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Enhanced chlorine‐resistant and low biofouling reverse osmosis polyimide‐graphene oxide thin film nanocomposite membranes for water desalination
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-08-14 , DOI: 10.1002/pen.25495 Gehad Hamdy 1, 2 , A. Taher 1, 2
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-08-14 , DOI: 10.1002/pen.25495 Gehad Hamdy 1, 2 , A. Taher 1, 2
Affiliation
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The effect of graphene oxide (GO) loading (0.03, 0.06, 0.09, 0.12, and 0.30 wt%) in the aqueous phase on the performance of reverse osmosis (RO) polyimide (PI) thin film composite (TFC) membrane was investigated. TFC and thin film nanocomposite (TFN) membranes were produced through interfacial polymerization and the imide linkage was confirmed by attenuated total reflection Fourier transform infrared spectroscopy. The spongy‐like structure with vertical fingers of RO PI‐GO TFN membranes was explored by top‐surface and cross‐sectional field emission scanning electron microscope (FE‐SEM). The roughness of the membranes was determined. All PI‐GO TFN membranes exhibited enhanced desalination performance in comparison with PI membranes. Samples with 0.06 wt% GO performed the best with a water flux of 31.80 L/m2/h, salt rejection of 98.8%, and very good antibiofouling properties. This hydrophilic membrane displayed significantly enhanced chlorine‐resistance with water flux of 36.3 L/m2/h and salt rejection of 98.5%. This work provides a promising start for designing rapid water permeation PI‐GO TFN membranes in water desalination.
中文翻译：
用于水脱盐的增强型耐氯性和低生物结垢反渗透聚酰亚胺-氧化烯薄膜纳米复合膜
研究了水相中氧化石墨烯（GO）的负载量（0.03、0.06、0.09、0.12和0.30 wt％）对反渗透（RO）聚酰亚胺（PI）薄膜复合（TFC）膜性能的影响。通过界面聚合制备了TFC和薄膜纳米复合材料（TFN）膜，并通过衰减全反射傅里叶变换红外光谱法确定了酰亚胺键。通过顶表面和横截面场发射扫描电子显微镜（FE-SEM）探索了RO PI‐GO TFN膜的垂直指状海绵状结构。测定膜的粗糙度。与PI膜相比，所有PI‐GO TFN膜均表现出增强的脱盐性能。GO含量为0.06 wt％的样品表现最佳，水通量为31.80 L / m 2/ h，除盐率为98.8％，并且具有非常好的防污性能。这种亲水膜显示出显着增强的耐氯性，水通量为36.3 L / m 2 / h，脱盐率为98.5％。这项工作为设计用于海水淡化的快速透水PI‐GO TFN膜提供了一个有希望的起点。
更新日期：2020-10-17
中文翻译：
用于水脱盐的增强型耐氯性和低生物结垢反渗透聚酰亚胺-氧化烯薄膜纳米复合膜
研究了水相中氧化石墨烯（GO）的负载量（0.03、0.06、0.09、0.12和0.30 wt％）对反渗透（RO）聚酰亚胺（PI）薄膜复合（TFC）膜性能的影响。通过界面聚合制备了TFC和薄膜纳米复合材料（TFN）膜，并通过衰减全反射傅里叶变换红外光谱法确定了酰亚胺键。通过顶表面和横截面场发射扫描电子显微镜（FE-SEM）探索了RO PI‐GO TFN膜的垂直指状海绵状结构。测定膜的粗糙度。与PI膜相比，所有PI‐GO TFN膜均表现出增强的脱盐性能。GO含量为0.06 wt％的样品表现最佳，水通量为31.80 L / m 2/ h，除盐率为98.8％，并且具有非常好的防污性能。这种亲水膜显示出显着增强的耐氯性，水通量为36.3 L / m 2 / h，脱盐率为98.5％。这项工作为设计用于海水淡化的快速透水PI‐GO TFN膜提供了一个有希望的起点。
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