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Preparation method for multi-color film

A kind of colorful and thin-film technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of single response, single color change, etc., and achieve the effect of broad application prospects

Inactive Publication Date: 2013-08-28
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem that the current inverse opal photonic crystal can only produce a single response under a single external stimulus, that is, a single color change, and provides a preparation method for a colorful film

Method used

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  • Preparation method for multi-color film

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specific Embodiment approach 1

[0017] Specific Embodiment 1: In this embodiment, a method for preparing a colorful thin film is specifically prepared according to the following steps:

[0018] 1. Mix L-arginine and deionized water, then put it in a water bath, stir L-arginine and deionized water evenly, then add cyclohexane to obtain a mixed solution; adjust the temperature of the water bath to 55°C-65°C ℃, control the stirring speed at 280rpm-320rpm, stir the mixed solution evenly, then keep the temperature of the water bath at 58℃-62℃, add ethyl orthosilicate, and stir for 18h-24h to obtain SiO 2 Seeds, wherein the mass ratio of L-arginine to deionized water is (12-14) mg: (9-11) mL, the volume of cyclohexane is 16 mL-20 mL, and the volume of tetraethyl orthosilicate 20mL ~ 24mL;

[0019] 2. Mix absolute ethanol and ammonia water with a mass concentration of 25% to 30%, then put it in a water bath with a temperature of 20°C to 30°C, and then add the SiO obtained in step 1 2 Seeds, control the stirring s...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment is different from Embodiment 1 in that: in step 1, the stirring speed is controlled to 300 rpm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment differs from Embodiment 1 in that the volume ratio of the mass of L-arginine to deionized water in step 1 is 13 mg:10 mL. Others are the same as in the first embodiment.

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Abstract

The invention provides a preparation method for a multi-color film, relating to a preparation method for a film. The objective of the invention is to overcome the problem that an inverse opal photonic crystal has a single response to a single outside stimulus, i.e., a single change in color, in the prior art. The preparation method comprises the following steps: 1, preparing a SiO2 seed; 2, preparing a SiO2 colloidal microsphere; 3, carrying out washing and drying; 4, preparing a SiO2 colloidal crystal template; 5, preparing a PMMA composite film; and 6, carrying out stretching. The multi-color film prepared in the invention is a photonic crystal with an inverse opal structure and has an ordered porous structure; meanwhile, the multi-color film has a certain orientation degree in a certain direction, so characteristics of the film in the field of a three dimensional structure are maintained. The preparation method provided by the invention is used for preparing the multi-color film.

Description

technical field [0001] The present invention relates to a method for preparing a thin film. Background technique [0002] Since Yablonovitch and John proposed the concept of photonic crystals in 1987, the research of photonic crystals has been highly valued by people in the past 20 years. Photonic crystals are materials with an ordered structure formed by arranging two or more materials with different dielectric constants (refractive indices) in a certain periodic order in space. When the electromagnetic wave propagates in this material with a periodic structure, it will be modulated by the periodic potential field formed by the dielectric, thus forming a photonic energy band similar to the semiconductor energy band structure. If there is no overlap between photonic energy bands, a photonic band gap will be formed. Photons whose frequency falls in the band gap cannot propagate in photonic crystals, so photonic crystals are also called photonic bandgap materials. As an imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J9/26C08L33/12G02F1/00
Inventor 孙立国卜志鹏赵冬梅汪成
Owner HEILONGJIANG UNIV
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