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Self-healing sensing high molecular composite material based on ordered conductive network structure, and preparation method thereof

A composite material and network structure technology, applied in the field of sensing materials, can solve the problems of insufficient sensitivity, inability to apply sensing, and low resistance change, and achieve the effects of good conductivity, simple preparation method, and large resistance change rate.

Inactive Publication Date: 2018-09-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when silver nanowires are introduced into polymer materials, although the conductivity is good, there are problems such as low resistance change and insufficient sensitivity, which cannot be applied to practical sensing.
Therefore, it is necessary to design a new conductive network, including replacing nano-conductive materials or designing its structure; however, there are few research reports on the application of the ordered arrangement of silver nanowires to flexible sensing devices.

Method used

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  • Self-healing sensing high molecular composite material based on ordered conductive network structure, and preparation method thereof
  • Self-healing sensing high molecular composite material based on ordered conductive network structure, and preparation method thereof
  • Self-healing sensing high molecular composite material based on ordered conductive network structure, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add the aqueous solution of 10mg / ml silver nanowires into the chloroform solution drop by drop at the glass wall. After the orientation of the silver nanowires is completed, take out the ordered silver nanowires with a 10×25mm glass sheet to obtain Ordered silver nanowire conductive film with a mass of 1.56 mg, the specific process is as follows figure 1 shown.

[0031] (2) Mix polycaprolactone and polyurethane respectively dissolved in N,N dimethylacetamide, the total mass of the polymer mixture is 30mg, of which polycaprolactone accounts for 30%, stir for 0.5h, and then drop-coat Or spin-coat on the above-mentioned ordered silver nanowire conductive film, put it in a 70°C oven and heat it for 12 hours, and then put it in a vacuum drying oven for 12 hours in vacuum to obtain a self-healing sensor based on an ordered conductive network structure. polymer composites. The morphology of the material was observed with a scanning electron microscope, such as figure 2...

Embodiment 2

[0034] (1) Add the aqueous solution of 10mg / ml silver nanowires into the chloroform solution drop by drop at the glass wall. After the orientation of the silver nanowires is completed, take out the ordered silver nanowires with a 10×25mm glass sheet to obtain A conductive film of ordered silver nanowires with a mass of 0.64 mg.

[0035] (2) Mix polycaprolactone and polyurethane respectively dissolved in N,N dimethylacetamide, the total mass of the polymer mixture is 30mg, of which polycaprolactone accounts for 30%, stir for 0.5h, and then drop-coat or Spin-coated on the above-mentioned ordered silver nanowire conductive film, put it into a 70°C oven for heating for 12 hours, and then put it in a vacuum drying oven for 12 hours to vacuum dry to obtain a self-healing sensor sensor based on an ordered conductive network structure. molecular composites.

[0036] (3) Cut the self-healing sensing polymer composite material into a sample whose length*width*thickness is 25mm*5mm*0.05...

Embodiment 3

[0038] (1) Add the aqueous solution of 10mg / ml silver nanowires into the chloroform solution drop by drop at the glass wall. After the orientation of the silver nanowires is completed, take out the ordered silver nanowires with a 10×25mm glass sheet to obtain A conductive film of ordered silver nanowires with a mass of 2.37mg.

[0039] (2) Mix polycaprolactone and polyurethane respectively dissolved in N,N dimethylacetamide, the total mass of the polymer mixture is 30mg, of which polycaprolactone accounts for 30%, stir for 0.5h, and then drop-coat or Spin-coated on the above-mentioned ordered silver nanowire conductive film, put it into a 70°C oven for heating for 12 hours, and then put it in a vacuum drying oven for 12 hours to vacuum dry to obtain a self-healing sensor sensor based on an ordered conductive network structure. molecular composites.

[0040] (3) Cut the self-healing sensing polymer composite material into a sample whose length*width*thickness is 25mm*5mm*0.05m...

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Abstract

The invention discloses a self-healing sensing high molecular composite material based on an ordered conductive network structure, and a preparation method thereof. According to the preparation method, interface self assembling is adopted for ordered arrangement of silver nano wires and construction of ordered silver nano wire conductive film; self-healing polycaprolactone and shape memory polyurethane are uniformly blended so as to obtain a high molecular solution, layered mixing is adopted for drop coating or spin coating of the high molecular solution onto the surface of the ordered silvernano wire conductive film; heating treatment is carried out so as to remove an organic solvent, and peeling is carried out so as to obtain the self-healing sensing high molecular composite material based on an ordered conductive network structure. The preparation method is simple; the obtained self-healing sensing high molecular composite material is excellent in conductivity; compared with disordered silver nano wire composite materials, the self-healing sensing high molecular composite material possesses following advantages: the resistance change response time is short, resistance change rate is larger, and conductivity and self-healing effect are achieved at the same time.

Description

technical field [0001] The invention relates to the field of sensing materials, in particular to a self-healing sensing polymer composite material based on an ordered conductive network structure and a preparation method thereof. Background technique [0002] Materials play an important role in human production and life, and new materials also promote scientific progress. In recent years, various excellent special functional materials have emerged one after another, especially flexible electronic devices. Due to the shortcomings of traditional electronic devices such as fragility and high cost, flexible electronic devices have the performance of flexibility, ductility and low cost, which has attracted widespread attention from all over the world and has been developed rapidly. [0003] Silver nanomaterials have unique optical, mechanical and catalytic properties, especially as one-dimensional nanomaterials, silver nanowires have the characteristics of high electrical conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L67/04C08K7/06C08J5/18
CPCC08J5/18C08J2367/04C08J2375/04C08K7/06C08K2201/001C08K2201/011
Inventor 罗洪盛周洹楷张怡杭易国斌周兴东王华权
Owner GUANGDONG UNIV OF TECH
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