Underwater oleophobic structural color film, and preparation method and application thereof

A structural color and thin film technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of complex structure manufacturing, and achieve the effect of improving strength, making up for poor heat resistance, and enhancing underwater oleophobic effect.

Active Publication Date: 2019-03-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the existing underwater oleophobics, the colored layer is generally sprayed first, and then a

Method used

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  • Underwater oleophobic structural color film, and preparation method and application thereof
  • Underwater oleophobic structural color film, and preparation method and application thereof
  • Underwater oleophobic structural color film, and preparation method and application thereof

Examples

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preparation example Construction

[0033] The preparation method of the underwater oleophobic structural color film of the present invention comprises the following steps:

[0034] 1) Preparation of modified PS colloidal microsphere emulsion: Purification of styrene, adding the purified styrene, α-methacrylic acid and deionized water into a three-neck round bottom flask, magnetically stirring for more than 30min to make the solution evenly mixed, and then Put it in an oil bath at 75-90°C, stir magnetically for 30-60min, inject potassium persulfate solution, and react under constant temperature to obtain a modified PS colloidal microsphere emulsion; a mixture of styrene, α-methacrylic acid and deionized water The ratio is: (14-28)mL: (1-2)mL: (180-360)mL.

[0035] 2) Encapsulated TiO 2Shell structure: the obtained modified PS colloidal microsphere emulsion is dispersed in the mixed solution of ethanol and acetonitrile, which is recorded as liquid A; butyl titanate (TBOT) is dissolved in the mixed liquid of etha...

Embodiment 1

[0041] A preparation method of an underwater oleophobic structural color film, comprising the following steps:

[0042] 1) Raw material pretreatment: Purify styrene, wash twice with 10% sodium hydroxide solution, then wash more than three times with ultrapure water until the solution is neutral to remove polymerization inhibitor, add a small amount of solid anhydrous chlorination Calcium, remove the water, seal and store in the refrigerator for later use.

[0043] 2) Preparation of modified PS colloidal microsphere emulsion: Purification of styrene, take 14mL of purified styrene solution, 1mL of α-methacrylic acid, and 180mL of deionized water in a three-necked round-bottomed flask, stir magnetically for 30min, and mix the solution , placed in an oil bath at 80°C, magnetically stirred for 30min, injected with a concentration of 1.7g / mL, 20mL of potassium persulfate solution, and reacted at a constant temperature of 75°C for 7h to obtain a modified PS colloidal microsphere emul...

Embodiment 2

[0047] A preparation method of an underwater oleophobic structural color film, comprising the following steps:

[0048] 1) Raw material pretreatment: Purify styrene, wash twice with 10% sodium hydroxide solution, then wash more than three times with ultrapure water until the solution is neutral to remove polymerization inhibitor, add a small amount of solid anhydrous chlorination Calcium, remove the water, seal and store in the refrigerator for later use.

[0049] 2) Preparation of modified PS colloidal microsphere emulsion: Purification of styrene, take 20mL of purified styrene solution, 1.5mL of α-methacrylic acid, and 240mL of deionized water in a three-necked round-bottomed flask, and magnetically stir for 30min to make the solution Mix, put in an oil bath at 80°C, stir magnetically for 30min, inject 20mL of potassium persulfate solution at a concentration of 1.7g / mL, react at a constant temperature of 80°C for 8h, and obtain a modified PS colloidal microsphere emulsion; ...

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Abstract

The invention provides an underwater oleophobic structural color film, and a preparation method and application thereof. The preparation method comprises the following steps: 1, preparing a modified PS colloid microsphere emulsion by soap-free liquid polymerization; 2, wrapping the modified PS colloid microsphere with a TiO2 shell layer structure by a mixed solvent process to obtain a PS@TiO2 microsphere dispersion; and 3, spraying for forming a film: centrifugally washing the PS@TiO2 microsphere dispersion obtained in step 2, then adding the obtained material to anhydrous ethanol, then addingcarbon black, carrying out ultrasonic dispersion to obtain a spray solution, spraying the spray solution on a pretreated glass sheet by a spray gun to obtain a PS@TiO2 structural color film, completely dissolving WBPU (waterborne polyurethane) in water, and spraying the obtained WBPU solution on the surface of the PS@TiO2 structural color film to obtain the structural color film with an underwater oleophobic performance. The color of the structural color film does not change with the change of the viewing angle, and the good underwater oleophobic performance is obtained under the combined action of the waterborne polyurethane.

Description

technical field [0001] The invention belongs to the technical field of preparation of structural chromatic materials, and in particular relates to an underwater oleophobic structural chromatic film and its preparation method and application. Background technique [0002] Chemical colors and structural colors are two major categories of colors. Structural color presents color through optical processes such as grating diffraction, scattering, and interference between the special organizational structure of the object itself and white light. It has many advantages such as bright color, never fading, and environmental friendliness, and overcomes the resource destruction caused by chemical colorants. It has great application prospects in anti-counterfeiting, painting, detection and decoration, etc., and it has been a research hotspot in the past ten years. [0003] Usually, the light forms a photonic crystal surface with a periodic structure through dry radiation, diffraction, s...

Claims

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Application Information

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IPC IPC(8): C03C17/00C09D125/08C09D7/61C09D175/04C08F212/08C08F220/06
CPCC03C17/009C08F212/08C08K2003/2241C09D125/08C09D175/04C09D7/61C08K3/22C08K3/04C08F220/06
Inventor 王芬薛雨朱建锋罗宏杰王莹赵婷武清卢博
Owner SHAANXI UNIV OF SCI & TECH
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