Reversible shape memory material with photoelectric responsiveness and its preparation method and application

Abstract

The invention relates to a functional polymer material, in particular to a reversible shape memory material with dual response characteristics of electricity and light and its preparation method and application. The invention provides a reversible shape memory material with photoelectric dual response characteristics, the material is a polymer-based conductive composite material with an isolation structure, wherein the polymer is a semi-crystalline polymer with a wide melting range, that is, the The melting range temperature of the above-mentioned polymer is more than or equal to 20°C, and the melting range temperature=final melting temperature-initial melting temperature. In the present invention, the reversible shape memory material with dual response characteristics of electricity and light can be prepared by physical blending, hot pressing, forming and cooling to shape, and the preparation method is simple; an isolation structure of conductive filler is built inside the material to obtain excellent Conductive performance; the conductive filler of the isolation network will not affect the movement of the reversible shape memory polymer molecular chain, so that it can still maintain excellent driving performance as a driver.

Description

technical field [0001] The invention relates to a functional polymer material, in particular to a reversible shape memory material with dual response characteristics of electricity and light and its preparation method and application. Background technique [0002] With the rapid development of artificial intelligence robots, actuators that can convert external stimuli (heat, light, electricity, etc.) into mechanical work have received extensive attention. Bidirectional shape memory polymers (RSMPs) are smart materials capable of exhibiting shape changes through temperature changes, and RSMPs have advantages such as low density, low energy consumption, and excellent processability, demonstrating their potential for applications in the field of actuators. However, traditional RSMP can only respond to changes in ambient temperature, which limits its application to a large extent. Constructing a filler network in RSMP to increase its response to light and electricity can furthe...

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Problems solved by technology

[0003] The shape memory polymers currently used to prepare electric drives are usually directly blended with conductive fillers. Although this can indeed achieve electric drives, there are many limitations: (1) To realize the transformation of polymers from insulators to conductors, it is necessary to introduce A large number of fillers, and it needs to be driven at a higher voltage; (2) The presence of a large number of fillers will affect the mobility of polymer molecular chains and reduce the shape memory performance of RSMP

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