Aromatic polyamide hollow fiber membrane and its preparation method and application

An aromatic polyamide, fiber membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor heat resistance, poor antibacterial properties, affecting the performance of membrane products, and achieve thermodynamic compatibility. Good, stable interface, not easy to grow fungi

Active Publication Date: 2019-08-23
TIANJIN MOTIMO MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of poor heat resistance and poor antibacterial properties of the hollow fiber membrane in the prior art, which easily form membrane defects and affect the performance of the membrane product, and provide an aromatic polyamide hollow fiber membrane and its preparation method

Method used

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  • Aromatic polyamide hollow fiber membrane and its preparation method and application

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Embodiment 1

[0020] Embodiment 1: A kind of preparation method of aromatic polyamide hollow fiber membrane adopts the following steps:

[0021] 1) Configure the casting solution; the casting solution includes the following components in parts by weight: 30 g of meta-aramid fiber of aromatic polyamide material, compound solvent (dimethylsulfoxide:lithium chloride=4:1 ) 35g, additive vinylpyrrolidone 35g and nano-silver ion 1g;

[0022] 2) Add the casting solution prepared in step 1) into the screw extruder by thermal phase separation method, melt and extrude through the spinneret at 240°C, enter the water bath for solidification and molding, and heat through winding and drawing High temperature resistant polyamide hollow fiber membranes are made through post-treatment process of hollow fiber membranes. The process parameters of other process sections are the same as the current thermally induced phase separation process for membrane production.

Embodiment 2

[0023] The preparation method of embodiment 2 is the same as that of embodiment 1, the only difference is that the components of step 1) casting solution are: 35g of para-aramid fiber, and solvent (dimethylacetamide: calcium chloride=6:1 ) 30g, additive vinylpyrrolidone 30g and nano-silver ions 3g; the melt extrusion temperature of step 2) is 260°C.

Embodiment 3

[0024] The preparation method of embodiment 3 is the same as that of embodiment 1, the only difference is that the components of step 1) casting solution are: 32g of meta-aramid fibers, and solvent (dimethylacetamide: lithium chloride=5:1 ) 20g, additive vinylpyrrolidone 50g and nano-silver ions 5g; the melt extrusion temperature of step 2) is 255°C.

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Abstract

The invention relates to the technical field of membranes, in particular to an aromatic polyamide hollow fiber membrane, a preparation method and application. The method adopts the following steps: firstly, preparing membrane casting liquid: the membrane casting solution comprises the following components in parts by weight: 30 to 35 parts of aromatic polyamide substance, 15 to 35 parts of a compound solvent, 30 to 50 parts of an additive, and 1 to 5 parts of nanometer silver ion; secondly, melting and extruding the membrane casting solution prepared in the first step with a spinneret plate at 240 to 280 DEG C through a thermally induced phase separation method, so as to form a high temperature resistant polyamide hollow fiber membrane. According to the method, the aromatic polyamide substance is molten and extruded at high temperature, so as to form the polyamide hollow fiber membrane, the adding of inorganic ion can effectively improve the solubility of aromatic polyamide and increase the content of the aromatic polyamide in the membrane casting solution, and high-temperature extrusion can improve the heat resistance of the polyamide hollow fiber membrane.

Description

technical field [0001] The invention relates to the technical field of membranes, in particular to an aromatic polyamide hollow fiber membrane, a preparation method and application thereof. Background technique [0002] Nanofiltration and reverse osmosis technology is the most widely used desalination treatment technology, which has the following advantages: 1. There is no phase change, and there is no need to heat the water quality and use instruments during actual operation, which simplifies the operation steps and enhances the actual The use value of the operation. 2. Less energy consumption. 3. Small footprint, simple operation and strong adaptability. 4. No pollution to the environment, the separation process is physical separation and will not pollute the environment. Based on the above advantages, nanofiltration and reverse osmosis technologies have been widely used in seawater desalination, industrial wastewater treatment and reuse, pharmaceutical pure water prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56B01D63/02B01D61/02B01D67/00
Inventor 范宁胡晓宇高旭李梁梁
Owner TIANJIN MOTIMO MEMBRANE TECH
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