Stretchable calotropis gigantean fiber graphene flexible sensor

Abstract

The invention relates to the technical field of calotropis gigantea fabric flexible sensors and particularly relates to a stretchable calotropis gigantea fiber graphene flexible sensor. The stretchable calotropis gigantea fiber graphene flexible sensor comprises a stretchable flexible sensor body, electrodes and a lead, wherein the stretchable flexible sensor body is a conductive flexible calotropis gigantea fabric layer, and the conductive flexible calotropis gigantea fabric layer is formed by weaving conductive calotropis gigantea yarns; the conductive calotropis gigantea yarns are prepared from conductive calotropis gigantea fibers; the stretchable flexible sensor body is connected with an electrode; and the electrode is connected with a lead. The calotropis gigantean yarns are coated by a padding method, the calotropis gigantean yarns obtain uniform and excellent conductive performance through process regulation and control, and then the calotropis gigantean yarns are woven by a textile technology to obtain the stretchable calotropis gigantean fiber graphene flexible sensor with an antibacterial function and durability.

Description

technical field [0001] The invention relates to the technical field of gourd fabric flexible sensors, in particular to a stretchable gourd fiber graphene flexible sensor. Background technique [0002] Traditional metal and semiconductor-based sensors have poor sensitivity, toughness and strain capacity, which leads to limitations in the application of sensors. In order to overcome these defects, multifunctional flexible wearable electronic textiles have emerged as the times require, and are used in flexible sensors, wearable electronics Equipment, electromagnetic interference shielding, etc. are more and more widely used. However, although most flexible sensors have high sensitivity and wide detection range, properties such as durability and antibacterial properties are neglected. Crow's horn melon is a natural antibacterial fiber, and graphene is an excellent antibacterial and conductive material. The combination of the two can not only make the croissant melon fiber have ...

AI Technical Summary

Problems solved by technology

However, as the number of stretches increases, the stretching of the graphene film is uneven, resulting in a significant decrease in the accuracy of the test tensile force and poor durability.

[0005] The Chinese patent authorization publication number is CN111592761A, which discloses a new type of flexible smart fabric sensor. The carbon black in the carbon black solution is adsorbed onto the modified platinum-catalyzed silicone rubber to obtain a carbon black / platinum-catalyzed silicone rubber composite material. The surface adsorption of platinum-catalyzed rubber combined with strong carbon black results in a carbon black / platinum-catalyzed silicone rubber composite material with high sensitivity and large recoverable strain, and avoids the agglomeration of carbon black on the surface of the composite material, but it cannot obtain a conductive coating with uniform thickness , resulting in poor durability and no antibacterial function

The sensor can achieve ultra-high resistance changes under a small strain, but conductive fibers or dielectric fibers are introduced in the radial and weft directions. When the fabric is stretched, friction will be generated in the stretching direction, making the carbon fibers or dielectric fibers The electrical fiber friction is damaged, the sensing durability is poor, and this type of sensor does not have antibacterial function

[0007] The Chinese patent authorization publication number is CN111055554A, which discloses a new type of flexible smart fabric sensor and its manufacturing method. Carbon nanofibers with micro-convex lattices are prepared by electrospinning technology as pressure-sensitive material layer materials, and electrodes are covered with conductive materials. Layer, the protective layer of the fabric sensor is prepared by using high molecular elastic polymer, so that the flexible smart fabric sensor has high sensitivity, softer, thinner thickness, breathability and washability, but due to the limitation of the electrospun material itself, the sensor Does not have antibacterial function and poor durability

[0008] The Chinese patent authorization publication number is CN107233074A, which discloses a flexible and wearable nanofiber fabric sensor and its preparation method. The continuous nanofiber yarn prepared by electrospinning is woven into a fabric through weaving technology, and a conductive strip is compounded on the upper and lower surfaces of the fabric. The gel film of copper wire is used to obtain a nanofiber fabric sensor with a sandwich structure, which has good mechanical adaptability, ultra-high sensitivity and wide sensing range, but the materials suitable for electrospinning are limited, and electrospun fibers The fibers of the membrane are thinner and the bonding force between fibers is lower, resulting in poor durability of the sensor substrate, and the sensor does not have antibacterial function

[0009] The Chinese patent authorization publication number is CN107167180A, which discloses a kind of elastic sensor and its preparation method, by immersing the elastic fiber coated with graphene oxide obtained after being immersed in the graphene oxide solution into the tin chloride solution or the tin protochloride solution and The hydrothermal reaction is carried out in the mixed solution of graphene oxide dispersion to obtain conductive elastic fiber products, and the electrodes are fixed at both ends of the product to obtain elastic sensors. The sensor has high wearing comfort, wide detection range and high sensitivity, but the outer layer of elastic fiber is cotton, Fibers such as hemp and wool do not have antibacterial function, and when the graphene-coated fiber is stretched, the surface graphene is easy to fall off after friction, lacks a protective layer, and has poor durability

[0010] The Chinese patent authorization publication number is CN108896199A, which discloses a stretchable yarn sensor and its preparation method, in which temperature-sensitive materials or moisture-sensitive materials are coated on cotton fibers by dip coating, drip coating, pulling or spin coating. Or the electrode yarn is formed on the silk fiber, and the yarn sensor is prepared by winding the electrode yarn on the elastic yarn according to the "S" spiral. The sensor has good stability, high sensitivity, and is light and thin and can be attached to the human skin. Due to the characteristics of the material itself, the sensor does not have antibacterial function and cannot be used for human body monitoring for a long time

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