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Wood-base photochromic composite preparation method

A composite material and photochromic technology, applied in the field of preparation of organic photochromic materials, can solve the problem of not having photochromic function, etc., and achieve the effect of fast light response time

Inactive Publication Date: 2013-01-16
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the wood-based composite material prepared by the existing method does not have the photosensitive color-changing function, and provides a preparation method of the wood-based photosensitive color-changing composite material

Method used

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  • Wood-base photochromic composite preparation method

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specific Embodiment approach 1

[0023] Embodiment 1: The preparation method of a kind of wood-based photosensitive color-changing composite material of this embodiment is carried out according to the following steps:

[0024] 1. Polish the wood surface to be smooth, then place the wood in anhydrous acetone, absolute ethanol and deionized water for 5 to 30 minutes of ultrasonic cleaning respectively, and let it dry naturally to obtain the wood matrix;

[0025] 2. Add polyvinyl alcohol powder into deionized water, stir and dissolve it in a water bath at 70-85°C, and prepare an aqueous polyvinyl alcohol solution with a mass percentage of polyvinyl alcohol of 2%-8%;

[0026] 3. Ultrasonic dispersion and dispersion of the organic photochromic material in the polyvinyl alcohol aqueous solution obtained in step 2, to prepare an organic photochromic material / polyvinyl alcohol film-forming liquid with a mass percentage of the organic photochromic material of 2% to 50%;

[0027] 4. Immerse the organic photosensitive c...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that an aqueous polyvinyl alcohol solution with a mass percentage of polyvinyl alcohol of 4% is prepared in Step 2, and other steps and parameters are the same as Embodiment 1.

specific Embodiment approach 3

[0035] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the degree of polymerization of polyvinyl alcohol described in step two is 1700-1800, the degree of alcoholysis is 98%-99%, other steps and parameters It is the same as the specific embodiment 1 or 2.

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Abstract

The invention relates to a photochromic composite preparation method, in particular to a wood-base photochromic composite preparation method which solves the problem that wood-base composites prepared by existing methods lack the photochromic function. The preparation method includes: firstly, polishing wood surface, ultrasonically cleaning, and drying to obtain a wood matrix; secondly, preparing polyvinyl alcohol aqueous solution; thirdly, preparing photochromic materials / polyvinyl alcohol film forming solution; and fourthly, using a full-cell process to impregnate the photochromic materials / polyvinyl alcohol film forming solution into the wood matrix, and drying to obtain the wood-base photochromic composite. The photochromic materials are impregnated to the surface of the wood matrix by means of the vacuum pressurizing full-cell process, and consequently the photochromic materials and the wood matrix are combined more closely while photochromic effects of the wood-base photochromic composite are unaffected. The wood-base photochromic composite preparation method is applicable to production of wood-base photochromic composites.

Description

technical field [0001] The invention relates to a preparation method of an organic photosensitive color-changing material. Background technique [0002] Photosensitive discoloration refers to the change of molecular structure of certain compounds under the action of light of a certain wavelength and intensity, which will lead to the corresponding change of the light absorption peak, that is, the color, and this change is generally reversible. Photosensitive color-changing materials can be roughly divided into two types: organic photosensitive color-changing materials and inorganic photosensitive color-changing materials. At present, spiropyran organic photochromic materials are the most widely used. Under the irradiation of ultraviolet light, the spiro carbon-oxygen bond in the molecular structure will undergo heterocleavage, forming a ring-opened merocyanine compound. At this time, the bond is broken It is easy to produce conjugation phenomenon, the conjugated structure st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/50B27K5/04
Inventor 李国梁李雷鸿李坚
Owner NORTHEAST FORESTRY UNIVERSITY
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