在本研究中，提出了一個使用兩種具有特殊潤濕性分離膜的新穎連續分離分層油-水混合物的程序。透過在聚酯織維紡織品上塗佈高分子奈米顆粒來製備出疏水/親油膜，以及水潤濕的棉紡織品來當作親水/水下疏油膜。接著使用作者先前建立的方法，分別測定油通過疏水/親油膜和水通過親水/水下疏油膜的流動阻力。然後製造如圖1（a）所示的小型串聯分離膜分離器，並在一定流速範圍內實驗量測甲苯和水混合物的連續分離速率。此外，也開發了一個簡單的重力驅動液體流動模型，預測的油、水流率理論值和實驗值的誤差都在 ±4% 以內，此一結果證實了理論模型的正確性。除了串聯分離裝置和低密度的油外，還設計了其他三種不同構造的分離器，如圖 1(b)、1(c)、1(d) 所示，並通過模型進行分析，結果顯示，每種分離器構造都表現出獨特的分離性能。對於特定的連續分離分層油-水混合物，這些預測有利於我們選擇分離器。此外，透過考慮水的入侵壓力和油的入侵壓力，根據文獻中可用的數據，將圖1（a）所示的分離器規模放大，探討實際應用的可行性。

In this study, a novel continuous separation process for stratified oil-water mixtures using two membranes with special wettability was proposed. The hydrophobic/oleophilic membrane was prepared by coating polymeric nanoparticles on polyester fabric. In contrast, water-wetted pristine cotton fabric was used as the hydrophilic/under-water oleophobic membrane. The values of membrane resistance, RM, to the Poiseuille flow of oil through the hydrophobic/oleophilic membrane and water through the hydrophilic/under-water oleophobic membrane were determined by using the methodology, which was established previously by the authors. A small separator with tandem membranes as shown in Fig. 1(a) was then fabricated and used to continuously separate toluene and water mixtures in a range of flow rates. A simple gravity-driven liquid flow model, resulting in the theoretical flow rates within ±4% error for the experimental conditions, was also developed. Such agreement confirmed the model competence for accurate prediction of the separation flow rates. In addition to the separator with tandem membranes and oil of lower density, three other separators with different configurations as shown in Fig. 1(b), 1(c), and 1(d) were also designed and analyzed by the developed models. It was shown that unique separation performance is exhibited by each separator configuration. This is beneficial to the choice of separator for continuous separation of a specific stratified oil/water mixtures. Furthermore, the separator as shown in Fig. 1(a) was scaled up by taking the water intrusion pressure (WIP) and oil intrusion pressure (OIP) into considerations for practical applications. Technical feasibility of large-scale separators was examined based on the data available in the literature.

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