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Tri-shape shape memory conductive polymeric nanocomposite and preparation method thereof

A nano-composite material, conductive polymer technology, applied in conductive coatings, nanotechnology for materials and surface science, nanotechnology and other directions, can solve the problem of conductive materials not having simultaneous induction, electrical properties changes, etc., to improve the extension Sexual, selective and easy-to-operate effects

Inactive Publication Date: 2017-04-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The materials on the market today basically have only one shape memory, and conductive materials do not have the ability to simultaneously sense changes in two different temperatures to change their electrical properties.

Method used

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  • Tri-shape shape memory conductive polymeric nanocomposite and preparation method thereof
  • Tri-shape shape memory conductive polymeric nanocomposite and preparation method thereof
  • Tri-shape shape memory conductive polymeric nanocomposite and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0037] The preparation method includes the following steps: the conductive nano network structure is embedded in the upper surface layer through a transfer process; wherein, the composite surface layer provides electronic pathways, and the polymer substrate provides flexibility, mechanical properties and shape memory properties; Blending or chemical synthesis design polymer structure to obtain two thermal transition temperatures T1 and T2, after excipient treatment, two thermal transitions at different temperatures lead to three-shape deformation recovery. Wherein, the differential scanning calorimetry curve (DSC) of polymer material tests the glass transition temperature Tg of this polymer composite material 1 and Tg 2 like figure 2 Shown; The shape recovery of polymer composites with three-shape shape memory function is as follows image 3 shown.

[0038] Further, stretching and deformation at a higher temperature and cooling to a fixed shape, the resistance changes from...

Embodiment 1

[0046] Take nano-silver wire ethanol solution 3ml (concentration 1mg / ml), evenly drop-coat it on the glass substrate, dry it naturally to form a dense conductive film. Dissolve 200mg of polyurethane in 4ml of N,N dimethylacetamide, stir at an oil bath temperature of 70°C for 12 hours to obtain a blended solution, then spread the blended solution evenly on the conductive film, and heat it in an oven at 70°C dry in medium for 12 hours, and finally continue vacuum drying at 60° C. for 24 hours to obtain a conductive polymer nanocomposite material with a three-shape shape memory function containing polycaprolactone with a mass content of 0%.

[0047] The size of the conductive polymer nanocomposite material with double-switch three-shape shape memory function in this embodiment is 30mm*5mm, the resistance is 3 ohms, 100% stretched at 70°C, fixed at 10°C, the length of the film becomes 60mm, the resistance becomes 79 ohms, when the temperature rises to 30°C, the length of the film ...

Embodiment 2

[0049] Take nano-silver wire ethanol solution 3ml (concentration 1mg / ml), evenly drop-coat it on the glass substrate, dry it naturally to form a dense conductive film. 40mg of thermoplastic polycaprolactone and 160mg of polyurethane were dissolved in 4ml of N,N dimethylacetamide, stirred at an oil bath temperature of 70°C for 12 hours to obtain a blended solution, and then the blended solution was evenly spread on On the conductive film, dry in an oven at 70°C for 12 hours, and finally continue to dry in vacuum at 60°C for 24 hours to obtain a conductive polymer nanocomposite material with a three-shape shape memory function containing polycaprolactone with a mass content of 20%.

[0050] The size of the conductive polymer nanocomposite material with double-switch three-shape shape memory function in this embodiment is 30mm*5mm, the resistance is 3 ohms, 100% stretched at 70°C, fixed at 10°C, the length of the film becomes 60mm, the resistance becomes 91 ohms, when the tempera...

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Abstract

The invention discloses a tri-shape shape memory conductive polymeric nanocomposite and a preparation method thereof. The composite contains a biswitch tri-shape shape memory polymeric and nanoconductive material and can sense remarkable change of electrical properties at two different temperature changes. The preparation method comprises the following steps: a conductive nanometer network is embedded into the upper surface layer through a transfer technology, wherein the composite surface layer provides an electronic channel and a polymer substrate provides flexibility, mechanical properties and shape memory performance; through physical blending or chemical synthesis of polymer for design of the polymeric structure, two transformation temperatures T1 and T2 are obtained; and after forming treatment, two thermal transformations at different temperatures are conducted so as to lead to tri-shape deformation recovery.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a conductive polymer nanocomposite material with a three-shape shape memory function and a preparation method thereof. Background technique [0002] Shape Memory Polymer (Shape Memory Polymer) material is a class of intelligent materials that can respond to external stimuli. Under the stimulus, it will produce perception, and make corresponding adjustments so that it will eventually return to the original shape. Shape memory polymer has many advantages such as large deformation, easy shaping, easy processing, adjustable response, light weight, low price, and rich variety. Therefore, this type of material is widely used in intelligent sensing, biomedical, aerospace, and smart textile , self-repair and other fields have broad application prospects. [0003] But at present, most shape memory polymers belong to ordinary shape memory polymer materials. Ordinary shape memor...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D167/04C09D5/24H01B1/04B82Y30/00B82Y40/00C03C17/38
CPCB82Y30/00B82Y40/00C03C17/3668C03C17/38C03C2217/256C03C2218/11C03C2218/32C08K7/06C08K2201/011C08L2201/08C08L2201/12C09D5/24C09D167/04C09D175/04H01B1/04C08L67/04C08L75/04
Inventor 王华权罗洪盛周兴东易国斌李韵捷张怡杭曾琳惠李杰栋
Owner GUANGDONG UNIV OF TECH
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