Preparation method of carbon nanotube fiber/polydimethylsiloxane composite electro-conductive elastomer

Abstract

The invention discloses a preparation method of a carbon nanotube fiber / polydimethylsiloxane composite conductive elastomer. The method comprises the following steps: 1) ultrasonically mixing ethanol,ferrocene, thiophene and deionized water to obtain a reaction solution, preparing a hollow cylindrical object of the carbon nano tube by a floating catalytic chemical vapor deposition method, performing bundling, filament collecting and air exhaustion, performing twisting operation to obtain carbon nano tube fibers, and drying the carbon nano tube fibers for later use; 2) fully stirring and uniformly mixing polydimethylsiloxane and a curing agent to obtain a mixed solution, vacuumizing the solution, pouring the mixed solution into a culture dish, and drying and preheating the mixed solution;3) dipping the dried carbon nanotube fiber into the preheated mixed solution, adding the mixed solution before preheating, and curing and molding the carbon nanotube fibers in a drying oven to obtaina carbon nanotube fiber / polydimethylsiloxane compound; and 4) performing cutting operation to obtain the carbon nanotube fiber / polydimethylsiloxane composite conductive elastomer. The preparation method is controllable in process and easy to operate, and the prepared finished product has high elasticity and flexibility and also has good electrical conductivity.

Description

technical field [0001] This product relates to the field of flexible and stretchable electronics, in particular to a method for preparing a carbon nanotube fiber / polydimethylsiloxane composite conductive elastomer. Background technique [0002] With the development of electronic information technology, people have put forward higher requirements for wearable electronic products, and electronic products are developing at a rapid speed in the direction of intelligence, miniaturization, portability, flexibility and elasticity. The construction of flexible and stretchable electronic devices relies on elastic conductors that can maintain good electrical conductivity under deformation. Carbon nanotubes possess high mechanical properties and excellent electrical conductivity, and have attracted much attention in stretchable wires in recent years. [0003] In recent years, Zu et al. prepared some conductive elastomers by dispersing CNTs in polymers or directly impregnating CNT arra...

AI Technical Summary

Problems solved by technology

Since Ecoflex is a highly elastic material, when the strain sensor is stretched, the highly oriented carbon nanotube fibers prepared by dry spinning are easy to break and have poor durability

[0005] So far, the carbon nanotube / polydimethylsiloxane composite conductive elastomer prepared by the hybrid method has the disadvantages of easy aggregation of CNTs in the polymer and unreliable conductivity of the conductive elastomer, which affects its flexibility. Applications of Stretchable Electronics

The carbon nanotube fibers prepared by the CNT array spinning method have low yield and are easy to break. The conductive elastomer prepared based on this carbon nanotube fiber has poor durability and is not suitable for use in flexible and stretchable electronic devices.

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