Self-healing polymer material and preparation method thereof

A polymer material and self-healing technology, applied in the field of polymers, can solve the problems of low loading of repairing agent, inability to achieve multiple reversible self-repairing, restricting marketization, etc., to achieve the effect of easier adjustment of content and structure

Inactive Publication Date: 2017-11-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the microcapsule system is earlier and more extensive, but there are still many problems in the microcapsule system: such as the poor compatibility between the microcapsule and the matrix, the low loading of the repair agent in the microcapsule, and especially the inability to achieve multiple reversibility. Self-repair, etc., limiting its marketization
However, for self-healing polymers, the force of a single hydrogen bond is weak, and the intrinsic self-healing system still has the problems of high self-healing temperature and poor mechanical properties.

Method used

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  • Self-healing polymer material and preparation method thereof
  • Self-healing polymer material and preparation method thereof
  • Self-healing polymer material and preparation method thereof

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preparation example Construction

[0030] Specifically, one aspect of the present invention provides a self-healing polymer material, comprising at least one polyurethane polymer formed by random copolymerization of an oligomer diol, a chain extender, and a first diisocyanate, said The chain extenders comprise at least one multiple hydrogen bond chain extender prepared by:

[0031] Step i) reacting 2-amino-4[1H]-pyrimidinone compound with a second diisocyanate to prepare an intermediate whose terminal group is an isocyanate group;

[0032] Step ii) reacting the intermediate obtained in step i) with a diol with a single amino group to prepare a multiple hydrogen bond chain extender;

[0033] Wherein, the 2-amino-4[1H]-pyrimidinone compound is that the 5-position and / or 6-position is replaced by H, C 1-4 Alkyl or C 1-4 Hydroxyalkyl-substituted 2-amino-4[1H]-pyrimidinones.

[0034] Preferably, when the 2-amino-4[1H]-pyrimidinone compound is 5 and / or 6 by H, C 1-4 In the case of alkyl-substituted 2-amino-4[1H]-...

Embodiment 1

[0059] Synthesis of UPy-NCO end-capping agent and corresponding chain extender: by mole fraction, 1 part of 2-amino-4-carbonyl-6-methylpyrimidine was mixed with 12 parts of hexamethylene diisocyanate at 100 °C React for 18 hours under the protection of an inert gas. After the reaction is completed, cool to room temperature, add petroleum ether to precipitate, suction filter, and wash to obtain a white powder, and transfer it to a vacuum oven at 30°C to dry for 12 hours to obtain a UPy-NCO capping agent whose terminal group is isocyanate ; In molar fractions, mix 1 part of UPy-NCO with 1.2 parts of 2-amino-2-methyl-1,3-propanediol and 150 parts of dry chloroform, and reflux for 6 hours under the protection of nitrogen. After the reaction was complete, it was precipitated with petroleum ether, suction filtered and washed to obtain a chain extender with multiple hydrogen bond groups in the form of a white solid, which was dried in a vacuum oven with a yield of 68%.

[0060] Prepa...

Embodiment 2

[0065] Synthesis of UPy-NCO end-capping agent and corresponding chain extender: in mole fraction, 1 part of 2-amino-4-carbonyl-6-methylpyrimidine was mixed with 15 parts of dicyclohexylmethane diisocyanate at 100 °C React for 15 hours under the protection of an inert gas. After the reaction is completed, cool to room temperature, add cyclohexane to precipitate, suction filter, and wash to obtain a white powder, and transfer it to a vacuum oven at 30°C to dry for 12 hours to obtain UPy-NCO capped with isocyanate. agent; in mole fractions, mix 8 parts of UPy-NCO capping agent with 2 parts of 2-amino-1,3-propanediol and dry N,N-dimethylformamide, and reflux for 8 hours under nitrogen protection. After the reaction was complete, it was precipitated with petroleum ether, suction filtered and washed to obtain a white solid of multiple hydrogen bond group chain extender, which was dried in a vacuum oven with a yield of 67%.

[0066] Preparation of self-healing polymer material: In te...

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Abstract

The invention discloses a self-healing polymer material and a preparation method thereof. The self-healing polymer material comprises at least one polyurethane polymer prepared by random copolymerization reaction of a low polymer dihydric alcohol, a chain extender and a first diisocyanate, wherein the chain extender comprises at least one multiple hydrogen bond chain extender. The invention further provides a preparation method of the self-healing polymer material. The method comprises the following steps: preparing a ureido pyrimidone type end-capping reagent or chain extender, and preparing the low-temperature rapid self-healing polymer material containing quadruple hydrogen bond groups on side chains and end groups by utilizing the random copolymerization reaction of the low polymer diglycol, the chain extender and the first diisocyanate. Compared with the traditional self-healing material, the self-healing material disclosed by the invention can realize repeated self-healing at the same position at a low temperature without adding a repair agent to the damaged part, and the self-healing polymer material is high in healing ability, excellent in mechanical property, excellent in material film-forming property and transparency, simple in process and low in cost.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a self-healing polymer material and a preparation method thereof. Background technique [0002] Inspired by the self-healing of organisms after damage, scientists proposed the concept of self-healing polymers. It refers to the ability to sense external environmental changes during use, continuously and automatically adjust its internal structure, through self-growth or In situ compounding and other regenerative mechanisms realize self-healing, repairing, and repairing of new polymer materials that are partially damaged. [0003] The construction forms of self-healing materials are divided into microcapsule type and intrinsic type. The research on the microcapsule system is earlier and more extensive, but there are still many problems in the microcapsule system: such as the poor compatibility between the microcapsule and the matrix, the low loading of the repair agent in the mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32
Inventor 李国良宋妍齐涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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