Preparation method of polyether sulfone functional separation membrane supporting dendritic polyamide-amine functional group

Abstract

A preparation method of a polyether sulfone functional separation membrane supporting a dendritic polyamide-amine functional group includes the steps of: 1) performing chloroacetylation and aminationmodification treatment to polyether sulfone successively and preparing chloroacetylchlorine-diethylenetriamine-polyether sulfone separation membrane chips; 2) with methyl acrylate and ethylenediamineas main reagents, performing modification to the membrane chips by means of Michael addition and amidation reactions with plasma irradiation grafting synergistic technology; 3) preparing the polyethersulfone functional separation membrane supporting the dendritic polyamide-amine functional group via phase-transfer technology. The method is simple, wherein the grafting efficiency of the dendriticpolyamide-amine functional group is high. The functional group has large supporting quantity in the separation membrane, is stable in the separation membrane and is not liable to lose. The polyether sulfone functional separation membrane can remove heavy metals and phosphates in water body high-effectively and has a board application prospect in the field of water pollution control.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane. Background technique [0002] With the rapid development of the national economy and the rapid expansion of industrial production, the discharge of industrial wastewater containing heavy metal pollutants is increasing day by day, which has led to a series of problems such as serious surface water and groundwater pollution, soil pollution, and food safety. national attention. As we all know, heavy metal pollutants have non-biodegradable properties, which can be transmitted in organisms through the food chain, and their bioaccumulation increases step by step, and can eventually accumulate in organisms, which seriously endangers the survival of organisms and ultimately human health. . In addition, phosphates can lead to eutrophication of water bodies, which in turn deteriorates environmental water bodies and damages the reproduction and growth of aquatic organisms and drinking water...

AI Technical Summary

Problems solved by technology

However, this technology has a low efficiency of grafting dendritic polyamide-amine groups on the surface of the hollow fiber membrane, and the adsorption efficiency of heavy metal ions is low. In addition, the process time for preparing the membrane is very long, which is not suitable for industrial production.

The patent with publication number CN103553195A mentions the use of ethylenediamine and methyl acrylate to synthesize dendritic polyamide-amine and hyperbranched polyamide-amine composite heavy metal water treatment agent. The heavy metal wastewater treatment agent prepared by this technology can effectively realize Cu 2+ 、Cr 6+ 、Ni 2+ , Zn 2+ Adsorption and removal of various heavy metal pollutants such as heavy metal pollutants, but the liquid adsorbent prepared by this patented technology, although its heavy metal adsorption treatment efficiency is high, its recovery and reuse are difficult, and its engineering disposal performance of heavy metal pollution is not good.

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