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Polyvinyl chloride filter membrane with hydrophilic stability

A polyvinyl chloride and stability technology, applied in the field of polyvinyl chloride filtration membranes, can solve the problems of membrane water flux attenuation, high permeation pressure, and high energy consumption, and achieve improved stability, increased strength, and uniform pore size distribution. Effect

Inactive Publication Date: 2018-05-15
刘顶康
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Membrane separation technology is a new type of high-efficiency separation technology. Compared with traditional separation technologies, it has the characteristics of high separation efficiency, low energy consumption, no phase change, and environmental friendliness. It is widely used in petrochemical, food, medicine, and natural substances. In the fields of extraction and concentration, water purification, and wastewater treatment, membrane separation technology is also closely related to energy saving, environmental protection, and resource development. Under the circumstances, the role of membrane technology has been paid more and more attention by various countries. At present, the widely used polymer membrane materials mainly include polyethylene, polypropylene, polyvinylidene fluoride, polyethersulfone, polyacrylonitrile, polyvinyl chloride, etc. In these Among the materials, polyvinyl chloride has the advantages of good chemical stability, easy processing, high mechanical strength, wide range of sources, complete varieties, low price, acid and alkali resistance, and microbial erosion resistance. In principle, it can be used as an off-line separation membrane material. However, like other polymers, polyethylene has strong hydrophobicity, so there are two problems when PVC membrane is used for water medium treatment. One is that the hydrophobicity of the membrane makes the water penetration pressure of the membrane higher. The energy consumption is high, and the second is that the hydrophobicity of the membrane is easy to adsorb and alternate organic matter on the surface of the membrane and in the pores of the membrane, causing membrane fouling and attenuating the water flux of the membrane. Therefore, it is necessary to prepare a polyvinyl chloride membrane to make it hydrophilic and stable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A polyvinyl chloride filter membrane with hydrophilic stability, comprising the following raw materials in parts by weight: 45 parts of modified polyvinyl chloride, 28 parts of hydrophilic polymer, 18 parts of cyclopentadiene, 5 parts of nano-magnesium oxide, shrinkage 1.5 parts of glycerin, 7 parts of biphenyl bisphthalonitrile monomer, 100 parts of solvent;

[0017] The preparation method of the polyvinyl chloride is as follows: by weight, take 100 parts of polyvinyl chloride, 3 parts of triazine compounds, 4 parts of nano-titanium dioxide, 1.5 parts of calcium chloride, and 0.5 parts of calcium-zinc stabilizer and add them to high-speed mixing Mix in the machine, extrude 20mm flakes at a temperature of 120°C, and mold them with a flat vulcanizer at 185°C to obtain the product;

[0018] Wherein, the hydrophilic polymer is obtained by mixing an aldehyde compound and a vinyl alcohol polymer at a weight ratio of 3:3 and reacting for 2.5 hours at a temperature of 50°C; th...

Embodiment 2

[0025] A polyvinyl chloride filter membrane with hydrophilic stability, comprising the following raw materials in parts by weight: 50 parts of modified polyvinyl chloride, 26 parts of hydrophilic polymer, 20 parts of cyclopentadiene, 4 parts of nano-magnesium oxide, shrinkage 2 parts of glycerin, 6 parts of biphenyl bisphthalonitrile monomer, 100 parts of solvent;

[0026] The preparation method of the polyvinyl chloride is as follows: by weight, take 100 parts of polyvinyl chloride, 4 parts of triazine compounds, 3 parts of nano-titanium dioxide, 1 part of calcium chloride, and 0.8 parts of calcium-zinc stabilizer and add them to high-speed mixing Mix in the machine, extrude a 20mm sheet at a temperature of 125°C, and mold it with a flat vulcanizer at a temperature of 190°C to obtain the product;

[0027] Wherein, the hydrophilic polymer is obtained by mixing an aldehyde compound and a vinyl alcohol polymer at a weight ratio of 2:3, and reacting at a temperature of 55°C for 3...

Embodiment 3

[0034] A polyvinyl chloride filter membrane with hydrophilic stability, comprising the following raw materials in parts by weight: 40 parts of modified polyvinyl chloride, 30 parts of hydrophilic polymer, 16 parts of cyclopentadiene, 6 parts of nano-magnesium oxide, shrinkage 1 part of glycerin, 8 parts of biphenyl type bisphthalonitrile monomer, 100 parts of solvent;

[0035] The preparation method of the polyvinyl chloride is as follows: by weight, take 100 parts of polyvinyl chloride, 2 parts of triazine compounds, 5 parts of nano-titanium dioxide, 2 parts of calcium chloride, and 0.2 parts of calcium-zinc stabilizer and add them to high-speed mixing Mix in the machine, extrude 20mm flakes at a temperature of 115°C, and mold them with a flat vulcanizer at 180°C to obtain the product;

[0036] Wherein, the hydrophilic polymer is obtained by mixing an aldehyde compound and a vinyl alcohol polymer at a weight ratio of 4:3 and reacting for 2 hours at a temperature of 45° C.; th...

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PUM

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Abstract

The invention belongs to the technical field of polyvinyl chloride filter membranes and in particular relates to a polyvinyl chloride filter membrane with hydrophilic stability. The polyvinyl chloridefilter membrane comprises the following raw materials in parts by weight: 40-50 parts of modified polyvinyl chloride, 26-30 parts of hydrophilic polymers, 16-20 parts of cyclopentadiene, 4-6 parts ofnanometer magnesia, 1-2 parts of glycidol, 6-8 parts of diphenyl bisphthalonitrile monomers and 100 parts of solvent. Compared with the prior art, the polyvinyl chloride filter membrane has the following advantages that the strength of the polyvinyl chloride filter membrane is improved, and the membrane can operate to be used under higher strength; the stability of the hydrophilic polymers in themembrane can be favorably improved, and the hydrophilic polymers cannot be lost in a use process, so that the hydrophilic stability is guaranteed; due to the combined effect of nanometer magnesia andthe diphenyl bisphthalonitrile monomers, organic matters or colloids can be prevented from being adsorbed, and the polyvinyl chloride filter membrane is easy to clean in the use process; and the polyvinyl chloride filter membrane is scientific in raw material ratio, simple in preparation method, uniform in pore diameter distribution, high in production efficiency and suitable for popularization and use.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl chloride filter membranes, in particular to a polyvinyl chloride filter membrane with hydrophilic stability. Background technique [0002] Membrane separation technology is a new type of high-efficiency separation technology. Compared with traditional separation technologies, it has the characteristics of high separation efficiency, low energy consumption, no phase change, and environmental friendliness. It is widely used in petrochemical, food, medicine, and natural substances. In the fields of extraction and concentration, water purification, and wastewater treatment, membrane separation technology is also closely related to energy saving, environmental protection, and resource development. Under the circumstances, the role of membrane technology has been paid more and more attention by various countries. At present, the widely used polymer membrane materials mainly include polyethylene, polyp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/30B01D67/00
CPCB01D69/125B01D71/30B01D2323/02B01D2323/12B01D2323/30B01D2325/36
Inventor 刘顶康
Owner 刘顶康