Variable-stiffness self-repairing material containing metal-sulfydryl coordinate bond as well as preparation and application thereof

A technology of self-healing materials and variable stiffness, applied in the direction of additive processing, adhesives, etc., can solve the problems of limited practical application fields, water vapor sensitivity, cumbersome synthesis steps, etc., and achieve good self-healing performance, simple steps, and excellent flexibility. Effect

Active Publication Date: 2021-12-21
NANJING UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, self-healing materials based on coordination bonds have the following disadvantages: (1) The synthesis steps are relatively cumbersome, requiring multi-step synthesis to introduce ligand-hole units into the long chain of the polymer, and then add metal ions to complete the coordination form a cross-linked network
(2)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Variable-stiffness self-repairing material containing metal-sulfydryl coordinate bond as well as preparation and application thereof
  • Variable-stiffness self-repairing material containing metal-sulfydryl coordinate bond as well as preparation and application thereof
  • Variable-stiffness self-repairing material containing metal-sulfydryl coordinate bond as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0068] Example 1

[0069] A variable stiffness self-healing material containing a metal-mercapto coordination bond and a preparation method thereof:

[0070] 50.00g of pentaerythritol tetra-3-mercaptopropionate was added to the flask, then 100mL of dichloromethane was added as a solvent, the reaction temperature was controlled to 25°C, the stirring speed was 100r / min, and the reaction was carried out for 30min to obtain a compound solution with a terminal mercapto group;

[0071] 8.28g of triethylamine was added to the above-mentioned mercapto-terminated compound solution, and the reaction temperature was controlled at 25°C and the stirring speed was 200r / min under sealed conditions, and the reaction was carried out for 4h;

[0072] Add 0.30g of pentaerythritol triacrylate to the above mixing system, control the reaction temperature under sealed conditions at 25°C, stir at 200r / min, and react for 6h;

[0073] Preparation of metal zinc salt solution: take 13.79g of zinc chlori...

Example Embodiment

[0077] Example 2

[0078] A variable stiffness self-healing material containing a metal-mercapto coordination bond and a preparation method thereof:

[0079] 80.00g of trimethylolpropane tris(2-mercaptoacetate) and 19.83g of mercapto-terminated liquid polysulfide resin with a relative molecular mass of 1000 were added to the flask, and then 100mL of dichloromethane was added as a solvent, and the reaction temperature was controlled at 25°C, The stirring speed was 150r / min, and the reaction was carried out for 30min to obtain the compound solution of the terminal mercapto group;

[0080] 20.00 g of triethanolamine was added to the above-mentioned mercapto-terminated compound solution, and the reaction temperature was controlled to be 25° C. and the stirring speed was 250 r / min under sealed conditions, and the reaction was carried out for 4 hours;

[0081] 30.00g of pentaerythritol triacrylate was added to the above mixed system, and the reaction temperature was controlled to b...

Example Embodiment

[0087] Example 3

[0088] 20.00g of 2,7-naphthyldithiol and 4.16g of mercapto-terminated liquid polysulfide resin with a relative molecular mass of 4000 were added to the flask, and then 100mL of tetrahydrofuran was added as a solvent. , to obtain a compound solution with a thiol-terminated group;

[0089] 2.84g of N,N-dimethylbenzylamine was added to the above-mentioned mercapto-terminated compound solution, and the reaction temperature was controlled at 25°C and the stirring speed was 250r / min under sealed conditions, and the reaction was carried out for 4h;

[0090] To the above mixed system, 7.72 g of triphenylmethane triisocyanate was added, and the reaction temperature was controlled to be 25° C. under sealed conditions, and the stirring speed was 300 r / min, and the reaction was carried out for 6 hours;

[0091] Preparation of metal zinc salt solution: take 7.12g of zinc sulfate, add 10mL of methanol as a solvent, and carry out ultrasonic treatment for 1h at 25°C and ul...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a variable stiffness self-repairing material containing a metal-sulfydryl coordination bond. The variable stiffness self-repairing material is prepared from a sulfydryl-terminated small molecule compound, sulfydryl-terminated liquid polysulfide resin, a cross-linking agent, zinc salt, other metal salts, an alkaline regulator and a solvent. The structure of the material contains a large number of metal-sulfydryl coordination bonds, and the coordination bonds have good thermodynamic stability, so that the material has higher rigidity and mechanical strength; the good dynamic activity of the coordination bond ensures that the material has good self-repairing performance; due to the high temperature sensitivity of the coordination bond, the variable stiffness of the material in a wide temperature range is ensured; the coordination bond is insensitive to water, so that the environmental use stability of the material is ensured; meanwhile, the material has the characteristics of high transparency and adjustable refractive index. The variable stiffness self-repairing material containing the metal-sulfydryl coordinate bond can be applied to the fields of sealants, self-repairing coatings, temperature-sensitive variable stiffness self-repairing engineering materials, additive manufacturing, composite materials, optical transparent adhesives and the like.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a self-repairing material containing a coordination bond and a preparation method and application thereof, in particular to a variable stiffness self-repairing material containing a metal-mercapto coordination bond and a preparation method and application thereof. Background technique [0002] Self-healing materials are a new class of smart materials that can mimic organisms for self-healing when physically damaged by the environment or mechanical fatigue. This kind of material is of great significance for prolonging the service life of materials and improving the stability of materials, and has gradually become one of the research hotspots. It has shown great development prospects and application value in industries such as aerospace, shipbuilding, construction, and automobiles. . [0003] Self-healing materials can be divided into two categories: external aid type and intrinsic type...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08G83/00C08L87/00B33Y70/00C09J187/00
CPCC08G83/008C08L87/00B33Y70/00C09J187/00
Inventor 李承辉李文王洪芹高文通
Owner NANJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap