- 學位論文
氧化石墨烯改質膜材應用於海水淡化
Graphene Oxide Modified Membranes in the Application of Seawater Desalination
摘要
現今是一個人口日益增加、工業發展迅速的時代，用水量的增加以及環境汙染，使水資源匱乏成為全球的重要議題，而利用膜材過濾進行海水淡化是重要的解決方案之一。 本研究探討氧化石墨烯用於膜材改質上的變化，當石墨烯(Graphene)經過改質氧化後，形成接有許多氧化官能基團的氧化石墨烯(Graphene Oxide,GO)，這些氧化官能基會提升其親水性，因此將氧化石墨烯改質在疏水性質的商業膜材聚偏氟乙烯膜(PVDF)上，通過FTIR、PMI的檢測，結果顯示PVDF表面變為親水性質，並且產生縮孔現象，在反洗時能夠維持較高的滲透通量，提升膜材的耐用度，證實改質膜材有達到預期的功效。 研究中也利用回應曲面法對跨膜壓差(15、20、25psi)、改質膜材所加入GO含量(1、1.5、2wt%)、進料濃度(2、2.5、3wt%)進行最佳化探討，得到最大滲透通量648300 kg/m2*hr和最高鹽阻擋率21.6%
並列摘要
Today is a time of increasing population and rapid industrial development, increasing water consumption and environmental pollution make water scarcity an important issue in the world, and the membranes filtration for desalination is one of the important solutions. In this study, graphene oxide (GO) used for the modification of membranes materials. The oxidized functional groups formed on GO will increase its hydrophilicity. Therefore, the graphene oxide was modified on the hydrophobic polyvinylidene fluoride membrane (PVDF) , and the test results of FTIR and PMI, showed that the surface of PVDF became hydrophilic and caused pore shrinking. After backwashing,it can maintain a higher flux and improve the durability of the membrane. By these conditions,the pressure (15, 20, 25 psi), the GO content (1, 1.5, 2 wt%), and the feed concentration (2, 2.5, 3 wt%) ,the results from Response surface methodology showed that the maximum flux was 648300 kg/m2*hr, the highest salt rejection was 21.6%.
參考文獻
延伸閱讀
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