Preparation method of epoxy resin composite material based on quadruple hydrogen bond supermolecular self repairing

A technology of epoxy resin and composite materials, which is applied in the field of preparation of functional materials, can solve problems such as poor mechanical properties, long repair time, and low repair efficiency, and achieve the effects of simple preparation, high conversion rate, and controllable design

Inactive Publication Date: 2018-10-30
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most intrinsic self-healing polymers have poor mechanical properties, and some intrinsic self-healing polymer materials with better mechanical properties have problems such as long repair time and low repair efficiency.

Method used

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  • Preparation method of epoxy resin composite material based on quadruple hydrogen bond supermolecular self repairing
  • Preparation method of epoxy resin composite material based on quadruple hydrogen bond supermolecular self repairing

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0030] (1) Synthon preparation

[0031] Weigh 2-amino-4-hydroxy 6-methylpyrimidine and hexamethylene diisocyanate with a mass ratio of 1:10, heat up to 90°C under the protection of dry nitrogen, and react with electromagnetic stirring for 26 hours. After the reaction is completed, cool down to room temperature , add water-removing n-hexane, precipitate, suction filter, and wash until the filtrate is verified by infrared spectroscopy to be free of hexamethylene diisocyanate, and the white powder obtained is a synthon, which is stored in a liquid seal with n-hexane.

[0032] (2) Preparation of supramolecular chloroform solution

[0033] The synthon that step (1) obtains and polyether amine D2000 are with molar ratio n (-NCO) :n (-NH2) = After mixing at a ratio of 1:1, add an appropriate amount of chloroform, and add a little catalyst di-n-butyltin dilaurate. Under the condition of dry nitrogen protection, heat up to 65°C, electromagnetically stir and reflux until the infrared ...

specific Embodiment approach 2

[0037] (1) Synthon preparation

[0038] Weigh 2-amino-4-hydroxy 6-methylpyrimidine and hexamethylene diisocyanate with a mass ratio of 1:10, heat up to 90°C under the protection of dry nitrogen, and react with electromagnetic stirring for 26 hours. After the reaction is completed, cool down to room temperature , add water-removing n-hexane, precipitate, suction filter, and wash until the filtrate is verified by infrared spectroscopy to be free of hexamethylene diisocyanate, and the white powder obtained is a synthon, which is stored in a liquid seal with n-hexane.

[0039] (2) Preparation of supramolecular chloroform solution

[0040] The neutral synthon that step (1) obtains and polyether alcohol 2120 are n in molar ratio (-NCO) :n (-OH) = After mixing at a ratio of 1:1, add an appropriate amount of chloroform, and add a little catalyst di-n-butyltin dilaurate. Under the condition of dry nitrogen protection, heat up to 65°C, electromagnetically stir and reflux until the inf...

specific Embodiment approach 3

[0044] (1) Synthon preparation

[0045] Weigh 2-amino-4-hydroxy 6-methylpyrimidine and hexamethylene diisocyanate with a mass ratio of 1:10, heat up to 90°C under the protection of dry nitrogen, and react with electromagnetic stirring for 26 hours. After the reaction is completed, cool down to room temperature , add water-removing n-hexane, precipitate, suction filter, and wash until the filtrate is verified by infrared spectroscopy to be free of hexamethylene diisocyanate, and the white powder obtained is a synthon, which is stored in a liquid seal with n-hexane.

[0046] (2) Preparation of supramolecular chloroform solution

[0047] The synthon that step (1) obtains and hydroxyl-terminated polybutadiene HTPB are n in molar ratio (-NCO) :n (-OH) = After mixing at a ratio of 1:1, add an appropriate amount of chloroform, and add a little catalyst di-n-butyltin dilaurate. Under the condition of dry nitrogen protection, heat up to 65°C, electromagnetically stir and reflux until...

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Abstract

The invention provides a preparation method of an epoxy resin composite material based on quadruple hydrogen bond supermolecular self repairing. The preparation method comprises the following steps: preparing a quadruple hydrogen bond-based supermolecular self-repairing component by taking 2-amino-4-hydroxyl-6-methyl pyridine, hexamethylene diisocyanate and a terminal amino or terminal hydroxyl polymer as raw materials, dissolving and blending epoxy resin containing the quadruple hydrogen bond and a supermolecule in a solution to form a homogeneous mixing system, removing a solvent by a heating and vacuumizing mode, adding a curing agent, and curing to obtain the self-repairing epoxy resin composite material. The composite material prepared according to the preparation method has excellentheat stability and high mechanical property, has a certain self-repairing capability, improves the reliability in the use period and prolongs the service life of the material; furthermore, the sources of the raw materials are wide, and the preparation method has the characteristics of simple process, high practicability, high applicability and the like.

Description

technical field [0001] The invention relates to a method for preparing functional materials, in particular to a method for preparing self-repairing epoxy resin composite materials. Background technique [0002] Epoxy resin and its composite materials are increasingly used in industries such as aircraft, automobiles, ships and construction, and penetrate into every aspect of our lives. Epoxy resin is susceptible to damage caused by mechanical, chemical, thermal, ultraviolet radiation and other factors during processing and use, resulting in the formation of micro-cracks, affecting the structural integrity of the polymer, resulting in performance degradation, increased maintenance costs, and safety hazards. Hidden danger. Traditional research has focused on the design of new materials and the repair of visible or detectable damage on polymeric structures. These traditional maintenance methods are ineffective for invisible microcracks in the structure of the material during i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L75/08C08L75/04C08G18/78
CPCC08L63/00C08G18/7887C08L75/08C08L75/04
Inventor 魏浩荆莹欧阳肖高闪李瑞张智嘉马宁张馨月王国军王强
Owner HARBIN ENG UNIV
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