研究生: |
陳厚甫 Ho-fu Chen |
---|---|
論文名稱: |
二氧化鈦與親水性Silicone Polyester摻合物之光觸媒效果 The photocatalytic effect of blended TiO2 with hydrophilic Silicone Polyester |
指導教授: |
陳耿明
Keng-ming Chen |
口試委員: |
劉興鑑
Sing-jian Liu 王英靖 Ying-jing Wang |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 68 |
中文關鍵詞: | 磷酸鈣 、光觸媒 、親水性聚乙二醇矽氧烷聚酯 、薄膜 |
外文關鍵詞: | Calcium phosphate, Photocatalyst, PEG Silicone Polyester, Film |
相關次數: | 點閱:441 下載:1 |
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本研究是利用磷酸鈣部份包覆光觸媒製備成類似多層構造的複合物,再與不同分子量 PEG 鏈段之 PEG Silicone Polyester 黏著劑,混掺成聚合物,藉以塗佈於基材上,可延緩因光觸媒直接接觸所引發光催化劣解反應,及具有除臭、抗菌及防污效果。以 x-Ray 繞射儀分析晶體結構,結果顯示:光觸媒為銳鈦礦型。以光散射粒徑儀(DLS)與穿透式電子顯微鏡(TEM)分析,結果顯示:光觸媒粒徑約為5~10nm,而磷酸鈣部份包覆光觸媒複合物平均粒徑為375nm。使用亞甲基藍做為光催化降解物,分析各種光源波長之降解速率,經紫外-可見光散射吸收光譜儀(UV/Vis)測試,結果顯示:其降解速率反應,以藍光與紫外光反應速率較佳。以傅立葉(FTIR)與拉曼(Raman)紅外線光譜分析儀,觀察掺合物薄膜,經不同時間UV光(Blacklight,360nm × 1mw/cm2)照射後的分子結構變化中,結果顯示:-OH羥基、-COOH 羧酸基,隨照射時間增加,其3403cm-1之波長吸收峰會逐漸變為寬而強,且會往高頻移動。由此可知:掺合物薄膜經UV光照射後有 -OH 羥基與 -COOH 羧酸基官能基形成。以掃描式電子顯微鏡(SEM)分析掺合物薄膜表面形態與粗糙度,分析經不同時間UV光照射後,檢視掺合物薄膜表面形態之變化。綜合以上結果得知,磷酸鈣部份包覆光觸媒只有部分光觸媒與基材直接接觸,而使用PEG Silicon Polyester 黏著劑因含矽化合物,不易被光觸媒分解,可有效延緩基材發生光催化劣解反應。
This study is to use a calcium phosphate partially covered by a photocatalyst to make a multilayer-like structure compound. Afterwards, it is blended with binders having different molecular PEG segments of PEG Silicone Polyester to be blending polymers. They are used as a coating on the matrix. Therefore, it will delay the reaction of the photocatalytic degradation on the matrix oweing to the direct contact of photocatalyst and have the effects of antibacterial, de-odour and soil-resistance. The results show that the photocatalyst is a sharp titanium ore by the analysis of crystal structure in the x-Ray diffraction measurement. Through the analysis of DLS and TEM, we get the results that the particle sizes are from 5nm to 10nm, and the particle size of the calcium phosphate covered by the photocatalyst compound is 375nm. The methylene blue is used as a photocatalyst degradation material to analyse the degradation speeds in different light sources. Through the measurement of UV/Vis, the results show that the reactive speeds of blue and ultraviolet lights are better in the reaction of degradation speed. FTIR and Raman spectra help us analyze the molecular structure after UV light irradiation. All evidences show that -OH and -COOH groups increase with increasing irradiation time and its absorption peak at 3403cm-1 becomes wide and strong gradually. From the results, we can get that the -OH and -COOH groups will be formed when the film of the blending is irradiated by a UV light. It also shifts to a higher frequency position. The appearance and roughness of the blending membrane surface are analysed in different UV irradiation times by SEM. From above results, we can know that the photocatalyst covered by the calcium phosphate can avoid the direct contact between the photocatalyst and the matrix. And because the PEG Silicone Polyester adhensive contains a silicone compound, it is not easy to be degraded by a photocatalyst and can effectively delay the happening of the photocatalytic degradation in a matrix.
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