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Fabrication method of flexible and stretchable silicone rubber-based wearable strain-sensing fibers

A technology of strain sensing and silicone rubber, which is applied in fiber type, fiber treatment, textiles and papermaking, etc., can solve the problems of high production cost, high content of conductive filler, complicated preparation process, etc., and achieve low cost, high conductivity, The effect of excellent sensing performance

Active Publication Date: 2022-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexible sensing fibers produced in current patents generally have problems such as high conductive filler content, complicated preparation process and high production cost.

Method used

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  • Fabrication method of flexible and stretchable silicone rubber-based wearable strain-sensing fibers
  • Fabrication method of flexible and stretchable silicone rubber-based wearable strain-sensing fibers
  • Fabrication method of flexible and stretchable silicone rubber-based wearable strain-sensing fibers

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preparation example Construction

[0026] A method for preparing a flexible and stretchable silicone rubber-based wearable strain-sensing fiber, comprising the following steps:

[0027] Step 1, use silane coupling agent in toluene solvent protected by nitrogen atmosphere to reflux at 60~100°C for 12~24h to modify the surface of hydroxyl multi-walled carbon nanotubes, vacuum filter and wash, then place in an oven at 60~80°C dry in medium for 3-8 hours to obtain functionalized modified multi-walled carbon nanotubes;

[0028] The silane coupling in step 1 is one of KH550, KH560, and KH570.

[0029] The concentration of the silane coupling agent in the toluene solution in step 1 is 2-8g / L.

[0030] Step 2, take silicone rubber component A (vinyl-terminated polydimethyl-methylvinylsiloxane) and silicone rubber component B (polydimethyl-methylhydrogensiloxane and platinum catalyst), According to the mass ratio of 8:1~12:1, magnetically stir for 10~40min until the mixture is uniform, degas the precursor mixture for ...

Embodiment 1

[0035]Use KH550 silane coupling agent (concentration: 8g / L) in a toluene solvent protected by nitrogen atmosphere at 60°C for 24h at reflux to modify the surface of hydroxyl carbon nanotubes, vacuum filter and wash, then place in an oven at 60°C Dry for 8 hours to obtain functionalized modified multi-walled carbon nanotubes; respectively weigh 5 g of silicone rubber component A (vinyl-terminated polydimethyl-methylvinylsiloxane) and component B (polydimethylvinylsiloxane) base-methylhydrogensiloxane and platinum catalyst) 0.420g magnetic stirring for 10min to mix evenly, degas the precursor mixture in a vacuum oven for 10min until there are no bubbles in the precursor mixture; inject the precursor mixture into a PTFE with an inner diameter of 2mm In a vinyl tube, cure in an oven at 60°C for 3 hours to obtain a transparent, bubble-free and smooth-surfaced silicone rubber fiber; weigh 2g of silicone rubber component A (vinyl-terminated polydimethyl-methylvinylsiloxane) Dissolve ...

Embodiment 2

[0037] Use KH560 silane coupling agent (concentration: 4g / L) in a toluene solvent protected by nitrogen atmosphere at 80°C for 18h at reflux to modify the surface of hydroxyl carbon nanotubes, vacuum filter and wash, then place in an oven at 70°C Dry for 6 hours to obtain functionalized modified multi-walled carbon nanotubes; respectively weigh 5 g of silicone rubber component A (vinyl-terminated polydimethyl-methylvinylsiloxane) and component B (polydimethylvinylsiloxane) base-methylhydrogensiloxane and platinum catalyst) 0.5g magnetic stirring for 20min to mix evenly, degas the precursor mixture in a vacuum oven for 20min until there are no bubbles in the precursor mixture; inject the precursor mixture into a PTFE with an inner diameter of 2mm In a vinyl tube, cure in an oven at 70°C for 2 hours to obtain transparent, bubble-free and smooth silicone rubber fibers; weigh 3g of silicone rubber component A (vinyl-terminated polydimethyl-methylvinylsiloxane) Dissolve in 40mL of ...

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Abstract

A method for preparing flexible and stretchable silicone rubber-based wearable strain sensing fibers, comprising the following steps: using a silane coupling agent to modify the surface of hydroxyl multi-walled carbon nanotubes under the protection of nitrogen atmosphere; injecting silicone rubber into Polytetrafluoroethylene tubes are cured to obtain transparent, bubble-free and smooth silicone rubber fibers; functionalized modified multi-walled carbon nanotubes are dispersed in silicone rubber to obtain a precursor dispersion of functionalized modified multi-walled carbon nanotubes ; The precursor dispersion is coated on the surface of the silicone rubber fiber by dip coating and cured to obtain a low-fill, flexible, stretchable and highly sensitive core-shell structure silicone rubber-based wearable strain sensing fiber, which is variable in resistance Fields such as conductors, artificial intelligence and wearable devices have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer-based nanocomposite materials, and in particular relates to a preparation method of a flexible and stretchable silicon rubber-based wearable strain sensing fiber. Background technique [0002] Strain sensing material is a functional material that can convert external stimuli such as tension, compression, and bending into visible electrical signals. It has good application prospects in human-computer interaction, flexible display screens, artificial intelligence, and wearable electronic devices. Traditional strain sensing materials are usually made of rigid materials such as metals and semiconductor strain gauges. Although they have good sensing performance and responsiveness, they have disadvantages such as complex preparation process, high cost, poor flexibility and wearability. Thus limiting its scope of application. Polymer-based strain sensing materials have the characteristics of good flexib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M15/643D01F8/16D06M101/30
CPCD06M11/74D06M15/643D01F8/16D06M2101/30
Inventor 马忠雷向小莲魏阿静马建中邵亮康松磊张梦辉谌亚茹
Owner SHAANXI UNIV OF SCI & TECH
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