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Collagenous fiber-based flexible pressure sensing material and preparation method thereof

A technology of collagen fibers and sensing materials, applied in the field of flexible sensing, which can solve the problems of complex preparation process, difficulty in large-scale industrial production, and large thickness

Active Publication Date: 2021-05-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Sensors based on traditional polymers form a dense film and have poor air permeability. Long-term attachment to the skin may cause damage to the skin
Moreover, the widespread use of sensors based on synthetic polymer materials will generate a large amount of non-degradable electronic waste, which will cause huge damage to the environment and do not meet the requirements of green and sustainable development.
At the same time, technologies such as electrospinning and high-temperature carbonization make the product preparation process more complicated, the cost is higher, and large-scale industrial production is difficult to achieve
At present, the pressure sensing material made of animal skin has good air permeability and degradability, but the sensor composed of multiple layers of leather may have a large thickness, which limits its practical application range

Method used

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  • Collagenous fiber-based flexible pressure sensing material and preparation method thereof
  • Collagenous fiber-based flexible pressure sensing material and preparation method thereof
  • Collagenous fiber-based flexible pressure sensing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Select sheepskin collagen fiber as base material, when pH=5.5, mix the 25% glutaraldehyde aqueous solution of the mass concentration 0.8% collagen fiber suspension of 10g with 0.032g (the solid content in the collagen fiber suspension and the quality of cross-linking agent ratio of 1:0.4), stirred at 25°C for 4h, and stirred at 45°C for 4h to obtain a suspension of cross-linked collagen fibers. Add 1.4% Ti by mass fraction to the resulting suspension of crosslinked collagen fibers 3 C 2 Dispersion liquid 3.14g (mass ratio of the solid content in the cross-linked collagen fiber suspension to the solid content in the MXene dispersion liquid is 1:0.5), after fully mixing, adjust the pH value to 3, and then stir for 1h to obtain Ti 3 C 2 / collagen fiber composite suspension. Ti 3 C 2 / collagen fiber composite suspension was put into a 25mL beaker, and freeze-dried at -30°C and 0.1Pa for 24h to obtain a sponge-like porous collagen fiber-based flexible pressure sensing m...

Embodiment 2

[0046] Select cowhide collagen fibers as the base material, and when pH=6, mix 10 g of the mass concentration 1% collagen fiber suspension with 0.012 g of genipin (the mass ratio of the solid content in the collagen fiber suspension to the crosslinking agent is 1 :0.12), stirred at 25°C for 24h to obtain a suspension of cross-linked collagen fibers. Add 0.5% Mo by mass fraction to the obtained suspension of crosslinked collagen fibers 2 Ti 2 C 3 Dispersion liquid 8.96g (mass ratio of the solid content in the cross-linked collagen fiber suspension to the solid content in the MXene dispersion liquid is 1:0.4), after fully mixing, adjust the pH value to 5, and then stir for 1.5h to obtain Mo 2 Ti 2 C 3 / collagen fiber composite suspension. The resulting Mo 2 Ti 2 C 3 / collagen fiber composite suspension was put into a 25mL beaker, and freeze-dried at -40°C and 0.1Pa for 40h to obtain a collagen fiber-based flexible pressure sensing material with a sponge-like porous struc...

Embodiment 3

[0048] Select pigskin collagen fibers as the base material, and when pH=5, mix 5 g of 3% collagen fiber suspension with a mass concentration of 0.012 g of catechin (the mass ratio of the solid content in the collagen fiber suspension to the crosslinking agent is 1:0.08), stirred at 35°C for 10 h to obtain a suspension of cross-linked collagen fibers. Add 0.78% Ti by mass fraction to the resulting suspension of crosslinked collagen fibers 2 C dispersion liquid 5.7g (mass ratio of the solid content in the cross-linked collagen fiber suspension to the solid content in the MXene dispersion liquid is 1:0.3), after fully mixing, adjust the pH value to 4, and then stir for 0.5h to obtain Ti 2 C / collagen fiber composite suspension. Ti 2 The C / collagen fiber composite suspension was put into a 25mL beaker, and freeze-dried at -20°C and 0.1Pa for 48h to obtain a collagen fiber-based flexible pressure sensing material with a sponge-like porous structure. The sensitivity of the obtaine...

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Abstract

The invention discloses a collagenous fiber-based flexible pressure sensing material and a preparation method thereof, and belongs to the technical field of flexible sensing. The preparation method comprises the following steps: mixing a collagenous fiber suspension with a cross-linking agent, and carrying out a cross-linking reaction to prepare a cross-linked collagenous fiber suspension; adding an MXene dispersion liquid into the obtained cross-linked collagen fiber suspension liquid, and uniformly dispersing to obtain an MXene / collagen fiber composite suspension liquid; and carrying out freeze drying treatment on the obtained MXene / collagenous fiber composite suspension to obtain the collagenous fiber-based flexible pressure sensing material. The collagenous fiber-based flexible pressure sensing material has a spongy porous structure and comprises a collagenous fiber substrate material, and the surface of the substrate material is coated with MXene. According to the collagen fiber-based flexible pressure sensing material, the use of a traditional synthetic polymer as a substrate is avoided, and the collagen fiber-based flexible pressure sensing material has excellent air permeability and high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of flexible sensing, and relates to a collagen fiber-based flexible pressure sensing material and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, electronic products are gradually developing in the direction of lightweight, flexible and wearable. In addition to the advantages of high sensitivity of general rigid sensors, flexible pressure sensors also have good flexibility, can be bent at will, and can detect the magnitude and distribution of force arbitrarily. They have great application potential in entertainment technology, human-machine interface, personal healthcare and motion monitoring, etc. [0003] Compared with other types of sensors, the resistive flexible pressure sensor has the characteristics of simple preparation process and high sensitivity. It is composed of a flexible polymer matrix and conductive nanomaterials. He (He, et ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J9/28C08L89/00
CPCC08J3/242C08J9/28C08J2389/00C08K3/14
Inventor 张文博潘朝莹马建中卫林峰陈珍
Owner SHAANXI UNIV OF SCI & TECH
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