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Poly (4-methyl-1-pentene) hollow fiber membrane based on green diluent as well as preparation method and application of poly (4-methyl-1-pentene) hollow fiber membrane

A technology of diluent and fiber membrane, applied in the field of poly-4-methyl-1-pentene hollow fiber membrane based on green diluent and its preparation and application, which can solve the problem of large environmental pollution, adverse effects of diluent on human health, etc. low pollution, excellent gas permeability and good mechanical properties

Active Publication Date: 2022-08-02
天津大学温州安全(应急)研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the diluents mentioned in these technical solutions (such as dioctyl phthalate, dimethyl phthalate, dioctyl adipate, etc.) have certain toxicity or carcinogenicity, resulting in poly4 - The preparation of the methyl-1-pentene hollow fiber membrane is a big environmental pollution, and the residual diluent will have adverse effects on human health

Method used

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  • Poly (4-methyl-1-pentene) hollow fiber membrane based on green diluent as well as preparation method and application of poly (4-methyl-1-pentene) hollow fiber membrane
  • Poly (4-methyl-1-pentene) hollow fiber membrane based on green diluent as well as preparation method and application of poly (4-methyl-1-pentene) hollow fiber membrane
  • Poly (4-methyl-1-pentene) hollow fiber membrane based on green diluent as well as preparation method and application of poly (4-methyl-1-pentene) hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] To prepare poly-4-methyl-1-pentene hollow fiber membrane, the steps are as follows:

[0032] Step 1, the poly-4-methyl-1-pentene is mixed with the diluent composed of acetyl trioctyl citrate and acetyl tributyl citrate at 245 ° C and is stirred and melted to form a homogeneous film casting liquid. In the liquid, the mass concentration of poly-4-methyl-1-pentene is 30wt%, and the content of the acetyl tributyl citrate in the diluent is 50wt%.

[0033] Step 2: Extruding the film casting liquid after standing for 12h and defoaming through a spinneret at 230 ° C to form a hollow fiber shape, the extrusion speed is 5ml / min, the composition of the core liquid is the same as that of the mixed diluent, and the core liquid is the same as that of the mixed diluent. The liquid flow was 2ml / min. After passing through an air gap of about 5 cm, the hollow fiber enters the cooling water with a temperature of 20°C under the traction of the winding machine to solidify into a film, and ...

Embodiment 2

[0037] To prepare poly-4-methyl-1-pentene hollow fiber membrane, the steps are as follows:

[0038] Step 1. The poly-4-methyl-1-pentene and the diluent composed of acetyl trioctyl citrate and trioctyl citrate are mixed and melted at 245°C to form a homogeneous film casting liquid. Among them, the mass concentration of poly-4-methyl-1-pentene is 20 wt %, and the content of the trioctyl citrate in the diluent is 20 wt %.

[0039] Step 2: Extruding the film casting liquid after standing for 12 hours and defoaming through a spinneret at 230°C to form a hollow fiber shape, the extrusion speed is 10ml / min, the composition of the core liquid is the same as that of the mixed diluent, and the core liquid is the same as that of the mixed diluent. The liquid flow was 1.5ml / min. After passing through an air gap of about 5 cm, the hollow fiber enters the cooling water with a temperature of 20°C under the traction of the winding machine to solidify into a film, and the winding speed is con...

Embodiment 3

[0043] To prepare poly-4-methyl-1-pentene hollow fiber membrane, the steps are as follows:

[0044] Step 1. The poly-4-methyl-1-pentene is mixed with a diluent composed of acetyl trihexyl citrate, acetyl tributyl citrate and tributyl citrate at 250 ° C, stirring and melting to form a homogeneous casting The film liquid, in the film casting liquid, the mass concentration of poly-4-methyl-1-pentene is 30wt%, the content of acetyl tributyl citrate in the diluent is 40wt%, and the content of tributyl citrate is 40wt%, the balance is acetyl trihexyl citrate.

[0045] Step 2: Extruding the film casting liquid after standing for 12h and defoaming through a spinneret at 230°C to form a hollow fiber shape, the extrusion speed is 10ml / min, and the composition of the core liquid is the same as that of the diluent. The flow rate was 1.5ml / min. After passing through an air gap of about 5 cm, the hollow fiber enters the cooling water with a temperature of 20 °C under the traction of the w...

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Abstract

The invention discloses a poly (4-methyl-1-pentene) hollow fiber membrane based on a green diluent, the preparation and use of the membrane are environment-friendly, safe and non-toxic green diluent, and the diluent is a mixed solvent of a poly (4-methyl-1-pentene) good solvent and a poly (4-methyl-1-pentene) weak solvent. The good solvent is composed of one or two of acetyl trihexyl citrate and acetyl trioctyl citrate, the weak solvent is composed of one or two of acetyl tributyl citrate, tributyl citrate and trioctyl citrate, and the weak solvent not only can adjust the compatibility of the polymer and the diluent, but also can enhance the mechanical property of the film. The prepared hollow fiber oxygenation membrane is of an asymmetric structure, comprises a loose porous supporting layer and a compact skin layer, has excellent gas permeability and good mechanical properties, and is particularly suitable for an ECMO membrane type oxygenator. The preparation process is simple, the operability is high, amplification is easy, the inner diameter and the outer diameter of the hollow fiber oxygenation membrane are adjustable, and the repeatability is good.

Description

technical field [0001] The invention relates to the field of membranes, in particular to a preparation method and application of a poly-4-methyl-1-pentene hollow fiber membrane based on a green diluent. Background technique [0002] Extracorporeal Membrane Oxygenation (ECMO) is an advanced extracorporeal life support technology. It uses extracorporeal circulation to drain venous blood from the body to the body, and uses the blood pump as the driving force for blood delivery. 2 and CO 2 The arterial blood is returned to the body after gas exchange. ECMO is a necessary medical equipment in the treatment of patients with cardiopulmonary trauma, pneumonia, lung transplantation and other thoracotomy and severe respiratory failure. It is also an auxiliary medical equipment for cardiovascular surgery. Among them, the membrane oxygenator is the core component of the ECMO system and is called an "artificial lung", which performs oxygenation of the blood and removal of carbon dioxid...

Claims

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Application Information

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IPC IPC(8): B01D71/26B01D69/08B01D67/00
CPCB01D71/26B01D69/08B01D67/0011B01D67/0013
Inventor 潘福生姜忠义张润楠杜宇倩邵丽萍
Owner 天津大学温州安全(应急)研究院
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