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    Title: 抗紫外線應用之含二氧化鈦有機-無機混成材料之製備與性質分析
    Other Titles: Preparation and characterization of titania containing organic-inorganic hybrid materials for UV-shielding application
    Authors: 李文貴;Lee, Wen-kuei
    Contributors: 淡江大學化學工程與材料工程學系碩士班
    張正良;Chang, Cheng-liang
    Keywords: 有機-無機混成材料;紫外光遮蔽薄膜;偶合劑;二氧化鈦;organic-inorganic hybrids;UV-Shielding;coupling agent;titania
    Date: 2007
    Issue Date: 2010-01-11 05:40:55 (UTC+8)
    Abstract: 本研究利用溶膠-凝膠法製備含二氧化鈦有機-無機抗紫外線混成材料,藉由添加鈦螯合物的方式改善一般抗紫外線薄膜吸收範圍狹窄、吸收效果不佳等問題。由於螯合劑易受水氣之攻擊而從鈦脫離出來,造成混成薄膜紫外光吸收強度下降,且產生相分離的現象,本研究試以添加大量偶合劑及選用耐候性佳之高分子來改善二氧化鈦的分散性與混成薄膜的耐候性。
    由FT-IR結果顯示合成之有機-無機混成材料結構正確。TGA結果發現含偶合劑系統混成材料的熱性質比不含偶合劑系統好。而比較不同二氧化鈦添加量對混成材料熱性質的影響發現:隨著二氧化鈦添加量增加,材料之熱性質有下降的趨勢。由SEM影像看出,含偶合劑系統混成材料二氧化鈦添加量至40 wt%時,混成薄膜尚無明顯的相分離,表示偶合劑確實使PU與二氧化鈦產生化學鍵結,而有效的防止了二氧化鈦粒子聚集。由UV-Visible曲線得知隨著膜厚增加會有紅移現象的發生,而混成薄膜透光率可達90%以上。經由UPF值的計算發現本研究製備之PU-二氧化鈦混成薄膜UPF值最高到496,而壓克力-二氧化鈦混成薄膜UPF值最高到169,皆具有極優良的抗紫外線效果。經由耐候性測試發現添加大量偶合劑使得螯合劑被無機網狀結構包覆的更緊密、更不易被水氣攻擊,改善了混成薄膜的耐候性。而選用耐候性較佳之高分子亦有助於提升有機-無機混成薄膜之耐候性。
    In this study, sol-gel method was employed to synthesis the titania containing organic-inorganic hybrid material for UV-shielding and the chelating agents were added to improve the defects of the UV-shielding film nowadays such as poor and limited range of UV absorption. Because of the chelating agents being apt to be broken away from the titanium by the attack of the aqueous vapor, lead to the UV-shielding of the hybrid films decreased and produce the microphase separation. In this investigation, the methods which added a large amount of coupling agents and used the polymer with weatherability were used to improve the dispersion of the titania in the polymer matrix and the weatherability of the hybrid films.
    FT-IR results show that organic-inorganic hybrid materials were prepared successfully. TGA results show that the thermal stability of the prepared hybrid films decreased with the increasing titania content. The results of SEM show that there is no microphase separation in the coupling agents containing organic-inorganic hybrid materials with 40wt% titania content. It’s due to chemical bonds are formed between polymer matrix and titania particles by adding a large amount of coupling agents. With the film thickness 5 μm and titania 40 wt%, ultraviolet can be cut off perfectly and the transmittance of the visible light is over 90 %. The experimental results show that the weatherability of the hybrid films increased by adding a large amount of coupling agents and using the polymer with weatherability.
    Appears in Collections:[化學工程與材料工程學系暨研究所] 學位論文

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