Support material and semipermeable membrane composite material

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

Active Publication Date: 2020-08-14
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 material and semipermeable membrane composite material
  • Support material and semipermeable membrane composite material
  • Support material and semipermeable membrane composite material

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 comprises main body fibers and adhesive fibers, and the support material is provided with two surface areas and an inner area which are arranged in the thickness direction. The inner area is arranged between the two surface areas, the thickness of each surface area is smaller than 1 / 2 ofthe thickness of the support material, the diameter of the first raw material fiber used for forming the adhesive fibers of the surface areas is R1, the diameter of the second raw material fiber usedfor forming the adhesive fibers of the inner area is R2, and R1 is larger than R2. The thickness of the support material can be further reduced when the support material runs under the same pressure,so that a final membrane product can be wound with a larger area of membrane material under the same appearance size, a larger membrane flux is realized, and meanwhile, the membrane manufacturing cost is also reduced. A more compact surface structure is formed in the surface areas, enough smoothness and excellent fuzzing property of the surface of the support material are kept, and higher tensilestrength is provided.

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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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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