PTFE膜的疏水性较PV DF膜强，在相同进料条件下，用PTFE膜处理含酚水溶液的分离效率和离子截留率更高。
Because PTFE membrane was more hydrophobic than PVDF membrane, PTFE membrane employed in the treatment of phenol aqueous solution had a better efficiency and a higher ion rejection ratio.
实验表明，所制备的纳滤膜能有效截留二价和多价阳离子，对单价阳离子的截留率极低。
The result showed that bivalent and multivalent cations could be removed effectively, while the rejection of univalent cations was very low.
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