利用不同二氧化鈦改質聚偏氟乙烯薄膜方法之比較

A companison of different methods for immobilizing TiO2 on PVDF membrane

楊建華(Jian-Hua yang)

指導教授 ： 游勝傑 ； 林俊德

中原大學/工學院/土木工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201201031

摘要

由於薄膜操作時常有薄膜阻塞，而導致通量下降壓力上升之問題，因此本研究使用四種改質方法，並且使用四種污染物來測試何種薄膜對積垢物阻抗或是恢復能力最佳。四種薄膜基材都使用PVDF(polyvinylidene fluoride)高分子材料，分別使用機械以及手刮各製出PVDF/TiO2、PVDF-AA-TiO2、PVDF/PMMA-TiO2以及PVDF/PVM/MA-TiO2，最終目的皆為在PVDF薄膜上接枝二氧化鈦，改質參數都使用四種改質方法的最佳條件，並以BSA、Glucose、Kaolin以及Sludge為四種污染物進行測試。其結果顯示四種薄膜在最初清水通量時PVDF/PVM/MA-TiO2表現最佳，最差的為PVDF/PMMA-TiO2，其餘兩種薄膜是差不多的，然而污染物BSA操作後，在照射UV後恢復量最高的為PVDF-AA-TiO2，雖然PVDF/PVM/MA-TiO2較不易受到污染，但受到污染後較難以回復，在四種污染物中會造成最大阻抗的為1%的BSA，之後為濃度約10000 mg/L之Sludge，其餘兩種污染物Kaolin以及Glucose所造成的積垢較低。

關鍵字

PVDF高分子薄膜 ； 二氧化鈦 ； 光催化作用 ； 自淨作用 ； PVDF/PVM/MA混合膜 ； PVDF/PMMA混合膜

並列摘要

Membrane fouling is the main issue in the membrane reactor application to separate contaminants from wastewaters, which leads to a decline in flux and increase in pressure. In this study, four different methods for immobilizing TiO2 on PVDF membrane were studied to determine which kind of membrane possesses the superior antifouling capability and high recovery rate. PVDF/TiO2, PVDF-AA-TiO2, PVDF/PMMA-TiO2 and PVDF/PVM/MA-TiO2 were prepared and each of four was immobilized on PVDF membrane under its optimal condition. Four types of contaminants were utilized to detect the antifouling ability of these four modified membranes. There were BSA, Glucose, Kaolin and Sludge. The results showed that PVDF/PVM/MA-TiO2 membrane had the superior initial flux in clean water, and PVDF/PMMA-TiO2 membrane suffered the worst flux decline. The performances of the other two were almost on a par. When employed to filter BSA solution, however, PVDF-AA-TiO2 membrane had the highest flux recovery rate among the four after UV irradiation. Though PVDF/PVM/MA-TiO2 membrane showed the better antifouling ability, it had less recovery performance once fouling took place. Among the four contaminants, 1% BSA solution led to the significant membrane fouling, followed by 10000 mg/L of sludge, and there were less foulants attached onto membrane in both of Kaolin and Glucose solution.

並列關鍵字

PVDF membrane ； TiO2 ； Photocatalytic ； self-cleaning ； PVDF/PVM/MA membrane、PVDF/PMMA membrane

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