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Polysulfone and polyethy lene base polymer blend membrane, and its preparing and use

A polyvinyl and polymer technology, used in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of low pressure resistance, poor biocompatibility, low strength, etc. High rate, high strength effect

Inactive Publication Date: 2008-12-31
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of them use polysulfone alone as the membrane material, and the prepared membrane has defects such as low strength, low pressure resistance, and poor biocompatibility.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the following components and mass percentages: polysulfone 12%; polyvinylidene fluoride 2%; polyvinylpyrrolidone 5%; polyethylene glycol 10%; dimethylacetamide 71%. Put the above-mentioned raw materials into the dissolver, and at 40°C, swell and dissolve to make a casting solution. The casting solution is filtered and defoamed before use. Keep the clean glass plate and scraper at the same temperature as the casting solution. Pour the casting solution on one end of the glass plate and use a scraper to form a uniform liquid film. After pre-evaporating for 30 minutes, immerse it in a water bath. After the raw film floats up from the glass plate, it is fully washed and soaked in distilled water to remove the solvent, treated with 10% pore-preserving agent methanol for 3 hours, and dried at low temperature after pore-preserving treatment. The water flux of the membrane is 260L / m 2 h, the rejection rate of bovine serum albumin is 80%. The membrane can be applie...

Embodiment 2

[0028] The casting solution in Example 1 is spun into a hollow fiber membrane through a concentric tubular spinneret. The membrane forming process is as follows: metering pump specification 0.40ml / r, pump speed 13r / min, air section length 200mm, internal and external solidification The bath is water at a temperature of 60° C., and the spinning speed is 30 m / min. After the primary film is formed, it can be assembled after being washed with water and pore-preserving treatment and then dried at low temperature. Among them, the filling fluid pressure in the spinneret cavity is 1.5×10 -3 MPa, the filling liquid is 5% ethanol aqueous solution, the membrane water flux is 410L / m 2 h, the rejection rate of bovine serum albumin is 95%. The membrane can be applied to hemofiltration, hemodialysis, ascites ultrafiltration concentration filtration, water treatment and the like.

Embodiment 3

[0030] According to the following components and ingredients: 15% polysulfone; 3% polyvinylidene fluoride; 5% polyvinylpyrrolidone; 5% polyethylene glycol; 72% dimethylacetamide. The above-mentioned raw materials are dissolved to form a membrane according to the method of Example 1, and the membrane water flux is 200L / m 2 h, the retention rate of bovine serum albumin is 87%.

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Abstract

The invention discloses a blended membrane of polysulfone and polyvinyl polymer, including a flat membrane and a hollow fiber membrane, the components of which are polysulfone, polyvinyl polymer and porogen, three components The weight ratio is 5-25: 1-10: 1-20; its preparation method comprises the following steps: (1) preparing casting solution; (2) forming a uniform layer of casting solution on a clean glass plate The liquid layer is pre-evaporated, immersed in a coagulation bath to form a film, washed with water, pore-preserved, and dried to form a flat film; the film-casting liquid is metered by a metering pump and then entered into the concentric circular tube spinneret and squeezed into the air. Dry-wet spinning hollow fiber membrane; can be used in hemofiltration, hemodialysis, ascites ultrafiltration concentration reinfusion and water treatment. As a medical material, the blood compatibility of the invention is good; the membrane material of the invention has high strength, and the membrane is not easy to be broken; under the condition of ensuring high water flux, the protein retention rate is also high.

Description

technical field [0001] The invention relates to a blended membrane, its preparation method and application, in particular to a blended membrane of polysulfone and polyvinyl polymer, its preparation method and its application. Background technique [0002] The existence of the sulfone group in the polysulfone molecule makes it have a much larger polar sulfone group dipole moment than that of general polar solvents, so polysulfone has good stability to general chemical reagents; since the sulfur atom on the sulfone group is at the highest Oxidation state, so polysulfone has strong oxidation resistance and acid and alkali resistance; at the same time, because diphenyl sulfone is an aromatic compound, it is in a highly conjugated state, so its chemical bond can absorb a large amount of radiant heat without making the main bond And the branch bond is broken, which makes polysulfone have better heat resistance; and because of the existence of ether group and isopropylidene group, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D71/26
Inventor 孙俊芬王庆瑞陈雪英何春菊朱思君
Owner DONGHUA UNIV