Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction and preparation method thereof

A technology of polydimethylsiloxane and self-healing material, applied in the field of polydimethylsiloxane self-healing material and its preparation, can solve the problems of low mechanical strength and the like, and improve breaking strength and elongation at break , The method is simple and feasible, and the effect of increasing the mechanical strength

Active Publication Date: 2021-08-10
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the defect of low mechanical strength of the material, isocyanate is added to react with amino group to form urea group

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
  • A kind of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction and preparation method thereof
  • A kind of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction and preparation method thereof
  • A kind of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of preparation method of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction of the present invention, its preparation process step is:

[0054] a. Dissolve 5g of 4,4-diaminodiphenyl disulfide in 50mL CH 2 Cl 2 Add 8.15g of triethylamine and stir to dissolve it, pour the dissolved liquid into a clean three-necked flask, and pass through dry N 2 .

[0055] b. Under ice bath conditions, take 3.90g triphosgene and dissolve in 20mL CH 2 Cl 2 Slowly add it dropwise to the above liquid with a constant pressure funnel.

[0056] c. React for 5 minutes under ice-bath conditions, wash the reacted product twice with ice water, remove the liquid in the lower layer, and dry in vacuo to obtain a light yellow powder.

[0057] d. Take a clean three-necked flask, add 20g of amino-terminated polydimethylsiloxane (PDMS) with a molecular weight of 2000, dissolve it in 100mL of THF, and stir evenly.

[0058] e. Feed nitrogen into the three-necke...

Embodiment 2

[0063] A kind of preparation method of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction of the present invention, its preparation process step is:

[0064] a. Dissolve 5g of 4,4-diaminodiphenyl disulfide in 50mL CH 2 Cl 2 Add 8.15g of triethylamine and stir to dissolve it, pour the dissolved liquid into a clean three-necked flask, and pass through dry N 2 .

[0065] b. Under the condition of ice bath, take 3.98g triphosgene and dissolve it in 20mL CH 2 Cl 2 Slowly add it dropwise to the above liquid with a constant pressure funnel.

[0066] c. React for 10 min under ice-bath conditions, wash the reacted product twice with ice water, remove the liquid in the lower layer, and vacuum-dry to obtain a light yellow powder.

[0067] d. Take a clean three-necked flask, add 10 g of amino-terminated polydimethylsiloxane (PDMS) with a molecular weight of 1000, dissolve it in 100 mL of THF, and stir evenly.

[0068] e. Feed nitrogen gas into the t...

Embodiment 3

[0073] A kind of preparation method of polydimethylsiloxane self-healing material based on disulfide bond exchange reaction of the present invention, its preparation process step is:

[0074] a. Dissolve 5g of 4,4-diaminodiphenyl disulfide in 50mL CH 2 Cl 2 Add 8.15g of triethylamine and stir to dissolve it, pour the dissolved liquid into a clean three-necked flask, and pass through dry N 2 .

[0075] b. Under the condition of ice bath, take 6.02g triphosgene and dissolve it in 20mL CH 2 Cl 2 Slowly add it dropwise to the above liquid with a constant pressure funnel.

[0076] c. React for 8 minutes under ice bath conditions, wash the reacted product twice with ice water, remove the liquid in the lower layer, and dry in vacuo to obtain a light yellow powder.

[0077] d. Take a clean three-necked flask, add 50g of amino-terminated polydimethylsiloxane (PDMS) with a molecular weight of 5000, dissolve it in 100mL of THF, and stir evenly.

[0078] e. Introduce nitrogen into t...

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 provides a polydimethylsiloxane self-repair material based on disulfide bond exchange reaction and a preparation method thereof, belonging to the technical field of new self-repair materials and preparation. It is of great significance that the present invention utilizes reversible exchanged chemical bonds to realize the repair of material damage, and it has the ability to repair damages indefinitely in theory. In this method, the disulfide bond is used as the self-healing bond of the material, and then the PDMS is cross-linked by diisocyanate, and a self-healing PDMS elastomer is finally obtained. The addition of diisocyanate produces urea groups, which form intermolecular hydrogen bonds and increase the crosslinking density of the material. In addition, the method provided by the invention is simple and feasible, and under the joint action of hydrogen bonds and disulfide bonds, the material obtains excellent mechanical properties and self-repairing properties. Self-healing functional materials are important new materials, which are expected to solve technical problems that cannot be solved by traditional methods, and have great development prospects and application value in some important engineering and cutting-edge technology fields.

Description

technical field [0001] The invention relates to the technical field of self-healing elastomers and their preparation, in particular to a polydimethylsiloxane self-healing material based on a disulfide bond exchange reaction and a preparation method thereof. Background technique [0002] With the development of science and technology, polymer materials play an increasingly important role in people's daily life, especially in the fields of material surface protection, flexible electronic devices, and biomaterials. Since traditional polymer materials are mainly formed by irreversible covalent bond cross-linking, once the material is damaged by external mechanical action, it is difficult to recover, thus reducing the service life of the material. In recent years, the development of self-healing materials provides an ideal way to solve this problem. [0003] According to the principle of material self-healing, self-healing materials are divided into two types: foreign aid self-h...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/61C08G18/32
CPCC08G18/3855C08G18/61
Inventor 孙智勇陈光孟蔺存国郑纪勇张金伟王利
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com