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Continuous modification equipment and hydrophilic modification method of e-ptfe hollow fiber membrane

A fiber membrane and hollow technology, applied in the field of continuous modification equipment and hydrophilic modification, can solve the problems of hydrophilic agent loss, large footprint, poor uniformity of hydrophilic layer, etc., to improve production efficiency and automation high effect

Active Publication Date: 2022-04-05
利得膜(北京)新材料技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this kind of hydrophilic method, on the one hand, due to the extremely poor concentration of different positions in the membrane filament wall during soaking, the uniformity of the hydrophilic layer is poor, and at the same time, the adsorption of hydrophilic polymers in the membrane pores mainly depends on the hydrogen bonding force and is easier to fall off. , the hydrophilic agent will be lost together with the water in the later use process, and once the PTFE membrane is dry again, it will lose the microfiltration function; in addition, the production process is discontinuous, and it is carried out in multiple steps in different spaces, and the efficiency is relatively high. Low, and the overall footprint is large

Method used

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  • Continuous modification equipment and hydrophilic modification method of e-ptfe hollow fiber membrane
  • Continuous modification equipment and hydrophilic modification method of e-ptfe hollow fiber membrane
  • Continuous modification equipment and hydrophilic modification method of e-ptfe hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment relates to a method for hydrophilic modification of e-PTFE hollow fiber membranes, comprising the following steps:

[0050] 1. At first install the spool full of e-PTFE hollow fiber membrane filaments (hereinafter referred to as membrane filaments) soaked with ethanol on the wire feeding device 10, and at this time, the membrane filaments are soaked in the water tank attached to the device;

[0051] 2. The e-PTFE hollow fiber membrane is guided by the guide wheel to the polyol polymer infiltration device 11, and passes through the threading channel 18 of the polyol polymer infiltration device 11; the threading channel of the polyol polymer infiltration device 11 18 is filled with a polyol polymer solution with a mass percentage concentration of 1% and a temperature of 30°C through a metering pump to form a pressure of 0.1Mpa. Contact and press into the membrane silk wall hole in the silk channel 18;

[0052] 3. The membrane silk enters the cross-linked ...

Embodiment 2

[0058] This embodiment relates to a method for hydrophilic modification of e-PTFE hollow fiber membranes, comprising the following steps:

[0059] 1. At first install the spool full of e-PTFE hollow fiber membrane filaments (hereinafter referred to as membrane filaments) soaked with ethanol on the wire feeding device 10, and at this time, the membrane filaments are soaked in the water tank attached to the device;

[0060] 2. The e-PTFE hollow fiber membrane is guided by the guide wheel to the polyol polymer infiltration device 11, and passes through the threading channel 18 of the polyol polymer infiltration device 11; The silk channel 18 is filled with a polyol polymer solution with a mass percentage concentration of 2% and a temperature of 50° C. through a metering pump to form a pressure of 0.1 Mpa. The polyol polymer solution is in contact with the membrane silk in the spray plate and pressed into the membrane In the hole of the silk wall;

[0061] 3. The membrane silk en...

Embodiment 3

[0067] This embodiment relates to a method for hydrophilic modification of e-PTFE hollow fiber membranes, comprising the following steps:

[0068] 1. At first install the spool full of e-PTFE hollow fiber membrane filaments (hereinafter referred to as membrane filaments) soaked with ethanol on the wire feeding device 10, and at this time, the membrane filaments are soaked in the water tank attached to the device;

[0069] 2. The e-PTFE hollow fiber membrane is guided by the guide wheel to the polyol polymer infiltration device 11, and passes through the threading channel 18 of the polyol polymer infiltration device 11; the feed liquid chamber of the polyol polymer infiltration device 11 It is filled with a polyol polymer solution with a mass percentage concentration of 1.5% and a temperature of 40°C through a metering pump to form a pressure of 0.1Mpa. The polyol polymer solution is in contact with the membrane silk in the spray plate and pressed into the wall hole of the membr...

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Abstract

The invention relates to the technical field of membrane filament modification, and specifically discloses a continuous modification equipment and a hydrophilic modification method for e-PTFE hollow fiber membrane filaments, including: successively connected filament releasing devices, polyol polymer infiltration device, cross-linked acetal device, cycle heat treatment device, cleaning device, cycle drying device and wire-receiving device, wherein, the wire-releasing device is used to supply e-PTFE hollow fiber membrane silk, and the polyol polymer impregnation device The polyol polymer solution is contained in it. The modified e-PTFE hollow fiber membrane prepared by the above method has permanent hydrophilicity, and the hydrophilic coating is firm and will not fall off during use; and this process can realize the integrated continuous production of the hydrophilic modification of the membrane, greatly improving Improved production efficiency and product quality stability.

Description

technical field [0001] The invention relates to the technical field of membrane filament modification, and specifically discloses a continuous modification device and a hydrophilic modification method for e-PTFE hollow fiber membrane filaments. Background technique [0002] Separation membrane is the core component of membrane technology industrialization and the "chip" of membrane water treatment industry. At present, the commonly used membrane materials are PVDF, PS, PES, PVC, PP, PAN and so on. Polytetrafluoroethylene (PTFE for short) is a new type of material used in the preparation of separation membranes in recent years. Compared with other membrane materials, PTFE membranes have excellent chemical corrosion resistance, high tensile strength, high temperature resistance and high porosity. It has incomparable advantages in zero-emission and chlor-alkali industries. However, PTFE itself is a super-hydrophobic material, and its application in the field of water treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/08B01D67/00
CPCB01D69/08B01D67/0093B01D67/0088B01D2323/46B01D2323/30B01D2325/36B01D2323/12
Inventor 毕飞
Owner 利得膜(北京)新材料技术有限公司
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