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Thin-layer composite filter material with 3-dimensional structure and preparation method thereof

A composite filtration and 3-dimensional structure technology, applied in filtration separation, separation methods, chemical instruments and methods, etc., can solve problems such as large pores, inability to coat and form films, and lack of operability

Inactive Publication Date: 2016-07-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional space fabrics cannot be coated into films due to the large pores on the surface.
For the space fabric with the special structure required, there is no corresponding product in the domestic market at present, and it lacks operability

Method used

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  • Thin-layer composite filter material with 3-dimensional structure and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0041] Choose to use warp-knitted 3D mesh, the material is PET long fiber, the flower shape on the surface is diamond-shaped, the thickness is 2.5mm, and the weight is 400 grams per square meter. The non-woven fabric structure is made of PET, with a thickness of 0.2 mm and a weight of 60 grams per square meter. Using electrospinning equipment to electrospin a layer of polyurethane glue with a thickness of 20 microns on the surface of the non-woven fabric, and then press the three-layer structure together on a hot press to form a support material for a 3D composite structure.

Embodiment 2

[0043] Choose to use warp-knitted 3D mesh, the material is PET long fiber, the surface flower shape is quincunx, the thickness is 2.5mm, and the weight is 400 grams per square meter. The non-woven fabric structure is made of PET, with a thickness of 0.2 mm and a weight of 60 grams per square meter. A 20-micron-thick EMA adhesive layer is sprayed on the surface of the non-woven fabric using melt blown technology, and then the three-layer structure is pressed together on a hot press to form a support material for a 3D composite structure.

Embodiment 3

[0045] Choose to use warp-knitted 3D mesh, the material is PET long fiber, the flower shape on the surface is diamond-shaped, the thickness is 3mm, and the weight is 500 grams per square meter. The non-woven structure is made of PET, with a thickness of 0.15 mm and a weight of 50 grams per square meter. A 20-micron-thick EMA adhesive layer is sprayed by meltblown technology, and then the five-layer structure is stacked and pressed together on a hot press to form a support material for a 3D composite structure.

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Abstract

The invention relates to a thin layer composite filtering material with a three-dimensional structure, and a preparation method thereof. The method comprises the following steps: adopting 3D screen cloth as an intermediate flow channel layer, respectively compounding two end surfaces of the 3D screen cloth with a nonwoven fabric layer or a nonwoven composite membrane layer, forming a bonding layer through adopting an electrospinning or melt blowing technology, and adopting hot pressing or ultrasonic pressing to prepare the thin layer filtering material filtering material with a 3D flow guiding structure. The thin layer composite filtering material can be used as a filter material for water treatment and biomedicine separation, can form a membrane on the surface through a phase conversion technology, and can be used in separation membranes in membrane bioreactors.

Description

【Technical field】 [0001] The invention relates to the technical field of thin-layer composite filter materials, in particular to a thin-layer composite filter material with a three-dimensional structure and a preparation method thereof. 【Background technique】 [0002] The flat membrane module is an important structure in the application of membrane bioreactors. The flat membrane element has a large output per unit membrane area, is easy to operate, and is relatively easy to maintain, chemically clean and replace the membrane (Xu Zhenliang, Membrane Water Treatment Technology. Beijing, Chemical Industry Press, 2001). The flat membrane module mainly adopts a plate and frame structure, and the module is made by alternately assembling together in the order of membrane, coarse mesh support material, support plate, coarse mesh support material, and membrane. Its main disadvantage is that due to the weight of the support plate, the large amount increases the cost, and the thicknes...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14
Inventor 杨虎许振良魏永明马晓华
Owner EAST CHINA UNIV OF SCI & TECH