A composite material with negative Poisson's ratio and its preparation method and application

The preparation of composite materials with negative Poisson's ratio through 3D printing technology solves the limitations of existing materials in terms of mechanical properties, realizes the multiple performance improvement of the materials, and is suitable for a variety of high-performance applications.

CN116444719BActive Publication Date: 2025-03-18WUYI UNIV
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Patent Information

Application Number
CN202310306190.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-24
Publication Date
2025-03-18
Estimated Expiration
2043-03-24

AI Technical Summary

Technical Problem

Existing elastomeric materials have limitations in mechanical properties, and it is difficult to show excellent properties within a variety of mechanical properties.

Method used

Composite materials with negative Poisson's ratio properties are prepared by 3D printing technology. The material structure consists of concave hexagons, which can expand laterally when stretched and shrink laterally when compressed, enhancing the mechanical properties of the material.

Benefits of technology

The shear modulus, notch resistance, fracture resistance, load bearing capacity and elastic properties of the material are improved, and are suitable for contact layer materials and packaging layer materials in the fields of biomedicine, tissue engineering, flexible electronics, etc.

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Abstract

The present invention discloses a composite material with negative Poisson's ratio, a preparation method and an application thereof, wherein the material comprises a unit cell structure; the unit cell structure is composed of a concave hexagon, and the concave hexagon is a centrally symmetrical and non-axisymmetric figure. The composite material with negative Poisson's ratio of the present invention improves the mechanical properties and deformation mode of the material. It can be used in contact layer materials and packaging layer materials in the fields of biomedicine, tissue engineering, flexible electronics, etc.
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