Abstract

In this study, L-cysteine functionalized POSS nanoparticles were synthesized. The synthesized nanoparticles and methyl-methacrylate were applied to fabrication of polyether-imide-thin film nanocomposite nanofiltration membrane. The ratio of (MMA: NPs) changed to obtain efficient separation performances and good antifouling properties. Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and atomic force microscopy (AFM) analysis were used in membranes characterization. Pure water flux, Na₂SO₄, CrSO₄, Pb(NO₃)₂ and Cu(NO₃)₂ rejection, membrane porosity, mean pore size of membrane and water contact angle were studies. Pure water flux measured 14.3 (L/m².h) for neat membrane whereas that was 11–70.6 for thin-film membranes. Surface hydrophilicity enhanced and roughness, pore size and porosity decreased by increase of MMA:NPs ratio. The highest Na₂SO₄, CrSO₄, Pb (NO₃)₂ and Cu(NO₃)₂ rejection observed 84%, 81%, 83% and 79%, at 0.03 wt.% of MMA:NPs ratio. FRR% measured ~95% at 0.03 wt.% of MMA:NPs ratio whereas it was ~29 for neat membrane.

中文翻译：

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制备具有增强分离性能的PEI纳滤薄膜：从水中去除Cr，Pb和Cu离子

摘要

在这项研究中，合成了L-半胱氨酸官能化的POSS纳米颗粒。将合成的纳米粒子和甲基丙烯酸甲酯应用于聚醚酰亚胺薄膜纳米复合纳米滤膜的制备。（MMA：NPs）的比例改变以获得有效的分离性能和良好的防污性能。膜表征使用了傅里叶变换红外光谱（FTIR），场发射扫描电子显微镜（FESEM）和原子力显微镜（AFM）分析。纯净水通量，Na ₂ SO ₄，CrSO ₄，Pb（NO ₃）₂和Cu（NO ₃）₂研究了截留率，膜孔隙率，膜平均孔径和水接触角。纯净膜的纯净水通量为14.3（L / m ² .h），而薄膜膜的纯净水通量为11–70.6。通过增加MMA：NPs比，表面亲水性增强，粗糙度，孔径和孔隙率降低。在MMA：NPs比为0.03 wt。％时，最高的Na ₂ SO ₄，CrSO ₄，Pb（NO ₃）₂和Cu（NO ₃）₂截留率分别为84％，81％，83％和79％。在MMA：NPs比为0.03 wt。％时，FRR％测得为〜95％，而对于纯净膜，FRR％为〜29。