A simple preparation method of environment-friendly structural color emulsion

An environmentally friendly and structurally colored technology, applied in skin care preparations, medical preparations containing active ingredients, pharmaceutical formulas, etc., can solve problems such as human and environmental hazards and pollution, and avoid cumbersome and complicated processes and preparation steps Convenience, single color effect

Active Publication Date: 2022-07-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to invent a simple and convenient method for preparing environment-friendly structural color emulsion pigments. The structural color emulsion pigments prepared by the method can replace existing organic or inorganic pigments in some aspects, and can be used in cosmetics and other fields to solve the problem of Harm to human body and environment and pollution problems of existing pigments

Method used

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  • A simple preparation method of environment-friendly structural color emulsion
  • A simple preparation method of environment-friendly structural color emulsion
  • A simple preparation method of environment-friendly structural color emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this example, the environment-friendly structural color emulsion drops, and the specific preparation steps are as follows:

[0039] (1) Polymerization of polylactic acid (PLA) and polyethylene oxide (PEO) by the method of ROMP completely obtains an amphiphilic block polymer brush, wherein the volume fraction of the hydrophilic part of polyethylene oxide (PEO) is 20%.

[0040] (2) Dissolving the amphiphilic block polymer brush synthesized in step (1) in toluene, adding polycaprolactone (PCL) with a mass fraction of 20% of the amphiphilic polymer to prepare a concentration of 20 mg / mL The solution was added to the deionized aqueous solution containing polyvinyl alcohol (PVA) with a mass fraction of 2%, and the amphiphilic emulsion droplets were formed by shaking them. Under the condition of RH), the time for the organic solvent toluene to be completely volatilized is 50h, and blue structural color emulsion droplets are obtained, and the reflection wavelength is at 445...

Embodiment 2

[0042] In this example, the environment-friendly structural color emulsion drops, and the specific preparation steps are as follows:

[0043] (1) Polymerization of polylactic acid (PLA) and polyethylene oxide (PEO) by the method of ROMP completely obtains an amphiphilic block polymer brush, wherein the volume fraction of the hydrophilic part of polyethylene oxide (PEO) is 50%.

[0044] (2) Dissolving the amphiphilic block polymer brush synthesized in step (1) in toluene, adding polycaprolactone (PCL) with a mass fraction of 20% of the amphiphilic polymer to prepare a concentration of 20 mg / mL The solution was added to the deionized aqueous solution containing 2% polyvinyl alcohol (PVA), and the amphiphilic emulsion droplets were formed by shaking them. Under the condition of RH), the time for the organic solvent toluene to be completely volatilized is 50h, and a green structural color emulsion droplet is obtained, and its reflection wavelength is 528nm. The amphiphilic block...

Embodiment 3

[0046] In this example, the environment-friendly structural color emulsion drops, and the specific preparation steps are as follows:

[0047] (1) Polymerization of polylactic acid (PLA) and polyethylene oxide (PEO) by the method of ROMP completely obtains an amphiphilic block polymer brush, wherein the volume fraction of the hydrophilic part of polyethylene oxide (PEO) is 90%.

[0048] (2) Dissolving the amphiphilic block polymer brush synthesized in step (1) in toluene, adding polycaprolactone (PCL) with a mass fraction of 20% of the amphiphilic polymer to prepare a concentration of 20 mg / mL The solution was added to the deionized aqueous solution containing 2% polyvinyl alcohol (PVA), and the amphiphilic emulsion droplets were formed by shaking them. Under the condition of RH), the time for the organic solvent toluene to be completely volatilized is 50h, and the red structural color emulsion droplets are obtained, and the reflection wavelength is at 604nm. The amphiphilic ...

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Abstract

The invention relates to a simple preparation method of an environment-friendly structural color emulsion. Through the preparation of block polymer brushes, the preparation of polymer emulsion droplets and the preparation of structural color emulsion; the polymer is dissolved in an organic solvent, and through emulsification between the organic solution and the aqueous solution, when the organic solvent is completely volatilized, the The structural color emulsion has convenient preparation steps and avoids the tedious and complicated process of preparing environmentally friendly structural colors using cellulose as a template. The resulting structural color emulsion can be freely changed by changing the molecular weight or degree of polymerization of raw monomers and experimental conditions such as surfactant PVA concentration, organic solvent volatilization time, volatilization temperature and humidity, polymer concentration, vegetable oil content and other factors. The reflection wavelength of the droplet can be adjusted arbitrarily within the range of 320nm to 800nm. Structural color emulsions use environmentally friendly materials as raw materials, which have far-reaching significance for the development of green and sustainable pigments, and have potential applications in the production fields such as cosmetics.

Description

technical field [0001] The invention belongs to the field of environment-friendly polymers, and in particular relates to a simple method for preparing structural color emulsion pigments by reverse emulsification and self-assembly. Background technique [0002] Structural Color, also known as Physical Color, has been recognized by the scientific community because of its high brightness, high saturation, never fading, iridescence, polarization effect and other characteristics that ordinary pigments or pigments do not have. and the attention of the engineering community. Structural colors exist widely in nature. For example, there are very thin wax layers, engraved points, grooves or scales on the body wall of insects, which can make light waves refract, diffuse reflection, diffraction or interference. [0003] Pigments can be divided into organic pigments and inorganic pigments. Organic pigments are generally taken from plants and marine animals. For example, as early as in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L87/00C08L67/04C08L91/00C08L29/04C08G81/00A61K8/06A61K8/84A61K8/85A61K8/86A61K8/92A61Q19/00
CPCC08J3/03C08G81/00A61K8/922A61K8/84A61K8/85A61K8/86A61K8/06A61Q19/00A61K2800/412A61K2800/43C08J2387/00C08J2467/04C08J2491/00C08J2429/04
Inventor 宋东坡郭麒麟李玉莲
Owner TIANJIN UNIV
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