甲酸乙酯改性聚酰胺正渗透复合膜的制备及表征

发布时间：2018-07-09 22:10

本文选题：聚酰胺正渗透膜 + 甲酸乙酯　；参考：《水处理技术》2017年11期

【摘要】：针对正渗透膜本身存在较低水通量以及较高反向盐通量的问题,以筛网为支撑的聚砜膜作为底膜,间苯二胺(MPD)和均苯三甲酰氯(TMC)作为水相和有机相单体,不同含量的甲酸乙酯添加在有机相中作为共溶剂,通过界面聚合法制备了高通量的聚酰胺正渗透复合膜。以2 mol/L Na Cl和1 mol/L的MgCl_2作为汲取液,去离子水作为原料液,对所得正渗透膜进行水通量以及反向盐通量的测试。结果表明,在有机相中添加少量甲酸乙酯作为共溶剂时,可以提高膜的通量和效率。通过改变甲酸乙酯的添加量,可以改变膜性能以及形貌。当甲酸乙酯的添加质量分数为4%时,正渗透的水通量能达到未改性膜的2.6倍,同时J_--s/J_v仍维持在较低的水平。
[Abstract]:In order to solve the problem of low water flux and high reverse salt flux in normal permeable membrane, polysulfone membrane supported by sieve mesh was used as base membrane, and resorcinenediamine (MPD) and trimethoyl chloride (TMC) were used as aqueous and organic phase monomers. High throughput polyamide composite membrane was prepared by interfacial polymerization with different content of ethyl formate added in organic phase as co-solvent. Using 2 mol / L NaCl and 1 mol / L MgCl2 as extraction solution and deionized water as raw material, the water flux and reverse salt flux of the membrane were measured. The results showed that the flux and efficiency of the membrane could be improved by adding a small amount of ethyl formate as co-solvent in organic phase. The properties and morphology of the films can be changed by changing the amount of ethyl formate. When the mass fraction of ethyl formate is 4, the water flux of normal permeation is 2.6 times of that of unmodified membrane, while J / J _ v remains at a low level.
【作者单位】：中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室;
【基金】：国家自然科学基金项目(21276246)
【分类号】：TQ051.893

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