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Hollow fiber ultrafiltration membrane with antibacterial and antifouling functions and preparation method thereof

An ultrafiltration membrane, anti-pollution technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The effect of membrane pore blockage and good ultrafiltration capacity

Active Publication Date: 2017-04-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a hollow fiber ultrafiltration membrane with antibacterial and anti-pollution functions and its preparation method, so as to effectively solve the membrane pollution and membrane pores of the hollow fiber ultrafiltration membrane during use. clogging problem

Method used

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  • Hollow fiber ultrafiltration membrane with antibacterial and antifouling functions and preparation method thereof
  • Hollow fiber ultrafiltration membrane with antibacterial and antifouling functions and preparation method thereof
  • Hollow fiber ultrafiltration membrane with antibacterial and antifouling functions and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Preparation of spinning solution

[0036] Using methacryloyloxyethyltrimethylammonium chloride (METAC) and poly(ethylene glycol) methyl ether methacrylate (P(EG)MEMA) as reaction monomers, measure 15 kg of polysulfone as the membrane substrate, METAC 5kg, P(EG)MEMA 1kg, solvent N,N-dimethylformamide 85kg, cross-linking agent ethylene glycol dimethacrylate with 1% total molar weight of reactive monomers and 1% total reactive monomer weight The initiator azobisisobutyronitrile;

[0037] Add the reaction monomer, cross-linking agent, initiator and solvent into a reaction kettle equipped with a stirrer, a thermometer and a heater, react at 80°C for 12 hours under stirring to obtain a micro-cross-linked gel, and then add the film substrate to the In the micro-cross-linked gel, stir at 80°C until the membrane substrate and the micro-cross-linked gel are evenly mixed, then filter to remove solid impurities, put it in a vacuum drying oven, vacuumize at room temperature to ...

Embodiment 2

[0043] (1) Preparation of spinning solution

[0044] Using methacryloyloxyethyltrimethylammonium chloride (METAC) and poly(ethylene glycol) methyl ether methacrylate (P(EG)MEMA) as reaction monomers, measure 14 kg of polysulfone as the membrane substrate, METAC 3kg, P(EG)MEMA 3kg, solvent N-methylpyrrolidone 85kg, the cross-linking agent ethylene glycol dimethacrylate of 2% of the total molar weight of the reactive monomers and the initiator of the total weight of the reactive monomers 1%. Dibenzoyl oxide;

[0045] Add the reaction monomer, cross-linking agent, initiator and solvent into a reaction kettle equipped with a stirrer, a thermometer and a heater, react at 80°C for 12 hours under stirring to obtain a micro-cross-linked gel, and then add the film substrate to the In the micro-cross-linked gel, stir at 80°C until the membrane substrate and the micro-cross-linked gel are evenly mixed, then filter to remove solid impurities, put it in a vacuum drying oven, vacuumize at ...

Embodiment 3

[0051] (1) Preparation of spinning solution

[0052] Using methacryloxyethyltrimethylammonium chloride (METAC) and poly(ethylene glycol) methyl ether methacrylate (P(EG)MEMA) as reaction monomers, measure 20 kg of polysulfone as the membrane substrate, METAC 1kg, P(EG)MEMA 5kg, solvent dimethyl sulfoxide 80kg, the cross-linking agent ethylene glycol dimethacrylate of 0.5% of the total molar weight of the reactive monomers and the initiator of the total weight of the reactive monomers 4%. Dibenzoyl oxide;

[0053] Add the reaction monomer, cross-linking agent, initiator and solvent into a reaction kettle equipped with a stirrer, a thermometer and a heater, react at 80°C for 24 hours under stirring to obtain a micro-cross-linked gel, and then add the film substrate to the In the micro-cross-linked gel, stir at 80°C until the membrane substrate and the micro-cross-linked gel are evenly mixed, then filter to remove solid impurities, put it in a vacuum drying oven, vacuumize at ro...

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Abstract

The invention provides a preparation method for a hollow fiber ultrafiltration membrane with antibacterial and antipollution functions. The method comprises the following steps: (1) subjecting a reaction monomer, a crosslinking agent, an initiator and a solvent to mixing, carrying out reaction under stirring at 70 to 95 DEG C for 10 to 24 hours so as to obtain a crosslinking microgel, then adding a membrane substrate and carrying out stirring until the membrane substrate and the crosslinking microgel are uniformly mixed, and carrying out filtering, defoaming, standing and curing so as to obtain spinning liquid; and (2) extruding the spinning liquid out from a spinning nozzle composed of two concentric tubes, allowing 8 to 40 cm of the extruded spinning liquid to be in air and then entering water bath for consolidation forming so as to obtain the hollow fiber ultrafiltration membrane, and carrying out draw twisting and then carrying out soaking in water so as to remove impurities. The hollow fiber ultrafiltration membrane prepared by using the above-mentioned method has an inner diameter of 200 to 1000 [mu]m, a membrane wall thickness of 50 to 200 [mu]m, a membrane wall pore diameter of 0.005 to 0.4 [mu]m and a pure water ultrafiltration coefficient of 120 to 600 mL / m2.h.mmHg, and has good antibacterial and antipollution abilities at the same time.

Description

technical field [0001] The invention belongs to the field of hollow fiber ultrafiltration membranes, in particular to a hollow fiber ultrafiltration membrane with antibacterial and anti-pollution functions and a preparation method thereof. Background technique [0002] Water pollution has become a global problem. According to statistics, there are currently more than 1.2 billion people in the world who cannot obtain safe drinking water, and 2.6 billion people lack or even have no tools to obtain clean water. Every year, millions of people suffer from water pollution. Death from diseases caused by the disease (Nature, 452, 301-310 (2008); Environmental Science and Technology, 41, 17–24 (2007)). Getting people to use clean, safe and cheap drinking water is still a worldwide problem. At present, harmful pathogens such as bacteria, fungi, viruses, and prions in drinking water are mainly eliminated by ultraviolet irradiation, external chlorine or chlorine dioxide and other bacte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D69/08B01D69/02B01D67/00
Inventor 赵长生聂川雄程冲何超邓杰
Owner SICHUAN UNIV
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