Polysulfone ultrafiltration membrane and application thereof to fields of drinking water purification and sewage reuse

Abstract

The invention provides a high-flux polysulfone membrane. NaA molecular sieves subjected to ball milling are mixed with traditional polysulfone casting solution to prepare a hydrophilic molecular sieveblended polysulfone ultrafiltration membrane, the membrane is subjected to hydrothermal crystallization in NaA molecular sieve synthetic solution to enable induction synthesis of intact NaA molecularsieves through ball milling NaA molecular sieve particles at the pore passage edge, and water flux of the membrane is remarkably increased. The polysulfone membrane material prepared according to themethod can be applied to the fields of drinking water purification, sewage reuse and the like.

Description

technical field [0001] The application relates to an organic membrane, in particular to a polysulfone ultrafiltration membrane material with large flux and its application in various fields. Background technique [0002] Polysulfone membrane material is a new type of membrane material developed in recent years. Compared with other types of membrane materials, polysulfone membrane material has the advantages of strong rigidity, chemical corrosion resistance, high temperature resistance and acid and alkali resistance, so its development is extremely Rapidly, it has become the most widely used organic membrane material in modern industry. However, polysulfone membrane materials are hydrophobic membrane materials in nature. In order to further improve the performance of polysulfone membrane materials, many researches on its modification have been carried out. Among them, adding hydrophilic nanoparticles to polysulfone membrane materials to improve the hydrophilicity of polysulf...

AI Technical Summary

Problems solved by technology

Although it is often mentioned in patents that nano-inorganic particles can be molecular sieves, especially NaA molecular sieves, molecular sieves are rarely used in practical applications.

The main reason is that the particle size of molecular sieves, especially NaA molecular sieves, is generally larger than 1 μm, which has poor compatibility with polysulfone polymers, which makes it easier to produce membrane defects, which reduces the separation performance of the membrane.