CN111393651A - Self-repairing polysiloxane elastomer and preparation method and application thereof - Google Patents
Self-repairing polysiloxane elastomer and preparation method and application thereof Download PDFInfo
- Publication number
- CN111393651A CN111393651A CN202010245873.4A CN202010245873A CN111393651A CN 111393651 A CN111393651 A CN 111393651A CN 202010245873 A CN202010245873 A CN 202010245873A CN 111393651 A CN111393651 A CN 111393651A
- Authority
- CN
- China
- Prior art keywords
- self
- repairing
- elastomer
- parts
- polysiloxane elastomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention belongs to the field of organic elastomers, and discloses a self-repairing polysiloxane elastomer, and a preparation method and application thereof. The preparation method of the self-repairing polysiloxane elastomer comprises the following steps: dissolving hydroxyethyl-terminated polydimethylsiloxane, N' N-di-tert-butyl ethylenediamine, diisocyanate and a crosslinking agent in an organic solvent, adding a catalyst, and heating and curing in a mold to obtain the self-repairing polysiloxane elastomer. By means of the larger steric effect of the tertiary butyl, the generated dynamic urea bond is easier to trigger at lower temperature and realize higher exchange efficiency, so that the elastomer has the characteristic of realizing self-repairing at lower temperature in shorter time. In addition, the polysiloxane elasticity of the invention enables the surface of the polysiloxane to be easier to permeate into the nano filler because of containing dynamic covalent bonds, and is expected to be applied to the field of stretchable electronics.
Description
Technical Field
The invention relates to the field of organic elastomers, in particular to a self-repairing polysiloxane elastomer, and a preparation method and application thereof.
Background
Polysiloxanes are a class of typical semi-inorganic polymers with repeating silicon-oxygen bonds as the backbone, with organic groups directly attached to the silicon atoms, and molecular weights can vary from hundreds to hundreds of thousands. Because of the chemical structure, the polymer has the advantages of organic and inorganic polymers, such as excellent weather resistance, high and low temperature resistance, transparency, electric insulation performance, ozone aging resistance and the like. Therefore, polysiloxanes are widely used in the fields of electronic and electric appliances, daily sealing, medical care and health, and the like. In particular, crosslinked polysiloxanes, because of their good tensile, resilient and mechanical properties, are commonly used in the elastomeric matrix of various products. However, silicone elastomers also suffer from the following problems: (1) when the device is damaged or destroyed in the using process, self-repairing can not be realized so as to reduce the loss and facilitate the use; (2) similar to most conventional thermoset elastomers, cured polysiloxanes are not melt-insoluble, cannot be reused, and do not meet the requirements of environmental protection and economy.
Therefore, there have been some reports on how to prepare polysiloxanes having self-healing and recycling properties. For example, patent CN106336669A to hong Ping et al discloses a silicone adhesive polymer which is self-repaired and recycled by using sunlight. However, compared with most self-repairing polysiloxane products utilizing reversible bonds, the self-repairing time is longer (more than 24 hours), and the mechanical property is poor (1.34 MPa). Summer heson et al disclose in CN108003317A a self-healing, reworkable polysiloxane based on urea linkages formed by the reaction of an amino-terminated polysiloxane with an isocyanate. However, the self-healing temperature is still high (90 ℃) and the time is still long (6 hours at 90 ℃ and then 12 hours at 60 ℃).
In order to further reduce the self-repairing temperature and time and enable the self-repairing to be applied to actual production, the invention provides a preparation method and application of a self-repairing polysiloxane elastomer containing a low-temperature trigger type dynamic urea bond.
Disclosure of Invention
Aiming at the common problems of high self-repairing temperature and long repairing time of self-repairing polysiloxane containing reversible chemical bonds and dynamic covalent bonds in the prior art, the invention provides a self-repairing polysiloxane elastomer.
Another object of the present invention is to provide a method for preparing the self-repairing polysiloxane elastomer.
Still another object of the present invention is to provide the use of the self-healing silicone elastomer described above.
The invention utilizes the reaction of N' N-di-tert-butyl ethylenediamine and diisocyanate to generate the polysiloxane elastomer with dynamic urea bonds influenced by the site resistance. The polysiloxane elastomer has excellent mechanical property, and can realize self-repairing efficiency of more than 90% within 30 minutes at 60 ℃. And a heating spraying method is innovatively adopted to prepare the nano-material conductive layer which can be self-repaired, has excellent conductive performance and is not easy to damage, so that the application of the conductive coating on the flexible substrate is expected to be promoted.
In order to achieve the purpose, the invention adopts the following technical scheme:
the self-repairing polysiloxane elastomer is prepared from the following components in parts by mass:
polydimethylsiloxane 150 parts
15-100 parts of diisocyanate
5-50 parts of N' N-di-tert-butyl ethylenediamine
100 portions of organic solvent
1-5 parts of cross-linking agent
1-5 parts of catalyst
Preferably, the self-repairing polysiloxane elastomer is prepared from the following components in parts by mass:
polydimethylsiloxane 150 parts
15-100 parts of diisocyanate
8.6-34.4 parts of N' -N-di-tert-butylethylenediamine
100 portions of organic solvent
1-5 parts of cross-linking agent
1-5 parts of a catalyst.
Preferably, the polydimethylsiloxane is hydroxyethyl terminated polydimethylsiloxane with the molecular weight of 500-20000 or aminopropyl terminated polydimethylsiloxane with the molecular weight of 500-20000.
Preferably, the diisocyanate is one or more of hexamethylene diisocyanate, isophorone diisocyanate and toluene diisocyanate.
Preferably, the organic solvent is one or more of toluene, xylene, dichloromethane, chloroform and tetrahydrofuran.
Preferably, the cross-linking agent is one or two of triethanolamine and triethylamine.
Preferably, the catalyst is an organic tin catalyst, and more preferably one or more of dibutyltin dilaurate, stannous octoate and dibutyltin diacetate.
The preparation method of the self-repairing polysiloxane elastomer comprises the following steps:
according to the mass parts, 150 parts of hydroxyethyl-terminated polydimethylsiloxane, 4-50 parts of diamine-containing compound, 15-100 parts of diisocyanate and 1-5 parts of cross-linking agent are dissolved in 500 parts of organic solvent of 100 parts, then 1-5 parts of catalyst are added, and the self-repairing polysiloxane elastomer is obtained after heating and curing in a mold.
The self-repairing polysiloxane elastomer is applied to the technical field of stretchable electronic materials as a matrix.
The application of the substrate in the technical field of stretchable electronic materials comprises the following steps: heating the self-repairing polysiloxane elastomer to obtain a polysiloxane elastomer film, spraying the nano conductive material dispersion liquid on the polysiloxane elastomer film, and standing to obtain the flexible material with the self-repairing and stable conductive coating.
Preferably, the heating temperature is 50 to 100 ℃.
Preferably, the nano conductive material dispersion liquid is a multi-walled carbon nanotube isopropanol dispersion liquid or a silver nanowire ethanol dispersion liquid.
The mechanism of the invention is as follows:
n' N-di-tert-butyl ethylenediamine is combined with diisocyanate and then connected to a polysiloxane main chain, so that the low-temperature quick self-repairing polysiloxane elastomer with good mechanical property is obtained. Compared with other primary amines or secondary amines without larger steric hindrance groups, the generated dynamic urea bond is easier to trigger at lower temperature and realize higher exchange efficiency by virtue of larger steric hindrance effect of the tert-butyl group, so that the elastomer has the characteristic of realizing self-repairing at lower temperature and in shorter time.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) in the prior art, the self-repairing time, the temperature and the mechanical property of the self-repairing polysiloxane are difficult to be well balanced, for example, in patent CN106336669A, the self-repairing polysiloxane can be self-repaired under sunlight, but the self-repairing time is long (more than 24 hours), and the mechanical property is poor (1.34 Mpa). For example, in patent CN108003317A, the mechanical property is better (about 3 Mpa), but the self-repairing temperature is still higher (90 ℃), and the time is still longer (6 hours at 90 ℃, then 12 hours at 60 ℃). The polysiloxane elastomer containing low-temperature triggered dynamic urea bonds provided by the invention has better mechanical properties, and has the elongation at break of more than 650% and the maximum stress of more than 2.9 MPa. Moreover, when the polysiloxane elastomer is damaged, the polysiloxane elastomer can realize self-repairing at the temperature of 60 ℃, the repairing time is only 30 minutes, and the repairing efficiency can reach more than 90%.
(2) The polysiloxane elasticity of the invention enables the surface of the polysiloxane to be easier to permeate into the nano filler because of containing dynamic covalent bonds. The invention adopts a simple heating method to prepare the high-stability self-repairing flexible conductive coating. Is expected to be applied to the field of stretchable electronics.
(3) The polysiloxane elastomers described above are simple to synthesize.
Drawings
FIG. 1 is a stress-strain plot of an original elastomer sample and a repaired elastomer sample of example 1, wherein the original sample corresponds to the original elastomer sample and the repaired elastomer sample corresponds to the repaired elastomer sample.
FIG. 2 is a graph of stress strain curves for an elastomer virgin sample and an elastomer repaired sample of comparative example 1, wherein the virgin corresponds to the elastomer virgin sample and the modified corresponds to the elastomer repaired sample.
FIG. 3 is a graph of the results of a carbon nanotube conductive coating conductive self-repair test.
Fig. 4 is a graph of the change rate of the surface resistance of the silver nanowire conductive coating and a commercially available polysiloxane (dow corning Sylgard184) along with the change of the ultrasonic time, wherein the self-repairing polysiloxane corresponds to the silver nanowire conductive coating.
Detailed Description
The present invention will be further described with reference to the following specific examples and drawings, but the present invention is not limited to these examples. Unless otherwise specified, the following reagents, methods and apparatus are all reagents, methods and apparatus commonly used in the synthesis and processing arts.
Unless otherwise specified, all materials used in the present invention are commercially available reagent materials.
Example 1
3g of hydroxyethyl-terminated polydimethylsiloxane (molecular weight 200), 0.172g of N' -N-di-tert-butylethylenediamine, 1.3g of isophorone diisocyanate and 0.03g of triethanolamine were dissolved in 6g of toluene (ice bath), 0.03g of dibutyltin dilaurate was added, and the mixture was heated at room temperature for 12 hours and 60 ℃ for 12 hours in a mold and cured to obtain a self-repairing polysiloxane elastomer, which was referred to as elastomer 1. And testing the self-repairing performance of the alloy.
Mechanical self-repairing test: making the elastomer 1 into 2 standard dumbbell-shaped sample strips, measuring the mechanical properties of 1 of the sample strips (recorded as an elastomer original sample), then transversely cutting the other 1 standard dumbbell-shaped sample strip (recorded as an elastomer repair sample) by using a scalpel, placing the sample strips in an oven at 60 ℃ for 30 minutes, and taking out the sample strips until the sample strips are recovered to the room temperature. The mechanical properties of the alloy are tested by adopting a Kejia tensile machine, the test result is shown in figure 1, and the test result can be seen from figure 1: the elastomer original sample has the elongation at break of more than 650% and the maximum stress of 2.93MPa, and the maximum stress of the elastomer repaired sample after self-repairing is 2.7MPa and the self-repairing efficiency is 92.2% under the conditions of 60 ℃ and 30 minutes (2.7Mpa/2.9Mpa ═ 92.2%).
Comparative example 1
3g of hydroxyethyl-terminated polydimethylsiloxane (molecular weight 200), 1.3g of isophorone diisocyanate, and 0.03g of triethanolamine were dissolved in 6g of toluene (ice bath), 0.03g of dibutyltin dilaurate was added, and the mixture was heated at room temperature for 12 hours and 60 ℃ for 12 hours in a mold to be cured to obtain a self-repairing polysiloxane elastomer, which was referred to as elastomer 1'. And testing the self-repairing performance of the alloy.
Mechanical self-repairing test: making the elastomer 1' into 2 standard dumbbell-shaped sample strips, measuring the mechanical properties of 1 of the sample strips (recorded as an original sample of the elastomer), then transversely cutting the other 1 standard dumbbell-shaped sample strips (recorded as a repaired sample of the elastomer) by using a scalpel, placing the sample strips in an oven at 60 ℃ for 30 minutes, and taking out the sample strips until the sample strips are recovered to the room temperature. The mechanical properties of the alloy are tested by adopting a Kejia tensile machine, the test result is shown in figure 2, and the test result can be seen from figure 2: the mechanical property of the elastomer is close to that of the elastomer in example 1, and the self-repairing efficiency of the elastomer repairing sample is only 40% under the modification condition of 30 minutes at 60 ℃, which shows that the addition of N' N-di-tert-butyl ethylenediamine brings better self-repairing performance.
Comparative example 2
3g of hydroxyethyl-terminated polydimethylsiloxane (molecular weight: 200), 1.3g of isophorone diisocyanate, 0.11g of N 'N-diethylethylenediamine (the same amount as that of the N' N-di-t-butylethylenediamine substance in example 1) and 0.03g of triethanolamine were dissolved in 6g of toluene (ice bath), 0.03g of dibutyltin dilaurate was added, and the resulting mixture was heated at room temperature for 12 hours and 60 ℃ for 12 hours in a mold and cured to obtain a self-repairing silicone elastomer, referred to as elastomer 1 ". And testing the self-repairing performance of the alloy.
Mechanical self-repairing test: making the elastomer 1' into 2 standard dumbbell-shaped sample strips, measuring the mechanical properties of 1 of the sample strips (recorded as an original sample of the elastomer), then transversely cutting the other 1 standard dumbbell-shaped sample strips (recorded as a repaired sample of the elastomer) by using a scalpel, placing the sample strips in an oven at 60 ℃ for 30 minutes, and taking out the sample strips until the sample strips are recovered to the room temperature. The mechanical properties of the material were tested by means of a Kejian tensile machine. The maximum stress of the obtained elastomer original sample and the maximum stress of the obtained elastomer restored sample are respectively 2.8Mpa and 1.3Mpa, and the self-repairing efficiency is only 36 percent. This shows that the addition of N' N-di-tert-butylethylenediamine brings more remarkable self-repairing performance compared with other non-tert-butylethylenediamine.
Example 2
3g hydroxyethyl end-capped polydimethylsiloxane (molecular weight 20000), 0.688g N' N-di-tert-butylethylenediamine, 2g toluene diisocyanate and 0.1g triethanolamine are dissolved in 4g dichloromethane (ice bath), 0.1g stannous octoate is added, and the mixture is heated in a mold for 12 hours at room temperature and 60 ℃ for 12 hours to be cured to obtain the self-repairing polysiloxane elastomer. Referred to as elastomer 2. And testing the self-repairing performance of the alloy.
Mechanical self-repairing test: making the elastomer 2 into 2 standard dumbbell-shaped sample strips, measuring the mechanical properties of 1 of the sample strips (recorded as an original sample of the elastomer), then transversely cutting the other 1 standard dumbbell-shaped sample strip (recorded as a repaired sample of the elastomer) by using a scalpel, placing the sample strip in an oven at 60 ℃ for 30 minutes, and taking out the sample strip until the sample strip is recovered to the room temperature. The mechanical property of the material is tested by adopting a Kejia tensile machine, and the test result shows that: the original sample of the elastomer has the elongation at break of more than 290% and the maximum stress of 3.4MPa, and the maximum stress of the repaired sample of the elastomer is 2.8MPa after self-repairing at 60 ℃ for 30 minutes, and the self-repairing efficiency is 82%.
Example 3
3g of aminopropyl-terminated polydimethylsiloxane (molecular weight 5500), 0.344g N' N-di-tert-butylethylenediamine, 0.3g of hexamethylene diisocyanate, and 0.02g of triethylamine were dissolved in 10g of xylene (ice bath), and 0.02g of dibutyltin diacetate was added thereto, followed by heating at room temperature for 12 hours and 60 ℃ for 12 hours in a mold to cure the mixture, thereby obtaining a self-repairing polysiloxane elastomer, which was referred to as elastomer 3. And testing the self-repairing performance of the alloy.
Mechanical self-repairing test: making the elastomer 3 into 2 standard dumbbell-shaped sample strips, measuring the mechanical properties of 1 of the sample strips (recorded as an original sample of the elastomer), then transversely cutting the other 1 standard dumbbell-shaped sample strips (recorded as a repaired sample of the elastomer) by using a scalpel, placing the sample strips in an oven at 60 ℃ for 30 minutes, and taking out the sample strips until the sample strips are recovered to the room temperature. The mechanical property of the material is tested by adopting a Kejia tensile machine, and the test result shows that: the original sample of the elastomer has the elongation at break of over 240 percent and the maximum stress of 3.7MPa, and the maximum stress of the repaired sample of the elastomer is 3.1MPa after self-repairing at 60 ℃ for 30 minutes, and the self-repairing efficiency is 84 percent.
Application experiment of self-repairing polysiloxane elastomer:
1. preparing a carbon nano tube conductive coating:
the self-repairing polysiloxane elastomer film described in example 1 was placed on a flat heating table at 100 ℃ and heated, the surface temperature of the sample was 60 ℃, then 20m L carbon nanotube dispersion was sprayed onto the polysiloxane elastomer film (size 5 × 5 cm), and the nozzle was perpendicular to and 15 cm above the surface of the film, and after standing, a self-repairing and stable carbon nanotube conductive coating was obtained, wherein the nano conductive material dispersion was an isopropanol dispersion of multi-walled carbon nanotubes (obtained from seaman technologies ltd, shenzhen), and the concentration of the multi-walled carbon nanotubes in isopropanol was 1mg/m L.
And (3) conducting self-repairing test of the carbon nano tube conducting coating: the carbon nanotube conductive coating was cut off the surface conductive layer with a scalpel, and then irradiated under an infrared lamp and removed at an appropriate time to test its self-repairing performance, and the result is shown in fig. 3. From fig. 3, it can be seen that: the resistance (1.64 megaohms) of the carbon nanotube conductive sample based on the elastomer can be quickly recovered from 3.1 megaohms to 2 megaohms in about 100 seconds, and the self-repairing speed is high.
2. Preparing a silver nanowire conductive coating:
the self-repairing polysiloxane elastomer film described in example 1 was placed on a flat heating table and heated at 100 ℃ with a sample surface temperature of 60 ℃, 10m L of silver nanowire dispersion was sprayed onto a piece of the self-repairing polysiloxane elastomer film (size 5 × 5 cm) with a nozzle perpendicular to and 15 cm above the film surface, and after standing, a composite material with a stable silver nanowire conductive coating was prepared, wherein the nano conductive material dispersion was silver nanowires (preparation method is described in Wei Y, Chen S, L i F, et al. high hly stable and sensitive paper-based binding sensor using silver nanowires/layered double hydroxides hybrid [ J ]. applied materials & interfaces,2015,7(26): 82 + 14191.) of ethanol dispersion of silver nanowires in ethanol with a concentration of 2mg/m L.
Preparation of dow corning Sylgard184 silicone rubber coating:
the preparation method of the Sylgard184 film sample comprises the steps of mixing a main material and a curing agent according to a mass fraction of 10:1, pouring the mixture into a mold, placing the mold in an oven at 60 ℃ for curing for 12 hours, taking out the sample, heating the sample on a flat heating table at 100 ℃, wherein the surface temperature of the sample is 60 ℃, spraying 10m L silver nanowire dispersion liquid onto a Sylgard184 silicon rubber film (with the size of 5 x 5 cm), and standing the silicon rubber film to obtain the silicon rubber composite material with the silver nanowire conductive coating, wherein the silver nanowire dispersion liquid is silver nanowire (the preparation method is the same as that of the silver nanowire ethanol dispersion liquid) and the concentration of the silver nanowire in the ethanol is 2mg/m L.
Testing the stability of the silver nanowire conductive coating: the silver nanowire conductive coating and a commercially available corning Sylgard184 silicone rubber coating were sonicated in an aqueous phase and tested for resistance change, with the results shown in figure 4. From fig. 4, it can be derived that: when the polysiloxane elastomer is used as a spraying substrate, the resistance of the silver nanowire conductive coating is basically kept unchanged during ultrasonic treatment, and when the Sylgard184 silicon rubber is used as a substrate, the conductivity of the coating is sharply reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The self-repairing polysiloxane elastomer is characterized by being prepared from the following components in parts by mass:
150 parts of polydimethylsiloxane;
15-100 parts of diisocyanate;
5-50 parts of N' N-di-tert-butyl ethylenediamine;
100 portions of organic solvent and 500 portions of organic solvent;
1-5 parts of a cross-linking agent;
1-5 parts of a catalyst.
2. The self-repairing polysiloxane elastomer as claimed in claim 1, which is prepared from the following components in parts by mass:
150 parts of polydimethylsiloxane;
15-100 parts of diisocyanate;
8.6-34.4 parts of N' -N-di-tert-butylethylenediamine;
100 portions of organic solvent and 500 portions of organic solvent;
1-5 parts of a cross-linking agent;
1-5 parts of a catalyst.
3. The self-healing polysiloxane elastomer of claim 1 or 2, wherein the polydimethylsiloxane is hydroxyethyl-terminated polydimethylsiloxane having a molecular weight of 500-.
4. The self-repairing polysiloxane elastomer of claim 3, wherein the diisocyanate is one or more of hexamethylene diisocyanate, isophorone diisocyanate, and toluene diisocyanate.
5. The self-repairing polysiloxane elastomer of claim 4, wherein the organic solvent is one or more of toluene, xylene, methylene chloride, chloroform and tetrahydrofuran.
6. The self-repairing polysiloxane elastomer of claim 1 or 2, wherein the cross-linking agent is one or two of triethanolamine and triethylamine; the catalyst is an organic tin catalyst.
7. The preparation method of the self-repairing polysiloxane elastomer as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
according to the mass portion, 150 portions of hydroxyethyl end-blocked polydimethylsiloxane, 5-50 portions of N' N-di-tert-butyl ethylenediamine, 15-100 portions of diisocyanate and 1-5 portions of cross-linking agent are dissolved in 500 portions of organic solvent, 1-5 portions of catalyst are added, and the self-repairing polysiloxane elastomer is obtained after heating and curing in a mold.
8. The use of the self-healing polysiloxane elastomer as claimed in any one of claims 1 to 6 as a substrate in the technical field of stretchable electronic materials.
9. The application according to claim 8, characterized in that it comprises the following steps: heating the self-repairing polysiloxane elastomer, spraying the nano conductive material dispersion liquid on the polysiloxane elastomer, and standing to prepare the flexible material of the conductive coating.
10. Use according to claim 9, wherein the heating temperature is 50-100 ℃; the nano conductive material dispersion liquid is isopropanol dispersion liquid of a multi-wall carbon nano tube or ethanol dispersion liquid of a silver nano wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245873.4A CN111393651B (en) | 2020-03-31 | 2020-03-31 | Self-repairing polysiloxane elastomer and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245873.4A CN111393651B (en) | 2020-03-31 | 2020-03-31 | Self-repairing polysiloxane elastomer and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111393651A true CN111393651A (en) | 2020-07-10 |
| CN111393651B CN111393651B (en) | 2021-09-21 |
Family
ID=71427797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010245873.4A Active CN111393651B (en) | 2020-03-31 | 2020-03-31 | Self-repairing polysiloxane elastomer and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111393651B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112062970A (en) * | 2020-09-08 | 2020-12-11 | 湖南工业大学 | Self-repairing carbon nanotube-organic silicon composite elastomer and preparation method and application thereof |
| CN112679964A (en) * | 2020-12-28 | 2021-04-20 | 南京柔速科技有限公司 | Silver nanowire/organic silicon elastomer self-repairing flexible material, preparation method thereof and flexible sensor |
| CN113088177A (en) * | 2021-04-01 | 2021-07-09 | 南阳金牛彩印集团有限公司 | Room-temperature self-repairing type polyurethane coating resin and preparation method thereof |
| WO2023160423A1 (en) * | 2022-02-22 | 2023-08-31 | 清华大学 | Polysiloxane elastomer having high transparent conductivity and preparation method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814937A (en) * | 2017-11-17 | 2018-03-20 | 四川大学 | The silicone elastomer and preparation method and application of a kind of repeatable processing of selfreparing |
| CN108003317A (en) * | 2017-12-22 | 2018-05-08 | 四川大学 | A kind of silicone elastomer and its preparation method and application |
| CN108559045A (en) * | 2018-04-23 | 2018-09-21 | 四川大学 | The polyurea materials and preparation method and application of the repeatable processing of selfreparing |
| CN108779223A (en) * | 2016-03-08 | 2018-11-09 | 伊利诺伊大学董事会 | There is the dynamic (dynamical) dynamic urea bond of fast hydrolyzing for polymer |
-
2020
- 2020-03-31 CN CN202010245873.4A patent/CN111393651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108779223A (en) * | 2016-03-08 | 2018-11-09 | 伊利诺伊大学董事会 | There is the dynamic (dynamical) dynamic urea bond of fast hydrolyzing for polymer |
| CN107814937A (en) * | 2017-11-17 | 2018-03-20 | 四川大学 | The silicone elastomer and preparation method and application of a kind of repeatable processing of selfreparing |
| CN108003317A (en) * | 2017-12-22 | 2018-05-08 | 四川大学 | A kind of silicone elastomer and its preparation method and application |
| CN108559045A (en) * | 2018-04-23 | 2018-09-21 | 四川大学 | The polyurea materials and preparation method and application of the repeatable processing of selfreparing |
Non-Patent Citations (2)
| Title |
|---|
| SHUQI LIU ET AL.: "A compliant, self-adhesive and self-healing wearable hydrogel as epidermal strain sensor", 《JOURNAL OF MATERIALS CHEMISTRY C》 * |
| 赵立伟: "自修复有机硅聚合物的结构设计及其性能研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112062970A (en) * | 2020-09-08 | 2020-12-11 | 湖南工业大学 | Self-repairing carbon nanotube-organic silicon composite elastomer and preparation method and application thereof |
| CN112679964A (en) * | 2020-12-28 | 2021-04-20 | 南京柔速科技有限公司 | Silver nanowire/organic silicon elastomer self-repairing flexible material, preparation method thereof and flexible sensor |
| CN113088177A (en) * | 2021-04-01 | 2021-07-09 | 南阳金牛彩印集团有限公司 | Room-temperature self-repairing type polyurethane coating resin and preparation method thereof |
| WO2023160423A1 (en) * | 2022-02-22 | 2023-08-31 | 清华大学 | Polysiloxane elastomer having high transparent conductivity and preparation method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111393651B (en) | 2021-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111393651B (en) | Self-repairing polysiloxane elastomer and preparation method and application thereof | |
| Yang et al. | Assembling of reprocessable polybutadiene-based vitrimers with high strength and shape memory via catalyst-free imine-coordinated boroxine | |
| Zhang et al. | Toughening elastomers using a mussel-inspired multiphase design | |
| Toki et al. | New insights into structural development in natural rubber during uniaxial deformation by in situ synchrotron X-ray diffraction | |
| CN114085537B (en) | Dynamic double-network solid-liquid polysiloxane elastomer and preparation method thereof | |
| CN107814937A (en) | The silicone elastomer and preparation method and application of a kind of repeatable processing of selfreparing | |
| CN112062970B (en) | Self-repairing carbon nanotube-organic silicon composite elastomer and preparation method and application thereof | |
| CN113462169B (en) | MXene-based conductive organic silicon elastomer and preparation method and application thereof | |
| Ma et al. | A transparent self-healing polyurethane–isophorone-diisocyanate elastomer based on hydrogen-bonding interactions | |
| CN112175399A (en) | Flexible repairable conductive organic silicon composite material, preparation method thereof and application of strain sensor | |
| Yan et al. | Mechanically strong, thermally stable, and reprocessable poly (dimethylsiloxane) elastomers enabled by dynamic silyl ether linkages | |
| Yan et al. | A self-healing flexible urea-g-MWCNTs/poly (urethane-sulfide) nanocomposite for sealing electronic devices | |
| Deng et al. | Repairable, reprocessable and recyclable rigid silicone material enabled by dual dynamic covalent bonds crosslinking side-chain | |
| Wu et al. | Reprocessable thermoset organosilicon elastomer with good self-healable and high stretchable properties for flexible electronic devices | |
| Xu et al. | Mechanically strong, reprocessable and thermally stable PDMS/Hexagonal boron nitride composites with desirable thermal conductivities based on dynamic silyl ether linkages | |
| Zhou et al. | Intrinsically self-healing and stretchy poly (urethane-urea) elastomer based on dynamic urea bonds and thiol-ene click reaction | |
| CN110591377A (en) | Preparation method and application of transparent epoxy resin-silicon rubber modified material | |
| CN112251165B (en) | Special prime coat-free platinum vulcanizing agent for combination of metal substrate and silica gel and preparation method thereof | |
| CN110437624B (en) | Transparent bifunctional epoxy resin-silicon rubber block network material | |
| Karami et al. | Self-healing Diels–Alder engineered thermosets | |
| Zhang et al. | Self-healing siloxane elastomers constructed by hierarchical covalent crosslinked networks and reversible dynamic bonds for flexible electronics | |
| Guchait et al. | Synthesis of Polyetheramine-Grafted Epoxidized Natural Rubber and Its Role in Humidity Adhesive Sensors | |
| CN116082644A (en) | Organic silicon elastomer and preparation method thereof, flexible sensor and preparation method thereof | |
| Li et al. | Synthesis and properties of an efficient self-healing material based on Eucommia ulmoides gum | |
| CN116023786B (en) | Self-repairing mixed silicon rubber and preparation and self-repairing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |