Self-adaptive intelligent material based on coordinate bond as well as preparation method and application of self-adaptive intelligent material

A smart material and self-adaptive technology, applied in the direction of nickel organic compounds, copper organic compounds, cobalt organic compounds, etc., can solve the problems of high bond energy and adverse effects of polymer materials on aging resistance, and achieve high mechanical stiffness and excellent reliability. The effect of high recovery and high yield

Active Publication Date: 2021-12-03
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned materials all use exchangeable covalent chemical bonds, which have higher bond energy than non-covalent exchangeable chemical bonds, which still brings some problems to the application of materials. For example, polymer materials prepared by using exchangeable covalent chemical bonds are often Higher temperatures are required for reprocessing and recycling, and higher processing temperatures can adversely affect the aging resistance of polymeric materials

Method used

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  • Self-adaptive intelligent material based on coordinate bond as well as preparation method and application of self-adaptive intelligent material
  • Self-adaptive intelligent material based on coordinate bond as well as preparation method and application of self-adaptive intelligent material
  • Self-adaptive intelligent material based on coordinate bond as well as preparation method and application of self-adaptive intelligent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of multidentate flexible ligands: Add 50.00g of pentaerythritol tetra-3-mercaptopropionate into a flask, then add 100mL of tetrahydrofuran as a solvent, control the reaction temperature at room temperature, stir at a speed of 100r / min, and stir for 30min until completely dissolved; Add 44.20g of N-allylimidazole and 1.05g of benzoin dimethyl ether to the above solution as a photoinitiator, use 365nm wavelength of ultraviolet radiation, control the reaction temperature at room temperature under sealed conditions, stir at a speed of 200r / min, and react for 60min to obtain A solution containing a multidentate flexible ligand;

[0049] Preparation of metal salt solution: Take 17.45g of copper chloride, add 50mL of methanol as a solvent, and mix evenly by ultrasonic, ultrasonic power 120W, ultrasonic time 30min, ultrasonic temperature room temperature;

[0050] Add the metal salt solution into the above-mentioned solution containing multidentate flexible ligands ...

Embodiment 2

[0054] Preparation of multidentate flexible ligands: Add 50.00g of pentaerythritol tetra-3-mercaptopropionate into a flask, then add 100mL of tetrahydrofuran as a solvent, control the reaction temperature at room temperature, stir at a speed of 100r / min, and stir for 30min until completely dissolved; 29.05g of acrylamide and 1.05g of benzoin dimethyl ether (DMPA) were added to the above solution as photoinitiators, and ultraviolet radiation with a wavelength of 365nm was used to control the reaction temperature at room temperature under sealed conditions, the stirring speed was 200r / min, and the reaction was carried out for 180min to obtain A solution of a multidentate flexible ligand;

[0055] Preparation of metal salt solution: take 13.26g of nickel chloride, add 50mL of methanol as a solvent, mix well by ultrasonic, ultrasonic power 120W, ultrasonic time 2h, ultrasonic temperature room temperature;

[0056] Add the metal salt solution into the solution containing multi-dent...

Embodiment 3

[0059] Preparation of multidentate flexible ligands: Add 50.00g of pentaerythritol tetra-3-mercaptopropionate into a flask, then add 100mL of tetrahydrofuran as a solvent, control the reaction temperature at room temperature, stir at a stirring speed of 200r / min, and stir for 10min until completely dissolved; Add 29.47g of acrylic acid and 0.98g of benzoin ethyl ether to the above solution as a photoinitiator, adopt ultraviolet radiation with a wavelength of 365nm, control the reaction temperature at room temperature under sealed conditions, stir at a speed of 100r / min, and react for 180min to obtain a polydentate flexible ligand. solution;

[0060] Preparation of metal salt solution: take 27.89g of zinc chloride, add 50mL of methanol as a solvent, mix well by ultrasonic, ultrasonic power 30W, ultrasonic time 120min, ultrasonic temperature room temperature;

[0061] Add the metal salt solution into the solution containing the multi-dentate flexible ligand by dropwise addition,...

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Abstract

The invention discloses a self-adaptive intelligent material based on a coordination bond, which has a self-adaptive network structure formed by coordination of a multi-tooth flexible ligand and a metal center, and the multi-tooth flexible ligand and the metal center form the coordination bond through amino, carboxyl, pyridyl or imidazolyl. The self-adaptive intelligent material has a three-dimensional structure and contains a large number of coordinate bonds, the rigidity and excellent mechanical strength of the material can be ensured, and in addition, the material is endowed with good processability and recoverability due to the exchangeability of the coordinate bonds. The coordination bond-based self-adaptive intelligent material can be applied to the fields of sealants, adhesives, rapid self-repairing coatings, temperature-sensitive variable-stiffness self-repairing engineering materials, additive manufacturing and the like.

Description

technical field [0001] The invention belongs to the field of novel materials, and in particular relates to a self-adaptive intelligent material based on coordination bonds, a preparation method and application thereof. Background technique [0002] Polymer materials traditionally fall into two categories, thermosets and thermoplastics. Among them, thermosetting polymers are characterized by an irreversible cross-linked polymer network structure, so they have excellent mechanical strength and solvent resistance. However, due to the irreversibility of cross-linking, thermosetting polymers cannot be reprocessed or recycled after curing; on the contrary, Thermoplastic polymers are formed by non-covalent interactions of high-molecular-weight polymer segments, and are easily reshaped, reprocessed, and recycled by heating, but their durability, creep resistance, etc. are weak. Therefore, designing and synthesizing polymer materials with both thermosetting rigidity and thermoplasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C07F1/08C07F3/06C07F15/04C07F15/06
CPCC08G83/008C07F1/08C07F3/06C07F15/04C07F15/06
Inventor 李承辉王洪芹陶涵清高文通
Owner NANJING UNIV
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