Infrared light transmission sandwich structure composite material based on silver dendritic structure

A composite material and dendritic technology, applied in the field of infrared light-transmitting composite materials and their preparation, can solve the problems of damage to the structure and morphology, high preparation cost, and difficulty in separation.

Inactive Publication Date: 2009-07-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former method is expensive to prepare, and the scale of the prepared structure is too small to overcome the photolithography limit, while the metal dendritic structures prepared by the latter method are mostly dispersed in the solution system, and it is difficult to separate them. It is not easy to assemble it into an application device, even if it is separated, it is easy to destroy its structure and shape due to agglomeration

Method used

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  • Infrared light transmission sandwich structure composite material based on silver dendritic structure
  • Infrared light transmission sandwich structure composite material based on silver dendritic structure
  • Infrared light transmission sandwich structure composite material based on silver dendritic structure

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preparation example Construction

[0020] 1. Preparation of silver dendritic structure: adopt chemical electrodeposition method, with indium tin oxide (ITO) transparent conductive glass as cathode, with smooth surface, the silver sheet that purity is 99.9% is anode, the distance between two flat electrodes is 0.6mm. AgNO at a concentration of 0.589mM 3 The ultra-pure aqueous solution is the electrolyte, and it is energized at a DC voltage of 0.4-0.8V for 1 minute, and the cell diameter is 0.5-6.5μm and the distribution density is 5.76×10 on the conductive glass substrate. 4 —4.58×10 5 piece / mm 2 nanobranched silver dendrites.

[0021] 2. Preparation of PVA film: Utilizing the principle of vertically pulling the coating film, using a self-designed liquid level drop coating device, using 3% (w / v) PVA ultra-pure aqueous solution as the coating liquid, at room temperature 25 ° C, Hang the sample with silver dendritic structure deposited in the coating liquid, adjust the falling speed of the coating liquid to 0....

Embodiment 1

[0025] Embodiment 1: In the process of preparing the silver dendritic structure, a flat conductive glass with a square resistance of 17Ω was cut and cleaned according to the specification of 8 mm×4 mm by chemical electrodeposition method, and used as a cathode. A silver sheet (purity of 99.9%) with the same size specification as the cathode and a flat surface is used as the anode. Two plate electrodes are attached figure 2 The device shown is separated by two sheets of polyvinyl chloride with a thickness of 0.6 mm, so that the distance between the two electrodes is maintained at 0.6 mm. Accurately weigh 500mg AgNO 3 (analytical pure) into a 50ml volumetric flask, then add ultrapure water with a resistivity of 18.24MΩ-cm to the scale, this solution is used as the electrolyte mother solution; use a 1ml pipette to accurately measure 1ml and add 100ml of capacity bottle, and then diluted to the mark with the same ultrapure water, this solution is the electrolyte solution, and i...

Embodiment 2

[0027] Embodiment 2: In the process of preparing the PVA film, a self-designed liquid level drop coating device is used to coat the PVA film on the surface of the silver dendritic structure prepared according to the conditions of Example 1. Accurately weigh 7.5g of polyvinyl alcohol (analytically pure) into a 250ml beaker, add 250ml of ultrapure water, stir and heat until boiling, stop heating after the polyvinyl alcohol is completely dissolved, and transfer the solution to a 250ml volumetric flask after cooling to room temperature , add ultrapure water to the scale (part of the water is evaporated when heated and dissolved), and then the coating solution (3% PVA ultrapure aqueous solution) used for the coating film is obtained. Add the coating liquid as image 3 In the glass container (capacity is 250ml) on the upper part of the film coating device shown, and then the sample is pressed image 3 Hang in the coating liquid as shown, adjust the liquid discharge valve, control t...

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Abstract

The invention relates to infrared light transmission sandwich structure composite material based on a silver dendritic structure, in particular to the sandwich structure composite material which is prepared by the following steps: firstly preparing the randomly arranged silver dendritic structure on a conductive glass substrate through a chemical electrodeposition method; then coating a PVA thin film on the surface of the prepared silver dendritic structure through a liquid level coating method; and then laminating, gluing and sealing the silver dendritic structure coated with the PVA thin film with another silver dendritic structure which is not coated with the PVA thin film. The composite material has the multiband transmission characteristic in the infrared band wavelength range from 1.2 to 2.8mu m.

Description

technical field [0001] The invention relates to an infrared light-transmitting composite material and a preparation method thereof, in particular to a composite material with multi-band transmission behavior in the infrared band based on disordered arrangement of nano-branched silver dendritic structural units and polyvinyl alcohol (PVA) film Sandwich structure composite material and its preparation method. Background technique [0002] Ordered metal nanostructures have attracted a lot of research and attention in terms of preparation, performance, and applications due to their unique optical, electrical, magnetic, catalytic, and sensing properties. However, due to the high cost of preparation of this structure, the complex and difficult-to-control preparation process, and the difficulty in obtaining it in a large area, this greatly limits the wide application of this ordered metal nanostructure material in various fields. The disordered metal nanostructure overcomes the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34C25D9/08
Inventor 赵晓鹏刘宝琦骆伟邓巧平
Owner NORTHWESTERN POLYTECHNICAL UNIV
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