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Amphiphilic block copolymer with light and temperature responsivenesses and preparation method thereof

An amphiphilic block and copolymer technology, applied in the field of amphiphilic block copolymer and its preparation, can solve problems such as limited application

Inactive Publication Date: 2012-11-14
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, light itself is a non-contact clean energy, which has the advantages of remote orientation and control, which cannot be replaced by other forms of stimulation. Therefore, light-responsive aggregates have broad application prospects, and the development of light-responsive Aggregate materials with specific characteristics are very important, but a single photoresponsive material may have many limitations, which will be constrained by the environment and related conditions, thus limiting its application

Method used

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  • Amphiphilic block copolymer with light and temperature responsivenesses and preparation method thereof
  • Amphiphilic block copolymer with light and temperature responsivenesses and preparation method thereof
  • Amphiphilic block copolymer with light and temperature responsivenesses and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Synthesize 6-(4-(4-ethoxyphenyl)azophenoxy)hexyl methacrylate (MeA6AB2) monomer containing photoresponsive groups (refer to patent CN 101434684 for the synthesis method).

[0047] First, 1.2 g of 4-ethoxy-4'-(6-hydroxyhexyloxy) azobenzene, 50 mL of TEA, and 150 mL of tetrahydrofuran (THF) were successively added to the three-necked flask, and methyl 3 mL of acryloyl chloride was reacted at room temperature for 4 h, separated and purified to obtain pure 6-(4-(4-ethoxyphenyl)azophenoxy)hexyl methacrylate.

Embodiment 2

[0049] Synthetic macromolecular initiator (refer to patent CN 101434684 for the synthesis method).

[0050] 10 g of polyethylene glycol monomethyl ether (number average molecular weight: 2000), 100 mL of dichloromethane and 10 mL of triethylamine (TEA) were successively added into the three-neck flask, and cooled in an ice-water bath. Mix 3.2g of dimethylaminopyridine and 5mL of 2-methyl-2-bromopropionyl bromide, dissolve and dilute it with 5mL of dichloromethane, then slowly add it dropwise to the above solution, and react at room temperature for 4h. After separation and purification, the pure product of polyethylene glycol monomethyl ether macromolecular initiator (PEO-Br) with brominated end groups is obtained.

Embodiment 3

[0052] Synthesis of amphiphilic block copolymers.

[0053] In the 25mL polymerization tube, add the PEO-Br macroinitiator synthesized in 200mg embodiment 2, the MeA6AB2 monomer synthesized in 50mg embodiment 1, 50mg N-isopropylacrylamide (NIPAM) monomer, 2mg CuCl And 5 μL of tris(N,N-dimethylaminoethyl)amine, 10 mL of 1,4-dioxane, after three cycles of "freeze-pump-thaw", seal the tube. Reaction in an oil bath at 55°C for 10h. The number average molecular weight measured by gel permeation chromatography is 1.6×10 4 , the polydispersity coefficient is 1.12.

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Abstract

The invention belongs to the field of organic functional polymer materials, and relates to an amphiphilic block copolymer with a light responsiveness group and a temperature responsiveness group as well as a preparation method and application thereof in forming stimulus-response aggregates in solution. The amphiphilic block copolymer is prepared by using the method of atom transfer radical polymerization (ATRP), and can be used for forming nanoscale aggregate materials in solution. The nanoscale aggregate materials are characterized in that the sizes of the aggregates are in nanoscale, and the aggregates are distributed uniformly and can be adjusted and controlled through light and temperature; and the controllable release of substances coated with the materials can be realized under the control of light, or temperature, or light and temperature. The nanoscale controllable release carrier material provided in the invention can widely be applied to the fields such as biomedical science, chemical catalysis and synthesis, sensor technology, and the like.

Description

technical field [0001] The invention belongs to the field of organic functional polymer materials, and specifically relates to an amphiphilic block copolymer containing light-responsive and temperature-responsive groups, a preparation method thereof, and an application thereof to form stimuli-responsive aggregates in a solution. Background technique [0002] Amphiphilic block copolymers have received more and more attention in this field because of their scientific research value and potential wide application. The polymer is generally composed of hydrophilic macromolecular segments and hydrophobic macromolecular segments linked by chemical bonds. This kind of polymer has controllable structure and special properties, and can form highly regular microstructures through self-assembly, for example, aggregates such as micelles, vesicles and microspheres can be formed in selective solution systems; the research has published in Based on the phase separation and macroscopic mass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F220/36C08F220/54C08J3/07C08L53/00
Inventor 俞燕蕾冯泽林里颜曾
Owner FUDAN UNIV