Self-repairing material based on bipyridine metal coordination and preparation method thereof

A self-healing material and metal coordination technology, which is applied in the field of self-healing materials based on bipyridine metal coordination and its preparation, can solve the problems of material water content requirements, unsuitable promotion, long cycle, etc., and achieve less synthesis steps and preservation The effect of long time and mild conditions

Inactive Publication Date: 2021-04-30
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Of course, the current preparation of such materials is often based on various mechanisms, such as the introduction of polyethylene glycol, etc., to form hydrogels, but these are too complicated, the cycle is long, and there is also a requirement for the water content of the material, which is not suitable for the promotion of applications.

Method used

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  • Self-repairing material based on bipyridine metal coordination and preparation method thereof
  • Self-repairing material based on bipyridine metal coordination and preparation method thereof
  • Self-repairing material based on bipyridine metal coordination and preparation method thereof

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Embodiment 1

[0040] Embodiment 1: A self-repairing material based on bipyridine metal coordination, the chemical structural formula of the bipyridine-based metal coordination self-repairing material is as follows:

[0041]

Embodiment 2

[0042] Example 2: A preparation method of bipyridine-based metal coordination self-healing material

[0043] The synthetic route of the preparation method is as follows:

[0044]

[0045]

[0046] Described preparation method comprises:

[0047] Step 1: Dissolve 5.6mmol 2,2'-bipyridine-4,4'-dicarboxylate methyl ester in 20mL tetrahydrofuran and 5mL water system, then add 0.1g potassium hydroxide, and reflux for 12h. The obtained solution is concentrated and dissolved In water, add hydrochloric acid solution dropwise to precipitate, and obtain 2,2'-bipyridine-4,4'-dicarboxy (A1), the characterization of compound A1:

[0048] 1 H NMR (400MHz, DMSO) δ8.94(dd, J=10.9, 4.9Hz, 1H), 8.85(s, 1H), 7.98–7.90(m, 1H).

[0049]

[0050] Step 2: Mix 50 mgA1 with 8 mL of thionyl chloride in N 2 The reaction was refluxed at ambient temperature at 80°C for 8h. After the concentrated liquid was reacted, 3mL of dichloromethane, 0.22mL of triethylamine and 1g of PDMS were added at 0°...

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Abstract

The invention provides a self-repairing material based on bipyridine metal coordination and a preparation method thereof. The self-repairing material adopts 2,2' -bipyridine methyl- 4,4' -dicarboxylate as a raw material, and the self-repairing material is obtained through hydrolysis reaction, polymerization reaction and coordination. According to the preparation method of the self-repairing material based on bipyridine metal coordination, the coordination effect of metal ions is utilized, it is guaranteed that after the material is broken, reconnection can be conducted under the condition that the proper temperature and humidity are met, and self-repairing at the high temperature can be achieved.

Description

technical field [0001] The invention belongs to the field of self-repairing materials, and in particular relates to a self-repairing material based on bipyridine metal coordination and a preparation method thereof. Background technique [0002] Inspired by the self-healing phenomenon of living organisms, self-healing materials have emerged. Among them, after the polymer material is damaged by mechanical force, the macromolecular chain generally undergoes homogeneous or heterogeneous cracking, which makes the material produce micro-cracks that are difficult to detect. With the accumulation of time, larger cracks are generated, and the material will quickly fail. Therefore, Rapid repair of microcracks is very important for many polymer materials used in important fields. In the past ten years, various research papers on self-healing polymers have sprung up, and their applications in sensors and electronic skin have attracted widespread attention. [0003] Self-healing materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/398C08G77/388
CPCC08G77/398C08G77/388
Inventor 马云张英杰佘鹏飞赵强刘淑娟
Owner NANJING UNIV OF POSTS & TELECOMM
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