Carbon nanotube / polymer composite membrane array type flexible force sensor and manufacturing method thereof

Abstract

The invention relates to a carbon nanotube / polymer composite membrane array type flexible force sensor and a manufacturing method thereof. The carbon nanotube / polymer composite membrane array type flexible force sensor comprises a parallel metal row electrode and a parallel metal column electrode which are respectively and graphically arranged on the upper and lower surfaces of a carbon nanotube / polymer composite membrane, an upper insulation protecting layer adhered onto the row electrode, and a lower insulation protecting layer adhered onto the column electrode, wherein the row electrode and the column electrode are distributed in a spatial intersection way, and a spatial intersection part and the carbon nanotube / polymer composite membrane contained in the spatial intersection part form a force sensing unit of the array type flexible force sensor; and the carbon nanotube / polymer composite membrane is made by a composite material that carbon nanotubes are uniformly dispersed in a polymer matrix material, and the mass ratio of the carbon nanotubes to the polymer matrix material is (0.1-15): 100. The carbon nanotube / polymer composite membrane in the array type flexible force sensor has the characteristics of excellent flexibility, good repeatability, stable performances, good consistency and the like.

Description

technical field [0001] The invention belongs to the field of nanotechnology and sensing technology, and in particular relates to a carbon nanotube / polymer composite film array type flexible force sensitive sensor and a manufacturing method. Background technique [0002] Because of its good flexibility, the flexible sensor is not limited by the shape of the object to be measured, and can be attached to various regular or irregular surfaces to realize the sensing function. The flexible force sensor is mainly used in the measurement of extrusion force and shear force, and can be used as a tactile sensor. The discovery of carbon nanotubes has injected new vitality into the research of functional materials. Dispersing a very small amount of carbon nanotubes into a polymer will make the entire composite exhibit a certain degree of electrical conductivity. Recent studies have shown that the electrical conductivity of carbon nanotube / polymer composites changes significantly with th...

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Problems solved by technology

Although after years of improvement, the piezoresistive coefficient of the carbon black / silicone rubber composite system has been significantly improved, but due to the high concentration of carbon black required, the flexibility of the matrix material is reduced, and the conductive path formed by carbon black particles is affected. Instability and non-recoverability when stressed

In addition, sensitive elements made of this sensitive material often show problems such as poor flexibility, obvious hysteresis, and poor stability. These shortcomings limit the application of pressure-sensitive conductive rubber in high-performance flexible force-sensitive sensors.

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