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Preparation method of field-sensitive nonlinear conductive film, prepared film and application

A conductive film and nonlinear technology, which is applied in the field of field-sensitive nonlinear conductive film preparation, can solve problems such as damage and lower working voltage, and achieve the effects of low experimental environment requirements, easy operation, and good dispersion

Active Publication Date: 2019-01-11
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Operating voltages for these increasingly powerful and sensitive electronic devices are decreasing, increasing the potential for damage from transient overvoltages, lightning surges, and electrostatic discharge transients

Method used

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  • Preparation method of field-sensitive nonlinear conductive film, prepared film and application
  • Preparation method of field-sensitive nonlinear conductive film, prepared film and application
  • Preparation method of field-sensitive nonlinear conductive film, prepared film and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a field-sensitive nonlinear conductive film, comprising the steps of:

[0042] (1) First, take 0.2g of PVP and add 25ml of EG, stir magnetically for 4-5 hours until completely dissolved to obtain mixed solution A.

[0043](2) Then take 0.25g AgNO 3 Add solution A, magnetically stir for about 1 h until completely dissolved to obtain a homogeneous solution B.

[0044] (3) Preparation of FeCl with a concentration of 600 μmol / L 3 / EG solution, and take 3.5ml FeCl 3 Add the / EG solution to solution B, and continue magnetic stirring for about 5 minutes until the solution is uniform to obtain solution C.

[0045] (4) Pour solution C into a 250ml round-bottomed flask, place it in a silicone oil bath at 130°C and heat for 5 hours. During the reaction, the light yellow solution gradually turns into light brown until milky white suspension D is formed. After the milky white suspension D is naturally cooled to room temperature, take it out and pour it int...

Embodiment 2

[0049] A method for preparing a field-sensitive nonlinear conductive film, comprising the steps of:

[0050] Front (1)-(5) are synchronous with embodiment 1.

[0051] (6) First weigh 5g of PVA (the degree of polymerization is 1700, and the degree of alcoholysis is 99%) and 90ml of deionized water are placed in a round-bottomed flask, and magnetically stirred for half an hour at room temperature to volatilize impurities and fully swell the PVA to Avoid endothelial growth during lysis. Then increase the temperature, heat the deionized water to 90°C, and continue to stir for about 1.5h until the PVA is completely dissolved. At this time, add 8 parts of AgNWs prepared in step (5) (among them, 1 part of AgNWs prepared in step (5) Refers to the AgNWs generated by the above steps (1)-(5) per 0.2g of PVP is referred to as 1 part), and the temperature is adjusted to 65 ° C for 10 hours to obtain a composite material fluid with a certain viscosity, the fluid Pour into a flat, clean Pe...

Embodiment 3

[0053] A method for preparing a field-sensitive nonlinear conductive film, comprising the steps of:

[0054] Front (1)-(5) are synchronous with embodiment 1.

[0055] (6) First weigh 5g of PVA (the degree of polymerization is 1700, and the degree of alcoholysis is 99%) and 90ml of deionized water are placed in a round-bottomed flask, and magnetically stirred for half an hour at room temperature to volatilize impurities and fully swell the PVA to Avoid endothelial growth during lysis. Then increase the temperature, heat the deionized water to 90°C, and continue to stir for about 1.5h until the PVA is completely dissolved. At this time, add 12 parts of AgNWs prepared in step (5) (among them, 1 part of AgNWs prepared in step (5) Refers to the AgNWs generated by the above steps (1)-(5) per 0.2g of PVP is referred to as 1 part), and the temperature is adjusted to 65 ° C and continued to stir for 15 hours to obtain a composite material fluid with a certain viscosity, the fluid Pou...

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Abstract

The invention discloses a preparation method of a field-sensitive nonlinear conductive film, a prepared film and an application and relates to the field of conductive film materials. The preparation method comprises the following steps: stirring polyvinyl alcohol and deionized water at normal temperature, heating to the temperature of 85-95 DEG C, continuously stirring until the polyvinyl alcoholis completely dissolved so as to obtain a solution E; and adding silver nanowire into the solution E, and stirring at the temperature of 60-70 DEG C for 10-15 hours so as to obtain a composite material fluid, performing film casting, and volatilizing the solvent, thereby obtaining the field-sensitive nonlinear conductive film, wherein the polymerization degree of the polyvinyl alcohol is 1700, thealcoholysis degree is 99%, the silver nanowire length is 10-14 microns, the diameter is 80-120nm, and the draw ratio L / r is 80-350; and the AgNWs packed volume fraction in the field-sensitive nonlinear conductive film is 1.05-2.44%. The method is simple in process, low in cost, short in reaction time and capable of realizing large-scale preparation; and the prepared film is uniform in distribution, excellent in dispersion property and aggregation-free, has very obvious nonlinear conductivity, and can be applied to the adaptive protection field of overvoltage protection, lightning surge and electrostatic discharge.

Description

technical field [0001] The invention relates to the field of conductive thin film materials, in particular to a method for preparing a field-sensitive nonlinear conductive thin film, the prepared thin film and its application. Background technique [0002] With the development of science and technology, the application of advanced electronic equipment is becoming more and more extensive: electronic medical diagnosis system, communication system, industrial automation integrated control system, computer network and so on. These ever more powerful and sensitive electronic devices operate at ever lower voltages, increasing their potential for damage from transient overvoltages, lightning surges, and electrostatic discharge transients. Low-voltage conductive switch materials with highly nonlinear conductive properties can be used for instantaneous overvoltage protection. This material exhibits insulating properties under the allowable operating voltage environment, and when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C41/16B29K29/00B29K105/00B29K305/00B29L7/00
CPCB29C41/003B29C41/16B29K2029/04B29K2105/002B29K2305/14B29L2007/00
Inventor 曲兆明卢聘王庆国赵世阳
Owner ARMY ENG UNIV OF PLA
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