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A kind of polyester shape memory material and preparation method thereof

A memory material and polyester technology, applied in the field of polyester shape memory material and its preparation, can solve the problems of poly(octanediol-citric acid) ester elastomer without memory, long polymerization period, etc., and achieve excellent thermal stability The effect of stability, short preparation period and short reaction period

Active Publication Date: 2020-06-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the required temperature of this method is not high, the disadvantage is that its polymerization period is too long, up to one week, and the obtained poly(octylene glycol-citrate) ester elastomer has no memory
[0010] Biodegradable polyester shape memory materials based on citric acid raw materials. For the selection of diol raw materials, most of the research has focused on 1,12-dodecanediol and 1,8-octanediol. There is no report on the preparation of shape memory materials using 1,10-decanediol or shorter chain 1,4-butanediol or a combination of the two

Method used

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  • A kind of polyester shape memory material and preparation method thereof
  • A kind of polyester shape memory material and preparation method thereof
  • A kind of polyester shape memory material and preparation method thereof

Examples

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Embodiment 1

[0038] A polyester shape memory material, which is polymerized from diol and citric acid at a molar ratio of 3:2, and the diol is 1,10-decanediol.

[0039] The preparation method of above-mentioned material, comprises the following steps:

[0040] (1) Take 1,4-butanediol (0mol; 0g), 1,10-decanediol (0.0285mol; 5.00g) and citric acid (0.019mol; 4.00g) and mix them with nitrogen gas for 20 minutes; Melt at 165°C, stir and polymerize for 20 minutes, then lower the temperature to 140°C, and stir for 30 minutes to increase the viscosity of the reaction system to obtain a prepolymer;

[0041] (2) Drop-coat or spin-coat the prepolymer onto a glass slide, put it in a vacuum oven, and cross-link for 20 hours at 80°C; The ester shape memory material is designated as sample 1.

Embodiment 2

[0043] A polyester shape memory material, which is polymerized by diol and citric acid with a molar ratio of 3:2, the diol is a mixture of 1,10-decanediol and 1,4-butanediol, 1, The mole of 4-butanediol is 7% of the total mole of glycols.

[0044] Compared with Example 1, the preparation method of the above materials differs in that the amount of 1,4-butanediol added in step (1) is 0.002 mol, and the amount of 1,10-decanediol added is 0.0265 mol, to obtain butane The polyester shape memory material with a diol content of 7% is designated as sample 2.

Embodiment 3

[0046] A polyester shape memory material, compared with Example 2, the difference is that the mole of 1,4-butanediol is 18% of the total mole of diols.

[0047] Compared with Example 2, the preparation method of the above materials differs in that: in step (1), the amount of 4-butanediol added is 0.005 mol, and the amount of 1,10-decanediol added is 0.0235 mol, to obtain butanediol A polyester shape memory material with an alcohol content of 18% is designated as sample 3.

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Abstract

The invention belongs to the field of functional polymer materials and discloses a shape-memory polyester material. The shape-memory polyester material is formed by polymerization of dihydric alcoholand citric acid. The dihydric alcohol is 1,10-decamethylene glycol or a mixture of the 1,10- decamethylene glycol and 1,4-butanediol. The prepared shape-memory polyester material is high in biodegradability and excellent in shape memory performance. The invention further discloses a preparation method of the shape-memory polyester material. The preparation method includes: (1) melt blending certain amounts of dihydric alcohol and citric acid, and stirring to polymerize to obtain a precursor; (2) placing the precursor in a vacuum oven, and enabling to crosslink for 20 hours at the temperature of 75-85 DEG C to obtain the shape-memory polyester material. The preparation method is simple and short in period.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, in particular to a polyester shape-memory material polymerized by glycol and citric acid and a preparation method thereof. Background technique [0002] Shape memory polymer material is a smart material that can change its shape repeatedly according to external stimuli. Because of its advantages of light weight, durability, strong controllability, and large deformation, this kind of polymer material has broad application prospects in aerospace, medical equipment, smart packaging, tissue engineering and other fields. There are many kinds of shape memory polymer materials, and the preparation process is also different. However, with the proposal and implementation of the sustainable development strategy, the research and development of a new type of shape memory polymer material that is fully bio-based, green and environmentally friendly has become the focus of attention. focus. Among ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/20C08G63/78
CPCC08G63/20C08G63/78C08G2230/00C08G2280/00
Inventor 陈金周范国超刘旭影杨会歌牛明军刘文涛
Owner ZHENGZHOU UNIV
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