Mechanically responsive degradable materials with shape memory and temperature tunable

Abstract

The invention discloses a mechanical response degradable material with adjustable shape memory temperature. In the field of polymer synthesis, L-malic acid and 1,8-octanediol are mixed in a mass ratio of 6:1.5-2.5 under negative pressure. , the temperature is 120 o C~140 o Under C, carry out synthetic reaction, obtain molding material, then described molding material is placed in 120 o C~140 o C, after a subsequent heat treatment for 2–36 hours, a mechanically responsive degradable material with adjustable shape memory temperature was obtained. The present invention enables the material to have a shape memory function through the control of the feeding ratio, and further increases the glass transition temperature of the material through the subsequent heat treatment, so that the area of ​​the shape memory temperature can be adjusted, and in the heat treatment process through The ability to achieve a mechanical response to an unbalanced heat supply.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to a mechanical response degradable material with adjustable shape memory temperature. Background technique [0002] L-malic acid, also known as L-2-hydroxysuccinic acid, has two stereoisomers due to an asymmetric carbon atom in the molecule. In nature, it exists in three forms, namely D-malic acid, L-malic acid and its mixture DL-malic acid. White crystal or crystalline powder, with strong hygroscopicity, easily soluble in water and ethanol. Has a particularly pleasant sour taste. L-malic acid is mainly used in the food and pharmaceutical industries. Naturally occurring L-malic acid is in the L form, and it exists in almost all fruits, most of which are pome fruits. L-malic acid is a colorless needle-like crystal or white crystalline powder, odorless, with a pungent refreshing sour taste, melting point 127-130°C, easily soluble in water, 55.59 / 100mL (20°C), soluble in ethanol, ...

AI Technical Summary

Problems solved by technology

However, this material does not have shape memory function, and the material strength is very low, so it can only be used for soft materials

[0005] At present, there are no reports at home and abroad on the synthesis of new materials with both external force response and shape memory functions from L-malic acid and 1,8-octanediol, so this patent is of great significance

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