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Polyether-ether-ketone hollow fiber membrane as well as preparation method and membrane absorption application thereof

A polyetheretherketone and fiber membrane technology, which is applied in the field of polyetheretherketone hollow fiber hydrophobic membrane for membrane absorption and its preparation, can solve the problem of difficult hydrophobic modification of polyetheretherketone hollow fiber membrane, membrane hydrophobicity and osmotic pressure Insufficient, poor hydrophobic stability and other problems, to achieve the effect of stable membrane structure, avoiding agglomeration and high stability

Active Publication Date: 2022-05-13
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the technical problems to be solved by the present invention are the lack of hydrophobicity and osmotic pressure of traditional membrane absorption membranes, difficulty in hydrophobic modification of polyether ether ketone hollow fiber membranes, complicated process, and poor hydrophobic stability.

Method used

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  • Polyether-ether-ketone hollow fiber membrane as well as preparation method and membrane absorption application thereof
  • Polyether-ether-ketone hollow fiber membrane as well as preparation method and membrane absorption application thereof
  • Polyether-ether-ketone hollow fiber membrane as well as preparation method and membrane absorption application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1. Heat 10 wt% diphenyl sulfone to 180°C to melt, add 5 wt% tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer micropowder, mix and stir evenly at high speed, add 45 wt% PEEK resin, heat up to 340°C, Fully swell and mix evenly, after cooling, pulverize and grind to obtain uniform particles, mix it with 40 wt% polyetherimide porogen through a high-speed mixer; co-extrude through a high-temperature and corrosion-resistant screw extruder Uniform spinning pellets can be obtained after discharging and pelletizing;

[0030] Step 2. The spinning pellets obtained in step 1 are fully melted at 340°C through a screw extruder, quantitatively extruded through a hollow spinning assembly, the screw speed is 8 r / min, 100°C nitrogen gas is introduced into the assembly, and the spinning melt After the body is solidified in the air bath, the primary hollow fiber membrane is obtained after being cooled and solidified in the coagulation bath. Cut 100 cm membrane filaments and h...

Embodiment 2

[0033] Step 1. Heat 10 wt% diphenyl sulfone to 180°C to melt, add 5 wt% polytetrafluoroethylene micropowder, mix and stir evenly at high speed, add 50 wt% PEEK resin, heat up to 330°C, fully swell and mix evenly, cool and pulverize Grind to obtain uniform particles, which are fully mixed with 35 wt% polyetherimide porogen through a high-speed mixer; blended and extruded through a high-temperature and corrosion-resistant screw extruder, and pelletized to obtain uniform spinning silk pellets;

[0034]Step 2. The spinning pellets obtained in Step 1 are fully melted at 340°C through a screw extruder, and quantitatively extruded through a hollow spinneret assembly. The screw speed is 8 r / min. The inside of the assembly is a PEEK hollow braid with an outer diameter of 1.6 mm. Tube, winding speed 7 m / min. After the spinning melt is solidified in an air bath, it is cooled and solidified in a coagulation bath to obtain a nascent hollow fiber membrane. A 100 cm membrane filament was c...

Embodiment 3

[0037] Step 1. Heat 14 wt% diphenyl isophthalate to 150°C to melt, add 6 wt% polytetrafluoroethylene micropowder, mix and stir evenly at high speed, add 45 wt% PEEK resin, heat up to 340°C, fully swell and mix evenly , after cooling, pulverize and grind to obtain uniform particles, which are fully mixed with 35 wt% polyetherimide porogen through a high-speed mixer; Obtain uniform spinning pellets;

[0038] Step 2. The spinning pellets obtained in Step 1 are fully melted at 340°C through a screw extruder, quantitatively extruded through a hollow spinneret assembly, the screw speed is 5 r / min, and the glass fiber with an inner diameter of 1.8 mm is hollow woven tube, the winding speed is 7m / min, the spinning melt is solidified in an air bath, cooled and solidified in a coagulation bath to obtain a nascent hollow fiber membrane. The 80cm membrane filaments were intercepted and held in a stretching machine at 230 ℃. After the fixed-length treatment for 3 hours, the fixed-length s...

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Abstract

The invention discloses a polyether-ether-ketone hollow fiber membrane as well as a preparation method and membrane absorption application thereof. Comprising the following steps: A, premixing a high-temperature-resistant plasticizer, a hydrophobic additive, polyether-ether-ketone resin and a co-melting polymer pore-foaming agent, blending and extruding through an extruder, and pelletizing to obtain spinning granules; and B, melting the spinning granules through a screw extruder, quantitatively extruding through a hollow spinning assembly, introducing inert gas or a high-temperature-resistant braided tube into the assembly, cooling and curing a spinning melt, and then carrying out heat setting treatment, dissolution, extraction, cleaning and drying to obtain the polyether-ether-ketone hollow fiber membrane. The problems of difficult hydrophobic modification and insufficient stability of polyether-ether-ketone are solved through simple premixing and melt blending spinning, the prepared membrane does not need secondary hydrophobic modification such as surface grafting and coating, the water contact angle is larger than 110 degrees, the liquid osmotic pressure is high, the hydrophobic stability is high, the membrane can be stably maintained under harsh conditions such as high temperature, strong acid and alkali, organic solvents and the like, and the preparation method is suitable for industrial production. The method is suitable for severe environment membrane absorption process.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a polyether ether ketone hollow fiber hydrophobic membrane for membrane absorption and a preparation method thereof. Background technique [0002] The trend of global warming is still continuing, and the risk of extreme weather and climate events has further aggravated, which has become the focus of governments and the public in various countries. Separation and recovery of the main greenhouse gas carbon dioxide (CO 2 ) has become a research hotspot. Currently CO 2 Gas separation technologies include: solution chemical absorption, cryogenic fractionation, pressure swing adsorption, cryogenic separation and membrane absorption technologies, etc. [0003] In recent years, the use of hollow fiber porous membranes to remove acid gases from mixed gases has gradually attracted attention. In the absorption and desorption process based on hollow fiber membrane technology, the prese...

Claims

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Application Information

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IPC IPC(8): B01D71/80B01D69/08B01D69/02B01D67/00B01D53/22
CPCB01D71/80B01D69/088B01D69/02B01D67/0016B01D67/0083B01D67/0086B01D53/228B01D53/229B01D2325/38B01D2053/224B01D2257/504Y02C20/40
Inventor 赵玉潮黄岩翟哲杨浩王清强金楠
Owner YANTAI UNIV
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