Asymmetric hydrophobic polyolefin hollow fiber membrane, preparation method and application thereof

A fiber membrane and hydrophobic technology, applied in the field of membrane materials, can solve the problems of the entry of anesthetic gas hollow fiber membrane, increase the cost of surgery, secondary damage to the physical and mental health of patients, etc., and achieve the effect of high penetration rate and ensuring physical and mental health.

Active Publication Date: 2020-11-06
HANGZHOU COBETTER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to relax the patient, for many medical operations, the patient must fall asleep; therefore, during the operation, it is desirable to add an anesthetic, that is, an anesthetic gas, to the breathing air to provide sedation to the patient; and due to the existing hollow fiber membrane The separation layer is a dense layer, and the outer surface of the separation layer has no holes, which makes it difficult for the anesthetic gas to enter the blood of the human body through the hollow fiber membrane; Inject exces

Method used

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  • Asymmetric hydrophobic polyolefin hollow fiber membrane, preparation method and application thereof
  • Asymmetric hydrophobic polyolefin hollow fiber membrane, preparation method and application thereof
  • Asymmetric hydrophobic polyolefin hollow fiber membrane, preparation method and application thereof

Examples

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Embodiment 1

[0066] A method for preparing an asymmetric hydrophobic polyhydrocarbon hollow fiber membrane, comprising the following steps:

[0067] Step 1: put 40wt% polypropylene into a twin-screw extruder, heat until plasticized, and then add a solvent system consisting of 45wt% methyl-12-hydroxystearic acid and 15wt% dioctyl adipate, Form a mixture, stir and knead at 230°C to obtain a homogeneous casting solution;

[0068] Step 2: extruding the casting solution from a die with a temperature of 215°C to obtain a molded product with an inner surface and an outer surface;

[0069] Step 3: Place the molded product in the air section for preliminary phase separation, the residence time is 10ms; the temperature of the air section is 100°C, and the relative humidity is 30%;

[0070] Step 4: Use methyl-12-hydroxystearic acid as the cooling liquid to cool the molded product, the cooling temperature is 40°C, and the cooling residence time is 55ms;

[0071] Step 5: Then use methyl-12-hydroxyste...

Embodiment 2

[0074] A method for preparing an asymmetric hydrophobic polyhydrocarbon hollow fiber membrane, comprising the following steps:

[0075] Step 1: Put 31wt% polypropylene into a twin-screw extruder, heat until plasticized, then add a solvent system consisting of 46wt% dibutyl sebacate and 23wt% castor oil to form a mixture, and heat it at 255°C Stir and knead to obtain a homogeneous casting solution;

[0076] Step 2: extruding the casting solution from a die with a temperature of 230°C to obtain a molded product with an inner surface and an outer surface;

[0077] Step 3: Place the molded product in the air section for preliminary phase separation, the residence time is 5ms; the temperature of the air section is 105°C, and the relative humidity is 25%;

[0078] Step 4: Use the solvent system (solvent system composed of 46wt% dibutyl sebacate and 23wt% castor oil) used when preparing the casting solution as the cooling liquid to cool the molded product, the cooling temperature is...

Embodiment 3

[0083] A method for preparing an asymmetric hydrophobic polyhydrocarbon hollow fiber membrane, comprising the following steps:

[0084] Step 1: put 48wt% polypropylene into a twin-screw extruder, heat until plasticized, then add a solvent system consisting of 39wt% dibutyl phthalate and 13wt% dioctyl adipate to form a mixture , stirring and kneading at 245°C to obtain a homogeneous casting solution;

[0085] Step 2: extruding the casting solution from a die with a temperature of 220°C to obtain a molded product with an inner surface and an outer surface;

[0086] Step 3: Place the molded product in the air section for preliminary phase separation, the residence time is 15ms; the temperature of the air section is 80°C, and the relative humidity is 35%;

[0087] Step 4: Use dibutyl phthalate as the cooling liquid to cool the molded product, the cooling temperature is 30°C, and the cooling residence time is 60ms;

[0088] Step 5: Then use dibutyl phthalate as the quenching liqu...

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Abstract

The invention provides an asymmetric hydrophobic polyolefin hollow fiber membrane, a preparation method and application thereof. The hollow fiber membrane comprises a support layer and a separation layer, the separation layer comprises an outer surface, and the outer surface comprises a certain number of first holes with a certain aperture; due to the existence of the first holes, anesthetic gaseslike sevoflurane and remifentanil can penetrate through the hollow fiber membrane to enter the blood of a patient, and the patient can be kept in a calm state all the time in the operation process; meanwhile, the dosage of anesthetic in an operation is reduced, the operation cost is reduced, and secondary injury to a patient due to excessive anesthetic is avoided; besides, the hollow fiber membrane also has relatively long plasma permeation time, high tensile strength and elongation at break, meets the requirements of practical application, and is particularly suitable for application to thefields of oxygenation and gas-liquid separation of human blood containing anesthetic gas; in addition, the invention also provides a preparation method of the hollow fiber membrane, and the preparation method is rapid, effective, simple to operate and suitable for large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of membrane materials, and more specifically relates to an asymmetric hydrophobic polyolefin hollow fiber membrane and its preparation method and application. Background technique [0002] In many applications in the fields of chemistry, biochemistry or medicine there is the problem of separating gaseous components from liquids or adding these components to liquids. For these gas exchange processes, membranes are increasingly being used as separation membranes between various liquids and fluids which adsorb or release gaseous components, from which gaseous components are separated or added to these liquids. The fluid here can be a gas or a liquid which contains or absorbs the gas component to be exchanged. Using such membranes, an exchange surface for gas exchange can be provided and direct contact between liquid and fluid can be avoided if necessary. [0003] An important medical application of membrane-b...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D69/02B01D69/10B01D67/00B01D71/26B01D19/00B01D53/22A61M1/16A61M1/36
CPCB01D69/08B01D69/02B01D69/10B01D67/0011B01D71/26B01D19/00B01D53/228A61M1/16A61M1/3621B01D2325/022B01D2325/38A61M2202/0241A61M2202/0007Y02C20/40B01D2323/081B01D2325/02834B01D2325/02833B01D2323/082B01D67/0083B01D69/082B01D2323/12B01D2323/14B01D2323/18B01D2323/22B01D2325/04B01D2325/20B01D2325/24
Inventor 贾建东陈梦泽虞佳黛
Owner HANGZHOU COBETTER TECH CO LTD
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