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Body temperature responsive shape memory polyurethane material and preparation method thereof

A polyurethane material and shape-responsive technology, applied in the field of shape memory materials, can solve the problems of incompatibility between two phases, and achieve the effects of excellent environmental performance, good shape memory performance, and low toxicity

Active Publication Date: 2021-11-26
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology for the development of shape memory polyurethane with body temperature response function is not yet mature at home and abroad. Most of the shape memory materials with body temperature response researched at present are blend materials, and there is a problem of two-phase incompatibility.

Method used

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  • Body temperature responsive shape memory polyurethane material and preparation method thereof
  • Body temperature responsive shape memory polyurethane material and preparation method thereof
  • Body temperature responsive shape memory polyurethane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: A body temperature responsive shape memory polyurethane material, using polyε-caprolactone diol with a relative molecular weight of 2000 as a soft segment, isophorone diisocyanate, hexamethylene diisocyanate and chain extender 1 , 4-butanediol is a hard segment, takes dibutyltin dilaurate as a catalyst and takes dimethyl carbonate as a green solvent to make, and the consumption grams and milliliters of each raw material are as follows: wherein polyε-caprolactone diol 23.1~29.3%, 10~15 g, hexamethylene diisocyanate 2.2~5.3%, 0.9~2.6 ml, isophorone diisocyanate 6.2~10.5%, 2.5~5.1 ml, 1,4-butane Diol is 3.5~4.6%, 1.5~2.3 ml, dibutyltin dilaurate is 0.10~0.12%, 0.05 ml, the first addition amount of dimethyl carbonate is 20.8~24.9%, 10~15 ml, dimethyl carbonate The second addition amount of ester is 31.2-37.4%, 10-15 ml.

[0025] A preparation method of a body temperature responsive shape memory polyurethane material, the body temperature responsive shape memory ...

Embodiment 2

[0033] Example 2: Prepare body temperature responsive shape memory polyurethane material according to the following steps:

[0034] Step 1), put 10 g of polycaprolactone diol dried by rotary evaporation into a three-necked flask with nitrogen gas, oil bath at 60°C, and electric stirring for 1 hour to completely melt the polycaprolactone diol;

[0035] Step 2), after fully melting the polycaprolactone diol, the temperature is lowered to room temperature, 1.0 ml of hexamethylene diisocyanate is added, the temperature is gradually raised to 60°C, and the electric stirring is carried out to fully react for 3 hours;

[0036] Step 3), add 3.6 ml of isophorone diisocyanate, add 10 ml of solvent dimethyl carbonate, stir electrically for 30 minutes;

[0037] Step 4), adding 0.05 ml of catalyst dibutyltin dilaurate, and fully reacting for 1 hour to obtain a prepolymer;

[0038] Step 5), add 1.5 ml of 1,4-butanediol, carry out chain extension reaction, fully react for 4 hours to the end...

Embodiment 3

[0041] Example 3: Prepare body temperature responsive shape memory polyurethane material according to the following steps:

[0042] Step 1), put 12 g of polycaprolactone diol dried by rotary evaporation into a three-necked flask filled with nitrogen, oil bath at 60°C, and electric stirring for 1 hour to completely melt the polycaprolactone diol;

[0043] Step 2), after fully melting the polycaprolactone diol, drop to room temperature, add 1.3 ml of hexamethylene diisocyanate, gradually heat up to 60°C, stir with electric power, and fully react for 3 hours;

[0044] Step 3), add 4.2 ml of isophorone diisocyanate, add 10 ml of solvent dimethyl carbonate, stir electrically for 30 minutes;

[0045] Step 4), adding 0.05 ml of catalyst dibutyltin dilaurate, and fully reacting for 1 hour to obtain a prepolymer;

[0046] Step 5), add 1.8 ml of 1,4-butanediol, carry out chain extension reaction, fully react for 4 hours to the end of the reaction, add 15 ml of solvent dimethyl carbonat...

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Abstract

The invention relates to the technical field of shape memory materials, in particular to a body temperature responsive shape memory polyurethane material and a preparation method thereof, which uses polyε-caprolactone diol with a relative molecular weight of 2000 as the soft segment, and isophorone diisocyanate, Hexamethylene diisocyanate and chain extender 1,4-butanediol are used as hard segments, dibutyltin dilaurate is used as a catalyst, and dimethyl carbonate is used as a green solvent. The proportions of each raw material are as follows: Among them, polyε-caprolactone diol is 23-30 parts, hexamethylene diisocyanate is 2-6 parts, isophorone diisocyanate is 6-11 parts, 1,4-butanediol is 3-5 parts parts, dibutyltin dilaurate is 0.10-0.12 parts, the first addition amount of dimethyl carbonate is 20-25 parts, the second addition amount of dimethyl carbonate is 31-38 parts, the body temperature response prepared by the present invention Shape memory polyurethane materials have good shape memory properties, and their body temperature-responsive shape recovery characteristics make them have broad application prospects in the fields of biomedicine, wearable sensors, and smart textile fibers.

Description

technical field [0001] The invention belongs to the technical field of shape memory materials, and in particular relates to a body temperature responsive shape memory polyurethane material with body temperature response function and a preparation method thereof. Background technique [0002] After being designed and processed into devices, shape memory materials can operate like programmable machines and have a "perception" of external stimuli. After sensing external stimuli, shape memory materials will "remember" the initial permanent shape and realize the shape. controllable changes. Among them, shape memory polyurethane is increasingly favored by researchers because of its high stretchable deformation, low density and easy programming of temporary shapes. Shape memory polyurethane is used in biomedical, aerospace, flexible wearable Research in the field of sensors and smart textile fibers is becoming more and more extensive. However, the technology to develop shape memo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/42C08G18/32
CPCC08G18/4277C08G18/664C08G18/722C08G18/73C08G18/755C08G2280/00
Inventor 刘浩张培黄淼铭王玉杰何素芹刘文涛朱诚身王帅戴瑞欣
Owner ZHENGZHOU UNIV
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