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Support materials and semipermeable membrane composites

A technology of supporting materials and composite materials, applied in the field of membrane materials, can solve the problems of high filtration capacity and difficult performance

Active Publication Date: 2022-05-20
ZHEJIANG FORST NEW MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a support material and semi-permeable membrane composite material to solve the problem that membrane products in the prior art are difficult to show higher filtration capacity under the same appearance size

Method used

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  • Support materials and semipermeable membrane composites
  • Support materials and semipermeable membrane composites
  • Support materials and semipermeable membrane composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Raw materials for forming the support material: the mass fraction of the main fiber is 70%, and the mass fraction of the binder fiber is 30%, wherein the main fiber is PET, the length is 6mm, and the average diameter is 7 μm, and the binder fiber is PET with low melting point , where R 1 10μm, R 2 is 8 μm, and the length is 5 mm. (The diameter of the binder fiber stock used to form the surface area is R 1 , the diameter of the binder fiber stock used to form the inner region is R 2 ).

[0041] Because two kinds of binder fibers are used, in order to distinguish the fibers in the surface area and the inner area, the non-woven fabric is prepared by wet-laid papermaking with a three-layer inclined wire, and the middle layer is prepared to form the non-woven layer of the inner area. . The non-woven fabric layer is subjected to hot-pressing treatment by using a roller-type hot-pressing device to obtain a support material with a thickness of 0.081 mm, and a support mater...

Embodiment 2

[0043] The difference between embodiment 2 and embodiment 1 is that R 1 30μm, R 2 is 25 μm, a support material with a thickness of 0.082 mm is obtained, and the thickness of the two surface regions is each equal to 1 / 3 of the thickness of the support material. Its performance is tested, and the test results are listed in Table 1.

Embodiment 3

[0045] The difference between embodiment 3 and embodiment 1 is that R 1 2μm, R 2 is 1 μm, a support material with a thickness of 0.073 mm is obtained, and the thickness of the two surface regions is equal to 1 / 5 of the thickness of the support material. Its performance is tested, and the test results are listed in Table 1.

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Abstract

The invention provides a support material and a semipermeable membrane composite material. The support material includes main body fibers and binder fibers, the support material has two surface regions arranged in the thickness direction and an inner region, wherein the inner region is arranged between the two surface regions, and the thickness of each surface region is smaller than that of the support material 1 / 2 of the thickness, the first raw fiber diameter of the binder fiber used to form the surface area is R 1 , the diameter of the second raw fiber used to form the binder fiber of the inner region is R 2 , and R 1 greater than R 2 . When operating under the same pressure, the thickness of the support material can be further reduced, which not only enables the final membrane product to wrap a larger area of ​​membrane material with the same appearance size, thereby achieving greater membrane flux, but also reduces the production cost. membrane cost. The surface area forms a denser surface structure, maintains sufficient smoothness and excellent fluff on the surface of the support material, and provides greater tensile strength.

Description

technical field [0001] The invention relates to the technical field of membrane materials, in particular to a support material and a semipermeable membrane composite material. Background technique [0002] In the fields of seawater desalination, deep purification of drinking water, advanced treatment of domestic sewage, drug concentration, hemodialysis, food concentration and other fields, semi-permeable membrane is an efficient filter material with its higher filtration efficiency and lower operation and maintenance. Cost has gradually received more and more attention, application and promotion. According to the pore size of the semi-permeable membrane, the semi-permeable membrane can be divided into several types such as microfiltration, ultrafiltration, nanofiltration and reverse osmosis membrane. These semipermeable membranes are generally composed of synthetic resins such as cellulose resins, polyester resins, polysulfone resins, polyamide resins, and fluororesins. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/10B01D69/02B01D71/48B01D71/26B01D71/56B01D71/64B01D71/10B01D71/68B01D71/30B01D71/32
CPCB01D69/10B01D69/02B01D71/48B01D71/26B01D71/56B01D71/64B01D71/10B01D71/68B01D71/30B01D71/32Y02A20/131
Inventor 李房周光大林建华
Owner ZHEJIANG FORST NEW MATERIAL RES INST CO LTD
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