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A photonic crystal material that resists UV rays/infrared and enhances color and color fastness

A photonic crystal and color technology, applied in optics, optical components, instruments, etc., can solve the problems affecting the order of microspheres, the reduction of spectral intensity, and strong angle dependence, so as to achieve unity, increase spectral intensity, and improve The effect of color intensity

Active Publication Date: 2018-10-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, photonic crystals still have their inherent defects: strong angle dependence, that is, photonic crystals will display different colors as the angle of human line of sight changes. In most applications, the ideal colorant It should be a single color, that is, the color will not change with the change of the viewing angle of the person
[0005] Due to the high degree of light absorption of the black dye, which can absorb almost all bands of visible light (450nm-750nm), while achieving the single color of the photonic crystal, it will also absorb part of the photonic band gap light, so that the overall spectral intensity of the structural color is reduced, resulting in color loss. dim
And in this patent, the interstitial mode of black dyestuff (such as figure 1 shown) will affect the order of the microsphere arrangement (more dislocations or other defects appear), making the reflection effect of the photonic crystal unsatisfactory, and at the same time, the black dye filled between the opal microspheres is prone to leakage problems , affecting the color fastness of the material

Method used

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  • A photonic crystal material that resists UV rays/infrared and enhances color and color fastness
  • A photonic crystal material that resists UV rays/infrared and enhances color and color fastness
  • A photonic crystal material that resists UV rays/infrared and enhances color and color fastness

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Embodiment 1

[0042] Visible light can be roughly divided into six parts according to the color of visible light: purple (380nm-450nm), blue (450nm-495nm), green (495nm-570nm), yellow (570nm-590nm), orange (590nm-620nm) , red (620nm-750nm).

[0043] The main reason why objects have multiple colors is the selective absorption and reflection of spectral components by objects. Therefore, when PS microspheres in a certain particle size range are selected, an opal structure with a main reflection peak in a specific wavelength range can be prepared. When the photonic crystal is used, the opal structure photonic crystal will produce the corresponding structural color. When the microsphere surface of the opal structure photonic crystal is uniformly doped with a small amount of corresponding color pigment, the color enhanced opal photonic crystal can be prepared. The color of the trace pigment is the same as the structural color of the photonic crystal, which not only eliminates the angle dependenc...

Embodiment 2

[0070] According to the principle of color generation and the conclusion of geometric amplification of color by photonic crystal structure described in Example 1, a color enhancing material with an inverse opal structure was prepared: polystyrene microspheres were selected as colloidal particles to prepare a template with an opal structure , and then fill the precursor solution of the filling material into the gap of the template, or mix the two directly in an appropriate ratio, and remove the template after the filling material is solidified to obtain an inverse opal photonic crystal with regularly arranged spherical air holes .

[0071] Control of photonic crystals with inverse opal structure: Same as in Example 1, the reflection wavelength of photonic crystals with inverse opal structures can be changed by selecting microspheres with different particle sizes. It should be noted that the expansion and contraction of the filling material after removing the template needs to be...

Embodiment 3

[0095] Polystyrene microspheres (PS) were selected as colloidal particles to prepare opal-type photonic crystal structure coatings with UV-reflecting properties.

[0096] The wavelength range of ultraviolet light is 10nm-380nm, adjust the reflection peak wavelength of photonic crystal (the relation of reflection peak wavelength and microsphere particle size can be calculated according to the relational expression in embodiment 1), make it fall in the ultraviolet wavelength range, just can Reflect and block ultraviolet rays, so as to well protect the pigments in photonic crystals and the substrates / products to which they are attached.

[0097] The specific preparation method is:

[0098] 1, the preparation particle diameter by the method for soap-free emulsion polymerization described in embodiment 1 is the monodisperse polystyrene microsphere emulsion of 130nm, the amount of the added acrylic acid is 4.83ml, and styrene is 38.5ml;

[0099] 2. Mix blue and yellow pigment solut...

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Abstract

The invention discloses an anti-UV / infrared and color-and-color-fastness-enhanced photonic crystal material, which comprises coating, thin film, powder and fiber forms and the like. The material has an opal or inverse opal photonic crystal structure, wherein in the opal photonic crystal, pigments are uniformly distributed on the surface of a microsphere, and reflection peak wavelength thereof is adjusted to enable the reflection peak wavelength to be within ultraviolet, visible and infrared regions respectively, thereby achieving anti-UV, color enhancement and temperature adjustment effects; and in the inverse opal photonic crystal, the pigments are uniformly distributed in a filling material, and reflection peak wavelength thereof is adjusted to enable the reflection peak wavelength to be within ultraviolet, visible and infrared regions respectively, thereby achieving anti-UV, color enhancement and temperature adjustment effects. Raw materials of the crystal material are available; realization method is simple (no substrate selectivity, high success rate); and the photonic crystal material is targeted in function and has wide application and extremely high popularization value.

Description

technical field [0001] The invention relates to the field of research and development and preparation of materials, in particular to a photonic crystal material that resists UV rays / infrared rays and enhances color and color fastness. Background technique [0002] Structural color, also known as physical color, is the color that appears through the interference, diffraction, and scattering of light and the microscopic ordered structure of materials. For example, the colorful appearance of opal is not because it contains pigments, but is related to the microscopically ordered photonic crystal structure formed by opal’s submicron SiO2. Interference, diffraction, dispersion, etc. occur in the gap, thereby reflecting light of a specific wavelength. [0003] However, in practical applications, photonic crystals still have their inherent defects: strong angle dependence, that is, photonic crystals will display different colors as the angle of human line of sight changes. In most ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 刘向阳胡帆
Owner XIAMEN UNIV