薄膜塗覆二氧化鈦在紫外光照射下進行之自淨作用特性分析

Characterization of self-cleaning membrane coated with TiO2 particles under UV irradiation

鄒輝祥(Hui-Hsiang Tsou)

指導教授 ： 游勝傑 ； 黃郁慈

中原大學/工學院/土木工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200901159

摘要

以二氧化鈦(TiO2)進行薄膜表面改質，可以增加表面親水性進而提高薄膜通量，擁有光催化作用(Photocatalytic)並得到自淨作用(Self-cleaning)的附加特性，以降低積垢的現象。本研究針對PVDF高分子薄膜，在經過表面或高分子鑄膜液中加入不同含量的TiO2光觸媒之後製成單層式與雙層式PVDF/TiO2混合薄膜，除分析改質後薄膜之基本特性外，並且對偶氮染料RB-5以及大腸桿菌E.coli進行光催化實驗。結果顯示，經由改質過後的PVDF/TiO2混合薄膜對於RB-5偶氮染料具有光降解特性，並對於大腸桿菌E.coli具有降低活性的特性，其降解效果隨TiO2含量增加而增加，光催化作用對於偶氮染料中的有機物結構以及色度具有全面性的降解效果；此外，薄膜對蛋白質積垢現象實驗中，以BSA為蛋白質基質，其結果顯示改質過後的PVDF/TiO2混合薄膜對於BSA所造成的阻抗確實有明顯趨緩之效果，隨TiO2增加，單層PVDF/TiO2薄膜其cake layer及pore blocking所引起的阻抗隨之減少，而降低薄膜積垢現象，但是雙層PVDF/TiO2之總阻抗則因cake layer及pore blocking隨TiO2含量增加進而形成更嚴重之fouling。

關鍵字

積垢阻抗 ； UV/TiO2光催化作用 ； PVDF/TiO2混合薄膜 ； 抗積垢薄膜

並列摘要

The modification of membrane by addition of TiO2 drastically enhances the hydrophilic and antifouling properties of neat membrane. In this study the single and double layer TiO2 entrapped PVDF membranes were prepared by adding different amount of TiO2 into casting solution. The different properties of modified PVDF membrane such as photocatalytic, antibacterial and antifouling were teated using RB5 degradation, E.coli removal and protein (BSA) fouling respectively and results were compared with neat PVDF membrane. The addition of different amount of TiO2 (1-4%) significantly affects the hydrophilicity, pore size, photoactive self-cleaning and antibacterial properties of membrane surface. The result showed that the modified membrane have better antibacterial and photocatalytic activity as compared to neat PVDF membrane and with increasing TiO2 content increases the efficiency of RB5 degradation and E.coli inactivation. The protein (BSA) fouling experiment showed that the total fouling resistance of single layer PVDF/TiO2 membrane was decreased due to reduction of cake layer and pore blocking resistance, while that of double layer PVDF/TiO2 membrane was increased due to increment of cake layer and pore blocking resistances. Reaults showed that flux and TMP of modified membrane can be recovered to its initial value by simple UV rreatment.

並列關鍵字

UV/TiO2Photocatalysis ； Anti-fouling m ； Fouling resistance

參考文獻

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