Flexible pressure-sensitive composite material based on phenyl silicone rubber and preparation method of flexible pressure-sensitive composite material

Abstract

The invention discloses a flexible pressure-sensitive composite material based on phenyl silicone raw rubber and a preparation method thereof, the flexible pressure-sensitive composite material comprises a phenyl silicone raw rubber composite foam material layer; a microporous structure is formed in the phenyl silicone raw rubber composite foam material layer, a plurality of through holes are formed in the phenyl silicone raw rubber composite foam material layer in a penetrating manner, and modified carbon nanotubes are polymerized and deposited on the surfaces of the microporous structure, the through holes and the phenyl silicone raw rubber composite foam material layer; according to the preparation method, the modified carbon nano tube and phenyl silicone rubber composite foam material layer is effectively prevented from falling off; specifically, strong hydrogen bonds are formed between carbon nanotubes and benzene rings in the phenyl silicone rubber composite foam material under the action of an electric field, so that the binding force between the two materials is increased, and the problem that the binding force between the two materials is weakened gradually under the condition of cyclic stress is solved; the problems that the prepared composite material falls off and is poor in stability are solved. And the service life of the composite material is prolonged.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive materials, in particular to a flexible pressure-sensitive composite material based on phenyl silicone raw rubber and a preparation method thereof. Background technique [0002] With the rapid development of information technology, the requirements for intelligent monitoring in various fields are getting higher and higher, and there are more and more. Sensors are front-end devices for information collection and detection, and are an important link in the information chain. In order to allow the sensor to adapt to the collection of more and more special signals and measurement environments, the sensor has begun to develop in the direction of intelligence, integration, and ultra-miniaturization. In recent years, with the rapid development of new materials and preparation processes, the emergence of Many new flexible sensitive materials have been prepared, and the prepared flexible sensors ...

AI Technical Summary

Problems solved by technology

[0008] 1) In the traditional preparation process of flexible composite materials, the bonding force between the nano-conductive functional material and the polymer / silicone rubber composite material is van der Waals force, the bonding force is weak, it is easy to fall off, and the structural stability of the material is poor;

[0009] 2) Nano-conductive functional materials are prone to agglomeration when filled into silicon foam sheets, resulting in uneven mixing with polymer / silicone rubber composite materials, and poor functional consistency of composite materials;

[0010] 3) The preparation process of the material leads to a small amount of nano-conductive functional materials that can enter the polymer / silicone rubber composite material, and it is in an agglomerated state, resulting in low sensitivity of the composite material and a small range of pressure effects;

[0011] 4) The preparation mechanism of the material leads to a short service life of the prepared flexible piezoresistive sensitive composite material;

[0012] 5) Since the solid phenyl silicone raw rubber has a rich layer of holes, the traditional conductive paste printing method cannot realize printing preparation, that is, it is impossible to print directly on the phenyl silicone raw rubber to prepare flexible pressure-sensitive composite materials

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