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首页> 外文期刊>Journal of Applied Polymer Science >A novel ultra-low energy reverse osmosis membrane modified by chitosan with glutaraldehyde crosslinking
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A novel ultra-low energy reverse osmosis membrane modified by chitosan with glutaraldehyde crosslinking

机译：用戊二糖交联用壳聚糖改性的新型超低能量反渗透膜

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The energy consumption of reverse osmosis (RO) has declined significantly since inception and to further decrease the energy consumption is a challenging task. The present article demonstrates the novel method to increase the membrane productivity and reduce energy consumption of desalination. Thin film composite RO (TFC RO) membrane was subjected to 2000 mg/L sodium hypochlorite for 1 h followed by varying concentrations of chitosan and glutaraldehyde for 1 h each to make a hydrophilic supra-molecular assembly of linear polysaccharide over the polyamide layer. RO membrane exposed to 1000 mg/L chitosan and glutaraldehyde each reported 180% increase in water-flux with about 2.7% increase in divalent ion rejection as compared to virgin TFC RO membrane. The superior performance of the membrane was explained by increased hydrophilicity as shown by decline in contact angle from 46.378 to 29.878, increase in surface area ratio from atomic force microscope image analysis, and modification in chemical structure of polyamide from attenuated total reflectance Fourier transform infrared spectroscopy. It was further investigated that curing of glutaraldehyde treated membrane resulted in decreased water-flux because of increase in crosslink density. Thus, an ultra-low energy RO process can be developed based on polyamide-chitosan-glutaraldehyde membrane. (C) 2017 Wiley Periodicals, Inc.
机译：自成立以来，反渗透（RO）的能量消耗显着下降，并进一步降低能源消耗是一项具有挑战性的任务。本文展示了提高膜生产率的新方法，降低脱盐的能耗。将薄膜复合RO（TFC RO）膜进行2000mg / L次氯酸钠1小时，然后改变壳聚糖和戊二醛的浓度为1小时，以在聚酰胺层上进行亲水性多糖的亲水性多糖。 RO膜暴露于1000mg / L壳聚糖和戊二醛，每次报告的水通量增加180％，与原始TFC RO膜相比，二价离子排斥的增加约2.7％。通过从46.378至29.878的接触角下降，从原子力显微镜图像分析增加，从原子力显微镜图像分析增加，从减弱的总反射傅里叶变换红外光谱，通过增加的亲水性提高亲水性，如从46.378到29.878的下降，从原子力显微镜图像分析增加，以及聚酰胺的化学结构的改性。进一步研究了戊二醛处理的膜的固化导致水通量降低，因为交联密度增加。因此，可以基于聚酰胺 - 壳聚糖 - 戊二醛膜来开发超低能量RO方法。 （c）2017 Wiley期刊，Inc。

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