Method for preparing polymer micro-filter membrane

A technology of microfiltration membrane and polymer, applied in the field of preparation of polymer microfiltration membrane, can solve the problems of difficult processing, difficult to recycle, unable to satisfy hydrophilicity, chemical solvent resistance and temperature resistance at the same time, and achieve repeatability. Good, simple molding, mild preparation conditions

Inactive Publication Date: 2008-10-01
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixed solvent is difficult to recycle after the polymer film is formed, and it is difficult to handle
In addition to the deficiencies in the film-making process, these polymer materials often cannot meet the requirements of physical and chemical properties such as hydrophilicity, chemical solvent resistance, and temperature resistance at the same time.

Method used

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  • Method for preparing polymer micro-filter membrane
  • Method for preparing polymer micro-filter membrane
  • Method for preparing polymer micro-filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 6 grams of epoxy resin and 1.5 grams of diethylenetriamine in 15 grams of polyethylene glycol 1000 medium to obtain a clear solution, remove air bubbles, then cast the solution on a stainless steel plate, let it stand, and keep it warm at 50 ° C for 5 hours , the initial solution undergoes phase separation, and the gel solidifies into a white epoxy resin nascent membrane. Finally, the nascent membrane is immersed in water to remove the medium polyethylene glycol to obtain a microfiltration membrane. The membrane thickness is 120 μm, and the average pore size and water flux are shown in Table 1.

Embodiment 2～5

[0030] Fix the weight of epoxy resin and diethylenetriamine constant, change the weight ratio of polyethylene glycol 1000 and epoxy resin, the rest of the conditions and operations are the same as in Example 1, and the corresponding microfiltration membranes are prepared, the average pore size and water flow rate are the same. The amount is shown in Table 1.

[0031] Table 1:

[0032]

Embodiment 6

[0034] The weight of fixed epoxy resin is 6 grams, the weight of Polyethylene Glycol 1000 is 18 grams, uses triethylenetetramine instead, and the weight of amine is 2 grams, all the other conditions and operation are identical with embodiment 1, obtain microfiltration membrane, The average pore size and water flux are shown in Table 2.

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Abstract

The invention relates to a preparation method of an epoxy resin-based micro-filtration film. Firstly, under a certain temperature, the epoxy resin and amines such as diethylene triamine or triethylenetetramine is completely dissolved in polyethyleneglycol medium by a certain weight ratio, and the air bubble is then removed; the solution is cast or flow-cast on supporting material such as metal or plastic tape, and suitable temperature is kept. After a certain time, monomer solution generates polymerization and phase separation at the same time; gel is solidified as white epoxy resin-based nascent state film; the nascent state film is finally dipped in water, and the medium polyethyleneglycol is removed to obtain the micro-filtration film. Other organic solvents are not required to be added in the preparation process, with green environmental protection. The prepared micro-filtration film has good mechanical strength, uniform distribution of aperture, adjustable size, strong hydrophilicity, acid resistance, alkali resistance and solvent resistance; furthermore, the structure of the film is not damaged by high-temperature germicidal treatment under the temperature of 120 DEG C; the film has excellent performance and the method of the invention can be widely applied to the separation and filtration in the industries such as instrument analysis, water disposal and biological medicine, etc.

Description

technical field [0001] The invention relates to a preparation method of a polymer microfiltration membrane, in particular to a preparation method of an epoxy resin-based microfiltration membrane. Background technique [0002] Microfiltration membranes are mainly used to intercept particles, bacteria and other pollutants from the gas and liquid phases to achieve the purpose of purification, separation and concentration. Due to the characteristics of high efficiency, energy saving, environmental protection, absolute filtration and simple filtration process and easy control of microfiltration membrane separation technology, it has been widely used in the pharmaceutical industry, food industry (gelatin, wine, liquor, fruit juice, milk, etc.), high-purity water, urban sewage , industrial wastewater, drinking water, biotechnology, biological fermentation and other fields have produced huge economic and social benefits, and have become one of the most important means in today's sep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/46B01D67/00
Inventor 肖通虎
Owner NINGBO UNIV
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