Preparation method and application of doubly-physically-crosslinked self-healing polymer elastomer

A physical cross-linking, polymer technology, applied in the field of polymer materials, can solve the problem of not being able to improve the mechanical strength, tensile properties and self-healing ability of polymers at the same time High-performance electronic skin, weak hydrogen bonds, unable to improve the mechanical strength of polymers improvement and other issues, to achieve excellent sensing and self-healing performance, simple preparation process, insensitivity to notch and good self-healing effect.

Active Publication Date: 2019-03-19
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrogen bonding is a weaker physical bond that does not allow for a more substantial increase in the mechanical strength of the polymer
[0004] It can be seen that there are key scientific and technical problems in the existing methods and technologies that cannot simultaneously improve the mechanical strength, tensile properties and self-healing ability of polymers to obtain high-performance electronic skin.

Method used

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  • Preparation method and application of doubly-physically-crosslinked self-healing polymer elastomer
  • Preparation method and application of doubly-physically-crosslinked self-healing polymer elastomer
  • Preparation method and application of doubly-physically-crosslinked self-healing polymer elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 A preparation method of dual physical cross-linked self-healing polymer elastomer includes the following steps:

[0029] ⑴ Dissolve 4 g of poly(dimethylsiloxane)-terminated bis(3-aminopropyl) and 2 mL of triphenylamine in 36 mL of chloroform, and stir in an ice bath under the protection of nitrogen for 1 h , Get a mixed solution.

[0030] (2) Add 2 mL of 0.1 g / mL chloroform solution with 2,4-toluene diisocyanate dissolved in 36 mL of mixed solution dropwise, after the addition is complete, stir and react for 1 h to obtain a viscous shape Gel.

[0031] ⑶ Dissolve aluminum trichloride in tetrahydrofuran to obtain solution I with a concentration of 0.5 g / mL;

[0032] ⑷ Completely dissolve 5 g of gel in 60 mL of tetrahydrofuran to obtain solution II;

[0033] ⑸ Pour 2 mL of solution I into 45 mL of solution II and stir at 60°C for 24 hours to obtain a viscous gel;

[0034] ⑹10 mL of colloid was spread on a glass plate treated with octadecyltrichlorosilane, dried at room te...

Embodiment 2

[0035] Example 2 A preparation method of dual physical cross-linked self-healing polymer elastomer includes the following steps:

[0036] ⑴ Dissolve 5 g of poly(dimethylsiloxane)-terminated bis(3-aminopropyl) and 3 mL of triphenylamine in 36 mL of chloroform, and stir in an ice bath under the protection of nitrogen for 3 h , Get a mixed solution.

[0037] ⑵ Add 3 mL of 0.1 g / mL chloroform solution with 2,6-toluene diisocyanate dissolved in 36 mL of mixed solution dropwise, after the addition is complete, stir and react for 2 hours to obtain a viscous shape Gel.

[0038] ⑶ Dissolve ferric nitrate in tetrahydrofuran to obtain solution I with a concentration of 0.6 g / mL;

[0039] ⑷ Completely dissolve 7 g of gel in 60 mL of tetrahydrofuran to obtain solution II;

[0040] ⑸ Pour 3 mL of solution I into 45 mL of solution II and stir at 80°C for 36 h to obtain a viscous colloid;

[0041] ⑹10 mL of colloid was spread on a glass plate treated with octadecyltrichlorosilane, dried at room temper...

Embodiment 3

[0042] Example 3 A preparation method of dual physical cross-linked self-healing polymer elastomer includes the following steps:

[0043] ⑴ Dissolve 6 g of poly(dimethylsiloxane)-terminated bis(3-aminopropyl) and 4 mL of triphenylamine in 36 mL of chloroform, and stir in an ice bath under nitrogen protection for 2 h , Get a mixed solution.

[0044] ⑵Add 4 mL of 0.1 g / mL chloroform solution with 4,4-methyl bis(phenyl isocyanate) dissolved in 36 mL of mixed solution dropwise. After the addition is complete, stir and react for 1.5 h , To get a viscous gel.

[0045] ⑶ Dissolve copper chloride in tetrahydrofuran to obtain a solution I with a concentration of 0.8 g / mL;

[0046] ⑷ Completely dissolve 8 g of gel in 60 mL of tetrahydrofuran to obtain solution II;

[0047] ⑸ Pour 4 mL of solution I into 45 mL of solution II and stir at 70°C for 30 hours to obtain a viscous colloid;

[0048] ⑹10 mL of colloid was spread on a glass plate treated with octadecyltrichlorosilane, dried at room tempera...

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Abstract

The invention relates to a preparation method of doubly-physically-crosslinked self-healing polymer elastomer. The preparation method includes the steps of (1) dissolving modified polydimethylsiloxaneand triphenylamine in trichloromethane, and stirring in ice bath under nitrogen protection to obtain a liquid mixture; (2) dropwise adding into the liquid mixture, trichloromethane solution in whicha diisocyanate is dissolved, stirring to allow reacting to obtain viscous gel; (3) dissolving a metal compound in tetrahydrofuran to obtain solution I; (3) fully dissolving the gel in tetrahydrofuranto obtain solution II; (5) pouring the solution I into the solution II, and stirring to obtain viscous colloid; (6) spreading the colloid on a glass plate treated with octadecyltrichlorosilane, drying, removing the dried film from the glass plate to obtain the doubly-physically-crosslinked self-healing polymer elastomer. The invention also discloses application of the elastomer herein in frictional sensing electrodes. The preparation process is simple and quick, and the elastomer herein is easy to produce in batch.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method and application of a dual-physical crosslinking self-healing polymer elastomer. Background technique [0002] As a soft and easily deformable material, self-healing polymers have been widely used in smart flexible sensors, electronic skin and other fields. In recent years, many researchers have been committed to the development of a polymer with high mechanical strength, good stretchability, and self-healing ability. However, because most self-healing polymers are cross-linked through weak dynamic bonds, it is difficult to obtain high mechanical strength and excellent tensile properties at the same time. [0003] In order to improve the mechanical strength and tensile properties of self-healing polymers, the introduction of an additional network into the polymer network can improve their strength and tensile properties. For example, in 2016, the Duan research grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/02C08K3/16C08J3/24C08J5/18C08G18/61G01L5/00
CPCC08G18/61C08J3/24C08J5/18C08J2375/02C08K2003/164G01L5/0028
Inventor 王金清吴献章杨生荣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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