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Synthesis method of underwater self-healing lipophilic polymer

A synthesis method and polymer technology, applied in the chemical industry, can solve problems such as the difficulty of polymer repair, and achieve the effect of overcoming the interaction of water shielding macromolecules

Inactive Publication Date: 2016-12-07
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides a synthesis method of a lipophilic polymer capable of self-repairing underwater without human intervention, which solves the problem of repairing the polymer in water in the prior art. difficult question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Thin film sample experiment.

[0021] ①Dissolve 5g of polyethylene and polytetrahydrofuran in 12.5g of dimethylformamide. 2.5g of isocyanate was dissolved in 10g of dimethylformamide. Under the condition of 60° C., 3 drops of dibutyltin dilaurate were used as a catalyst to prepolymerize the above two solutions for 6 hours under stirring in dry nitrogen to synthesize hyperbranched polyester.

[0022] ②Under the condition of 60°C, dissolve 0.5 g of hyperbranched polyester in 5 g of dimethylformamide in the polymerization solution, and stir for 3 hours. A mixture of 0.5 g of dimethylol propionic acid and hydroxyethyl acrylate was dissolved in 3 g of dimethylformamide, and the two solutions were mixed and reacted for 2 hours, and then the temperature dropped to 20°C.

[0023] ③ Dissolve 1.0 g of dopamine hydrochloride in 25.5 g of dimethylformamide, mix it with the solution in step ②, add triethylamine dropwise to neutralize excess hydrochloric acid, and con...

Embodiment 2

[0026] Embodiment 2: dumbbell-shaped sample experiment.

[0027] ① Dissolve 5g of polyethylene and polytetrahydrofuran in 12.5g of dimethylformamide. 2.5g of isocyanate was dissolved in 10g of dimethylformamide. Under the condition of 60° C., 3 drops of dibutyltin dilaurate were used as a catalyst to prepolymerize the above two solutions for 6 hours under stirring in dry nitrogen to synthesize hyperbranched polyester.

[0028] ②Under the condition of 60°C, dissolve 0.5 g of hyperbranched polyester in 5 g of dimethylformamide in the polymerization solution, and stir for 3 hours. A mixture of 0.5 g of dimethylol propionic acid and hydroxyethyl acrylate was dissolved in 3 g of dimethylformamide, and the two solutions were mixed and reacted for 2 hours, and then the temperature dropped to 20°C.

[0029] ③ Dissolve 1.0 g of dopamine hydrochloride in 25.5 g of dimethylformamide, mix it with the solution in step ②, add triethylamine dropwise to neutralize excess hydrochloric acid, ...

Embodiment 3

[0032] Embodiment 3: block sample experiment.

[0033] ①Dissolve 5g of polyethylene and polytetrahydrofuran in 12.5g of dimethylformamide. 2.5g of isocyanate was dissolved in 10g of dimethylformamide. Under the condition of 60° C., 3 drops of dibutyltin dilaurate were used as a catalyst to prepolymerize the above two solutions for 6 hours under stirring in dry nitrogen to synthesize hyperbranched polyester.

[0034] ② Dissolve 0.5 g of hyperbranched polyester in 5 g of dimethylformamide in the polymerization solution at 60°C, and stir for 3 hours. A mixture of 0.5 g of dimethylol propionic acid and hydroxyethyl acrylate was dissolved in 3 g of dimethylformamide, and the two solutions were mixed and reacted for 2 hours, and then the temperature dropped to 20°C.

[0035] ③ Dissolve 1.0 g of dopamine hydrochloride in 25.5 g of dimethylformamide, mix it with the solution in step ②, add triethylamine dropwise to neutralize excess hydrochloric acid, and continue the reaction for 1...

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PUM

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Abstract

The invention discloses a synthesis method of a lipophilic polymer capable of self-healing underwater. The synthesis method comprises the following steps: synthesizing hyperbranched polyester in a polymerization solution; dissolving the hyperbranched polyester in an organic solvent solution, mixing an obtained mixture I, and then making the mixed mixture I generate a reaction; adding the mixture I into an alkaline solution, making an obtained mixture II generate a neutralization reaction, adding the mixture II into an organic solvent containing a metal salt, and meanwhile adding an alkaline solution into an obtained mixture III to control the PH of the solution; after the reaction is completed, freeze-drying the solution in a freeze-dryer, taking out a solid product which is called as polymer A for short. The polymer has structures of coordination bonds of metal ions, and is enabled to overcome the phenomenon that water-shielding macromolecules interact in a remolding process of a conventional polymer; a coordination structure is activated in an alkaline condition; a movable hyperbranched polymer network is enabled to be capable of passing through a crack interface to be recombined; in the remolding process of the novel polymer, seawater becomes a necessary environment for guaranteeing an effective interaction of raw materials.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a synthesis method of a lipophilic polymer capable of self-healing underwater. Background technique [0002] With the development of the economy, the requirements for the reliability and durability of polymers and polymer composites in the application process of marine industry are getting higher and higher. However, until now, there has been no reasonable and feasible solution for the self-healing of solid polymers underwater. Traditional methods of adding healing agents are inhibited in water. In the self-healing process, since polymers are often lipophilic, the participation of water in the reaction process will form a certain interface to prevent the diffusion and collision of polymer chains. The repair of polymers in water is very difficult due to the reduced Hamaker constant (van der Waals attraction energy) in water and the reduction of electrostati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/006C08G83/005
Inventor 刘美赵德智
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY