Multifunctional separation sieve mesh preparation method

Abstract

The invention discloses a multifunctional separation sieve mesh preparation method, which comprises: S1, pre-treating, wherein a sieve mesh is placed and washed in a cleaning agent, rinsing is performed with ultrapure water, and drying is performed so as to be spare; S2, soaking the sieve mesh pretreated in the step S1 in a polymer coating solution; S3, hanging and drying the sieve mesh coated inthe step S2, and soaking in an acidic glutaraldehyde solution; S4, taking out the sieve mesh obtained in the step S3, drying, and soaking in an antibacterial surfactant solution; and S5, taking out the sieve mesh soaked in the step S4, and drying to obtain the super-hydrophilic and super-oleophobic sieve mesh. According to the invention, the prepared sieve mesh has super-hydrophilic and super-oleophobic performance, can effectively achieve oil-water separation, has multiple functional groups contained in the coating on the surface of the sieve mesh, has excellent oil-water separation performance, further has performances of heavy metal ion adsorbing, antibacterial property and the like, and has substantially expanded application range.

Description

technical field [0001] The invention relates to the technical field of oily wastewater treatment and screen material surface modification, and more specifically, relates to a preparation method of a multifunctional separation screen. Background technique [0002] Water resources are necessary resources for people's life and production activities. With the growth of population and the development of economy, people are facing increasingly severe water resource problems. Therefore, the recycling and reuse of sewage treatment has become one of the important ways to solve the problem of water resources. With the development of industrialization and urbanization, oily wastewater has become one of the important sources of sewage. Oily wastewater is not only a large amount, but also comes from a wide range of sources, including oil and gas field mining, metal surface cleaning, steel rolling waste liquid, food production, etc. will produce a variety of oily wastewater. These oily...

AI Technical Summary

Problems solved by technology

[0003] Stainless steel screens and polyester screens are commonly used industrial separation materials, but due to the limitation of their surface wettability, these materials cannot be used for the separation of wastewater, especially for the separation of oily wastewater, and for heavy metal ions in oily wastewater can't be separated

Patent CN 107893128 A discloses a preparation method and application of a titanium dioxide / sulfonated graphene oxide / silver nanoparticle composite membrane. The patent uses titanium dioxide to form a rough structure, and sulfonated graphene oxide and silver nanoparticles form a composite membrane. The properties of super-oleophobic and super-hydrophobic under oil are suitable for the oil-water separation process, but the preparation process is very cumbersome, and dangerous substances such as concentrated nitric acid are used, and the manufacturing cost is high.

Patent CN 108671585 A discloses a method for preparing a super-hydrophilic net for oil-water separation. This filter net is formed by attaching Portland cement to the surface of the screen net, but it is resistant to n-hexane, tea oil, peanut oil and other oily substances. The recovery rate is only 94%, and there is still a lot of room for improvement, resulting in the need for other separation membranes for further separation in actual use

Patent CN 109603205 A discloses a preparation method of a stainless steel filter screen for oil-water separation, but the filter screen only has the function of oil-water separation, cannot absorb heavy metals and has no antibacterial activity