Hyperbranched polyurethane having self-repairing function in seawater as well as preparation method and application thereof

A hyperbranched polyurethane and self-healing technology, applied in the field of hyperbranched polyurethane and its preparation, can solve the problems of poor mechanical properties, meticulous research on characteristics, inability to use large-scale equipment, etc., to achieve good mechanical properties, increase crosslinking density, The effect of strong self-healing function

Active Publication Date: 2015-03-04
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current research on mussel biomimetic polymers focuses on hydrogel materials or bioadhesives, which have poor mechanical properties and cannot be used for large-scale equipment in marine

Method used

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  • Hyperbranched polyurethane having self-repairing function in seawater as well as preparation method and application thereof
  • Hyperbranched polyurethane having self-repairing function in seawater as well as preparation method and application thereof
  • Hyperbranched polyurethane having self-repairing function in seawater as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Preparation of polyurethane prepolymer

[0066] Under the protection of high-purity nitrogen, 200 parts of polyethylene glycol (molecular weight is 800g / mol) are added in the there-necked flask, then in the there-necked flask, add 500mL N, N-dimethylformamide (DMF), stir in mechanical Dissolve the above-mentioned polyethylene glycol completely under the conditions, then add 111 parts of isophorone diisocyanate to the above-mentioned mixed solution through a constant pressure dropping funnel, after mixing evenly, add 0.15 parts of dibutyltin dilaurate to adjust the reaction system. The temperature is 40°C, and the polyurethane prepolymer is prepared after 24 hours of reaction.

[0067] (2) Preparation of hyperbranched polyurethane containing dopamine

[0068] Take a hydroxyl-terminated hyperbranched polyester with a terminal hydroxyl number of 4 and a molecular weight of 1000 g / mol. Dissolve 15.6 parts of the above-mentioned polyester in 100 mL of DMF, and then add ...

Embodiment 2

[0075] (1) Preparation of polyurethane prepolymer

[0076] Under the protection of high-purity nitrogen, 200 parts of polytetrahydrofuran (molecular weight is 5000g / mol) are added in the three-necked flask, then in the three-necked flask, add 500mL N, N-dimethylformamide, polytetrahydrofuran is mixed under mechanical stirring condition Dissolve completely, then dissolve 13.2 parts of dimethyl biphenyl diisocyanate in 100mL DMF, add into the reaction system through a constant pressure dropping funnel, after mixing evenly, add 0.2 part of dibutyltin dilaurate, adjust the temperature of the reaction system to 80°C, react for 4 hours to prepare polyurethane prepolymer.

[0077] (2) Preparation of hyperbranched polyurethane containing dopamine

[0078] Dissolve 1 part of hydroxyl-terminated hyperbranched polyester with a terminal hydroxyl number of 36 and a molecular weight of 3600 g / mol in 100 mL of DMF, then add it to the reaction system through a constant-pressure dropping funn...

Embodiment 3

[0085] (1) Preparation of polyurethane prepolymer

[0086] Under the protection of high-purity nitrogen, 200 parts of polypropylene glycol (molecular weight is 2000g / mol) is added in the three-necked flask, then in the three-necked flask, add 500mL N, N-dimethylformamide, under the condition of mechanical stirring, the above poly Propylene glycol is completely dissolved. Dissolve 23.2 parts of p-phenylene diisocyanate in 100 mL of DMF, and then add it into the reaction system through a constant pressure dropping funnel. After mixing evenly, add 0.18 parts of dibutyltin dilaurate, and adjust the temperature of the reaction system to 60°C , After 12 hours of reaction, the polyurethane prepolymer was prepared.

[0087] (2) Preparation of hyperbranched polyurethane containing dopamine

[0088] Take 3.5 parts of hydroxyl-terminated hyperbranched polyester with terminal hydroxyl number of 12 and molecular weight of 1250 g / mol and dissolve it in 100 mL of DMF, then add it to the rea...

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Abstract

The invention discloses hyperbranched polyurethane having self-repairing function in seawater. The hyperbranched polyurethane is prepared from the following raw materials in parts by weight: 213-311 parts of isocyanate-terminated polyurethane prepolymer, 1-16.7 parts of polyhydroxy-terminated hyperbranched polyester, 0.7-18.6 parts of 2,2-dihydromethyl propionic acid, 1-23.7 parts of dopamine hydrochloride and 0.3-6.7 parts of FeCl3. The invention also provides a preparation method and application of hyperbranched polyurethane. A coordination interaction occurs between hyperbranched polyurethane and a pyrocatechol structure in dopamine by virtue of Fe<3+> so as to improve the mechanical properties of the polymer and endow the polymer with the self-repairing function in seawater; the repairing efficiency reaches up to 87% and the polymer has repeated adhesive property in seawater.

Description

technical field [0001] The invention relates to the field of self-healing polymer materials, in particular to a hyperbranched polyurethane with self-healing function in seawater, its preparation method and application. Background technique [0002] In the marine environment, due to the impact of wave erosion and rock collision, the equipment materials used in the marine environment are easily damaged, thereby reducing the service life of these equipment materials, especially in extremely harsh oceans such as ships and drilling platforms. environment, it is necessary to coat multiple layers of marine coatings with different protective properties on the surface of the hull for protection. However, the cracks on the surface of the coating due to aging will develop rapidly due to the penetration of seawater until the entire coating falls off and fails. Therefore, it is of great significance to improve the service life of coating materials in the marine environment and improve t...

Claims

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Application Information

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IPC IPC(8): C08G18/83C08G18/66C08G18/42C08G18/34C08G18/32C08G18/10C09D175/06C09D5/16
CPCC08G18/12C08G18/4018C08G18/4202C08G18/4833C08G18/4854C08G18/5024C08G18/6625C08G18/6659C08G18/838C09D5/1662C09D175/06C08G18/3275
Inventor 容敏智夏南南章明秋
Owner SUN YAT SEN UNIV
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