Super-hydrophobic polyolefin hollow fiber membrane for oxygenated membrane and preparation method of super-hydrophobic polyolefin hollow fiber membrane

A polyolefin, super-hydrophobic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high production cost of oxygenation membrane, complicated operation, poor blood compatibility, etc. Capacitive, high gas transmission effect

Active Publication Date: 2021-03-23
上海翊科聚合物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These unmodified polymer semipermeable membranes often have the disadvantage of poor hemocompatibility, so the current commercial oxygenated membranes must be used in conjunction with coatings with excellent hemocompatibility, such as the X coating of Terumo in Japan, and the Sodium Coating in Italy. Lin's PH.I.S.I.O.Coating, Medtronic's Trillium and Carmeda Bioactive Surface, etc. These coatings can greatly promote the safety of oxygenated membranes in blood circulation, but the operation is cumbersome, making the production cost of oxygenated membranes higher

Method used

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  • Super-hydrophobic polyolefin hollow fiber membrane for oxygenated membrane and preparation method of super-hydrophobic polyolefin hollow fiber membrane
  • Super-hydrophobic polyolefin hollow fiber membrane for oxygenated membrane and preparation method of super-hydrophobic polyolefin hollow fiber membrane
  • Super-hydrophobic polyolefin hollow fiber membrane for oxygenated membrane and preparation method of super-hydrophobic polyolefin hollow fiber membrane

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preparation example Construction

[0033] Concrete, the first aspect of the present invention provides a kind of preparation method of the superhydrophobic polyolefin hollow fiber membrane that is used for oxygenation membrane, it comprises the steps:

[0034] (1) Preparation of polyolefin casting solution 1: adding polyolefin and nucleating agent to solvent 1, stirring and dissolving, and vacuum degassing to obtain said polyolefin casting solution 1; the solubility parameters of said polyolefin and solvent 1 The absolute value of the difference |Δδ(p,s)| is less than the critical value of the membrane structure transition

[0035] (2) Preparation of polyolefin casting solution 2: adding polyolefin to solvent 2, stirring and dissolving, and degassing to obtain said polyolefin casting solution 2; the absolute value of the solubility parameter difference between said polyolefin and solvent 2 | Δδ(p,d)| is not less than the critical value of the transition of the membrane structure

[0036] (3) Quantitatively...

Embodiment 1

[0065] Embodiment 1: This example provides a kind of superhydrophobic polyolefin hollow fiber membrane that is used for oxygenation membrane, and its preparation method comprises the steps:

[0066] (1) Prepare casting solution 1: add 55wt% isotactic polypropylene, 44wt% dioctyl adipate, and 1wt% tetrabutylphosphine hexafluorophosphate into a high-temperature container, heat and stir at 190°C for 5h to obtain Homogeneous polymer solution, stand at constant temperature and vacuum defoam before use.

[0067] (2) Preparation of casting solution 2: add 35wt% isotactic polypropylene and 65wt% glycerol triacetate into a high-temperature container, heat and stir at 190°C for 4 hours to obtain a uniform polymer solution, and leave it at a constant temperature for vacuum defoaming stand-by.

[0068] (3) Use a metering pump to quantitatively feed the casting solution 1 to the outermost channel of the three-channel spinneret; use a screw extruder and a spinning metering pump to quantita...

Embodiment 2

[0071] Embodiment 2: This example provides a kind of superhydrophobic polyolefin hollow fiber membrane that is used for oxygenation membrane, and its preparation method comprises the steps:

[0072] (1) Prepare casting solution 1: add 55wt% isotactic polypropylene, 20wt% didecyl phthalate, 22wt% dioctyl adipate, and 3wt% dehydroabietic acid alkali metal salt In a high-temperature container, heat and stir at 190° C. for 6 hours to obtain a uniform polymer solution, and stand at constant temperature for vacuum defoaming before use.

[0073] (2) Prepare casting solution 2: add 32wt% isotactic polypropylene, 48wt% glycerol triacetate and 20% di-n-octyl phthalate into a high-temperature container, heat and stir at 190°C for 5h to obtain a uniform The polymer solution was left to stand at constant temperature for vacuum defoaming before use.

[0074] (3) Use a metering pump to quantitatively feed the casting solution 1 to the outermost channel of the three-channel spinneret; use a ...

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Abstract

The invention relates to the technical field of polymer films, in particular to a super-hydrophobic polyolefin hollow fiber membrane for an oxygenation membrane and a preparation method of the super-hydrophobic polyolefin hollow fiber membrane. Polyolefin is used as a raw material, a three-channel spinning nozzle is used, and the material is prepared through a thermally induced phase separation method. A membrane casting solution formed by a polyolefin solvent is a solution system with the highest critical dissolving temperature, polyolefin can be dissolved in the corresponding solvent when the temperature is higher than the highest critical dissolving temperature, and liquid-liquid phase separation occurs when the temperature is lower than the highest critical dissolving temperature. Thepore diameters of the inner surface and the main body structure of the prepared hollow fiber membrane are uniform, and the hollow fiber membrane is of a spongy bicontinuous network structure; the outer layer is composed of spherical crystals which have a certain thickness and are closely arranged; and a composite structure with a spherical crystal structure embedded into a bicontinuous reticular structure is formed close to the outer layer, namely the junction of the outer layer and the membrane main body structure. The hollow fiber membrane prepared by the invention has high gas transmissionproperty, blood compatibility and plasma leakage resistance, can be directly used for extracorporeal membrane pulmonary oxygenation, and can reduce the use of a blood compatibility coating.

Description

technical field [0001] The invention relates to the technical field of polymer films, in particular to a superhydrophobic polyolefin hollow fiber membrane used for oxygenation membranes and a preparation method thereof. Background technique [0002] Oxygenation membrane, as one of the core materials of Extracorporeal Membrane Oxygenation (ECMO) equipment, is a key part of respiratory support in medical emergency equipment. Oxygenation membranes are mostly used in the way of hollow fiber inner cavity for gas and external for blood. The principle is: when any gas component on both sides of the semipermeable membrane has a partial pressure gradient, the corresponding gas molecules will diffuse from the side with high partial pressure to the side with low partial pressure, thereby realizing the oxygenation of human blood. and CO 2 excretion, regulating blood O 2 and CO 2 content. [0003] In terms of materials for the preparation of oxygenated membranes, the main manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/08B01D71/26
CPCB01D71/26B01D69/08B01D67/0002Y02W10/10
Inventor 赵文静查尚文吴杰
Owner 上海翊科聚合物科技有限公司
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