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Supporting material and semipermeable membrane composite

A technology of supporting material and semi-permeable membrane, applied in the field of membrane materials, can solve the problem of easy warping of semi-permeable membrane supporting materials, and achieve the effect of eliminating warping, ensuring stable operation and strong bonding strength

Active Publication Date: 2019-11-15
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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  • Supporting material and semipermeable membrane composite
  • Supporting material and semipermeable membrane composite
  • Supporting material and semipermeable membrane composite

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 supporting material and a semipermeable membrane composite. The supporting material comprises a main body fiber, the supporting material is provided with a coated surface anda non-coated surface which are oppositely arranged in the thickness direction, in the thickness direction, the major axis of the section of the main body fiber of the portion, from the coated surfaceto the 1 / 5-1 / 3 of the thickness of the supporting material, of the supporting material is R1, the major axis of the section of the main body fiber of the portion, from the non-coated surface to the 1 / 5-1 / 3 of the thickness of the supporting material, of the supporting material is R2, and R1 is less than R2. The difference of the major axes of the sections of the main body fibers of the coated surface and non-coated surface makes the non-coated surface have lower porosity, larger surface density and higher adhesive strength, and have higher strength than the coated surface, so that the stress generated during the formation of a semipermeable membrane after the coated surface is coated with a polymer solution can be offset, thereby effectively alleviating or even eliminating the occurrence of a warping phenomenon. The coated surface has the higher porosity, so that strong enough force is formed between the semipermeable 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 Applications(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