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Protein-fouling-resistant zwitter-ion ultrafiltration membrane and preparation method thereof

A zwitterion, ultrafiltration membrane technology, applied in the field of membrane separation, can solve the problems of inability to meet ultrafiltration requirements, decrease in membrane hydrophilicity, poor antifouling selectivity, etc., and achieve easy scale, good thermal stability, and use long life effect

Active Publication Date: 2016-07-06
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the water resistance of polyvinyl alcohol film can be improved after chitosan and polyvinyl alcohol are blended, it is found that the hydrophilicity of the film decreases after repeating the test, and the pure water flux is less than 50L m -2 h -1 , poor hydrophilicity, poor anti-fouling properties, and poor anti-fouling selectivity, which cannot meet the actual ultrafiltration needs and seriously affect its service life as a whole

Method used

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  • Protein-fouling-resistant zwitter-ion ultrafiltration membrane and preparation method thereof
  • Protein-fouling-resistant zwitter-ion ultrafiltration membrane and preparation method thereof
  • Protein-fouling-resistant zwitter-ion ultrafiltration membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038]1. Preparation of imidized chitosan: prepare a 2% chitosan solution with a mass concentration of 2% acetic acid solution, and stir at 60°C for 60 minutes. The prepared solution contains 2g chitosan Take by weighing 4g p-dimethylaminobenzaldehyde and be dissolved in the dehydrated alcohol of 70mL and be configured into the ethanol solution of p-dimethylaminobenzaldehyde; After the two kinds of solutions that are configured are mixed, adjust the pH value with the hydrochloric acid solution of 1mol / L about 3, stirred and reacted at room temperature for 6 hours, then added 3mL, 2mol / L sodium hydroxide solution to the reaction solution to adjust the pH value of the reaction solution to about 5, then added 80μL, 0.63mol / L hydroboration solution to the reaction solution Sodium solution for reduction reaction, after the reaction is complete, quickly add 15mL, 3mol / L sodium hydroxide solution to precipitate a precipitate, collect the precipitate, wash with acetone and ethanol thre...

Embodiment 2-5

[0047] By the same steps of Example 1, change the proportion of the amphoteric ionization chitosan component in the solution, other steps are the same as in Example 1, prepare ultrafiltration membrane and its water absorption, porosity, exchange capacity Carried out the test, and the test results are shown in Table 1:

[0048] Table 1: Performance test data of ultrafiltration membranes prepared in Examples 2 to 5

[0049]

[0050] Table 1 is the corresponding data of the amphoteric ion chitosan ultrafiltration membrane of the different content that makes in the present embodiment 2~5, can find out, along with the increase of amphoteric ion chitosan content, its porosity, water absorption The volume and exchange capacity increase accordingly.

[0051] Figure 5 For the different content zwitterionic chitosan ultrafiltration membranes prepared in Examples 2~5 (Z-0, Z-1, Z-2, Z-4 represent that the consumption ratio of zwitterionic polysaccharide is respectively 0%, 10%, 20...

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Abstract

The invention discloses a protein-fouling-resistant zwitter-ion ultrafiltration membrane and a preparation method thereof. The zwitter-ion ultrafiltration membrane is prepared by coating gel, prepared through sol-gel reaction of zwitterionization chitosan and polyvinyl alcohol, on a supporter to form a membrane, and soaking the membrane into water for phase conversion reaction. The zwitter-ion ultrafiltration membrane prepared from the polyvinyl alcohol modified by the zwitterionization chitosan is highly resistant to water, remarkable in hydrophilicity and antifouling performance and good in antifouling selectivity and particularly achieves the ratio of removing bovine serum albumin up to 97.6%; the zwitter-ion ultrafiltration membrane capable of achieving targeted protein fouling resistance can maintain high membrane flux and high bovine serum albumin removal rate through multiple experiments and is long in service life; additionally, the zwitter-ion ultrafiltration membrane is simple in preparation technology, highly repeatable and easy to achieve scale production, requires no strict control over reaction conditions and the like.

Description

technical field [0001] The invention relates to an ultrafiltration membrane and a preparation method thereof, in particular to an anti-protein pollution zwitterionic ultrafiltration membrane and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] Ultrafiltration refers to the process of separating under the promotion of static pressure difference and using membrane as the separation medium according to the molecular weight difference of the separated substances. The main separation objects of ultrafiltration membrane are proteins, various enzymes, bacteria, viruses, latex, etc. As a new type of separation technology, ultrafiltration has some obvious advantages: relatively simple process, continuous operation, good economy, large separation coefficient, energy saving and high efficiency. At present, ultrafiltration technology has been widely used in water treatment, medicine, biochemical technology and other fie...

Claims

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Application Information

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IPC IPC(8): B01D71/38B01D61/14B01D67/00
CPCB01D61/14B01D67/0002B01D71/38B01D71/74B01D2323/30B01D2325/36
Inventor 高志方刘关陈真真翟晶焕陆杰
Owner SHANGHAI UNIV OF ENG SCI
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