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Stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect and preparation method thereof

A technology of polymer emulsion and hysteresis effect, applied in the field of emulsion polymerization, can solve the problems of loss of discoloration ability, poor reversibility and stability, application limitations, etc., and achieve broad application range, good thermal stability and storage stability, and raw material utilization high rate effect

Active Publication Date: 2020-01-14
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional reversible thermochromic materials are composed of inorganic, liquid crystal and organic materials. Under the influence of acid-base solution, organic solvent and external factors (such as light and heat), it is easy to lose the color changing ability, resulting in reversibility and stability. The performance is poor, so its application is limited to a certain extent

Method used

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  • Stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect and preparation method thereof
  • Stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect and preparation method thereof
  • Stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect of the present embodiment is a mixture of crystal violet lactone, bisphenol A and capric triglyceride as the core, and the capric glycerin The triester is the reaction medium that determines the temperature at which the color reaction and hysteresis effect of crystal violet lactone and bisphenol A occur. The core-shell structure polymer with maleic anhydride, styrene and methyl methacrylate as the shell is water-based In the emulsion, the inner core is dispersed in the aqueous emulsion of the core-shell structure polymer by an emulsifier, and the mass ratio of crystal violet lactone, bisphenol A and capric triglyceride is 1:2:40.

[0033] The solid content of the core-shell polymer emulsion described in this example is 30%, the particle size distribution range is 825-3580nm, and the average particle size is 1852nm, see figure 2 .

[0034] The preparation method of the stab...

Embodiment 2

[0048] The stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect of this embodiment is based on dienyl halo-2-benzo[C]furanone, stearic acid terephthalic acid and The mixture of capric triglycerides is the inner core, and the capric triglycerides determine the color reaction and hysteresis effect of dienyl halo-2-benzo[C]furanone and stearic acid terephthalic acid The temperature of the reaction medium, the polymer of maleic anhydride, styrene and methyl methacrylate is the core-shell structure polymer aqueous emulsion of the shell, and the inner core is dispersed in the core-shell structure polymer water-based emulsion by an emulsifier. In the emulsion, the mass ratio of the dienyl halo-2-benzo[C]furanone, stearic acid terephthalic acid and capric triglyceride is 1:1:1.

[0049] The core-shell polymer emulsion described in this example has a solid content of 20%, a particle size distribution range of 825-3580 nm, and an average particle ...

Embodiment 3

[0062] The stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect of this embodiment is based on a mixture of thermosensitive green, α-naphthol and ethyl caprate as the core, and the ethyl caprate It is the reaction medium that determines the temperature of thermosensitive green and α-naphthol color reaction and hysteresis effect. It is a core-shell polymer aqueous emulsion with a polymer of maleic anhydride, styrene and methyl methacrylate as the shell. The inner core is dispersed in the aqueous emulsion of the core-shell structure polymer by an emulsifier, and the mass ratio of the thermosensitive green, α-naphthol and ethyl caprate is 1:4:50.

[0063] The core-shell polymer emulsion described in this example has a solid content of 50%, a particle size distribution range of 825-3580 nm, and an average particle size of 1852 nm.

[0064] The preparation method of the stable thermally reversible discoloration core-shell polymer emulsion wit...

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Abstract

The invention discloses a stable thermally induced reversible color-changing core-shell type polymer emulsion with hysteresis effect and a preparation method thereof. The emulsion takes a mixture of an electron-donating developing organic compound (A), an electron-accepting compound (B) and a reaction medium (C) as a core, the (C) determines temperature at which color development reaction and hysteresis effect of the (A) and (B) occur, and a polymer of maleic anhydride, styrene and methyl methacrylate is taken as a shell, wherein the core is dispersed in the core-shell structure polymer water-based emulsion by virtue of an emulsifier, and a mass ratio of the (A) to the (B) to the (C) is 1:(1-20):(1-100). The preparation method comprises the step of sequentially synthesizing the core material, the emulsifier and the core-shell type polymer emulsion. The oil-in-water type emulsion disclosed by the invention is environment-friendly and stable in performance, has resistance to acid, alkali, salt and electrolyte solution, organic solvent resistance and reversible color-changing property and has delay with large temperature range on temperature sensitivity.

Description

technical field [0001] The invention relates to the technical field of emulsion polymerization, in particular to a stable thermally reversible discoloration core-shell polymer emulsion with hysteresis effect and a preparation method thereof. Background technique [0002] Reversible thermochromism refers to the characteristic that one color changes to another color when heated, and returns to the original color after cooling. Reversible thermochromic material is a special functional material, which has the characteristic that one color changes to another color when heated, and returns to the original color after cooling. This thermochromic material that changes with temperature has a wide range of uses, and is currently mainly used in aerospace, information processing, automotive industry, architectural coatings industry, textiles and clothing, and daily necessities, such as food preservation and refrigeration temperature indication, anti-counterfeiting Signage, imaging mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/08C08F220/14C08F212/08C08F2/30C09D11/50C09K9/02
CPCC08F212/08C08F220/14C08F222/08C09D11/50C09K9/02C08F2/30
Inventor 邹其超徐越柴仕淦张金枝
Owner HUBEI UNIV
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