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Carbon nano tube-polyurethane composite smart film and preparation method thereof

A technology of carbon nanotube film and dimming film, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of high cost and achieve the effect of low cost, simple structure and wide market demand prospect

Inactive Publication Date: 2011-02-09
苏州工业园区维龙树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these two main raw materials are expensive, so that the price of electronically controlled dimming glass in the domestic market is no less than several thousand yuan per square meter, and the price of imported products is far beyond the range of ordinary people.

Method used

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  • Carbon nano tube-polyurethane composite smart film and preparation method thereof
  • Carbon nano tube-polyurethane composite smart film and preparation method thereof
  • Carbon nano tube-polyurethane composite smart film and preparation method thereof

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preparation example Construction

[0037] Of course, the above is only a superficial introduction to the preparation method of the composite dimming film, which further includes the initial selection and cleaning of the transparent base medium 11 as the substrate, and the shape memory polyurethane film before covering the carbon nanotube film. Heating to make it have a certain viscosity and other steps. In addition, in the above-mentioned steps of the preparation method of the present invention, there are further multiple preferred solutions, which are described in detail as follows:

[0038] First: The substrate used or the upper and lower transparent base media of the opposite substrate can be glass, plastic, rubber, etc. If glass is used as the transparent base medium, the composite dimming film has a rigid structure, and the finished product has high anti-damage and anti-corrosion performance, and is easy to prolong the service life; if soft transparent plastic or rubber such as transparent PET is used as t...

Embodiment 1

[0044] Such as figure 2 Shown is a schematic flow chart of a preparation example of carbon nanotube-polyurethane composite dimming film of the present invention, which includes the following steps:

[0045] Step 1, fully dissolving shape memory polyurethane (English abbreviation: SMPU) in N-methylpyrrolidone (NMP) to form a solution 21 with a concentration of 10%.

[0046] Step 2: Take a certain amount of SMPU / NMP solution 21 and slowly coat it on the pre-treated transparent glass slide (that is, the transparent base medium) to form a uniform and smooth liquid film on the surface of the glass slide. Finally, put the slide glass coated with the polyurethane solution into a blast drying oven, dry at 70°C for 48 hours, and then raise the temperature to 110°C for 24 hours.

[0047] Step 3, trimming the edge height of the SMPU film in the sample in step 2.

[0048] Step 4, place the SMPU / glass slide obtained in step 3 on a heating platform, and when the surface of the SMPU becom...

Embodiment 2

[0051] Fully dissolve SMPU in DMF (N, N-dimethylformamide) to form a saturated solution; add the required pigments (blue, brown, etc., see Figure 3) to the saturated solution, stir and mix evenly; Take a small amount of mixed solution and apply it on the surface of transparent PET film to form a flat and uniform liquid film; then put it in a blast drying oven at 70°C and dry it for 72 hours; take out the dried sample and simply modify the surface; In the state, the surface of the colored polyurethane is covered with a carbon nanotube film, terminal electrodes, and an upper transparent substrate—a transparent PET film in sequence; finally, the sample is fixed to obtain a colored flexible electroluminescent film.

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Abstract

The invention relates to a carbon nano tube-polyurethane composite smart film and a preparation method thereof. The composite smart film comprises main components of a carbon nano tube self-supporting film and shape memory polyurethane, and the phase conversion of a polyurethane-layer molecular structure in the film and the reversible modulation of transparency are realized in an electric drive mode. The smart film material can be freely converted between full transparency and frosted dimming by controlling different voltage signals. Meanwhile, several pigments are added, so corresponding colorful smart films can be obtained. The technology is easy for large-scale production, and is expected to be a novel processing method for dimming glass; and the product has the advantages of simple structure, low cost, durability, low threshold voltage and high safety, can be widely applied to decorative materials for automobiles and buildings, can be developed into a novel transparent flexible smart conductive film, and lays a material foundation for developing smart devices.

Description

technical field [0001] The invention relates to an optical film and its preparation method, in particular to an optical dimming film with a composite layered structure and its preparation method. It has important potential applications in the fields of high-grade doors and windows, automobile glass, toilets and indoor and outdoor decoration, and belongs to carbon Nanotube smart thin film materials and related technical fields. Background technique [0002] The development of functional glass materials has a significant impact on interior decoration technology and changes in the living environment. In order to prevent strong ultraviolet radiation, people often use curtains, or paste window paper or coating on the glass to achieve. But these two shading methods are relatively monotonous, and the curtains are easy to stick to dust and get dirty, so they need to be washed and replaced regularly. It is also difficult to freely adjust the light and shade of the light entering th...

Claims

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Application Information

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IPC IPC(8): C08L75/04G02F1/15G02F1/153
Inventor 孟凡成李清文陈名海
Owner 苏州工业园区维龙树脂有限公司
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