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Novel ionic capacitive pressure and temperature sensing fiber device capable of being manufactured in batches and preparation method of novel ionic capacitive pressure and temperature sensing fiber device

A technology of capacitive sensors and sensing fibers, which is applied in the direction of using electric/magnetic devices to transfer sensing components, fiber processing, instruments, etc., can solve the problems of cumbersome production process, difficult batch production, high production cost, etc., and achieve excellent electrical conductivity , low mass production and low cost

Pending Publication Date: 2022-07-05
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to solve the technical problems of poor air permeability, cumbersome production process, high production cost, and difficulty in mass production of existing ion-type capacitive sensors, and to provide an ion-type capacitive sensor that can be mass-produced. Fabrication method of sensing fiber device

Method used

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  • Novel ionic capacitive pressure and temperature sensing fiber device capable of being manufactured in batches and preparation method of novel ionic capacitive pressure and temperature sensing fiber device
  • Novel ionic capacitive pressure and temperature sensing fiber device capable of being manufactured in batches and preparation method of novel ionic capacitive pressure and temperature sensing fiber device
  • Novel ionic capacitive pressure and temperature sensing fiber device capable of being manufactured in batches and preparation method of novel ionic capacitive pressure and temperature sensing fiber device

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Experimental program
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Effect test

Embodiment 1

[0064] 5 g of thermoplastic polyurethane (TPU) was added to the solvent DMF, and after stirring, a uniform TPU solution with a mass fraction of TPU of 20% was obtained.

[0065] The TPU solution was left to stand for 30min, degassed, and distilled water were placed in two 10ml syringes, and were connected to the same coaxial two-channel needle (needle model is 18G / 14G) through a polytetrafluoroethylene tube. The polytetrafluoroethylene tube connected to the syringe of distilled water is connected to the inner channel of the coaxial two-channel needle, and the polytetrafluoroethylene tube connected to the syringe containing the TPU solution is connected to the outer channel of the coaxial two-channel needle. Injection speed, the TPU solution and distilled water were injected into a coagulation bath containing distilled water, after soaking for 12 hours, the formed fibers were placed in an environment below minus 20 °C for 2 hours, and then freeze-dried for 6 hours to obtain holl...

Embodiment 2

[0069] 4 g of styrene-based elastomer (SEBS) was added to the solvent cyclohexane, and a homogeneous SEBS solution with a TPU mass fraction of 15% was obtained after stirring.

[0070] The SEBS solution was left standing for 30min and degassed, and then placed in two 10ml syringes with ethanol, and connected to the same coaxial two-channel needle (needle model is 18G / 14G) through a polytetrafluoroethylene tube. The Teflon tube connected to the ethanol syringe was connected to the inner channel of the coaxial two-channel needle, while the Teflon tube connected to the syringe containing the SEBS solution was connected to the outer channel of the coaxial two-channel needle, at a rate of 5mL / h. injection speed, inject SEBS solution and ethanol into a coagulation bath with distilled water, after soaking for 12 hours, put the formed fibers in an environment below minus 20 °C for 2 hours, and then freeze-dry for 6 hours to obtain hollow SEBS porous elasticity fiber.

[0071] Then th...

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Abstract

The invention discloses a novel ionic capacitive pressure and temperature sensing fiber device capable of being manufactured in batches and a preparation method of the novel ionic capacitive pressure and temperature sensing fiber device. According to the invention, a simple coaxial wet spinning technology, a non-solvent-induced phase separation technology and a freeze drying technology are combined to prepare the novel ionic capacitive sensor which has a fiber cross structure and takes flowable liquid metal as an electrode and an ionic liquid filled porous elastic fiber as a dielectric layer; the technical problems that an existing ionic capacitive pressure sensor is poor in air permeability, tedious in manufacturing process, high in manufacturing cost, difficult to achieve batch manufacturing and the like are solved. The sensor with the fiber cross structure not only has an ultra-low pressure detection lower limit and excellent pressure sensing repeatability and stability, but also has an excellent temperature sensing function (ultra-high temperature detection precision and excellent temperature sensing repeatability and stability); the device can sensitively sense a cold source, a heat source and a sharp metal device, and has a good application prospect in the field of wearable electronic devices.

Description

technical field [0001] The invention belongs to the field of flexible sensing materials based on polymer composite materials, and relates to an ion-type capacitive multifunctional (pressure, temperature) sensing fiber device that can be mass-produced and a preparation method thereof. Background technique [0002] With the development of intelligent robots, wearable electronic devices, human-computer interaction, and human health monitoring, flexible and wearable pressure / temperature sensing materials have become a research hotspot. Capacitive sensors sense external stimuli by converting external stimuli into capacitive signals. Capacitive sensors are divided into traditional capacitive sensors and new ionic capacitive sensors. Traditional capacitive sensors respond to external stimuli by changing the material of the intermediate dielectric layer, the facing area of ​​the electrode plates, or changing the distance between the upper and lower plates to change the capacitance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G01D5/24D06M13/438D06M13/352D06M11/83
CPCG01D21/02G01D5/24D06M13/352D06M13/438D06M11/83D06M2101/38D06M2101/20
Inventor 陈建闻朱雨田祝国轩
Owner HANGZHOU NORMAL UNIVERSITY