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Multi-arm block type polycaprolactone color-changing polymer and preparation method thereof, and light-operated color-changing sponge and preparation method thereof

A technology of polycaprolactone and light-controlled discoloration, which is applied in the field of preparation of color-changing sponges, can solve the problems of easy elution of color-changing sponges, and achieve low energy consumption, strong penetrating ability, and rapid and stable isomerization Effect

Active Publication Date: 2022-01-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a multi-arm block type polycaprolactone color-changing polymer, light-controlled color-changing sponge and preparation method thereof, to solve the problem that the color-changing phase of the existing color-changing sponge is easily washed out

Method used

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  • Multi-arm block type polycaprolactone color-changing polymer and preparation method thereof, and light-operated color-changing sponge and preparation method thereof
  • Multi-arm block type polycaprolactone color-changing polymer and preparation method thereof, and light-operated color-changing sponge and preparation method thereof
  • Multi-arm block type polycaprolactone color-changing polymer and preparation method thereof, and light-operated color-changing sponge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of photochromic sponge, comprising the following steps:

[0038] (1) Preparation of three-arm polycaprolactone with phloroglucinol as the core molecule

[0039]

[0040] The reaction principle is as follows: with phloroglucinol as the core molecule and stannous octoate as the catalyst, three-arm star-shaped polycaprolactone was synthesized through controlled ring-opening polymerization. For effective initiation and homogeneous polymerization, DMF was used as solvent to dissolve phloroglucinol. All polymerizations were performed under strictly anhydrous conditions to avoid initiation by water. By changing the concentration or temperature of stannous octoate, three samples with different molecular weights were synthesized. The higher the catalyst concentration, the higher the temperature, the faster the polymerization rate, and the more complete the monomer conversion reaction.

[0041] The specific polymerization process is as follows: connect ...

Embodiment 2

[0057] A preparation method of photochromic sponge, comprising the following steps:

[0058] (1) Preparation of four-arm polycaprolactone with pentaerythritol as the core molecule

[0059]

[0060] The reaction principle is as follows, with pentaerythritol as the core molecule and stannous octoate as the catalyst, a four-armed star-shaped polycaprolactone was synthesized through controlled ring-opening polymerization. For effective initiation and homogeneous polymerization, DMF was used as solvent to dissolve pentaerythritol. All polymerizations were performed under strictly anhydrous conditions to avoid initiation by water. By changing the concentration or temperature of stannous octoate, three samples with different molecular weights were synthesized. The higher the catalyst concentration, the higher the temperature, the faster the polymerization rate, and the more complete the monomer conversion reaction.

[0061] The specific polymerization process is as follows: con...

Embodiment 3

[0077] A preparation method of photochromic sponge, comprising the following steps:

[0078] (1) Preparation of multi-armed polycaprolactone with β-cyclodextrin as the core molecule

[0079]

[0080] The reaction principle is as follows, with β-cyclodextrin as the core molecule and stannous octoate as the catalyst, the multi-armed star-shaped polycaprolactone was synthesized through controlled ring-opening polymerization. For effective initiation and homogeneous polymerization, DMF was used as solvent to dissolve β-cyclodextrin. All polymerizations were performed under strictly anhydrous conditions to avoid initiation by water. By changing the concentration or temperature of stannous octoate, three samples with different molecular weights were synthesized. The higher the catalyst concentration, the higher the temperature, the faster the polymerization rate, and the more complete the monomer conversion reaction.

[0081] The specific polymerization process is as follows: ...

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Abstract

The invention discloses a multi-arm block type polycaprolactone color-changing polymer and a preparation method thereof, and light-operated color-changing sponge and a preparation method thereof. The polymer is formed by grafting a donor-acceptor Stenhouse adduct onto multi-arm polycaprolactone, wherein exciting light used for color changing is visible light with a wavelength of 520 nm, so that irreversible damage of traditional ultraviolet light to a molecular structure is avoided, the service life is longer theoretically, and the color changing speed is high. The color-changing sponge prepared from the polymer is uniform and stable in color changing phase dispersion, not prone to elution, capable of being repeatedly used and large in color changing range span.

Description

technical field [0001] The invention relates to the technical field of preparation of color-changing sponges, in particular to a multi-arm block polycaprolactone color-changing polymer, light-controlled color-changing sponges and preparation methods thereof. Background technique [0002] At present, the method for preparing color-changing sponge is mostly dipping method, wherein, it is divided into pre-dipping method and post-dipping method. The pre-dipping method is to pre-mix the molecules with color-changing properties into the precursor of the sponge preparation, and then foam the color-changing sponge. The post-dipping method is to impregnate the existing sponge with surfactants, binders and color-changing properties. The color-changing sponge is obtained by stabilizing the molecules with color-changing properties on the porous inner surface of the sponge through physical or chemical adsorption. [0003] Although the above preparation method is simple and the prepared ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F287/00C08G63/08C08G63/78C08J9/12C08L51/00
CPCC08F287/00C08G63/08C08G63/78C08J9/122C08J2351/00C08J2203/06C08J2203/08
Inventor 王东升孙梵熙段永丽张汉君王真熊晓瑜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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