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Body-temperature-response 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: 2020-04-10
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-response shape memory polyurethane material and preparation method thereof
  • Body-temperature-response shape memory polyurethane material and preparation method thereof
  • Body-temperature-response 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 the soft segment, isophorone diisocyanate, hexamethylene diisocyanate and chain extender 1 ,4-Butanediol is a hard segment, prepared with dibutyltin dilaurate as a catalyst and dimethyl carbonate as a green solvent. The amount of each raw material in grams and milliliters is as follows: Among them, 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 of dimethyl carbonate is 20.8-24.9%, 10-15 ml, dimethyl carbonate The second addition of ester is 31.2~37.4%, 10~15 ml.

[0025] A method for preparing a body temperature responsive shape memory polyurethane material is prepared according to the following steps:

[0026] Step 1) Put 10g of...

Embodiment 2

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

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

[0035] Step 2) After the polycaprolactone diol is fully melted, it is cooled to room temperature, 1.0 ml of hexamethylene diisocyanate is added, and the temperature is gradually increased to 60°C, electric stirring, and fully reacted for 3 hours;

[0036] Step 3) Add 3.6 ml of isophorone diisocyanate, add 10 ml of solvent dimethyl carbonate, and stir for 30 minutes with electric power;

[0037] Step 4) Add 0.05 ml of the catalyst dibutyl tin dilaurate and fully react 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 of the reaction, ad...

Embodiment 3

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

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

[0043] Step 2) After the polycaprolactone diol is fully melted, it is cooled down to room temperature, 1.3 ml of hexamethylene diisocyanate is added, and the temperature is gradually raised to 60°C, electric stirring, and fully reacted for 3 hours;

[0044] Step 3) Add 4.2 ml of isophorone diisocyanate, add 10 ml of solvent dimethyl carbonate, and stir for 30 minutes with electric power;

[0045] Step 4) Add 0.05 ml of the catalyst dibutyl tin dilaurate and fully react 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 ...

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Abstract

The invention relates to the technical field of shape memory materials, and particularly relates to a body-temperature-response shape memory polyurethane material and a preparation method thereof. Thematerial is prepared by adopting poly(epsilon-caprolactone) diol with relative molecular weight of 2000 as soft segments, adopting isophorone diisocyanate, hexamethylene diisocyanate and chain extender 1,4-butanediol as rigid segments, adopting dibutyltin dilaurate as a catalyst and adopting dimethyl carbonate as a green solvent. The raw materials include 23-30 parts of the poly(epsilon-caprolactone) diol, 2-6 parts of the hexamethylene diisocyanate, 6-11 parts of the isophorone diisocyanate, 3-5 parts of the 1,4-butanediol, and 0.10-0.12 parts of the dibutyltin dilaurate, with the amount ofthe dimethyl carbonate added in the first time being 20-25 parts and the amount of the dimethyl carbonate added in the second time being 31-38 parts. The body-temperature-response shape memory polyurethane material has good shape memory performance, and body temperature responsive and shape recovery characteristics allow the polyurethane material to have a broad application prospect in the fieldsof biomedicine, wearable sensors and intelligent 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 response shape memory polyurethane material with body temperature response function and a preparation method thereof. Background technique [0002] After being designed and processed into a device, the shape memory material can operate like a programmable machine. It has the "perception" of external stimuli. After sensing the external stimulus, the shape memory material will "remember" the initial permanent shape and realize the shape Controllable changes. Among them, shape memory polyurethane is more and more favored by researchers due to its high stretchable deformation, low density and easy programming of temporary shapes. Shape memory polyurethane is used in biomedical, aerospace, and flexible wearables. Research in the field of sensors and smart textile fibers is becoming more and more extensive. However, the technology for developi...

Claims

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Application Information

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Patent Type & Authority Applications(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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