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首页> 外文期刊>RSC Advances >Preparation, modification and characterization of polymeric hollow fiber membranes for pressure-retarded osmosis
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Preparation, modification and characterization of polymeric hollow fiber membranes for pressure-retarded osmosis

机译：耐压渗透聚合物中空纤维膜的制备，改性和表征

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摘要

The present study evaluated the performance of polymeric hollow fiber membranes in the pressure-retarded osmosis (PRO) process for power generation. This study systematically investigated ways to develop a high flux and high power density. The polyethersulfone (PES) membrane support was modified by coating with polydopamine (PDA). After polydopamine coating, the effect of an additive during interfacial polymerization to make a thin film composite (TFC) layer on the polydopamine-coated layer was studied. At the time of interfacial polymerization, we added tributyl phosphate (TBP) as an additive in the organic monomer solution to increase the water flux and power density. The modified membranes were then well characterized by ATR-FTIR, SEM, AFM, TEM, porometry, and contact angle analysis; their performance in salt rejection, water permeability, and power density was evaluated. The relationship between the performance of the TBP additive and the physicochemical properties of the polyamide layers, that is, the free volume, surface roughness and hydrophilicity, seemed very high. The experimental results indicate that the addition of TBP additives changes the retention properties of the composite membrane; a certain concentration of TBP additives retained in the membrane increases the membrane water flux along with power density.
机译：本研究评估了中空纤维膜在发电的压力延迟渗透（PRO）过程中的性能。这项研究系统地研究了开发高通量和高功率密度的方法。聚醚砜（PES）膜载体通过涂有聚多巴胺（PDA）进行改性。在聚多巴胺涂层之后，研究了添加剂在界面聚合过程中在聚多巴胺涂层上形成薄膜复合材料（TFC）层的作用。在界面聚合时，我们在有机单体溶液中添加了磷酸三丁酯（TBP）作为添加剂，以提高水通量和功率密度。然后通过ATR-FTIR，SEM，AFM，TEM，孔隙率法和接触角分析对改性膜进行很好的表征。评估了它们在除盐，水渗透性和功率密度方面的性能。 TBP添加剂的性能与聚酰胺层的理化性质之间的关系，即自由体积，表面粗糙度和亲水性之间的关系似乎非常高。实验结果表明，TBP添加剂的加入改变了复合膜的保留性能。保留在膜中的一定浓度的TBP添加剂会增加膜的水通量以及功率密度。

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