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Flexible composite film with high sensitivity and wide sensing range and application thereof

A composite film, high-sensitivity technology, applied in the field of application, can solve the problems of weak bonding force between flexible substrates and active materials, insufficient sensing range, and poor material durability, so as to maintain mechanical properties and short response time. , the effect of good resilience

Active Publication Date: 2021-12-03
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention aims to solve the technical problems of weak bonding force between the flexible substrate and the active material, weak material durability, and insufficient sensing range; and provides a flexible composite film with high sensitivity and wide sensing range and its application

Method used

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  • Flexible composite film with high sensitivity and wide sensing range and application thereof
  • Flexible composite film with high sensitivity and wide sensing range and application thereof
  • Flexible composite film with high sensitivity and wide sensing range and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: The preparation method of the PDMS-MXene / TPU flexible stress sensor in this example is as follows:

[0043] Step 1, the flexible substrate is prepared by the film coating method. First, measure 5g of polyurethane (TPU) pellets, and 40ml of N,N-dimethylformamide (DMF) solution in the same amount, add them together to a three-necked bottle, and heat and stir At the same time, the water is condensed and refluxed, and the TPU glue is obtained in about one hour. Pour the glue solution into a beaker and vacuumize to remove air bubbles. The clear glass plate is then washed and dried. Take out the treated glue solution, pour the glue solution evenly on the glass plate, and place it on the automatic film coating machine to coat the film. After the film coating is completed, put the glass plate in a vacuum drying oven for drying, at 100°C After drying for 1 h, the TPU film was obtained after demoulding.

[0044] Step 2, the 2D Ti 3 C 2 MXene nanosheets were added ...

Embodiment 2

[0047] Embodiment 2: The preparation method of the PDMS-MXene / TPU flexible stress sensor in this embodiment is as follows:

[0048] Step 1, the flexible substrate is prepared by coating method. First, measure 4g of polyurethane (TPU) pellets and 30ml of N,N-dimethylformamide (DMF) solution, put them into a three-necked flask together, heat and stir while passing water to condense and reflux, and obtain in about one hour TPU glue. Pour the glue solution into a beaker and vacuumize to remove air bubbles. The clear glass plate is then washed and dried. Take out the processed glue solution, pour the glue solution evenly on the glass plate, and place it on the automatic film coating machine to coat the film. After the film coating is completed, put the glass plate in a vacuum drying oven for drying, at 80°C After drying for 2 hours, the TPU film was obtained after demoulding.

[0049] Step 2, the 2D Ti 3 C 2 MXene nanosheets were added to deionized water, and ultrasonically t...

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Abstract

The invention discloses a flexible composite film with high sensitivity and wide sensing range and an application thereof, and belongs to the application field of wearable sensors, electronic skin and the like. The invention aims to solve the technical problems that the binding force between a flexible substrate and an active material is not strong, the durability of the material is not strong, and the sensing range is not large enough. The flexible composite film comprises an MXene / TPU composite film and PDMS films, wherein the PDMS films are arranged on two sides of the MXene / TPU composite film and are bonded with the MXene / TPU composite film into a whole; wherein the MXene / TPU composite film is prepared by the following steps: preparing a TPU film by adopting a film coating method, spraying a colloidal aqueous solution prepared from 2D Ti3C2MXene nanosheets, and drying. The product is suitable for a series of applications such as health detection, motion signal detection, robot motion detection, wearable electronic equipment and the like.

Description

technical field [0001] The invention belongs to the application fields of wearable sensors and electronic skins, etc.; in particular, it relates to a flexible composite film with high sensitivity and wide sensing range and its application; and a preparation method of PDMS-MXene / TPU flexible stress sensor. Background technique [0002] In recent years, with the rapid development of flexible sensors, soft, thin, light, low-cost, wearable, and mass-fabricated flexible sensors have gradually become a major research hotspot. Flexible stress sensors with high sensitivity, fast response, and wide sensing range are key to human-computer interaction and wearable electronics. Sensors have great application potential in human activity monitoring, biomedical research, etc. However, there are still great challenges in the low-cost, high-sensitivity, large-scale fabrication of flexible sensors. [0003] MXenes, as 2D transition metal carbides, nitrides, and carbonitrides, with tunable i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B27/40B32B27/08B32B33/00B32B3/08G01L1/00B29D7/01
CPCB32B27/283B32B27/40B32B27/08B32B33/00B32B3/08G01L1/00B29D7/01B32B2255/10B32B2255/20
Inventor 翁凌张振楠关丽珠王小明郭科
Owner HARBIN UNIV OF SCI & TECH
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