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Polyvinylidene fluoride and polyethersulfone blending membrane, production method and uses

A polyvinylidene fluoride and polyethersulfone technology, applied in the field of polyvinylidene fluoride and polyethersulfone blend membranes, to achieve good blood compatibility, long service life, and good steam sterilization resistance

Inactive Publication Date: 2006-05-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far there is no specific data showing how to improve the shrinkage resistance of PVDF films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Formulated according to the following components and composition: PVDF 13.5%; PES 1.5%; PVP 5%; DMAc 80%. Put the above raw materials into the dissolver, under the temperature control of 40-80°C, swell and dissolve to make a casting solution, and 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 seconds, immerse in a water bath. After the raw film floats up from the glass plate, it is fully washed with distilled water, soaked to wash away the solvent, and dried at low temperature after pore-preserving treatment. The area shrinkage rate of the membrane before and after drying is 4.4%, and the water flux is 350L / m 2 .h, the rejection rate of bovine serum albumin is 20%. The membrane can be used in plasma separation, front-line filtration of asc...

Embodiment 2

[0034] 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 0.35ml / r, pump speed 11r / min, air section length 180mm, internal and external solidification The bath is water, and the spinning speed is 28 m / min. It can be assembled after washing and pore-preserving treatment and drying at low temperature. The length shrinkage of the film before and after drying is 6.5%, and the water flux is 500L / m 2 .h, the retention rate of bovine serum albumin is 38%. The membrane can be used in plasma separation, ascites ultrafiltration concentration and reinfusion front-end filtration and water treatment

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PUM

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Abstract

The invention relates to polyvinylidene fluoride / polyethersulfone blending membrane with manufacture method and application. Wherein, the method comprises: blending the materials, adding organic and inorganic additives, preparing casting-film liquid with solvent; making into plate membrane or spinning into hollow fiber membrane with dry-wet method to reduce membrane shrinkage greatly and increase flux obviously. This product can be used in flood filter, blood plasma separation and water treatment.

Description

technical field [0001] The invention relates to polyvinylidene fluoride and polyether sulfone blended membrane, a production method and application. Blend polyvinylidene fluoride and polyethersulfone in an appropriate proportion, add appropriate amount of organic additives and inorganic additives, and prepare a casting solution to make a flat membrane or a hollow fiber membrane by dry-wet spinning . The membrane can be used in hemofiltration, plasma separation, ascites ultrafiltration concentration reinfusion, water treatment and the like. Background of the invention [0002] PVDF (polyvinylidene fluoride) is a crystalline polymer with a glass transition temperature of -39°C, a crystallization melting point of about 170°C, and a thermal decomposition temperature above 316°C. It has excellent mechanical properties, good impact resistance, and wear resistance. , weather resistance and chemical stability. At room temperature, PVDF is not corroded by acids, alkalis, strong ox...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08J5/18C08K5/053C08L81/06
Inventor 武利顺孙俊芬王庆瑞陈雪英朱思君
Owner DONGHUA UNIV
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