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Preparation method of nano silver wire-chitosan self-assembly conductive film coating

A technology of nano-silver wire and conductive film, which is applied in the intersecting field of material science and nanotechnology, and can solve the problem of poor stability of nano-silver wire coating process, loss of conductivity, and easy peeling of nano-silver wire coating by surrounding fluids, etc. question

Inactive Publication Date: 2018-04-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of silver nanowire composites in the field of biology still faces great challenges
The main reason is: the stability of the existing nano-silver wire coating process is not good. In the biological microenvironment, the nano-silver wire coating is easily peeled off by the surrounding fluid and loses conductivity.

Method used

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  • Preparation method of nano silver wire-chitosan self-assembly conductive film coating
  • Preparation method of nano silver wire-chitosan self-assembly conductive film coating
  • Preparation method of nano silver wire-chitosan self-assembly conductive film coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Self-assembled silver nanowires on cellulose film substrate.

[0018] Prepare 10mg / ml chitosan solution and 0.1mg / ml nano silver wire solution. First immerse the cellulose film in the chitosan solution for 5 minutes, then immerse in deionized water to wash away the unbound chitosan on the cellulose film, then immerse in the nano-silver wire solution for 5 minutes, and wash away the unbound chitosan with deionized water. Silver nanowires on cellulose membrane. Repeat this process 3 times. Using a scanning electron microscope to observe cellulose films containing different layers of nano-silver wires, it can be clearly seen that as the number of nano-silver wires increases, the number of nano-silver wires bound to the cellulose film increases, and the distribution more uniform, such as figure 2 . By measuring the resistance value of the cellulose film containing different nano-silver wire layers, the more the number of layers is, the smaller the measured resistance v...

Embodiment 2

[0020] Self-assembled silver nanowires on glass substrates.

[0021] Prepare 15mg / ml chitosan solution and 0.5mg / ml nano silver wire solution. First immerse the glass piece in the chitosan solution for 10 minutes, then immerse in deionized water to wash off the unbound chitosan on the glass piece, then immerse in the nano silver wire solution for 10 minutes, wash off the unbound chitosan on the glass piece with deionized water on the silver nanowires. Repeat this process 5 times. The glass sheet containing the self-assembled nano-silver wire coating was immersed in a plate containing water, placed on a shaker and shaken for 48 hours, and no nano-silver wire coating was found to fall off.

Embodiment 3

[0023] Self-assembled silver nanowires on PDMS substrate.

[0024] Prepare 20mg / ml chitosan solution and 0.5mg / ml silver nano wire solution. First immerse the glass piece in the chitosan solution for 15 minutes, then immerse in deionized water to wash off the unbound chitosan on the glass piece, then immerse in the nano-silver wire solution for 15 minutes, wash off the unbound chitosan on the cellulose film with deionized water on the silver nanowires. After repeating this process 4 times, the PDMS material containing nano-silver wire coating was prepared.

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Abstract

The invention provides a preparation method of a nano silver wire-chitosan self-assembly conductive film coating. According to the method, a layer-by-layer self-assembly method is utilized to combinenano silver wires with a chitosan coating on the surface of a substrate material for forming a conductive film with high stability. Through the multi-layer self-assembly, the uniform distribution degree of the nano silver wires on the substrate material can be enhanced, and meanwhile, the conductivity of the conductive film can be improved. The method can be used to prepare the nano silver wire conductive film coating with high stability on the surface of a plurality of substrate materials.

Description

technical field [0001] The invention belongs to the intersecting field of material science and nanotechnology, in particular to a method for preparing a nano silver wire-chitosan self-assembled conductive film coating. Background technique [0002] In recent years, nano silver wire thin film materials based on nanotechnology have attracted increasing attention from academia and industry due to their superior performance characteristics and low-cost preparation process. Compared with other conductive materials, nano-silver wire has a high specific surface area and an efficient conductor (surface resistance<30Ω / sq). With the increase of silver wire concentration and coating thickness, its surface resistance value can be greatly reduced and the light transmittance of the material can be maintained. (transparency>85%); in addition, the preparation process is relatively simple, can be prepared into various forms such as film, and has cost advantages. Although silver is a p...

Claims

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Application Information

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IPC IPC(8): C08J7/04C03C17/38C03C17/36C08L1/18C08L83/04
CPCC03C17/3644C03C17/3668C03C17/38C08J7/0423C08J2301/18C08J2383/04C08J2405/08
Inventor 秦建华魏文博
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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