Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Photo-responsive random copolymer and preparation method thereof

A random copolymer, photoresponsive technology, applied in the field of photoresponsive random copolymer and its preparation, to achieve the effect of simple preparation method, good polymerization controllability and high yield

Active Publication Date: 2016-05-25
XIAMEN UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is no report on the preparation of photoresponsive polymers containing azo chromophores by RAFT polymerization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photo-responsive random copolymer and preparation method thereof
  • Photo-responsive random copolymer and preparation method thereof
  • Photo-responsive random copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Synthesis of AzoMA monomer: Add 4-hydroxyazobenzene (1.9823g, 10mmoL), THF (50mL) and TEA (1.67mL, 12mmoL) into a 250mL round bottom flask equipped with a dropping funnel and a magnetic stir bar ), and magnetically stirred evenly to 0 °C under the condition of ice bath. Continue stirring in the ice bath, and slowly drop methacryloyl chloride (1.94 mL, 20 mmoL) dissolved in THF (40 mL) into the above mixed solution with a dropping funnel. React at room temperature for 15 hours, remove the generated triethylamine hydrochloride solid by filtration, collect the filtrate for rotary evaporation, dissolve the obtained solid in dichloromethane and place it in a separatory funnel, wash it with distilled water for 3 times, then add 5 g of anhydrous sulfuric acid Magnesium was dried and filtered, and the resultant dichloromethane solution was obtained by filtration. After the dichloromethane was removed by rotary evaporation, the crude product was obtained. The crude product w...

Embodiment 2

[0032] (1) Step (1) is the same as in Example 1.

[0033] (2) Synthesis of P(PEGMA-co-AzoMA): PEGMA (0.25g, 0.5mmoL), AzoMA (0.266g, 1mmoL), CDB (0.01361g, 0.05mmoL), AIBN (0.00164g, 0.01mmoL) and Add THF (2 mL) into a 25 mL Shlenk tube, freeze and thaw continuously for 3 to 5 times, then fill with argon protection, polymerize at 75°C for 40 h, and quench with liquid nitrogen to end the reaction. The reaction mixture was precipitated in 50 mL of n-hexane, washed and purified three times, filtered to remove unreacted AzoMA, the obtained crude product was dissolved in 2 mL of THF, and dialyzed in distilled water for 48 hours to remove unreacted PEGMA, and finally dark red viscous The yield of liquid P(PEGMA-co-AzoMA) is 63%, the values ​​of m and n are 4.0 and 8.0 respectively, and the average molecular weight is 4112.

Embodiment 3

[0035] (1) Step (1) is the same as in Example 1.

[0036](2) Synthesis of P(PEGMA-co-AzoMA): PEGMA (0.1g, 0.2mmoL), AzoMA (0.266g, 1mmoL), CDB (0.01361g, 0.05mmoL), AIBN (0.00164g, 0.01mmoL) and Add THF (2 mL) into a 25 mL Shlenk tube, freeze and thaw continuously for 3 to 5 times, and then fill with argon for protection. Polymerize at 75°C for 36 h, and quench with liquid nitrogen to end the reaction. The reaction mixture was precipitated in 50 mL of n-hexane, washed and purified three times, filtered to remove unreacted AzoMA, the obtained crude product was dissolved in 2 mL of THF, dialyzed in distilled water for 48 hours to remove unreacted PEGMA, and finally dark red viscous The yield of liquid P(PEGMA-co-AzoMA) is 60%, the values ​​of m and n are 1.6 and 8.0 respectively, and the average molecular weight is 2921.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a photo-responsive random copolymer and a preparation method thereof and relates to a random copolymer. The photo-responsive random copolymer is prepared by PEGMA and 4-oxyazobenzene-methacrylate. The preparation method comprises the steps that 4-hydroxyl azobenzene, TEA and THF are mixed to obtain a mixed solution A, cooling is performed to reach 0-5 DEG C, and methylacryloyl chloride dissolved in the THF is added to the mixed solution A; filtration is performed after reaction, the filtrate is collected and is dissolved in methylene chloride after rotary evaporation, anhydrous magnesium sulfate is added after washing for drying and filtering, the filtrate passes through a column after rotary evaporation to obtain a 4-oxyazobenzene-methacrylate monomer, then a PEGMA monomer, a CDB chain transfer agent, an initiator AIBN and the THF are added, and polymerization reaction is performed under argon gas protection and stirring after freezing, thawing and degassing and is terminated through liquid nitrogen quenching; the reaction mixture liquid is subjected to precipitation with n-hexane and dialysis with distilled water to obtain dark red viscous liquid, and suction filter is performed to obtain the photo-responsive random copolymer.

Description

technical field [0001] The invention relates to a random copolymer, in particular to a photoresponsive random copolymer and a preparation method thereof. Background technique [0002] Studies have shown that substances containing azo chromophores have good optical properties. Under the irradiation of ultraviolet or visible light, reversible cis-trans isomerization changes will occur immediately, and they have unique advantages in the fields of rewritable materials, image development and biological applications. Value. [0003] In order to study the functionality of azo chromophores, domestic and foreign scientific research groups generally key azo chromophores into polymers to form a polymer containing azo chromophores, thereby realizing its functional selection. For example, Yuan Weizhong et al. (a method for preparing a multi-responsive block copolymer containing azopyridine, Chinese patent, publication number: CN102633962A) finally synthesized a kind of azopyridine-conta...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/34C08F2/38A61K47/32
CPCA61K47/32C08F2/38C08F283/065C08F220/34
Inventor 罗伟昂项佳懿戴李宗袁丛辉刘诚陈婷陈国荣何凯斌许一婷曾碧榕刘新瑜
Owner XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com