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Photon crystal film of ultraviolet polymer colloid with photon band gap and its prepn and use

A technology of colloidal photonic crystals and photonic bandgap, applied in cosmetic preparations, dressing preparations, skin care preparations, etc., can solve problems such as no special requirements, and achieve simple equipment, simple preparation process, easy size and shape The effect of control

Active Publication Date: 2007-01-03
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The second purpose of the present invention is to provide a method for effectively overcoming the defects of large-scale preparation of colloidal photonic crystal films that are difficult to achieve by traditional methods, without the need for specific assembly devices, and without special requirements for the temperature and humidity of the surrounding environment. A simple preparation method of a polymer colloidal photonic crystal film with a large photonic band gap in the ultraviolet region. This method has the advantages of simple process, low cost, and no special requirements for equipment.

Method used

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  • Photon crystal film of ultraviolet polymer colloid with photon band gap and its prepn and use
  • Photon crystal film of ultraviolet polymer colloid with photon band gap and its prepn and use
  • Photon crystal film of ultraviolet polymer colloid with photon band gap and its prepn and use

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Embodiment 1

[0055] Embodiment 1: (preparation of monodisperse polymer latex particles)

[0056] Monomer mixture methyl methacrylate (0.5 gram), styrene (7 gram), methyl styrene (8 gram) and acrylic acid (0.5 gram), pH buffer ammonium bicarbonate (0.5 gram) and emulsifier ten A mixture of sodium dialkylbenzenesulfonate and sodium dodecylsulfonate (1:1 by weight) (0.038g) was dispersed in water (100mL), and the resulting mixed system was stirred and mixed at 500rpm, and heated to 65°C. Add 10 milliliters of ammonium persulfate (0.5 gram is dissolved in 20 milliliters of water) aqueous solution and start to react, add 5 milliliters of ammonium persulfate aqueous solution again after reacting 4.5 hours, all the other ammonium persulfate aqueous solutions add after continuing reaction 4.5 hours, The reaction was then continued for 3 hours to end. Finally, monodisperse polymer latex particles with a monodispersity index less than or equal to 0.005 and a particle size range of 100 nm are obtai...

Embodiment 2

[0058] Embodiment 2: (preparation of monodisperse polymer latex particles)

[0059] The monomer mixture vinyl acetate (0.5 g), butyl methacrylate (0.5 g), methyl styrene (21 g), acrylamide (0.6 g) and acrylic acid (0.4 g), pH buffer sodium hydrogen phosphate (0.6 gram) and the mixture of ammonium bicarbonate (0.6 gram) and emulsifier sodium lauryl sulfate (0.0547g) are dissolved in water (100mL), and the mixed system obtained is stirred and mixed at 800rpm, and heated to 85 ℃. Add 10 milliliters of initiator (obtained by dissolving potassium persulfate (0.6 gram) and ammonium persulfate (0.4 gram) in 20 milliliters of water) to start the reaction, add 5 milliliters of initiator aqueous solution after reacting for 2 hours, and the rest The aqueous initiator solution was added after continuing the reaction for 2 hours, and the reaction was then terminated after continuing for 1 hour. Finally, monodisperse polymer latex particles with a monodispersity index less than or equal t...

Embodiment 3

[0061] Embodiment 3: (preparation of monodisperse polymer latex particles)

[0062] The monomer mixture isobutyl methacrylate (1.2 grams), methyl styrene (18 grams) and methacrylic acid (1.2 grams), pH buffer sodium bicarbonate (1.0 grams) and emulsifier dodecyl sulfonate Sodium bicarbonate (0.0486 mg) was dissolved in water (100 mL), and the resulting mixed system was stirred and mixed at 600 rpm, and heated to 75°C. Add 10 milliliters of potassium persulfate (0.8 gram is dissolved in 20 milliliters of water) aqueous solution and start to react, react 3.5 hours and then add 5 milliliters of potassium persulfate aqueous solution, all the other potassium persulfate aqueous solutions add after continuing reaction 3 hours, The reaction was then terminated after 2 hours. Finally, monodisperse polymer latex particles with a monodispersity index less than or equal to 0.005 and a particle size range of about 100 nm are obtained.

[0063] When changing the amount of emulsifier sodiu...

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Abstract

The present invention relates to photo crystal film, and is especially one kind of colloidal photon crystal film and its preparation and application in ultraviolet preventing material or cosmetics material. The colloidal photon crystal film is prepared through coating monodispersed polymer latex in hard core-soft shell structure on flat substrate and volatilizing the dispersing liquid; the obtained monodispersed polymer latex particle has shell of 20-50 nm thickness, particle size of 100-160 nm and multiple dispersion index not greater than 0.005; and colloidal photon crystal film has photon band gap in the ultraviolet region of 200-400 nm. The colloidal photon crystal film is used as the ultraviolet preventing material in cosmetics, paint, etc.

Description

technical field [0001] The invention belongs to the technical field of preparation of colloidal photonic crystal films, in particular to a polymer colloidal photonic crystal film with a large photonic band gap in the ultraviolet region and a preparation method thereof; application. Background technique [0002] Colloidal photonic crystal materials refract or diffract light with a periodic structure formed by the regular arrangement of monodisperse latex particles to achieve special regulation of light. Depending on the size of the periodic arrangement, the wavelength of the modulated light is different. Correspondingly prepared colloidal crystals have different application fields. In the usual patent literature, colloidal photonic crystal films are mainly used in filters (such as CN: 01105105.1, CN: 98110990.X), photoelectric switches (CN: 02160207.7), optical waveguides (CN: 02804125.9, CN: 99810798, CN: 01132293.4, CN: 02811132.X), optical fiber (CN: 00803964.X, CN: 008...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08F12/08C08F20/10C08F2/22A61K8/81A61Q17/04
Inventor 王京霞宋延林梁杰刘必前江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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