Self-repairing PDMS coating and preparation method thereof

A self-healing and coating technology, used in alginic acid coatings, coatings, etc., can solve problems such as reducing the mechanical properties of substrates or coatings

Active Publication Date: 2021-04-02
JILIN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the current microcapsule self-healing method adds microcapsules to the coating or polymer matrix, the mechanical properties of the matrix or coating will be reduced, so the present invention proposes a method for preparing a self-healing PDMS coating to solve this problem

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
  • Self-repairing PDMS coating and preparation method thereof
  • Self-repairing PDMS coating and preparation method thereof
  • Self-repairing PDMS coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Place 1 mg of PDMS in an oxygen environment, and use ultraviolet rays with a wavelength of 320 nanometers to irradiate the oxygen to make the oxygen generate oxygen-rich groups. After 50 minutes, put it into a 30% ethanol solution and take it out for 30 minutes; the surface of PDMS is grafted with hydroxyl ;

[0036] (2) Add PDMS with hydroxyl groups to 0.1M potassium permanganate solution and soak for 10 hours, so that hydroxyl groups are oxidized into carboxyl groups;

[0037] (3) Add 1mg of aminopolyethylene glycol hydroxyl groups to PDMS with carboxyl groups, and the carboxyl groups grafted on the surface of PDMS react to form amino groups.

[0038] (4) Mix 1mg of calcium alginate-based microcapsules and 0.4mg of EDC in 200mL of water at room temperature (20-30°C). After 2 hours, EDC reacts with the carboxyl groups of calcium alginate-based microcapsules to form amine-reactive O-acylisourea intermediate;

[0039] (5) Disperse the above O-acylisourea intermedia...

Embodiment 2

[0041] (1) Put 1 mg of PDMS in an oxygen environment, irradiate the oxygen with ultraviolet rays with a wavelength of 350 nanometers to generate oxygen-rich groups in the oxygen, and after 60 minutes, put it into a 30% ethanol solution for 30 minutes and take it out; the surface of PDMS is grafted with hydroxyl ;

[0042] (2) Add PDMS with hydroxyl groups to 0.1M potassium permanganate solution and soak for 12 hours, so that the hydroxyl groups are oxidized into carboxyl groups;

[0043] (3) Add 1mg of aminopolyethylene glycol hydroxyl groups to PDMS with carboxyl groups, and the carboxyl groups grafted on the surface of PDMS react to form amino groups.

[0044] (4) Mix 1mg of calcium alginate-based microcapsules and 0.4mg of EDC in 200mL of water at room temperature (20-30°C). After 3 hours, EDC reacts with the carboxyl groups of calcium alginate-based microcapsules to form amine-reactive Aqueous solution of O-acylisourea intermediate;

[0045] (5) Disperse the above O-acyl...

Embodiment 3

[0047] (1) Put 1 mg of PDMS in an oxygen environment, irradiate the oxygen with ultraviolet rays with a wavelength of 380 nanometers to generate oxygen-rich groups in the oxygen, and after 90 minutes, put it into a 30% ethanol solution and take it out for 30 minutes; the surface of PDMS is grafted with hydroxyl ;

[0048] (2) Add PDMS with hydroxyl groups to 0.1M potassium permanganate solution and soak for 15 hours, so that hydroxyl groups are oxidized into carboxyl groups;

[0049] (3) Add 1 mg aminopolyethylene glycol hydroxyl group to the PDMS solution with carboxyl groups, and the carboxyl groups grafted on the surface of PDMS react to form amino groups.

[0050] (4) Mix 1mg of calcium alginate-based microcapsules and 0.4mg of EDC in 200mL of water at room temperature (20-30°C). After 3 hours, EDC reacts with the carboxyl groups of calcium alginate-based microcapsules to form amine-reactive Aqueous solution of O-acylisourea intermediate;

[0051] (5) Disperse the above ...

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

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a self-repairing PDMS coating and a preparation method thereof, belongs to the technical field of high polymer materials, and aims to solve the problem that the mechanical property of a coating or a polymer matrix is reduced after microcapsules are added into the coating or the polymer matrix by a microcapsule self-repairing method. According to the preparation method, epoxy resin with surface modified with amino is generated through a series of reaction on PDMS, then the epoxy resin is mixed with calcium alginate-based microcapsules and an O-acyl isourea intermediate generated after EDC reaction, and reacting is conducted to obtain a self-repairing PDMS coating. The calcium alginate-based microcapsules is uniformly dispersed in the epoxy resin by forming amido bonds, and the mechanical properties of the material is increased, so that the prepared self-repairing PDMS can realize self-repairing of damaged parts, the aging and failure problems under the action ofexternal force, environment and the like are relieved, use safety and reliability are improved, and material service life is prolonged.

Description

technical field [0001] The invention relates to the field of polymer compound preparation, in particular to a preparation method of self-repairing PDMS. Background technique [0002] PDMS is a kind of silicone, because of its low cost, simple use, good adhesion with silicon wafers, and good chemical inertness, it has become a polymer widely used in microfluidics and other fields. material. [0003] During the use of polymer materials including PDMS, aging and failure problems are serious due to external force, environment, etc., especially cracks will inevitably occur on the surface and inside of the material, which will reduce the performance of the material and shorten the life of the material. If the micro-cracks of the polymer material can be automatically repaired, it is bound to prolong the service life of the material and improve the safety and reliability of use. [0004] Inspired by biological self-healing properties, scientists have introduced the concept of self...

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): C09D183/08C09D105/04C09D191/00C09D7/65C08G77/388C08B37/04
CPCC08B37/0084C08G77/388C08L2205/03C08L2205/18C09D183/08C09D7/65C09D7/70C08L5/04C08L91/005
Inventor 孙霁宇王悦明李雯田丽梅赵杰
Owner JILIN 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