Abstract Thin-film nanocomposite nanofiltration (TFN) membranes were prepared via interfacial polymerization between polyethyleneimine (PEI) and trimesoyl chloride (TMC) with the incorporation of cellulose nanoparticles (CNCs), for the removal of Cu(II) and Pb(II) from aqueous environment. Water contact angle measurements and pure water test showed that the surface hydrophilicity of TFN membranes was improved with the increment of CNCs concentration. Successful deposition of CNCs on the membrane surface was investigated by FTIR analysis. The SEM and AFM results showed that the incorporation of CNCs resulted in a greater surface roughness and a higher surface area to the membranes. The results indicated that the water permeance of TFN membranes increased by 70% compared to a pristine TFC membrane with the CNCs loading mass of 5.5 µg/cm2, and also exhibited the acceptable and competitive removal efficiency for toxic heavy metal ions (CuSO4 98.0%, CuCl2 96.5% and PbCl2 90.8%). To the best of our knowledge, this is the pioneering work to study the combination between CNCs and positively charged thin film composite nanofiltration membranes fabricated by interfacial polymerization of polyethyleneimine (PEI) and trimesoyl chloride (TMC) on polyethersulfone (PES) supporting membrane for the rejection of Cu(II) and Pb(II).

中文翻译：

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制备掺入纤维素纳米晶体的薄膜纳米复合纳滤膜用于去除 Cu(II) 和 Pb(II)

摘要 通过聚乙烯亚胺 (PEI) 和均苯三甲酰氯 (TMC) 之间的界面聚合制备薄膜纳米复合纳滤 (TFN) 膜，并掺入纤维素纳米颗粒 (CNC)，用于去除其中的 Cu(II) 和 Pb(II)。水环境。水接触角测量和纯水测试表明，TFN膜的表面亲水性随着CNCs浓度的增加而提高。通过 FTIR 分析研究了 CNC 在膜表面上的成功沉积。SEM 和 AFM 结果表明，CNCs 的加入导致更大的表面粗糙度和更大的膜表面积。结果表明，与 CNCs 负载质量为 5.5 µg/cm2 的原始 TFC 膜相比，TFN 膜的透水性提高了 70%，并对有毒重金属离子（CuSO4 98.0%、CuCl2 96.5% 和 PbCl2 90.8%）表现出可接受且具有竞争力的去除效率。据我们所知，这是研究 CNCs 与通过聚乙烯亚胺 (PEI) 和均苯三甲酰氯 (TMC) 在聚醚砜 (PES) 支撑膜上界面聚合制备的带正电荷薄膜复合纳滤膜组合的开创性工作。排斥 Cu(II) 和 Pb(II)。