本研究使用天然材料製造具有超親水及水下超疏油特性的高分子/纖維素複合材料，所有的改質材料皆擁有高於 160 °的水下油接觸角。超親水海藻酸鈉/氧化鈣改質布料可分離各種不同的油水混合液，並且於酸、鹼和高鹽的環境中也能保持其分離效能，其分離通量最大達 42500 L m −2h−1，濾液油含量低於 10 ppm，且在經過 150 分鐘的循環測試後也能保持其分離效能。壓縮過的超親水海藻酸鈉/氧化鈣改質棉花則可用來分離各種油多水少乳化液以及各種水多油少乳化液，油多水少乳化液的分離通量在重力過濾下最高可達 17300 L m −2h−1，負壓條件下 (0.025 bar) 最高可達 2380000 L m −2h−1bar −1，並且濾液油純度皆高於 99.99wt%，經過 20 次循環分離測試後仍能保持其效能；水多油少乳化液的分離通量在重力過濾下最高可達 7454 L m −2h−1，負壓條件下 (0.025 bar) 最高可達 308100L m −2h−1bar −1，並且分離效益皆高於 99%，經過 20 次循環分離測試後仍能保持其效能。改質後的棉花具有與原始棉花相似的生物可分解特性。超親水植酸/蛋白改質布料同樣可以分離各種不同的油水混合液，通量最大達 58200 L m −2h−1，濾液油含量低於 5 ppm，且在經過 50 次的循環測試後仍能保持其效能。

In this study, we prepared superhydrophilic and underwater superoleophobic polymer/cellulose composites from natural materials. The underwater oil contact angles of our materials were higher than 160°. The superhydrophilic sodium alginate/calcium oxide-modified fabric can be used to separate various oil/aqueous solution mixtures including pure water, acidic and basic solutions. The separation flux was up to 42500 L m −2h −1and oil content in the filtrate was lower than 10 ppm. The compressed superhydrophilic sodium alginate/calcium oxide-modified raw cotton can be used to separate various oil-in-water and various water-in-oil emulsions. The separation flux of the oil-in-water emulsion was up to 17300 L m −2h−1 under gravity conditions, and 2380000 L m −2h −1bar −1under external pressure (0.025 bar), and the oil purity in all filtrates was higher than 99.99 wt%. The separation flux of the water-in-oil emulsion is up to 7454 L m −2h −1under gravity conditions, and 308100 L m −2h −1bar −1 under external pressure (0.025 bar), and the separation efficiency for all tests was higher than 99%. The modified raw cotton showed similar biodegradability to that of pristine cotton. The super-hydrophilic phytic acid/egg white proteins-modified fabric can be used to separate various oil/water mixtures. The separation flux was up to 58200 L m −2h −1 and the oil content in the filtrate was less than 5 ppm. The modified fabric maintained its performance after 50 cycles of separation test.

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