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Composite ultrafiltration membrane of modified chitosan composite electrostatic spinning nanofiber and preparation method of composite ultrafiltration membrane

An electrospinning and nanofiber technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor weather resistance, pollution resistance, and low water flux of water treatment membranes, and achieve pore The effect of uniform structure, high water flux and high porosity

Inactive Publication Date: 2015-01-21
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of low water flux, non-pollution resistance and poor weather resistance of existing water treatment membranes, and provide a modified chitosan composite electrospun nanofiber with high filtration efficiency and stable chemical properties Ultrafiltration membrane with multi-layer composite structure

Method used

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  • Composite ultrafiltration membrane of modified chitosan composite electrostatic spinning nanofiber and preparation method of composite ultrafiltration membrane
  • Composite ultrafiltration membrane of modified chitosan composite electrostatic spinning nanofiber and preparation method of composite ultrafiltration membrane
  • Composite ultrafiltration membrane of modified chitosan composite electrostatic spinning nanofiber and preparation method of composite ultrafiltration membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0053] (1) Dissolve polyvinylidene fluoride in a mixed solvent of N,N-dimethylformamide and acetone at 50°C, the ratio of the mixed solvent is DMF / Acetone=5 / 5, stir at constant temperature for 8 hours to make them Mix evenly to obtain a polyvinylidene fluoride electrospinning solution; the volume concentration of the polyvinylidene fluoride in the polyvinylidene fluoride electrospinning solution is 150 mg / mL;

[0054] (2) Put the polyvinylidene fluoride electrospinning solution prepared in step (1) into the liquid storage device of the electrospinning equipment under a constant temperature environment with a temperature of 50° C., the piston of the liquid storage device is connected to the syringe pump, The liquid storage device is connected to the metal (stainless steel) spinneret of the electrospinning equipment through the polytetrafluoroethylene infusion tube, and the metal spinneret is connected to the high-voltage generating device; A grounded metal (stainless steel) fla...

Embodiment 2

[0063] (1) Dissolve polyacrylonitrile in a mixed solvent of N,N-dimethylformamide and acetone at 50°C, the ratio of the mixed solvent is DMF / Acetone=5 / 5, stir at constant temperature for 8 hours to mix them Uniformly, a polyacrylonitrile electrospinning solution is obtained; the volume concentration of the polyacrylonitrile in the polyacrylonitrile electrospinning solution is 180mg / mL;

[0064] (2) Put the polyacrylonitrile electrospinning solution prepared in step (1) into the liquid storage device of the electrospinning equipment under a constant temperature environment with a temperature of 50° C., and the piston of the liquid storage device is connected with the syringe pump. The liquid storage device is connected to the metal (stainless steel) spinneret of the electrospinning equipment through the polytetrafluoroethylene infusion tube, and the metal spinneret is connected to the high-voltage generating device; the bottom of the metal spinneret is arranged There is a groun...

Embodiment 3

[0073] (1) Dissolve polyvinylidene fluoride in a mixed solvent of N,N-dimethylformamide and acetone at 50°C, the ratio of the mixed solvent is DMF / Acetone=5 / 5, stir at constant temperature for 8 hours to make them Mix evenly to obtain a polyvinylidene fluoride electrospinning solution; the volume concentration of the polyvinylidene fluoride in the polyvinylidene fluoride electrospinning solution is 150 mg / mL;

[0074] (2) Put the polyvinylidene fluoride electrospinning solution prepared in step (1) into the liquid storage device of the electrospinning equipment under a constant temperature environment with a temperature of 50° C., the piston of the liquid storage device is connected to the syringe pump, The liquid storage device is connected to the metal (stainless steel) spinneret of the electrospinning equipment through the polytetrafluoroethylene infusion tube, and the metal spinneret is connected to the high-voltage generating device; A grounded metal (stainless steel) fla...

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Abstract

The invention relates to a composite ultrafiltration membrane of a modified chitosan composite electrostatic spinning nanofiber. The composite ultrafiltration membrane is structurally characterized in that a non-woven fabric supporting layer substrate is sequentially provided with a membrane layer which has excellent chemical resistance and ageing resistance, and is composed of polymer electrostatic spinning nanofiber and prepared by using an electrostatic spinning method; and the surface of the membrane layer is an ultrathin modified chitosan separation layer which has high water permeability and stable chemical property, and is formed after a high-hydrophilcity ultrathin chitosan layer coated on the surface of the membrane layer composed of the polymer electrostatic spinning nanofiber by using aldehyde and acyl chloride modifiers is subjected to crosslinking modification. The multi-layer composite ultrafiltration membrane provided by the invention has the characteristics of high water flux, high interception efficiency, low pollution, resistance to acid and base and the like. The filtration membrane can be used for producing domestic water, drinking water and water used under special conditions and is suitable for the fields such as medicines, bioengineering, foods, environment friendliness and the like.

Description

technical field [0001] The invention relates to a composite ultrafiltration membrane of modified chitosan composite electrospun nanofibers, in particular to an electrospun nanofiber layer, an ultrathin layer of chitosan and an effective cross-linking modification to the ultrathin layer of chitosan A composite ultrafiltration membrane, and a preparation method of the composite ultrafiltration membrane. Background technique [0002] In the world, with the rapid development of industries in various countries, the population continues to increase, the demand for water resources is increasing, and the pollution of water resources is becoming more and more serious. Global fresh water resources, especially potable fresh water resources, are becoming increasingly scarce. The supply of clean and healthy drinking water is seriously threatened, so it is more and more important for the sustainable development of water purification and recycling. Taking my country as an example, among t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D71/06B01D71/08B01D67/00
Inventor 赵志国郑建芬张海源韩志超
Owner INST OF CHEM CHINESE ACAD OF SCI
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