilane 1% stirred for 8 hours, the alkoxysilane could be materialized with super hydrophobic with a static contact angle.
At the same time, In order to simultaneously materialize super hydrophobic and photodecomposition of PET fiber, hexadecyltrimethoxysilane 1 wt% and photocatalyst 3 wt% were applied to measure superhydrophobicity and photodecomposition. First, in order to investigate the action of trimethoxyalkylsilane, the contact angle before and after treating hexadecyltrimethoxysilane was measured. As a result, contact angle of all samples after silane treatment was high and roll-off angle decreased. The TiO₂ of contact angle after the silane treatment was the lowest at 154.48℃ and confirmed an improvement to 161˚ on average by fluorinated the photocatalyst at 450, 500℃. Also, it showed the highest contact angle among the fluorination catalysts. The roll-off angle was somewhat higher at an average of 20° on both samples before silane treatment but decreased to around 10° after silane treatment. Therefore, by fluorinating the photocatalyst, it was confirmed that not only contact angle but also roll-off angle was improved, so that the initial self cleaning function was imparted. Next, in order to investigate the action of TiOF₂ which is a visible light responsive photocatalyst, the photodecomposition under UV and visible light was measured. When exposed for more than 12 hours under visible light, TiO₂ decreased by 25% or more than the photodecomposition under ultraviolet light, whereas in the case of 450℃ TiOF₂, TiOF₂ showing the highest light decomposition efficiency, the maximum efficiency of 85% for ultraviolet light and 98% for visible light was shown. To imvrove this, as a result of carrying out FE-SEM/EDS, nano-sized silane polymer covered the photocatalyst and found a nano-layered structure. Through this result, when a fluorinated catalyst and a non-fluorine-based silane polymer are used directly, a nano-layered structure is formed, and a silane polymer is applied together with a photocatalyst as a binder to exhibit excellent water repellency and photodegradation efficiency.
In this study, self-cleaning functional fibers were produced by manufacturing fluorinated TiOF₂ and alkoxysilane which is a non-fluorine water repellent. We confirmed that TiOF₂ treated with 450, 500, 550℃ through XRD and FE-SEM analysis can be applied to fiber. In order to investigate the proper concentration, anatase TiO₂ 1, 3, and 5wt% were applied to PET and a photodecomposition experiment was conducted under ultraviolet light. As a result, since efficiency of 95% was observed at a concentration of 3 wt%, so 3 wt% was determined at an appropriate concentration. In addition, in the case of trialkoxysilane, when applying hexadecyltrimethoxysilane 1% stirred for 8 hours, the alkoxysilane could be materialized with super hydrophobic with a static contact angle.
At the same time, In order to simultaneously materialize super hydrophobic and photodecomposition of PET fiber, hexadecyltrimethoxysilane 1 wt% and photocatalyst 3 wt% were applied to measure superhydrophobicity and photodecomposition. First, in order to investigate the action of trimethoxyalkylsilane, the contact angle before and after treating hexadecyltrimethoxysilane was measured. As a result, contact angle of all samples after silane treatment was high and roll-off angle decreased. The TiO₂ of contact angle after the silane treatment was the lowest at 154.48℃ and confirmed an improvement to 161˚ on average by fluorinated the photocatalyst at 450, 500℃. Also, it showed the highest contact angle among the fluorination catalysts. The roll-off angle was somewhat higher at an average of 20° on both samples before silane treatment but decreased to around 10° after silane treatment. Therefore, by fluorinating the photocatalyst, it was confirmed that not only contact angle but also roll-off angle was improved, so that the initial self cleaning function was imparted. Next, in order to investigate the action of TiOF₂ which is a visible light responsive photocatalyst, the photodecomposition under UV and visible light was measured. When exposed for more than 12 hours under visible light, TiO₂ decreased by 25% or more than the photodecomposition under ultraviolet light, whereas in the case of 450℃ TiOF₂, TiOF₂ showing the highest light decomposition efficiency, the maximum efficiency of 85% for ultraviolet light and 98% for visible light was shown. To imvrove this, as a result of carrying out FE-SEM/EDS, nano-sized silane polymer covered the photocatalyst and found a nano-layered structure. Through this result, when a fluorinated catalyst and a non-fluorine-based silane polymer are used directly, a nano-layered structure is formed, and a silane polymer is applied together with a photocatalyst as a binder to exhibit excellent water repellency and photodegradation efficiency.
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#photolysis self-cleaning TiOF2 nano-layer structure
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