A plate-shaped corrugated membrane diaphragm with uniform pore size and its preparation method

Abstract

The invention relates to a plate-shaped corrugated membrane diaphragm having uniform aperture and a preparation method thereof, which belong to the technical field of sewage processing. According to the invention, a plate-shaped membrane having a corrugated shape is employed, and the method comprises a high-energy radiation etching step, a PET extrusion moulding step and a marking radiation pore-forming step; the PET extrusion moulding step employs a PET extrusion form to form a heterotype diaphragm, a nuclear track membrane moulding technology step is used on the heterotype diaphragm for completing the moulding of the aperture; and the plate-shaped corrugated membrane diaphragm having uniform aperture is prepared. The plate-shaped corrugated membrane diaphragm having uniform aperture has the advantages that PET extrusion moulding and the marking radiation pore-forming technology are combined, the corrugated plate-shaped membrane is obtained through PET extrusion, diaphragm applying while operation can be effectively prevented, the hydrophilic performance of a PET material is stronger than that of PVDF, good aperture uniformity can be guaranteed by the radiation pore-forming technology, and better effect of the plate-shaped corrugated membrane can be obtained through a plurality of effects.

Description

Technical field [0001] The invention relates to a plate-shaped corrugated membrane membrane with uniform aperture and a preparation method thereof, and belongs to the technical field of sewage treatment. Background technique [0002] The traditional flat membrane for sewage has poor pollution resistance, and the materials are mostly PVDF, PTFE, etc., so the hydrophilicity is poor. Although many company scholars have studied modification methods, most of them are temporary hydrophilic modification. As the running time increases, the hydrophilicity will be lost, and it is extremely difficult to actually complete the permanent hydrophilic modification. On the other hand, due to the uneven pore size, it is easy to cause the pollution sequence to change, thereby affecting the overall pollution resistance effect. On the other hand, due to the problem of flat film running and bonding, the filling area cannot be made large. [0003] At this stage, the problem of membrane treatment of sew...

AI Technical Summary

Problems solved by technology

Membrane processing speed and pollution resistance have always been the direction of continuous work for R&D personnel, and related cost issues such as product cost, operating cost, and maintenance cost have always been important issues that hinder the faster and better development of the membrane industry.

[0004] The existing flat membrane has the problems of low filling area and high manufacturing and operating costs due to the lamination of the diaphragm.

Due to the original PVDF raw material, there is a problem of poor hydrophilicity, which restricts the fouling resistance of the membrane

However, the conventional molding method makes it have the problem of uneven pore size distribution, which can lead to uneven fouling of the membrane and affect the overall fouling resistance.

[0005] Existing flat membranes have poor hydrophilicity and pore size uniformity, resulting in poor pollution resistance

And due to the problem of running fit, it is impossible to enlarge the filling area

[0006] The existing diaphragm with a certain corrugated design has complicated molding process, and also has problems such as hydrophilic performance and poor uniformity of pore size.

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