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Preparation method of block copolymer nanoporous membrane containing cyclodextrin chain segments and having temperature responsiveness

A block copolymer and temperature-responsive technology, which is applied in the field of preparation of block copolymer nanoporous membranes, can solve the problems of complex processing procedures, low degree of membrane functionalization, poor controllability of molecular structure, etc., so as to improve the selectivity. Effect

Inactive Publication Date: 2016-03-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing a block copolymer nanoporous membrane containing cyclodextrin chain segments and having temperature responsiveness, which overcomes the processing procedure existing in the existing nanoporous membrane preparation technology Complexity, low degree of membrane functionalization, and poor controllability of molecular structure

Method used

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  • Preparation method of block copolymer nanoporous membrane containing cyclodextrin chain segments and having temperature responsiveness
  • Preparation method of block copolymer nanoporous membrane containing cyclodextrin chain segments and having temperature responsiveness

Examples

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Embodiment 1

[0050] Potassium phosphate (2 g, 9.43 mmol) and 16 mL of acetone were added to a dry one-necked flask, and magnetically stirred for 8 h to fully dissolve it. Mercaptopropionic acid (1g, 9.43mmol) was added dropwise to the above-mentioned flask, continued magnetic stirring for 2h, and carbon disulfide (2.15g, 28.3mmol) was added dropwise in the above-mentioned flask, and benzyl bromide (1.61g, 9.43mmol) was added and the stirring reaction was continued for 2h. After the reaction was completed, saturated saline and diethyl ether were sequentially added into the single-necked flask for extraction and washing, and the resulting diethyl ether layer was collected and distilled under reduced pressure to obtain a yellow liquid. Add an equal amount of saturated saline and diethyl ether to the yellow liquid for secondary extraction and washing, collect the final organic layer, add anhydrous sodium sulfate twice the volume of the product to it, stir magnetically for 2 hours, and filter i...

Embodiment 2

[0058]Potassium phosphate (4 g, 18.86 mmol) and 30 mL of acetone were added to a dry one-necked flask, and magnetically stirred for 10 h. Mercaptopropionic acid (2g, 18.86mmol) was added dropwise in the above-mentioned flask, continued magnetic stirring for 2h, carbon disulfide (4.3g, 56.6mmol) was added dropwise in the above-mentioned flask and continued to stir for 2h, and then benzyl bromide (3.22g , 18.86mmol) was added and stirring was continued for 2h. After the reaction was completed, saturated saline and diethyl ether were sequentially added into the single-necked flask for extraction and washing, and the resulting diethyl ether layer was collected and distilled under reduced pressure to obtain a yellow liquid. Extract and wash again with saturated saline and ether, collect the final organic layer, add anhydrous sodium sulfate twice the volume of the product to it, stir magnetically for 2 hours, filter with a G4 sand core funnel to remove anhydrous sodium sulfate, and ...

Embodiment 3

[0065] Potassium phosphate (6 g, 28.29 mmol) and 46 mL of acetone were added to a dry one-necked flask and magnetically stirred for 12 h. Mercaptopropionic acid (3g, 28.29mmol) was added dropwise in the above-mentioned flask, and carbon disulfide (6.45g, 84.9mmol) was added dropwise in the above-mentioned flask after continuing to stir for 2h, and then benzyl bromide (4.83g , 28.29mmol) was added and the stirring reaction was continued for 2h. After the reaction was completed, saturated saline and diethyl ether were sequentially added into the single-necked flask for extraction and washing, and the resulting diethyl ether layer was collected and distilled under reduced pressure to obtain a yellow liquid. Extract and wash again with saturated brine and ether, collect the final organic layer, add anhydrous sodium sulfate twice the volume of the product to it, stir magnetically for 2 hours, filter with a G4 sand core funnel to remove anhydrous sodium sulfate, and distill under re...

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Abstract

The invention provides a preparation method of a segmented copolymer nanopore film containing cyclodextrin chains and simultaneously having temperature responsiveness. According to the method, firstly, polystyrene-b-poly(N-isopropylacrylamide-co-single vinyl-ethidene amination Beta-cyclodextrin) with narrow molecular weight distribution and controllable molecular weight sizes is prepared by utilizing a reversible addition-fragmentation chain transfer (RAFT) polymerization method so as to provide an effective premise for subsequent film preparation; the nanopore film has the temperature-sensitive characteristic because of containing poly(N-isopropylacrylamide) chain segments, i.e., the structure of the intelligent film is reversibly changed according to the changes of external stimulation, so that the film properties such as the size of pore diameter, the hydrophilcity and the hydrophobicity are changed. Thus, the flux of the film is controlled and the selectivity of the film is improved. Meanwhile, based on the existence of Beta-CD chain segments, the second type of space for encapsulating medicines and the molecular recognition for a porous film material except nanopores are improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a preparation method of a block copolymer nanoporous membrane containing cyclodextrin chain segments and having temperature responsiveness. Background technique [0002] Block copolymer nanoporous membrane is a highly ordered microphase structure material, which contains a large number of nanohole arrays, which can be used in the growth of one-dimensional nanostructures, the preparation of metal or semiconductor ordered templates, water purification and selection. Sexual separation and other fields have important application potential. The stimuli-responsive block copolymer nanoporous membrane is a special kind of this kind of membrane. It is characterized in that the micropores of the membrane can be reversibly changed in response to changes in the surrounding environment, resulting in membrane properties such as pore size, hydrophilicity and hydrophobicity. etc., so as to contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08J5/18C08F293/00C08B37/16
Inventor 田威党静张卫红齐文静
Owner NORTHWESTERN POLYTECHNICAL UNIV
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