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Self-repaired graphene oxide/polyurethane composite material and preparation method thereof

A composite material and graphene technology, which is applied in the field of graphene oxide/polyurethane composite material and its preparation, can solve the problem of low mechanical strength of supramolecular polyurethane, without sacrificing self-healing performance, easy synthesis process, and cheap and easy-to-obtain raw materials Effect

Active Publication Date: 2017-05-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength of this supramolecular polyurethane obtained only by non-covalent interactions is not high

Method used

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  • Self-repaired graphene oxide/polyurethane composite material and preparation method thereof
  • Self-repaired graphene oxide/polyurethane composite material and preparation method thereof
  • Self-repaired graphene oxide/polyurethane composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Preparation of polyurethane with quadruple hydrogen bond units: in parts by mass, 40 parts of polyethylene glycol and 3 parts of 1,4-butanediol were mixed and stirred evenly and dehydrated, and 20 parts of Isophorone diisocyanate, after adding, make the reaction system react at a temperature of 85°C for 2 hours to obtain a polyurethane prepolymer; 15 parts of 2-amino-4-carbonyl-6-methylpyrimidine and 50 parts of Mix dimethyl sulfoxide and stir at a temperature of 85°C; after the 2-amino-4-carbonyl-6-methylpyrimidine is completely dissolved, add the polyurethane prepolymer and 0.2 parts of dilauric acid di Butyl tin, reacted at 85°C for 15 hours; after the reaction, precipitated with ether, filtered to obtain a white solid, and dried in vacuum to obtain polyurethane with quadruple hydrogen bond units;

[0041] Preparation of graphene oxide with quadruple hydrogen bond motifs: in parts by mass, 1 part (the amount of 2-amino-4-carbonyl-6-methylpyrimidine accounts for 6.25%...

Embodiment 2

[0049] Preparation of polyurethane with quadruple hydrogen bond units: in parts by mass, 60 parts of polyethylene glycol and 2 parts of 1,4-butanediol were mixed and stirred evenly and dehydrated, and 20 parts of Diphenylmethane-4,4'-diisocyanate, after the addition, the reaction system was reacted at a temperature of 70°C for 4 hours to obtain a polyurethane prepolymer; 13 parts of 2-amino-4-carbonyl-6-methyl The base pyrimidine is mixed with 50 parts of dimethyl sulfoxide, and stirred at a temperature of 85°C; after the 2‐amino‐4‐carbonyl‐6‐methylpyrimidine is completely dissolved, the polyurethane prepolymer and 0.2 Parts of dibutyltin dilaurate were reacted at 85°C for 16 hours; after the reaction, precipitated with ether, filtered to obtain a white solid, and vacuum-dried to obtain a polyurethane with a quadruple hydrogen bond;

[0050] Preparation of graphene oxide with quadruple hydrogen bond motifs: in parts by mass, 1 part (the amount of 2-amino-4-carbonyl-6-methylpyr...

Embodiment 3

[0054] Preparation of polyurethane with quadruple hydrogen bond units: in parts by mass, 30 parts of polytetrahydrofuran diol and 2 parts of 1,4-butanediol were mixed and stirred evenly and dehydrated, and 16 parts of Isophorone diisocyanate, after adding, make the reaction system react at a temperature of 80°C for 3.5 hours to obtain a polyurethane prepolymer; 15 parts of 2-amino-4-carbonyl-6-methylpyrimidine and 50 parts of Mix dimethyl sulfoxide and stir at a temperature of 70°C; after the 2-amino-4-carbonyl-6-methylpyrimidine is completely dissolved, add the polyurethane prepolymer and 0.2 parts of dilauric acid di Butyltin, reacted at 70°C for 24 hours; after the reaction, precipitated with ether, filtered to obtain a white solid, and vacuum-dried to obtain polyurethane with quadruple hydrogen bond units;

[0055] Preparation of graphene oxide with quadruple hydrogen bond motifs: in parts by mass, 1 part (the amount of 2-amino-4-carbonyl-6-methylpyrimidine accounts for 6....

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Abstract

The invention discloses a self-repaired graphene oxide / polyurethane composite material and a preparation method thereof. The preparation method comprises the following steps: performing a reaction on 2-amino-4-carbonyl-6-methylpyrimidine with an amino, polyisocyanate, polyester polyol or polyether polyol and a chain extender to synthesize polyurethane with quadruple hydrogen bonding units; adding 2-amino-4-carbonyl-6-methylpyrimidine into polyisocyanate to react to synthesize isocyanate with quadruple hydrogen bonding units, and then performing a reaction on the isocyanate and graphene oxide to obtain graphene oxide with quadruple hydrogen bonding units; and finally, compounding the polyurethane with quadruple hydrogen bonding units and the graphene oxide with the quadruple hydrogen bonding units to obtain the self-repaired graphene oxide / polyurethane composite material. The self-repaired graphene oxide / polyurethane composite material prepared by the invention can realize self-repair of the material without any additional repair agents and requirements on special environments. The material is simple in synthetic process and the repair rate reaches up to 85%.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a graphene oxide / polyurethane composite material with self-repairing properties and a preparation method thereof. Background technique [0002] Supramolecular polymer materials refer to materials prepared by utilizing intermolecular non-covalent bonding (such as hydrogen bond interactions, donor-acceptor interactions, ionic interactions, and hydrophobic interactions). Compared with traditional polyurethane, supramolecular polyurethane formed based on supramolecular polymer chemistry has great differences in many aspects such as preparation method, structure and performance, and has become a hot field of polyurethane material research. The reversible non-covalent bonds between supramolecular polyurethane molecules can endow it with excellent self-healing properties, thereby improving the safety and service life of polyurethane materials. Chinese invention patent app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K9/04C08K3/04C08G18/66C08G18/48C08G18/32C08G18/28
Inventor 林殷雷李光吉易鹏
Owner SOUTH CHINA UNIV OF TECH
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