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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 easy warping of semi-permeable membrane supporting materials, and achieve the effects of eliminating warping, high strength and good penetration

Active Publication Date: 2021-10-19
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 the semi-permeable membrane support material in the prior art is easy to warp after heat treatment

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

[0055] Composition: The main fiber is a polyester fiber with a high melting temperature, and the binder fiber is a polyester fiber with a low melting temperature, wherein the mass fraction of the main fiber is 60%, and the melting temperature is 260°C. The mass fraction of the binder fiber is 40% , the melting temperature is 180°C.

[0056] After the non-woven fabric is prepared by the dry papermaking method, it is processed by hot pressing, wherein the hot pressing temperature is 200° C. and the linear pressure is 150 kg / cm to obtain the supporting material.

[0057] The main fibers on the coated surface had a cross-sectional major diameter of 6 μm, and the main fibers on the non-coated surface had a cross-sectional major diameter of 10 μm.

[0058] The structure of the above support materials can be referred to Figure 1 to Figure 3 ,in, figure 1 A partial cross-sectional SEM photograph of the support material is shown, wherein the main body fibers 11 and binder fibers 12 ...

Embodiment 2

[0060] Composition: the main fiber is polyester fiber with high melting temperature, the binder fiber is polyester fiber with low melting temperature, the mass fraction of main fiber is 60%, the melting temperature is 265°C, and the mass fraction of binder fiber is 40% , melting temperature is 150°C).

[0061] After the non-woven fabric is prepared by the wet papermaking method, it is processed by hot pressing, wherein the hot pressing temperature is 200° C. and the linear pressure is 150 kg / cm to obtain the supporting material.

[0062] The main fibers on the coated surface had a cross-sectional major diameter of 6 μm, and the main fibers on the non-coated side had a cross-sectional major diameter of 7 μm.

Embodiment 3

[0064] Composition: the main fiber is polyester fiber with high melting temperature, the binder fiber is polyolefin fiber, wherein the mass fraction of main fiber is 60%, the melting temperature is 255°C, the mass fraction of binder fiber is 40%, and the melting temperature is 135°C).

[0065] After the non-woven fabric is prepared by the dry papermaking method, it is processed by hot pressing, wherein the hot pressing temperature is 200° C. and the linear pressure is 150 kg / cm to obtain the supporting material.

[0066] The main fibers on the coated surface had a cross-sectional major diameter of 14 μm, and the main fibers on the non-coated surface had a cross-sectional major diameter of 20 μm.

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Abstract

The invention provides a support material and a semipermeable membrane composite material. The support material includes main fibers, the support material has a coated surface and a non-coated surface oppositely arranged along the thickness direction, along the thickness direction, from the coated surface to 1 / 5 to 1 / 3 of the thickness of the support material, the main fiber of the support material is The long diameter of the section is R 1 R 2 , R 1 < R 2 . The difference in cross-sectional long diameter of the main fibers of the coated surface and the non-coated surface makes the non-coated surface have lower porosity, higher surface density, and stronger bonding strength, which makes it have higher strength than the coated surface, thus It can counteract the stress generated in the process of forming a semi-permeable membrane after the coating surface is coated with a polymer solution, effectively alleviating or even eliminating the occurrence of warping. The coated surface has a high porosity, so that a sufficiently strong force is formed between the semi-permeable membrane and the supporting material.

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, domestic sewage treatment, drug concentration, hemodialysis, food concentration and other fields, semi-permeable membrane, as a high-efficiency filter material, is gradually becoming more and more popular due to its higher efficiency and lower use cost. It has received more and more attention, application and promotion. Semipermeable membranes are generally composed of synthetic resins such as cellulose resins, polyester resins, polysulfone resins, polyamide resins, and fluororesins. When these materials are used as semipermeable membranes, their body strength is low, and it is difficult It can work stably for a long time under the rated working conditions and cannot be used alone. As a solution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/541D04H1/544D04H1/55D04H1/549D04H1/4391D06N3/00B01D69/10
CPCB01D69/10D04H1/4391D04H1/541D04H1/544D04H1/549D04H1/55D06N3/0011D06N2211/30
Inventor 李房周光大林建华
Owner ZHEJIANG FORST NEW MATERIAL RES INST CO LTD