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Method for preparing composite particle entangled porous membrane material

A technology for forming composite particles and particles by entanglement, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as poor mechanical strength and short service life, and achieve good shape stability, high mechanical strength, and reliability Applicable effects

Inactive Publication Date: 2016-09-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: Based on the above problems, the present invention provides a preparation method of a composite particle entangled porous membrane material, which overcomes the shortcomings of the original particle entangled porous membrane material such as poor mechanical strength and short service life, and adopts composite The membrane-forming method reinforces and adjusts the structure of the original filter membrane, and prepares a porous membrane material with controllable selective permeability, high mechanical strength, good shape stability and strong applicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A composite particle entangled porous membrane, the membrane material is composed of a filter layer and a reinforcement layer. Wherein the filter layer is a porous film material with a particle entangled microscopic structure, and the reinforcement layer is a stainless steel wire mesh material. Wherein, the mesh size of the stainless steel wire mesh is 10-100 mesh.

[0016] TiO 2 Powder (average particle size 25nm), PTFE microdispersion (60%wt, particle size 0.25μm) and deionized water (conductivity<10μΩ / cm) were mixed uniformly at a mass ratio of 6:2:4. Afterwards, keep the temperature at 70°C, place it on a hot press (1mm thick), and press it repeatedly for 5 times, then press the composite layer of stainless steel wire mesh and the film layer together to form a composite shape. After that, it was pre-dried at 120°C for 30 minutes, and then sintered at 300°C for 3 minutes to obtain a composite particle-entangled porous membrane with shape stability and high mechanic...

Embodiment 2

[0018] A composite particle entangled porous membrane, the membrane material is composed of a filter layer and a reinforcement layer. Wherein the filter layer is a porous film material with a particle entangled microscopic structure, and the reinforcement layer is polypropylene (PP) non-woven fabric.

[0019] Mix powdered activated carbon (100 mesh), polypropylene emulsion (10%) and deionized water in a ratio of 10:1:10. Under the condition of a constant temperature of 110° C., place it in a hot press and press to obtain a porous film of PP entangled activated carbon particles. Under the condition of 150°C, the prepared film and the PP non-woven fabric were thermally pressure-bonded. A composite particle entangled porous membrane with high shape stability is obtained. The membrane can be directly used in air filter elements such as masks and air filters, or used for adsorption and filtration of wastewater and is more durable than uniform symmetrical membranes.

Embodiment 3

[0021] A composite particle entangled porous membrane, the membrane material is composed of a filter layer and a reinforcing rib. Wherein the filter layer is a porous film material with a particle entangled microscopic structure, and the reinforcing rib is nylon fiber.

[0022] Mix powdered activated carbon (100 mesh), polypropylene emulsion (10%), deionized water and nylon fiber (diameter 20 μm, length 1-2 cm) in a ratio of 10:1:10:0.5 and mix evenly. Under the condition of a constant temperature of 125°C, it was placed in a hot press and pressed repeatedly 10 times to obtain a composite porous film reinforced with polypropylene entangled activated carbon particles and nylon fibers. The membrane material has the characteristics of high shape stability and can be used for filtering organic components in gas or oil-water separation process.

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Abstract

The invention relates to a method for preparing a composite particle entangled porous membrane material. The method comprises the step of carrying out composite film forming on function strengthening layers, screens and ribs, which serve as raw materials, and a microporous material by a method for preparing the microporous material through particle entangled forming during the preparation of the microporous material through particle entangled forming or after the microporous material is formed through particle entangled forming, so as to obtain the composite particle entangled porous membrane material. The method has the beneficial effects that the disadvantages of the original particle entangled porous membrane materials that the mechanical strength is poor, the service life is short, and the like are overcome, and a composite film forming method is adopted to carry out strengthening and structural adjustment on the original porous membranes, so that the prepared porous membrane material has the advantages of controllable permselectivity, high mechanical strength, good dimensional stability and high applicability.

Description

technical field [0001] The invention relates to a preparation method of a composite particle entangled porous membrane material. Background technique [0002] Membrane materials have selective separation functions due to their different pore sizes and porosity. The selective separation of membrane materials can realize the separation, purification and concentration of different components of feed liquid. Most of the gas separation membranes currently used are polymer membranes. Commonly used filter membrane materials mainly include polypropylene (PP), polyethylene (PE), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), etc. The filter material of the traditional filter has the disadvantages of short service life, low filtration efficiency, high pressure loss, and limited application range. [0003] The invention patent with the Chinese patent publication number CN103551095A discloses a method for preparing microporous materials by particle winding molding. ...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00
CPCB01D69/12B01D67/0081B01D69/02B01D69/10B01D2325/023B01D2325/24
Inventor 王龙耀宋赛华王岚赵宇培陈群
Owner CHANGZHOU UNIV
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