Application of amphiphilic block copolymer and preparation method of degradable photonic crystal microspheres

A technology of photonic crystal microspheres and amphiphilic blocks, which is applied in the preparation of degradable photonic crystal microspheres and the application field of amphiphilic block copolymers, and can solve the problems of harsh preparation conditions, complicated operations, and many steps , to achieve the effect of simple preparation process, high safety performance and single color

Active Publication Date: 2021-09-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above preparation method has many steps, time-consuming, complicated operation and harsh preparation conditions, and will use corrosive solvents. In addition, in order to obtain a perfect ordered porous structure, it must be ensured that the voids of the opal structure can be filled evenly. A better photonic bandgap can be obtained only when the ratio reaches more than 80%.

Method used

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  • Application of amphiphilic block copolymer and preparation method of degradable photonic crystal microspheres
  • Application of amphiphilic block copolymer and preparation method of degradable photonic crystal microspheres
  • Application of amphiphilic block copolymer and preparation method of degradable photonic crystal microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] (1) Preparation of amphiphilic block copolymer brush PCL-b-PEO

[0078] Add caprolactone (ε-CL) and benzyl alcohol (BnOH) into toluene to dissolve, then add phosphazene base (P4-t-Bu) and react at room temperature for 40min to obtain a molecular weight of 1×10 4 g / mol polycaprolactone Bn-PCL terminated with a benzene ring; wherein, the molar ratio of benzyl alcohol to caprolactone is 1:9, and the molar ratio of catalyst to benzyl alcohol is 1:100.

[0079] The obtained Bn-PCL was esterified with norbornene (NB) at room temperature for 48 h to obtain norbornene-terminated polycaprolactone NB-PCL, and the catalyst for the esterification reaction was 4-dimethylaminopyridine (DMAP ), the dehydrating agent is dicyclohexylcarbodiimide (DCC), followed by precipitation with ice methanol for 3 times, and drying in a vacuum oven at 35°C for 12h;

[0080] The molecular weight is 8×10 4 g / mol polyethylene glycol monomethyl ether (PEO-CH 3 ) and norbornene acid (NB) were esterifi...

Embodiment 2

[0086] (1) Preparation of amphiphilic block copolymer brush PCL-b-PEO

[0087] Add caprolactone (ε-CL) and benzyl alcohol (BnOH) into toluene to dissolve, then add phosphazene base (P4-t-Bu) and react at room temperature for 40min to obtain a molecular weight of 8×10 4 g / mol polycaprolactone Bn-PCL terminated with a benzene ring; wherein, the molar ratio of benzyl alcohol to caprolactone is 1:10, and the molar ratio of catalyst to benzyl alcohol is 1:100.

[0088] The obtained Bn-PCL was esterified with norbornene (NB) at room temperature for 48 h to obtain norbornene-terminated polycaprolactone NB-PCL, and the catalyst for the esterification reaction was 4-dimethylaminopyridine (DMAP ), the dehydrating agent is dicyclohexylcarbodiimide (DCC), followed by precipitation with ice methanol for 3 times, and drying in a vacuum oven at 35°C for 12h;

[0089] The molecular weight is 7×10 4 g / mol polyethylene glycol monomethyl ether (PEO-CH 3 ) and norbornene acid (NB) were esterifie...

Embodiment 3

[0095] (1) Preparation of amphiphilic block copolymer brush PCL-b-PEO

[0096] Add caprolactone (ε-CL) and benzyl alcohol (BnOH) into toluene to dissolve, then add phosphazene base (P4-t-Bu) and react at room temperature for 40min to obtain a molecular weight of 5×10 4 g / mol polycaprolactone Bn-PCL terminated by a terminal benzene ring; wherein, the molar ratio of benzyl alcohol to caprolactone is 1:70, and the molar ratio of catalyst to benzyl alcohol is 1:100.

[0097] The obtained Bn-PCL was esterified with norbornene (NB) at room temperature for 48 h to obtain norbornene-terminated polycaprolactone NB-PCL, and the catalyst for the esterification reaction was 4-dimethylaminopyridine (DMAP ), the dehydrating agent is dicyclohexylcarbodiimide (DCC), followed by precipitation with ice methanol for 3 times, and drying in a vacuum oven at 35°C for 12h;

[0098] The molecular weight is 1×10 4 g / mol polyethylene glycol monomethyl ether (PEO-CH 3 ) and norbornene acid (NB) were ...

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Abstract

The invention discloses application of an amphiphilic block copolymer and a preparation method of degradable photonic crystal microspheres, and belongs to the technical field of polymer preparation. An amphiphilic block copolymer brush is an amphiphilic block copolymer brush PCL-b-PEO obtained through polymerization of polycaprolactone and polyethylene oxide or an amphiphilic block copolymer brush PLA-b-PEO obtained through polymerization of polylactic acid and polyethylene oxide, and the amphiphilic block copolymer brush can be used for preparing degradable photonic crystal microspheres. Meanwhile, the invention discloses a preparation method of degradable photonic crystal microspheres based on the amphiphilic block copolymer brush, the photonic crystal microspheres are prepared by a one-step method through self-assembly of the amphiphilic block copolymer brush in an oil-in-water emulsion, and compared with a traditional preparation method, the preparation method has the advantages that experimental conditions are simpler, more convenient and milder; high-temperature and high-precision treatment and use of strong corrosive substances are not needed, and the method has great application potential in the fields of cosmetics, toiletries and the like.

Description

technical field [0001] The invention relates to the technical field of polymer preparation, in particular to the application of an amphiphilic block copolymer and the preparation method of degradable photonic crystal microspheres. Background technique [0002] Photonic crystal microspheres, as a spherical form of structural color, have great application value because of the existence of internal photonic bandgap structures that can regulate the propagation route of light. Since the generation of structural color in photonic crystal microspheres relies on its own structure, it will not fade over time like ordinary pigments or pigments. At the same time, it has high brightness, high saturation, iridescence and Polarization effect and other characteristics, so it has been widely concerned by everyone. [0003] The bright and bright colors in traditional cosmetics come from the organic small molecule pigments contained in them. Although these organic small molecules have relati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08J3/07C08L87/00
CPCC08G81/00C08J3/07C08J2387/00
Inventor 宋东坡郭麒麟
Owner TIANJIN UNIV
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