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Polyether-ether-ketone hollow fiber porous membrane and preparation method thereof

A polyetheretherketone and porous membrane technology, which is applied in the field of polyetheretherketone hollow fiber porous membrane and its preparation, can solve the problems of low flux, poor permeability, difficult pore formation of PEEK hollow fiber membrane, etc. Good capacitance, improved membrane permeability, and the effect of solving the problem of porosity caused by melt spinning

Active Publication Date: 2022-05-27
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the technical problem to be solved by the present invention is that the traditional melting method PEEK hollow fiber membrane is difficult to form holes, has poor permeability and low flux. question

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  • Polyether-ether-ketone hollow fiber porous membrane and preparation method thereof
  • Polyether-ether-ketone hollow fiber porous membrane and preparation method thereof
  • Polyether-ether-ketone hollow fiber porous membrane and preparation method thereof

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specific Embodiment approach

[0032] Specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the present invention in detail, and do not limit the protection scope of the claims of the present application.

[0033] The invention provides a preparation method of a polyetheretherketone hollow fiber porous membrane, comprising the following steps:

[0034] Step 1. Preparation of special pellets for polyetheretherketone hollow fiber membrane spinning:

[0035] The polymer porogen and inorganic porogen are compounded into a composite porogen, which is premixed with PEEK resin and additives using a high-speed mixer, fully mixed in an extruder, cooled and pelletized to obtain PEEK hollow fiber membrane spinning Special pellets. The special pellet formulation is: PEEK resin 30-60 wt%, composite porogen 35-65 wt%, additive 0-3 wt%, the sum of each component is 100%, and the polymer in the composite porogen causes porosity The ratio of agent to i...

Embodiment 1

[0048] Step 1. After 52 wt% PEI and 2 wt% nano-silica were ball-milled for 6 h, the temperature was raised to 350 °C, the mixture was uniformly mixed at a high speed, cooled and cooled, and a uniformly mixed composite porogen was obtained by a pulverizer and a grinder. 45 wt% PEEK resin and 1 wt% silicone pellets were premixed with a high-speed mixer, fully kneaded in an extruder, cooled and pelletized to obtain pellets for PEEK hollow fiber membrane spinning.

[0049] Step 2. Set the heating temperature from zone 1 to zone 10 with a temperature gradient of 10 °C, from 280 °C to 370 °C, fully melt the pellets for spinning in the extruder, and spray them through a 3 / 2 mm hollow through a metering pump. The silk assembly was extruded. The inside of the assembly was fed with nitrogen at 100°C at 100ml / min, and stretched twice through the spinneret. After the hollow melt was solidified, it was stretched and wound online at 16 m / min. The PEEK hollow fiber membrane was obtained by s...

Embodiment 2

[0053] Step 1. After ball-milling 50 wt% PEI, 7 wt% potassium chloride, and 2 wt% nano-silica for 6 h, the temperature was raised to 310 °C, and the mixture was uniformly mixed at a high speed. After compounding the porogen, 40wt% PEEK resin and 1wt% silicone particles were premixed with a high-speed mixer, fully kneaded in an extruder, cooled and pelletized to obtain PEEK hollow fiber membrane spinning pellets.

[0054] Step 2. Set the heating temperature from zone 1 to zone 10 with a temperature gradient of 10°C, from 270°C to 360°C, fully melt the pellets for spinning in the extruder, and spray them through a 3 / 2 mm hollow through a metering pump. The silk component was extruded. The inside of the component was injected with nitrogen gas at 150°C at 100ml / min, and stretched by 1 times through the spinneret. After the hollow melt was solidified, it was stretched and wound online at 16 m / min. The PEEK hollow fiber membrane was obtained by soaking in N-methylpyrrolidone solven...

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Abstract

The invention discloses a polyether-ether-ketone hollow fiber porous membrane and a preparation method thereof. The method comprises the following steps: A, compounding a polymer pore-foaming agent and an inorganic pore-foaming agent into a composite pore-foaming agent which can be completely dissolved out, premixing the composite pore-foaming agent with polyether-ether-ketone resin and an additive, and extruding and pelletizing to obtain special granules for spinning the polyether-ether-ketone hollow fiber membrane; and B, fully melting the spinning granules in an extruder, extruding the spinning granules through an annular hollow spinning assembly, introducing gas into the spinning granules, stretching the spinning granules through a spinning nozzle, curing a hollow melt, carrying out online stretching and winding, carrying out heat treatment, carrying out online extraction and elution to obtain the composite pore-foaming agent, and drying to obtain the polyether-ether-ketone hollow fiber membrane. The particle compounding mode of the composite pore-foaming agent can enhance the mixing and dispersing effect of organic / inorganic particles, and agglomeration is avoided; the polyether-ether-ketone hollow fiber membrane with a multi-through microporous structure is obtained through melt extrusion, on-line stretching, sizing and extraction washing forming, the problem of polyether-ether-ketone melt spinning pore forming is effectively solved, the porosity and flux of the membrane are greatly improved, and the membrane is adjustable and controllable.

Description

technical field [0001] The invention relates to the technical field of membranes, in particular to a polyetheretherketone hollow fiber porous membrane and a preparation method thereof. Background technique [0002] As an important form of separation membrane, hollow fiber membrane has the advantages of high packing density per unit volume, no need for support, compact equipment, simple operation and low process energy consumption. A new type of membrane technology product. At present, it has developed into a common key technology in environmental protection, resource recovery, new energy industry and other fields and an important common support for the upgrading of traditional industries. [0003] In recent years, the application scope of hollow fiber membrane technology has rapidly expanded from water treatment and gas separation to special fields such as chemical industry, food, medicine, electronics and energy, and has gradually replaced traditional distillation, extract...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/08B01D69/02B01D71/82
CPCB01D67/0027B01D67/003B01D69/088B01D69/085B01D69/081B01D69/082B01D69/02B01D71/82B01D2325/028B01D2323/50B01D2325/22Y02P20/10
Inventor 赵玉潮黄岩杨浩翟哲王清强金楠
Owner YANTAI UNIV
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