Biodegradable macromolecule composite material with shape memory function and its preparation method and use

Abstract

The invention relates to a biodegradable polymer composite material having shape memory function, comprising a biodegradable polymer material, which is characterized in that the molecular weight of the biodegradable polymer material is 20000 to 1500000, 1 to 20 parts of nano-scopic or micron-sized organic conductive particles and / or inorganic magnetic particles are added in the 100 parts by weight of the polymer, wherein, the organic conductive particles is one of polypyrrole, polyaniline, poly3,4-dioxane ethyl thiophene or the mixture of them, the inorganic magnetic particles is one of ferroferric oxide and ferric oxide magnetic particles or the mixture of them. The mechanical property and mechanical property of the materials, with good elasticity modulus, well elasticity, high shape recovery rate, easy shape memory and changing operation and fast shape recovery speed.

Description

technical field [0001] The invention relates to a polymer composite material with shape memory function, its preparation method and application. Background technique [0002] Shape memory material is a kind of intelligent material, and its shape memory characteristic is that it can perceive external stimuli (such as temperature, force, electromagnetic, pH value, solvent, etc.) strain, etc.) to return to its pre-set state. [0003] From the type of materials, shape memory materials can be divided into shape memory alloys, shape memory ceramics, shape memory polymers and shape memory composites. In recent years, with the rapid development of life science and medicine, human beings are paying more and more attention to their own health. The shape memory alloys used as human implants in the early days gradually showed some human safety. In addition to the biocompatibility of alloy materials, In addition to affecting and limiting human pathological detection and the deformation...

AI Technical Summary

Problems solved by technology

[0006] 1. For polymer materials with physical cross-linking structure, under the action of external stress, the internal molecular segments are easy to slide relative to each other, resulting in a decrease in the mechanical properties of the material

[0007] 2. The shape memory and recovery operations can only be carried out by direct heating through heat conduction, which is inconvenient to operate

[0008] 3. The shape memory performance, especially the shape recovery speed and recovery force, and the mechanical properties are not high, and it is difficult to guarantee at the same time