In-situ polymerization mico-crosslinking polyvinylpyrrolidone modified polyether sulfone hollow fiber membrane and preparation method and use thereof

A polyvinylpyrrolidone and in-situ polymerization technology, which is applied in the field of preparation of functional polymer materials, can solve problems such as poor hydrophilic stability, and achieve the effects of stable hydrophilicity, good film-forming property and simple preparation method.

Active Publication Date: 2014-04-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because PVP is very soluble in water, this makes the polyvinylpyrrolidone of film can wash out slowly after modification, and the hydro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put 10 parts of polyethersulfone and 90 parts of N,N-dimethylacetamide into a reaction kettle equipped with a stirrer, thermometer and heater, and dissolve completely at a temperature of 65°C under stirring. Add 10 parts of vinylpyrrolidone, the addition of N,N'-methylenebisacrylamide is 1% of the mole fraction of the reaction monomers, and the addition of azobisisobutyronitrile is 1% of the mole fraction of the reaction monomers. After gradually adding under stirring, react at a temperature of 95° C. for 4 hours to obtain a polyvinylpyrrolidone-modified polyethersulfone solution. After filtering and defoaming, place it for "aging" to obtain a polyethersulfone spinning solution.

[0036] Press-filter the polyethersulfone spinning solution, and use a metering pump to extrude it through two concentric hollow fiber spinnerets. The extrusion speed of the spinning solution is 7ml / min; ℃ water bath for solidification and molding; then stretched and wound in a plasticizing ba...

Embodiment 2

[0038] Put 25 parts of polyethersulfone and 75 parts of N-methylpyrrolidone into a reaction kettle equipped with a stirrer, thermometer and heater, and dissolve completely at a temperature of 65°C under stirring. Add 6 parts of vinylpyrrolidone, the amount of N,N'-methylenebisacrylamide added is 0.5% of the mole fraction of the reaction monomers, and the amount of azobisisobutyronitrile added is 0.25% of the mole fraction of the reaction monomers. After gradually adding under stirring, react at a temperature of 65° C. for 24 hours to obtain a polyvinylpyrrolidone-modified polyethersulfone solution. After filtering and defoaming, place it for "aging" to obtain a polyethersulfone spinning solution.

[0039]Press-filter the polyethersulfone spinning solution, and extrude it through two concentric hollow fiber spinnerets with a metering pump. The extrusion speed of the spinning solution is 3ml / min; ℃ water bath for solidification and molding; then stretched and wound in a plastic...

Embodiment 3

[0041] Put 15 parts of polyethersulfone and 85 parts of N,N-dimethylacetamide into a reaction kettle equipped with a stirrer, thermometer and heater, and dissolve completely at a temperature of 65°C under stirring. Add 20 parts of vinylpyrrolidone, N, N'-methylenebisacrylamide in an amount of 10% of the mole fraction of the reaction monomers, and azobisisobutyronitrile in an amount of 5% of the mole fraction of the reaction monomers. After gradually adding under stirring, react at a temperature of 95° C. for 2 hours to obtain a polyvinylpyrrolidone-modified polyethersulfone solution. After filtering and defoaming, place it for "aging" to obtain a polyethersulfone spinning solution.

[0042] Press-filter the polyethersulfone spinning solution, and extrude it through two concentric hollow fiber spinnerets with a metering pump. The extrusion speed of the spinning solution is 6ml / min; ℃ water bath for solidification and molding; then stretched and wound in a plasticizing bath at ...

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Abstract

The invention discloses an in-situ polymerization mico-crosslinking polyvinylpyrrolidone modified polyether sulfone hollow fiber membrane and a preparation method and a use thereof. The preparation method is characterized by comprising the following steps: adding 10-25 parts of polyether sulfone and 90-75 parts of solvent into a reaction kettle, adding vinyl pyrrolidone accounting for 2-20% of mass of the polyether sulfone solution after the polyether sulfone is dissolved, carrying out a polymerization reaction for 2-24 hours at a temperature of 50-95 DEG C in the presence of a crosslinking agent and an initiator to obtain a polyvinylpyrrolidone modified polyether sulfone solution, stewing to cure the polyvinylpyrrolidone modified polyether sulfone solution to prepare modified polyether sulfone spinning dope, and directly mico-crosslinking polyvinylpyrrolidone between polyether sulfone lattice chains; and preparing a modified polyether sulfone hollow fiber membrane with hydrophilia, protein pollution resistance and anticoagulant function by utilizing a dry spraying-wet spinning method. The membrane is made into a filter and has excellent blood compatibility to be used for purifying blood, and the anti-protein pollution recovery rate is increased from 50% to 95%; the albumin adsorption is decreased from 20 micrograms/cm<2> to 5 micrograms/cm<2>; the activated partial thromboplastin time is increased from 50 seconds to 96 seconds.

Description

technical field [0001] The invention relates to an in-situ polymerized micro-crosslinked polyvinylpyrrolidone modified polyethersulfone hollow fiber membrane and its preparation method and application, belonging to the field of preparation of functional polymer materials. Background technique [0002] Polyethersulfone (PES for short) material is a special engineering plastic that was first successfully developed and commercialized by the British ICI company in 1972. Its brand name is "Victrex PES". PES special engineering plastic, because of its high glass transition temperature and good physical and chemical stability, is a special polymer material for engineering with excellent performance. Polyethersulfone is prepared into a flat membrane or a hollow fiber membrane, which has been widely used in the fields of blood purification and water treatment. As for blood compatibility, there are no research reports and products coming out at home and abroad so far. [0003] There...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D71/68B01D71/38B01D69/08B01D67/00B01D61/00A61M1/18
Inventor 赵长生何超施振强马朗聂胜强程冲覃慧赵伟锋
Owner SICHUAN UNIV
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