Low-resistance high-flux soiling resistant type water treatment membrane and preparation method thereof

Abstract

The invention discloses a low-resistance high-flux soiling resistant type water treatment membrane. The membrane takes a sulfonated polyethersulfone-polysulfone / TiO2 ultrafiltration membrane as a template, FeCl2 as a reducing agent; Fe3O4 nano particles are generated through in-situ chemical sedimentation in basal membrane aperture passages so that Fe3O4 / sulfonated polyethersulfone-polysulfone / TiO2 ultrafiltration membrane is obtained. The invention also discloses a preparation method for the water treatment membrane. The invention has the benefits that TiO2 and membrane material are mixed to enhance the hydrophilcity of the membrane, enlarge membrane flux, improve membrane surface rough degree, delay membrane fouling and prolong membrane service life; with the polyethersulfone, superior chemical stability, heat resistance and mechanical strength are provided; the Fe3O4 is adopted as magnetic medium to combine the magnetic ultrafiltration membrane, and continuous separation of series of materials of different molecular weight ranges is realized through adjusting additional magnetic field. Compared with the prior art, the membrane has the advantages of small resistance, large flux, soiling resistance, long service life and the like.

Description

technical field [0001] The invention relates to the field of polymer membrane separation materials, in particular to a low-resistance, high-flux, pollution-resistant water treatment membrane and a preparation method thereof. Background technique [0002] Ultrafiltration is a green separation technology powered by differential pressure. It has been widely used in industrial fields such as biopharmaceuticals and water treatment due to its advantages of simple operation, no phase separation, low energy consumption, and good treatment effect. In recent years, the research on ultrafiltration membranes has been reported at home and abroad, and the prepared ultrafiltration membranes can be used in fields such as enzyme treatment and wastewater treatment. With the development of membrane separation technology, research and development of high-performance and multi-variety membrane materials has attracted people's attention. The rapid development of polymer blending technology in re...

AI Technical Summary

Problems solved by technology

[0003] In the field of polymer membrane separation materials, polyvinyl chloride (PVC) has excellent acid and alkali resistance and bacteria resistance, but its gel film is prone to spontaneous wrinkling, film-forming property is not very ideal, hydrophilicity is poor, and it is easy to pollute , low flux and other issues limit its further development in the field of ultrafiltration and microfiltration

For example, a polyvinylidene fluoride ultrafiltration membrane blending modification method applied by the Dalian Institute of Chemical Physics, Chinese Academy of Sciences (publication number is CN 101905123 A), this method mainly improves the anti-pollution performance of the membrane, and in terms of hydrophilic performance The improvement is small; at the same time, there are also some that can make the membrane have permanent hydrophilic properties, such as a polysulfone hollow fiber ultrafiltration membrane with permanent hydrophilicity and its manufacturing method (the publication number is CN 1557532 A), although this method improves the membrane Hydrophilic performance, but its manufacturing parameters are many and the process is cumbersome, which affects its industrial production