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Environment response polymer brush and preparation method thereof

An environment-responsive, copolymer technology, which is applied to a pH-responsive copolymer brush and its preparation, has temperature, environment-responsive copolymer brushes and the field of preparation thereof, and can solve the problem of not being able to obtain temperature-responsive copolymers, functional Can not meet the problems such as well, to achieve the effect of simple synthesis method and rich source of raw materials

Inactive Publication Date: 2008-08-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if polyisopropylacrylamide is copolymerized with organic acids to adjust its response temperature, a copolymer with temperature response between pH=5-8 cannot be obtained, and a single function cannot well meet the diversification of today's world requirements

Method used

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  • Environment response polymer brush and preparation method thereof
  • Environment response polymer brush and preparation method thereof
  • Environment response polymer brush and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (a) Dissolve 35.5 g of monoamino-terminated PEO with a molecular weight of 1000 in 50 ml of chloroform, transfer the solution to a 250 ml three-neck flask with stirring, and then add 7.2 g of triethylamine. At 0°C, pass N 2 For protection, add 7.4 g of methacryloyl chloride in 20 ml of chloroform solution dropwise, control the rate of addition, and drop it within 1 hour. The reaction was continued at 0°C for 1 hour, and then the system was warmed up to room temperature for another 8 hours. After the reaction, filter the reaction solution to remove triethylamine hydrochloride, pour the filtrate into 500ml of n-hexane, stir at room temperature for 5 hours, filter and wash the precipitate with ether, and vacuum dry at 40°C for 24 hours to obtain macromolecular single Bulk methacrylamide-terminated polyoxyethylene (PEO-MA).

[0024] (b) 0.0046g of azobisisobutylcyanide (AIBN), 2.20g of PEO-MA and 0.84g of vinylpyridine were dissolved in isopropanol and reacted at 60°C for...

Embodiment 2

[0028] (a) Dissolve 11.5 g of monoamino-terminated PEO with a molecular weight of 1000 in 20 ml of chloroform, transfer the solution to a 250 ml three-neck flask with stirring, and then add 2.8 g of triethylamine. At 0°C, pass N 2 For protection, add 2.9 g of methacryloyl chloride in 10 ml of chloroform solution dropwise, control the rate of addition, and drop it within 1 hour. The reaction was continued at 0° C. for 1 hour, and then the system was warmed to room temperature for another 15 hours. After the reaction is over, filter the reaction solution to remove triethylamine hydrochloride, pour the filtrate into 300ml of n-hexane, stir at room temperature for 5 hours, filter and wash the precipitate with ether, and dry it in vacuum at 40°C for 24 hours to obtain macromolecular single Bulk methacrylamide-terminated polyoxyethylene (PEO-MA).

[0029] (b) 0.0049g of azobisisobutylcyanide (AIBN), 1.47g of PEO-MA and 0.84g of vinylpyridine were dissolved in isopropanol and react...

Embodiment 3

[0031] (a) Dissolve 35.5 g of monoamino-terminated PEO with a molecular weight of 1000 in 60 ml of chloroform, transfer the solution to a 250 ml three-neck flask with stirring, and then add 7.9 g of triethylamine. At 0°C, pass N 2 For protection, add 8.2 g of methacryloyl chloride in 20 ml of chloroform solution dropwise, control the rate of addition, and drop it within 1 hour. The reaction was continued at 0°C for 1 hour, and then the system was warmed up to room temperature for another 8 hours. After the reaction, filter the reaction solution to remove triethylamine hydrochloride, pour the filtrate into 500ml of n-hexane, stir at room temperature for 5 hours, filter and wash the precipitate with ether, and vacuum dry at 40°C for 24 hours to obtain macromolecular single Bulk methacrylamide-terminated polyoxyethylene (PEO-MA).

[0032] (b) 0.0044g of azobisisobutylcyanide (AIBN), 1.10g of PEO-MA and 0.84g of vinylpyridine were dissolved in isopropanol and reacted at 60°C for...

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Abstract

The invention relates to an environment responsive copolymer brush and a corresponding preparation method, wherein the copolymer is prepared by acid, alkali monomers and polyoxyethylene macromolecule monomer via traditional free radical copolymerization, the macromolecule monomer is polyoxyethylene with single terminated olefin, which is synthesized from polyoxyethylene with single terminated functional group and acroleic acid acyl chloride, with high conversion rate. The copolymer brush has simple synthesis, and available rich raw material resource which water solution has response character on temperature and pH value. Via adjusting the ratios of acid, alkali monomers and polyoxyethylene macromolecule monomer, the low critical dissolution temperature and pH value response range of the copolymer water solution can be changed. The invention can be used to separate drug carrier and metal particles and modify material surface or the like.

Description

technical field [0001] The invention relates to a class of environment-responsive copolymer brushes and a preparation method thereof, in particular to a class of copolymer brushes with response characteristics to temperature and pH value and a preparation method thereof. The invention belongs to the technical field of environment-responsive polymer material preparation. Background technique [0002] Environment-responsive polymers are a class of polymers that can respond to subtle changes (stimuli) in the external environment, resulting in corresponding changes in physical structure and chemical properties or even mutations. External stimuli can be temperature, pH, ionic strength ( Electrolyte), electric field, light, etc. Environmentally responsive polymers have a wide range of applications, such as sensors, actuators, smart switches, drivers, displays, optical communications, drug carriers, biocatalysis, immobilized enzymes, material extraction, cell culture, smart cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F226/06C08G65/332C08F220/58C08F220/28
Inventor 任艳蓉姜学松印杰
Owner SHANGHAI JIAO TONG UNIV
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