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Method for preparing vesicle with amine reaction functional groups and application of vesicle

A technology of reactive functional groups and vesicles, applied in chemical instruments and methods, reverse osmosis, membrane technology, etc., can solve problems such as rupture, displacement, deformation, etc., to prolong service life, reduce displacement, and prevent water channel protein capsules The effect of bubble displacement

Inactive Publication Date: 2018-01-23
宁波日新恒力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the reverse osmosis membrane needs to exert a large pressure during the osmosis process, the aquaporin vesicles are physically encapsulated only by the highly cross-linked structure inside the polyamide layer, and the encapsulated aquaporin vesicles are squeezed during the osmosis process. The risk of displacement, deformation, rupture, etc. will destroy the integrity of the aquaporin vesicle structure, and once it occurs, it will lead to the loss of the separation performance of the aquaporin reverse osmosis membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0039] Dissolve 0.1g of PS(367)-PEG(44)-PS(367) amphiphilic block copolymer in dichloromethane at 50°C, add a catalytic amount of SnCl 4 and 5-20wt% 1,4-dichloromethoxybutane, stirred and reacted for 6h, and terminated the reaction. Precipitate the copolymer with methanol, rinse it repeatedly with deionized water until there is no chloride ion in the copolymer, and dry it in vacuum at 60°C for 12 hours to obtain a PS-PEG-PS amphiphilic block with a chloromethylation degree of 10%-30%. copolymer.

[0040] Soak the above-mentioned PS-PEG-PS amphiphilic block copolymers with different degrees of chloromethylation in excess ethylenediamine at 25°C to make ethylenediamine and PS-PEG-PS amphiphilic block copolymers The nucleophilic substitution reaction of the chloromethyl group occurs, and the reaction time is 50-80min. The PS-PEG-PS amphiphilic block copolymer is taken out, soaked and washed with ethanol and distilled water repeatedly, and dried in vacuum to obtain ammoniated PS ...

Embodiment 6-10

[0047] Dissolve 0.1g of PS(367)-PEG(44)-PS(367) amphiphilic block copolymer in dichloromethane at 50°C, add a catalytic amount of SnCl 4 and 5-20wt% 1,4-dichloromethoxybutane, stirred and reacted for 6h, and terminated the reaction. Precipitate the copolymer with methanol, rinse it repeatedly with deionized water until there is no chloride ion in the copolymer, and dry it in vacuum at 60°C for 12 hours to obtain a PS-PEG-PS amphiphilic block with a chloromethylation degree of 10%-30%. copolymer.

[0048] Soak the above-mentioned PS-PEG-PS amphiphilic block copolymers with different degrees of chloromethylation in excess m-phenylenediamine at 25°C to make the m-phenylenediamine and PS-PEG-PS amphiphilic block The chloromethyl group of the copolymer undergoes a nucleophilic substitution reaction, and the reaction time is 80-120 minutes. Take out the PS-PEG-PS amphiphilic block copolymer, soak and wash it repeatedly with ethanol and distilled water, and dry it in vacuum to obtai...

Embodiment 11-15

[0055] Dissolve 0.1g of PS(367)-PEG(44) amphiphilic block copolymer in dichloromethane at 50°C, add a catalytic amount of SnCl 4 and 5-20wt% 1,4-dichloromethoxybutane, stirred and reacted for 6h, and terminated the reaction. Precipitate the copolymer with methanol, rinse it repeatedly with deionized water until there is no chloride ion in the copolymer, and dry it in vacuum at 60°C for 12 hours to obtain a PS-PEG amphiphilic block copolymer with a chloromethylation degree of 10%-30%. .

[0056] Soak the above-mentioned PS-PEG amphiphilic block copolymers with different degrees of chloromethylation in excess ethylenediamine at 25°C to make the chloromethyl groups of ethylenediamine and PS-PEG amphiphilic block copolymers A nucleophilic substitution reaction occurs, the reaction time is 50-80min, the PS-PEG amphiphilic block copolymer is taken out, soaked and washed with ethanol and distilled water repeatedly, and dried in vacuum to obtain ammoniated PS-PEG amphiphilic block co...

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Abstract

The invention discloses a vesicle with amine reaction functional groups. The vesicle comprises ABA or AB amphiphilic block copolymers and water channel proteins. The water channel proteins are embedded in the ABA or AB amphiphilic block copolymers, and the amine reaction functional groups capable of participating in polyamide interfacial polymerization reaction are grafted on the ABA or AB amphiphilic block copolymers. The invention further provides application of the vesicle with the amine reaction functional groups to preparing a reverse osmosis membrane. The vesicle and the application havethe advantages that amine graft modification is carried out on the vesicle with the water channel proteins, accordingly, the vesicle with the water channel proteins can participate in the polyamide interfacial polymerization reaction, not only can be packaged in hyper-cross-linked structures inside polyamide, but also can be connected with the hyper-cross-linked structures inside the polyamide bychemical bonds and is stable inside the reverse osmosis membrane, the problems of translocation, deformation, rupture and the like of existing vesicles with existing water channel proteins in osmosisprocedures can be solved, and the service life of the reverse osmosis membrane with the water channel proteins can be greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis membranes, in particular to a preparation method of vesicles containing amino reactive functional groups and its application in reverse osmosis membranes. Background technique [0002] At present, the preparation method of reverse osmosis membrane containing aquaporin is to first load aquaporin with vesicles as a carrier to obtain aquaporin vesicles, wherein the vesicles are phospholipid bilayers or ABA amphiphilic block copolymers or AB Amphiphilic block copolymer; then the aquaporin vesicles are physically encapsulated through the highly cross-linked structure inside the polyamide layer, and finally the aquaporin reverse osmosis membrane is obtained. Patent 201610096515.5 discloses the preparation method of the above-mentioned preparation of aquaporin composite reverse osmosis membrane. [0003] Since the reverse osmosis membrane needs to exert a large pressure during the osmosis proces...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D67/00B01D61/02
Inventor 不公告发明人
Owner 宁波日新恒力科技有限公司
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