A lipoic acid-silver nano self-healing material and its preparation method and application

Abstract

The invention discloses a lipoic acid-silver nano self-healing material and its preparation method and application, and belongs to the field of self-healing materials. The lipoic acid-silver nano self-healing material prepared by the invention uses lipoic acid as the main raw material, and uses its strong reducing property to directly reduce silver ions into silver nanometers. The generated silver nanoparticles combine with the sulfur atoms of the end chain to prevent its depolymerization and ring closure, providing more active sites. In addition, dynamic disulfide bonds, coordination between silver ions and carboxyl groups, and hydrogen bonding all make lipoic acid-silver nano self-healing materials have strong mechanical strength and self-healing ability. The production of silver nanometers may provide the self-healing material with better antibacterial properties, catalytic properties and photothermal properties, and has certain application potential in medicine, environment and energy.

Description

technical field [0001] The invention relates to the technical field of self-repairing materials, in particular to a lipoic acid-silver nanometer self-repairing material, a preparation method and an application thereof. Background technique [0002] In daily life, various materials are subject to different degrees of stress damage, which is one of the important reasons for the short service life of materials. In order to improve this deficiency and further prolong the service life of materials, new materials can be developed to enable self-healing when damaged by external stress. This type of material is called self-healing materials. The mechanical strength and self-repairability of materials mainly depend on the strength of chemical bonds. The weaker the chemical bond strength, the better the self-healing performance of the material, but the weaker the mechanical strength. The stronger the chemical bond strength, the better the mechanical strength of the material, but the ...

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Problems solved by technology

[0008] Although good research results have been achieved in the preparation and application of self-healing materials, there are still some deficiencies: 1. The synthesis or preparation process of self-healing materials is complicated; 2. The simple combination of self-healing materials and functional nanomaterials Mixing may cause uneven distribution, resulting in poor repeatability; 3. The material has a single function, and it is difficult to meet the increasingly diverse needs

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