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High-strength self-repairing waterborne polyurethane composite material and preparation method thereof

A technology of water-based polyurethane and composite materials, which is applied in the fields of polymer synthesis and intelligent polymer materials, and achieves the effects of good coordination interaction, improved tensile strength, and increased glass transition temperature.

Active Publication Date: 2021-06-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that it is difficult for current self-healing polyurethane materials to take into account high strength and fast self-healing performance at the same time.

Method used

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  • High-strength self-repairing waterborne polyurethane composite material and preparation method thereof
  • High-strength self-repairing waterborne polyurethane composite material and preparation method thereof
  • High-strength self-repairing waterborne polyurethane composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A method for enhancing the mechanical properties and thermomechanical properties of self-healing water-based polyurethane by using ferroferric oxide, the specific steps are as follows:

[0045] 1. Preparation of oleic acid-modified ferroferric oxide magnetic nanoparticles

[0046] 42mL of cyclohexane, 24mL of absolute ethanol and 18mL of water were placed in a three-necked flask (volume ratio 7:4:3), and nitrogen gas was continuously passed for 30min to remove dissolved oxygen. Then weigh 2.16g FeCl 3 ·6H 2 O, 0.79g FeCl 2 4H 2 O, 4.87g of C 18 h 33 o 2 Na and 1.12g NaOH were sequentially added to the above mixed solution, and the mixture was mechanically stirred under a nitrogen atmosphere, and refluxed at 68° C. for 4 h. After the reflux, the flask was removed from the oil bath and cooled to room temperature. After the product was precipitated with ethanol and magnetically separated, the supernatant liquid was decanted, then ultrasonically dispersed with deioni...

Embodiment 2

[0054] A method for enhancing the mechanical properties and thermomechanical properties of self-healing water-based polyurethane by using ferroferric oxide, the specific steps are as follows:

[0055] 1. Preparation of oleic acid-modified ferroferric oxide magnetic nanoparticles

[0056] 42mL of cyclohexane, 24mL of absolute ethanol and 18mL of water were placed in a three-necked flask (volume ratio 7:4:3), and nitrogen gas was continuously passed for 30min to remove dissolved oxygen. Then weigh 2.16g FeCl 3 ·6H 2 O, 0.79g FeCl 2 4H 2 O, 4.87g of C 18 h 33 o 2 Na and 1.12g NaOH were sequentially added to the above mixed solution, and the mixture was mechanically stirred under a nitrogen atmosphere, and refluxed at 68° C. for 4 h. After the reflux, the flask was removed from the oil bath and cooled to room temperature. After the product was precipitated with ethanol and magnetically separated, the supernatant liquid was decanted, then ultrasonically dispersed with deioni...

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Abstract

The invention relates to a green and environment-friendly waterborne polyurethane material capable of realizing high strength and self-repairing performance based on a metal organic coordination bond and a preparation method of the green and environment-friendly waterborne polyurethane material, and belongs to the field of polymer synthesis and intelligent polymer materials. The invention provides a high-strength self-repairing waterborne polyurethane composite material. The composite material is prepared from catechol-terminated waterborne polyurethane and a metal oxide through a coordination reaction. According to the invention, metal oxides such as ferroferric oxide nanoparticles and the like are selected as reinforcing fillers, and the characteristics of excellent self-repairing and stimulation response of metal-organic ligand coordinate bonds are utilized, so that the high-strength rapid self-repairing waterborne polyurethane composite material is obtained.

Description

technical field [0001] The invention relates to a green and environment-friendly water-based polyurethane material with high strength and self-repairing performance based on metal-organic coordination bonds and a preparation method thereof, belonging to the fields of polymer synthesis and intelligent polymer materials. Background technique [0002] Water-based polyurethane replaces organic solvents with water, retains the excellent characteristics of traditional polyurethane, and has the advantages of being green, non-toxic and easy to modify. It is a promising multifunctional polymer material, widely used in coatings, paints, adhesives and other fields. However, because it is often exposed to the environment during use, it will inevitably be subjected to external collisions, scratches, chemical corrosion, photoaging or a combination of effects, resulting in micro-cracks and cracks on the inside or outside, making it lose use potency. Inspired by living organisms to repair...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/001
Inventor 孔米秋徐文卿吕亚栋黄亚江李光宪
Owner SICHUAN UNIV
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