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Wide-wavelength high-reflectivity pollution-resistant colloid photonics crystal diffused reflection film

A technology of colloidal photonic crystals and high reflectivity, applied in the field of optical materials, can solve problems such as reducing reflectivity, achieve strong adhesion, save energy, and have a wide range of applications

Inactive Publication Date: 2009-02-11
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, due to the characteristics of the surface structure, porous reflective materials are easily immersed by liquids, which reduces the reflectivity.

Method used

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  • Wide-wavelength high-reflectivity pollution-resistant colloid photonics crystal diffused reflection film
  • Wide-wavelength high-reflectivity pollution-resistant colloid photonics crystal diffused reflection film
  • Wide-wavelength high-reflectivity pollution-resistant colloid photonics crystal diffused reflection film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to the technology provided by the application number: 200510011219.2, the colloidal emulsion used for assembling the membrane was prepared. The monomer mixture methyl methacrylate (1 g), styrene (19 g), and methacrylic acid (1 g), the pH buffer ammonium bicarbonate (0.2 g) and sodium chloride (about 1 g) were dispersed in In water (95mL), polymerize as described in the summary of the invention.

[0047] Dilute the above-prepared monodisperse polymer latex (emulsion particle size: 1182nm) in water at room temperature at a ratio of 1:10 (volume ratio), and disperse uniformly by ultrasonication. Then evenly cover the base material of clean glass, silicon wafer or stainless steel plate, and form a colloidal photonic crystal film after the water evaporates at 20°C.

[0048] Such as Figure 1a As shown, the colloidal photonic crystal film is assembled by periodically arranged and orderly monodisperse latex particles, and the particle size is 1182nm. Figure 1b Vis...

Embodiment 2

[0054] According to the technology provided by the application number: 200510011219.2, the colloidal emulsion used for assembling the membrane was prepared. Disperse the monomer mixture methyl methacrylate (1 g), styrene (19 g), and methacrylic acid (1 g), pH buffer ammonium bicarbonate (0.2 g) and sodium chloride (0-1 g) Polymerization was carried out as described in the Summary of the Invention in water (95 mL).

[0055] Dilute the monodisperse polymer latex prepared above (the latex particle sizes are 402, 603, 834, 1182nm respectively) in water at room temperature at 1:40 (volume ratio), and disperse evenly by ultrasonic. Then, the colloidal photonic crystal film was formed by volatilizing the solution at 70° C. by vertical deposition method in a vacuum drying oven (without vacuuming).

[0056] Figure 3a , 3b , 3c, and 3d are SEM images of the surface of the colloidal photonic crystal film obtained under the above conditions respectively (the latex particle sizes are 4...

Embodiment 3

[0060] As in Example 2, the micelle emulsion used for assembling the membrane was prepared.

[0061] Dilute the monodisperse polymer latex prepared above (the latex particle sizes are 402, 603, 834, 1182nm respectively) in water at room temperature at 1:10 (volume ratio), and disperse evenly by ultrasonic. Then evenly cover the base material of clean glass, silicon wafer or stainless steel plate, and form a colloidal photonic crystal film after the water evaporates at 20°C.

[0062] The surface structure of the obtained colloidal photonic crystal film is similar to the SEM image of Example 2.

[0063] Figure 5 Comparison of the diffuse reflectance spectra of colloidal photonic crystal polymer films with different particle sizes prepared above. Compared with Example 2, except that the photonic band gaps of films a, b, and c are slightly widened, and the reflectivity of film d is also slightly higher, the trends of the reflection spectra are consistent.

[0064] The resultin...

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Abstract

This invention belongs to optical material field, which especially relates to use of colloid photon crystal diffuse reflection film which is of wide wave length, high reflective index and fouling resistant. Stated film is used for capsid of laser device which can increase transmission function of light energy. The invention can used for projection screen, road direction card, display device of electronic equipment, poor light element of illuminating intensifier and solar energy collecting device; stated film is made up of monodisperse polymer emulsion particle which has hard core-soft shell structure. Diameter of emulsion particle is 800nm-1200nm. The inventions is better to be 1100-1200nm. Sated film is using cycle structure that is formed by self regulation monodisperse polymer emulsion particle to make surface constitutional unit. The invention can achieve effect of increasing surface roughness and decreasing optical coupling. The invention can implement to prepare diffuse reflection film of whole visible light zone and near infrared zone, high reflective index, uniform reflection, fouling resistant and wear-resisting.

Description

technical field [0001] The invention belongs to the field of optical materials, and in particular relates to the use of a colloidal photonic crystal diffuse reflection film with wide wavelength and high reflectivity and anti-pollution. Background technique [0002] Diffuse reflection, also known as "Lambertian" reflection, refers to the brightness with which light can be reflected from multiple angles. In contrast, specular reflection can only be reflected at an angle equal to the incident angle of the light contact point. In our practical applications, there are many times when we not only hope that the light has a high reflectivity, but also hope that the light can be evenly distributed and reflected from the surface, which requires high-quality diffuse reflection products. For example, a projection screen used for movie projection must have a wide enough field of view while having high reflectivity, so as to provide a clear image for most audiences. Another example is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02C08J5/18
Inventor 胡俊平宋延林梁杰王京霞江雷
Owner INST OF CHEM CHINESE ACAD OF SCI