Shape memory composite material for fingerprint recognition and its 3D printing preparation method

Abstract

The invention provides a fingerprint-identification shape memory composite material and a 3D printing preparation method thereof, relating to a composite material and a preparation method thereof. The invention aims to solve the technical problem that the shape memory material in the prior art does not have the encryption function. The fingerprint-identification shape memory composite material is composed of a fingerprint chip, polycaprolactone and dibenzoyl peroxide. The preparation method comprises the following steps: 1. entering fingerprints in need of identification into the fingerprint chip; 2. preparing fibers; 3. coating a Tango Black resin layer on the surface of the fibers and fingerprint chip, covering the fibers on the Tango Black resin layer and carbon nano paper, printing a Tango Black resin layer, irradiating under ultraviolet light, and crosslinking to obtain the fingerprint-identification shape memory composite material. Under the drive action of fingerprint identification, the shape-memory polymer composite material is endowed with the biological identification function, thereby implementing the functions of encryption protection and the like in the shape memory polymer composite material driver.

Description

technical field [0001] The invention relates to a composite material and a 3D printing preparation method thereof. Background technique [0002] As a branch of smart materials, shape memory polymers can return from a temporary shape to an original shape under external stimuli. Commonly used external excitation methods include temperature rise, current flow, alternating magnetic field, light of a specific wavelength, humidity change, and so on. Taking thermal drive as an example, the original shape formed after the shape memory polymer is synthesized is heated above the glass transition temperature, an external force is applied to deform it, and the temperature is lowered during the deformation process. When the external force is removed, the shape memory polymer can be endowed. The temporary shape retained for a long time, when heated above the glass transition temperature again, the shape memory polymer can return to its original shape. [0003] Compared with other shape ...

AI Technical Summary

Problems solved by technology

But state-of-the-art shape-memory materials do not have cryptographic capabilities