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Fingerprint recognition-driven shape memory composite material and preparation method thereof

A composite material and fingerprint identification technology, which is applied in the field of composite materials and its preparation, can solve problems such as no encryption function

Active Publication Date: 2017-06-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] Specific Embodiment 1: The shape memory composite material driven by fingerprint identification in this embodiment is composed of a fingerprint chip and a particle-filled shape memory composite material. The particle-filled shape memory composite material is composed of an epoxy resin series shape memory polymer and a filling material. Epoxy resin series shape memory polymer accounts for 60-99.5% of the total mass of the particle-filled shape-memory composite material, and the filling material accounts for 0.5%-40% of the total mass of the particle-filled shape-memory composite material;

[0022] The preparation method of the epoxy resin series shape memory polymer: mixing bisphenol A type epoxy resin E-51, p-diamino-diphenyl-methane (DDM) and m-phenylenediamine (m-PDA);

[0023] Among them, bisphenol A type epoxy resin E-51 accounts for 25% to 30% of the quality of epoxy resin series shape memory polymers, and m-phenylenediamine (m-PDA) accounts for 14% to 30% of the ma...

specific Embodiment approach 2

[0027] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the epoxy resin series shape memory polymer accounts for 90-99.5% of the total mass of the particle-filled shape memory composite material, and the filler material accounts for the total mass of the particle-filled shape memory composite material. 0.5% to 10% of the total. Others are the same as the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the epoxy resin series shape-memory polymer accounts for 80-90% of the total mass of the particle-filled shape-memory composite material, and the filler material accounts for 80% to 90% of the total mass of the particle-filled shape-memory composite material. 10% to 20% of the total mass of composite materials. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a shape memory composite material of a fingerprint recognition driver and a preparation method thereof and relates to a composite material and a preparation method of the composite material. In order to solve the technical problem that shape memory materials in the prior art do not have an encryption function, the shape memory composite material of the fingerprint recognition driver consists of a fingerprint chip and a particle filled shape memory composite material body. The preparation method comprises the steps of firstly, entering a fingerprint to be recognized into the fingerprint chip; secondly, putting the fingerprint chip and two electrodes into a mold, connecting the two electrodes to the two ends of the fingerprint chip, pouring the particle filled shape memory composite material body mixed uniformly into the mold to be exposed from the upper surface of the fingerprint chip, and performing curing for 8-24 hours at the temperature ranging from 80 DEG C to 150 DEG C to obtain the shape memory composite material of the fingerprint recognition driver. The fingerprint recognition driver can endow the shape memory polymer composite material with a biological recognition function, and accordingly functions of encryption protection and the like of the driver made of the shape memory composite material are achieved.

Description

technical field [0001] The invention relates to a composite material and a 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 memory mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/06C08K7/24C08K3/04C08K3/08C08G59/50
CPCC08G59/5033C08K3/04C08K3/08C08K7/06C08K7/24C08K2003/0862C08K2201/011C08L2201/12C08L63/00
Inventor 冷劲松刘彦菊周天阳
Owner HARBIN INST OF TECH
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