Choosing the property of the supporting membrane is crucial in preparing high performing nanofiltration membranes through interfacial polymerization. In this study, an oxygen rich membrane – cellulose triacetate (CTA) – was used to fabricate the support membrane. Polyamide was deposited onto the CTA support using interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC). The concentration of the monomers was optimized. Furthermore, the polyamide layer prepared on CTA support exhibited higher separation efficiency for sodium sulfates and dyes compared to using traditional polysulfone (PSf) support. The oxygen groups of CTA facilitate better adsorption of amines on the surface; thus, using low concentration of PIP could still provide a defect-free polyamide layer. Utilizing the optimum condition, the polyamide/CTA membrane delivered a high pure water flux (operating at 6 bar) of 179.5 L/m²h with the following rejections: Na₂SO₄ = 98.4%; MgSO₄ = 60.3%; MgCl₂ = 15.0%; NaCl = 3.7%; Rose Bengal = 95.5%; Brilliant Blue R = 99.9%; Amido Black 10B = 90.6%; Orange G = 67.3%. Moreover, the polyamide/CTA membrane had excellent stability at a wide range operating conditions.

选择支撑膜的性能对于通过界面聚合制备高性能纳滤膜至关重要。在这项研究中，富氧膜-三醋酸纤维素（CTA）-用于制造支撑膜。使用哌嗪（PIP）和均苯三甲酰氯（TMC）进行界面聚合，将聚酰胺沉积到CTA载体上。优化了单体的浓度。此外，与使用传统的聚砜（PSf）载体相比，在CTA载体上制备的聚酰胺层对硫酸钠和染料的分离效率更高。CTA的氧基团有助于胺更好地吸附在表面上；因此，使用低浓度的PIP仍可提供无缺陷的聚酰胺层。利用最佳条件²小时，但 遭到以下拒绝：Na ₂ SO ₄ = 98.4％；硫酸镁₄  = 60.3％; 氯化镁₂  = 15.0％; 氯化钠= 3.7％; 孟加拉红= 95.5％; 亮蓝色R  = 99.9％；酰胺黑10B = 90.6％; 橙色G  = 67.3％。此外，聚酰胺/ CTA膜在宽范围的操作条件下具有优异的稳定性。