Bacterial cellulose base optical thin film and preparation method thereof

A bacterial cellulose-based optics technology, applied in optics, optical components, instruments, etc., can solve the problems of volume shrinkage affecting the mechanical properties of materials, reducing the refractive index of materials, and restricting applications, so as to increase the refractive index and thermo-optic stability , excellent thermal and light stability, and the effect of ensuring light transmission

Inactive Publication Date: 2015-04-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, for the sol-gel method, however, small molecules (H 2 O,E t OH) large volume shrinkage affects the mechanical properties of the material, and the generated inorganic region has a lower refractive index than the crystalline structure, which is not conducive to improving the refractive index of the composite material
For the direct blending method, this method can ensure that the particle size and size distribution of the nanoparticles are controllable, but the nanoparticles are easy to agglomerate during the dispersion process, and the refractive index of the nanoparticles modified by organic molecules is greatly reduced.
Secondly, the matrix materials of high-refractive-index nanocomposites are usually organically synthesized high-refractive-index optical resins. The change of the refractive index decreases, which greatly limits its application

Method used

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  • Bacterial cellulose base optical thin film and preparation method thereof
  • Bacterial cellulose base optical thin film and preparation method thereof
  • Bacterial cellulose base optical thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1) Cut the bacterial cellulose film produced by Acetobacter xylinum into small pieces with a size of 4cm×5cm×0.5cm, place it in a 1% NaOH alkaline solution with a mass concentration of 1% for 3 hours, and then rinse it repeatedly with deionized water to neutral;

[0056] 2) Immerse the bacterial cellulose film in 0.05mol / L zinc acetate solution for 24 hours at room temperature and magnetic stirring until the adsorption equilibrium;

[0057] 3) Add thioacetamide, wherein the molar ratio of thioacetamide to zinc acetate is 3:1;

[0058] 4) Adjust the pH value of the reaction system to 2, and then react at 90°C for 2 hours under the protection of nitrogen;

[0059] 5) Take out the reacted bacterial cellulose membrane, wash and backwash it with deionized water until neutral, and obtain a bacterial cellulose wet membrane composited with zinc sulfide nanoparticles;

[0060] 6) Perform solvent exchange treatment on the obtained bacterial cellulose wet film of composite zinc ...

Embodiment 2

[0064] 1) Cut the bacterial cellulose film produced by Acetobacter acetogenes into small pieces with a size of 4cm×5cm×0.5cm, place it in a 3% NaOH alkaline solution with a mass concentration of 2 hours for magnetic stirring, and then rinse it repeatedly with deionized water to neutral;

[0065] 2) Immerse the bacterial cellulose film in a 0.1mol / L zinc chloride solution for 20 hours at room temperature and under magnetic stirring until the adsorption equilibrium;

[0066] 3) Add thioacetamide, wherein the molar ratio of thioacetamide to zinc chloride is 3:1;

[0067] 4) Adjust the pH value of the reaction system to 2, and then react at 80°C for 3 hours under the protection of nitrogen;

[0068] 5) Take out the reacted bacterial cellulose membrane, wash and backwash it with deionized water until neutral, and obtain a bacterial cellulose wet membrane composited with zinc sulfide nanoparticles;

[0069] 6) Perform solvent exchange treatment on the obtained bacterial cellulose ...

Embodiment 3

[0072] The bacterial cellulose film produced by Acetobacter acetogenes was cut into small pieces with a size of 4cm×5cm×0.5cm, placed in a 5% NaOH alkali solution with a mass concentration of 5% and magnetically stirred for 2 hours, and then washed repeatedly with deionized water until medium sex;

[0073] 2) Immerse the bacterial cellulose film in a 0.15mol / L zinc sulfate solution for 16 hours at room temperature and under magnetic stirring until the adsorption equilibrium;

[0074] 3) Add thioacetamide, wherein the molar ratio of thioacetamide to zinc sulfate is 2:1;

[0075] 4) Adjust the pH value of the reaction system to 3, and then react at 70°C for 4 hours under the protection of nitrogen;

[0076] 5) Take out the reacted bacterial cellulose membrane, wash and backwash it with deionized water until neutral, and obtain a bacterial cellulose wet membrane composited with zinc sulfide nanoparticles;

[0077] 6) Perform solvent exchange treatment on the obtained bacterial ...

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Abstract

The invention relates to a bacterial cellulose base optical thin film and a preparation method for the bacterial cellulose base optical thin film, in particular to the bacterial cellulose base optical thin film which is high in thermo-optical stability, transparent and high in refraction index and the preparation method for the bacterial cellulose base optical thin film. Bacterial cellulose is used as a template for in-situ preparation of nanometer zinc sulfide, and then the bacterial cellulose base optical thin film is obtained after the nanometer zinc sulfide is synthesized with epoxy-type optical resin and then solidified. According to the bacterial cellulose base optical thin film and the preparation method for the bacterial cellulose base optical thin film, a nanometer zinc sulfide inorganic phase which is high in refraction index and high in thermo-optical stability is compounded in situ through a bacterial cellulose fine three-dimensional net-shaped structure, the sizes of particle diameters of the nanometer zinc sulfide and the distribution of the nanometer zinc sulfide are effectively controlled, and the refraction index of the optical film is regulated through the fact that the capacity of zinc sulfide nanometer particles is regulated. Due to the fact that the bacterial cellulose resin composite materials are used as the organic matrix of the optical film, high light transparency of resin is reserved, the extremely low coefficient of thermal expansion and excellent mechanical properties of the bacterial cellulose are also possessed, and the bacterial cellulose base optical thin film is wildly applied to the fields of optical wave guide, optical lenses, photovoltaic materials and the like.

Description

technical field [0001] The invention relates to a bacterial cellulose-based optical film and a preparation method thereof, in particular to a transparent high-refractive-index bacterial cellulose-based optical film with high thermal and light stability and a preparation method thereof. Background technique [0002] In the application of modern materials, optical materials are widely used in many fields such as electronics and information. Among optical materials, high refractive index materials have important practical value. High refractive index optical materials can reduce the thickness and curvature of components, and can reduce the weight of materials without affecting their refraction ability, thus making optical instruments lightweight and miniaturized. Therefore, high refractive index optical materials are widely used in many fields such as optical lenses, optical adhesives, optical filters, LED packaging materials, optical waveguides, nonlinear optical materials, h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/10G02B1/00C08L1/02C08L63/00C08K3/30C08J5/18G02B1/111
Inventor 王华平郑威力陈仕艳赵思雨郑羿项草王肖陆川
Owner DONGHUA UNIV
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