Flexible force-sensitive sensor based on silver-embedded nanofibers and preparation method thereof

A nanofiber and nanofiber membrane technology, applied in the field of sensors, can solve the problems of uneven distribution of silver nanoparticles, difficult to obtain spinning precursor liquid, uneven diameter of nanofibers, etc., and achieves superior electrical performance, simple preparation method and distribution. uniform effect

Active Publication Date: 2017-11-14
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of material properties and preparation process, the research on flexible electronic devices based on pressure sensors is less, and the electronic skin with both flexibility and antibacterial properties on the skin is still blank.
The polymer material micro-nanofiber membrane prepared by electrospinning method has good flexibility, and the composite nanofiber prepared by doping conductive material particles into the electrospinning precursor has certain electrical conductivity, and has potential in flexible sensors. Application prospects, especially silver nanoparticles with antibacterial and conductive dual functions, composite fibers obtained by usi

Method used

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  • Flexible force-sensitive sensor based on silver-embedded nanofibers and preparation method thereof
  • Flexible force-sensitive sensor based on silver-embedded nanofibers and preparation method thereof
  • Flexible force-sensitive sensor based on silver-embedded nanofibers and preparation method thereof

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Embodiment 1

[0031] A flexible force-sensitive sensor based on silver-loaded nanofibers, including a flexible force-sensitive resistor film, the flexible force-sensitive resistor film is connected in series with a power supply and an ammeter, and the flexible force-sensitive resistor film includes a silver-loaded nanofiber film, and Covering the elastic protective film on the upper and lower surfaces of the silver-loaded nanofiber membrane, the two ends of the silver-loaded nanofiber membrane are respectively connected to wires, and the silver-loaded nanofiber membrane is composed of alginic acid / silver nanoparticle composite nanofibers. The described alginic acid / silver nanoparticle composite nanofiber is sodium alginate nanofiber prepared by electrospinning method, and silver alginate nanofiber is obtained through ion exchange, and then reduced silver ion is obtained, and described alginic acid / The inner and outer surfaces of the silver nanoparticle composite nanofiber are uniformly dist...

Embodiment 2

[0039] A flexible force-sensitive sensor based on silver-loaded nanofibers, its structure is similar to the flexible force-sensitive sensor of embodiment 1, the difference is that the preparation method of the flexible force-sensitive sensor comprises the following steps:

[0040] (1) Electrospun sodium alginate nanofiber: at room temperature, weigh 0.64g of sodium alginate powder, add it to the container, then add 0.16g polyethylene oxide PEO, 0.4g triton, 2g dimethylmethylene Sulfone, 36.8g deionized water, stirred at room temperature for 3h to obtain the spinning precursor solution, injected the spinning precursor solution into the electrospinning device, prepared sodium alginate nanofibers by electrospinning, spinning voltage 12kV, spinning The distance is 15cm, the spinning time is 25min, the sodium alginate nanofibers obtained by electrospinning are placed in an oven and dried in an oven at 50°C for 2h, and the obtained fiber membrane is cut into 2×2cm 2 small pieces of ...

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Abstract

The invention discloses a flexible force-sensitive sensor based on silver-embedded nanofibers and a preparation method thereof. The sensor comprises a flexible force-sensitive resistance film which is connected to a power supply and a current meter in series. The flexible force-sensitive resistance film comprises a silver-embedded nanofiber film which is formed by alginate/silver nanoparticle composite nanofibers. The alginate/silver nanoparticle composite nanofibers are sodium alginate nanofibers prepared by an electrostatic spinning method, alginate silver nanofibers are made through ion exchange, and the alginate/silver nanoparticle composite nanofibers are obtained through reduction of silver ions. The sensitive resistor of the sensor has good flexibility and can be directly adhered to a skin, the skin is not hurted, the temperature performance and sensitivity are good, and the monitoring of physiological activities such as a pulse, a breathing frequency and a heartbeat can be realized. At the same time, the sensor also has an antibacterial effect and is more safe to directly contact with the skin.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to a flexible force-sensitive sensor based on silver-loaded nanofibers and a preparation method thereof. Background technique [0002] Due to the urgent needs of modern society for health monitoring, human-computer communication, and detection of pressure distribution, flexible pressure sensors based on the working principle of pressure sensors have become an emerging research hotspot. At present, the application of pressure sensors is not limited to water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military industry, petrochemical, ships, machine tools, pipelines and other industrial production. There is also a great demand in sports health care, that is, the detection of exercise status, respiratory conditions, and health indicators. With the development of society, the miniaturization of electronic devices has be...

Claims

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Application Information

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IPC IPC(8): G01L1/22A61B5/00D06M11/83D01F8/18D01F8/10D01F1/10
CPCA61B5/6833D01F1/10D01F8/10D01F8/18D06M11/83G01L1/22
Inventor 龙云泽胡伟鹏张斌王晓雄张俊罗维玲张志广
Owner QINGDAO UNIV
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