A method for preparing flexible auxetic material with stable structure by mixed spinning

Abstract

The invention discloses a method for preparing a flexible auxetic material of a stable structure by mixed spinning. The method is characterized in that a near-field electro-spinning direct writing technology, a template electro-spinning technology or polymer melting are adopted to make the mixed spinning be subjected to direct deposition and spinning, and an auxetic structure is formed; a solution or melt is spun into fibers, and the fibers are collected on the auxetic structure to form a disordered structure; a flexible composite auxetic material with the auxetic structure and the disordered structure is stripped from a collecting device; the flexible auxetic material is subjected to post-treatment to improve the mechanical properties of the flexible auxetic material or make the flexible auxetic material have functions. Through the adoption of a mixed spinning method, the prepared flexible composite auxetic material with the auxetic structure and the disordered structure has not only an auxetic effect but also a stable structure, and is wide in size range and suitable for various polymers, can be used in the fields of clothing, filtration materials, biomedical application, tissue engineering, optoelectronic materials, impact protection, flexible sensors, composite materials and the like, and has broad prospects.

Description

technical field [0001] The invention relates to a method for preparing a flexible auxetic material with a stable structure by mixed spinning, in particular to a method for preparing a flexible auxetic material with a stable structure of an auxetic structure and a disordered structure by using a mixed spinning method, belonging to The technical field of auxetic structural materials. Background technique [0002] Auxetic material refers to the material with negative Poisson's ratio effect, that is, the phenomenon that the material becomes wider perpendicular to the stretching direction when stretched, and the material becomes thicker when compressed. Auxetic materials are known as one of the smart materials in the 21st century, and foam materials, polymer materials and composite materials with auxetic effects are being produced continuously. The auxetic structure is made of flexible materials and can provide a basis for its wide application. At present, a variety of flexible ...

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