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Double-layer alkali-resisting separation membrane support material and preparing method thereof

A technology for supporting materials and separation membranes, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of poor alkali resistance, poor flexibility, and low strength of separation membrane supports, and improve physical and mechanical properties. and structural stability, reducing resistance and prolonging service life

Active Publication Date: 2017-04-26
FOSHAN S L P SPECIAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the shortcomings in the prior art, provides a double-layer alkali-resistant separation membrane support material and its preparation method, and solves the problems of poor alkali resistance, easy delamination, low strength, and poor flexibility of the separation membrane support body. Without the need for high temperature and hot rolling pressure, it provides a separation membrane support material with good alkali resistance, excellent mechanical properties, and stable morphology and structure.

Method used

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  • Double-layer alkali-resisting separation membrane support material and preparing method thereof
  • Double-layer alkali-resisting separation membrane support material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of the double-layer wet spunlace separation membrane support mainly includes the following steps:

[0033] 1. Blending pulp

[0034] Disperse polypropylene fiber (fiber diameter 6.3 μm, fiber length 5 mm) and ES fiber (3.2 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, control the fiber concentration to 2%, defrost for 40 minutes, and put it into the slurry Pool, add water and polyacrylamide dispersant and stir evenly to make the concentration 0.03%, viscosity 60 seconds, and make coating layer slurry;

[0035] Disperse polypropylene fiber (fiber diameter 14.5 μm, fiber length 5 mm) and ES fiber (10.2 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, control the fiber concentration to 2%, defrost for 40 minutes, and put it into the slurry Pool, add water and polyacrylamide dispersant and stir evenly, so that the concentration is 0.04%, the viscosity is 65 seconds, and it is made into a support layer slurry;

[0036] 2. Web format...

Embodiment 2

[0041] The preparation of the double-layer wet spunlace separation membrane support mainly includes the following steps:

[0042] 1. Blending pulp

[0043] Disperse polypropylene fibers (fiber diameter 7.2 μm, fiber length 5 mm) and PE fibers (melting point 130 ° C, 4.3 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, control the fiber concentration to 2%, and disperse for 40 minutes. Put it into the slurry mixing tank, add water and polyacrylamide dispersant and stir evenly, so that the concentration is 0.03%, the viscosity is 60 seconds, and it is made into a coating layer slurry;

[0044] Disperse polypropylene fibers (fiber diameter 13.8 μm, fiber length 5 mm) and PE fibers (melting point 130 ° C, 12.6 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, control the fiber concentration to 2%, and disperse for 40 minutes. Put it into the slurry mixing tank, add water and polyacrylamide dispersant and stir evenly, so that the concentration is 0.04%, the vi...

Embodiment 3

[0050] Using the same process conditions and processing methods as in Example 2, the difference is that the pressure of the spunlace main thorn is adjusted to 55bar, and the quantitative 79.6g / m 2 Double layer wet spunlace separation membrane support.

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Abstract

The invention discloses a double-layer alkali-resisting separation membrane support material and a preparing method thereof. The double-layer alkali-resisting separation membrane support material comprises a coating layer and a support layer, and is prepared by spunlace and hot rolling calendaring. A thin diameter polypropylene fiber and a meldable fiber are adopted as raw materials by the coating layer, a thick diameter polypropylene fiber and a certain amount of meldable fiber are adopted as the raw materials by the support layer, through the steps of beating, pulp forming and the like, the raw materials are conveyed by different pulp supply systems to double-layer forming wet method equipment to prepare the pulp into a net respectively, and the double-layer alkali-resisting separation membrane support material is formed after spunlace and hot rolling calendarin. The double-layer alkali-resisting separation membrane support material adopts the technology, solves the problem that the double-layer separation membrane support body is poor in alkali resistance, prone to separated layers, low in strength, poor in flexibility and the like, and the double-layer separation membrane support material with an excellent alkaline resistant property, good interlayer binding force, a stable shape and state and moderate hardness and softness is prepared at low hot rolling pressure and temperature.

Description

technical field [0001] The invention belongs to the technical field of material manufacturing for liquid separation and filtration, and in particular relates to a double-layer alkali-resistant separation membrane support material and a preparation method thereof. Background technique [0002] As a new separation technology, membrane technology has been widely used in gas separation, material separation and water treatment, among which membrane products have the largest demand and the most widely used in the field of water treatment. Microfiltration membranes and ultrafiltration membranes are used in water treatment in water purification plants, and reverse osmosis membranes are mainly used in desalination of seawater. In addition, reverse osmosis membranes and nanofiltration membranes are used for the treatment of semiconductor manufacturing water, water heater water, medical water, and pure water for testing. At the same time, in underground wastewater treatment, microfilt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10D06M15/227D06M101/20
CPCB01D69/10D06M15/227D06M2101/20
Inventor 李杰于斌郭玉海申景山何忠孙辉周思远
Owner FOSHAN S L P SPECIAL MATERIALS
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