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Vulcanized rubber with self-repairing and recyclability characteristics as well as preparation method and application thereof

A vulcanized rubber and self-repairing technology, which is applied in the field of vulcanized rubber and its preparation, can solve the problems of harsh reaction conditions, waste of rubber resources, complicated process, etc., and achieve the effects of simple method, prolonging service life and simple preparation process

Active Publication Date: 2015-05-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These waste rubber not only cause serious damage to the environment, but also waste precious rubber resources
At present, the recycling of waste rubber mainly relies on adding chemical means such as rubber regeneration agent, vulcanizing agent or accelerator in the rubber recycling process or using physical means such as ultrasound, microwave, high temperature and high pressure for desulfurization and recovery (see patents CN200710008844, CN201310599587, US5904885 and US20120065281, etc.), these recovery methods are relatively complicated and have harsh reaction conditions

Method used

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  • Vulcanized rubber with self-repairing and recyclability characteristics as well as preparation method and application thereof
  • Vulcanized rubber with self-repairing and recyclability characteristics as well as preparation method and application thereof
  • Vulcanized rubber with self-repairing and recyclability characteristics as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 100 parts of butadiene rubber, 20 parts of pre-grafted nano-silica (the pre-grafting process is: disperse 100 parts of Branches (bis-[γ-(triethoxysilyl)propyl]tetrasulfide, bis-3-(triethoxysilylpropyl)-disulfide, or a mixture of two), After reacting at 80~110°C for 6~12h, filter, wash, and dry to obtain grafted nano-silica), 5 parts of carbon black, bis-[γ-(triethoxysilyl)propane Base] 10 parts of tetrasulfide, 0.1 part of copper chloride, 1 part of zinc oxide, 0.5 part of stearic acid, 1 part of tris(2,4-di-tert-butyl)phenylphosphite, 1 part of 2,2,4-tri 1 part of methyl-1,2-dihydroquinoline polymer, 1 part of bis(1,5-pentylidene) thiuram tetrasulfide, and 1 part of sulfur were mixed uniformly on a double-roller mill in turn to prepare Get the rubber compound. After the rubber mixture was parked at room temperature for 8 hours, it was vulcanized at 150°C to form a 2mm sheet. After being parked at room temperature for 24 hours, the mechanical properties of the materia...

Embodiment 2

[0050] With 100 parts of butadiene rubber, 10 parts of nano-silica of pre-grafting treatment (the pre-grafting process is the same as Example 1), 15 parts of carbon black, two-3-(triethoxysilylpropyl)- 10 parts of disulfide, 0.4 parts of ferric chloride, 1 part of zinc oxide, 0.5 parts of stearic acid, 2 parts of 2,2'-methylenebis-(4-methyl-6-tert-butylphenol), N 1 part of -(1,3-dimethyl)butyl-N'-phenyl-p-phenylenediamine, 0.5 part of bis(1,5-pentylidene)thiuram tetrasulfide, 1 part of sulfur, in turn in bis Mix evenly on the roller mill to make the mixed rubber. After the rubber mixture was parked at room temperature for 8 hours, it was vulcanized at 150°C to form a 2mm sheet. After being parked at room temperature for 24 hours, the mechanical properties of the material were measured by tensile testing. After the tensile spline was broken, the two sections were fully contacted, repaired in the air at 110°C for 12 hours, and the tensile properties of the material were tested ...

Embodiment 3

[0052] With 100 parts of butadiene rubber, 15 parts of nano silica through pre-grafting treatment (the pre-grafting process is the same as in Example 1), 10 parts of carbon black, 12 parts of diallyl disulfide, cuprous chloride 1 part, 0.5 parts of zinc oxide, 0.5 parts of stearic acid, 2 parts of pentaerythritol diisodecyl diphosphite, 2 parts of 2, 6-di-tert-butyl-4-methylphenol, 2 parts of tetraethyl turmeric disulfide 1 part of sulfur and 1.5 parts of sulfur were mixed evenly on a double-roll mill in turn to obtain a rubber compound. After the rubber mixture was parked at room temperature for 8 hours, it was vulcanized at 150°C to form a 2mm sheet. After being parked at room temperature for 24 hours, the mechanical properties of the material were measured by tensile testing. After the tensile spline was broken, the two sections were fully contacted, repaired in the air at 110°C for 12 hours, and the tensile properties of the material were tested again; then the vulcanized ...

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Abstract

The invention provides vulcanized rubber with intrinsic self-repairing and recyclability characteristics as well as a preparation method thereof. The vulcanized rubber comprises components in parts by weight as follows: 100 parts of a rubber matrix, 5-30 parts of nano-silica, 5-50 parts of carbon black, 1-20 parts of small liquid-state molecules containing disulfide bonds, 0.1-1 part of a disulfide bond exchange reaction catalyst, 0.5-5 parts of zinc oxide, 0.5-3 parts of stearic acid, 0.1-2 parts of an antioxidant, 0.1-2 parts of an anti-aging agent, 0.5-2 parts of an accelerant and 1-30 parts of sulfur. According to the vulcanized rubber, raw materials are easy to obtain, the preparation method is simple, repeated self-repairing and recycling can be realized, service lives of rubber products can be prolonged, the environmental pollution can be reduced, and petroleum resources can be saved.

Description

technical field [0001] The invention belongs to the field of self-repairing of rubber products, and more specifically relates to a self-repairing and recyclable vulcanized rubber and its preparation method and application. Background technique [0002] During the manufacturing, transportation and use of polymer materials, due to the influence of environmental factors such as heat, force and chemistry, they are prone to damage, which will reduce the performance and life of polymer materials. By imitating the self-healing mechanism of organisms to damage, self-healing materials have emerged as the times require and have attracted widespread attention. Self-healing materials can be divided into two categories: foreign aid type and intrinsic type. At present, the technology of rubber self-repair mainly relies on the addition of repair agent-containing microcapsules and ionomers (see patents CN104014288, CN103467791, US20080173382 and US20140148555). Since rubber needs to go th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08L9/06C08L23/22C08L9/02C08L11/00C08L23/16C08K13/06C08K9/04C08K3/36C08K3/04C08K3/22C08K5/36C08K5/548
CPCC08K3/04C08K3/06C08K3/22C08K3/36C08K5/09C08K9/06C08K13/06C08K2003/2296C08K2201/011C08L9/00C08L7/00C08L23/22C08L9/02C08L11/00
Inventor 向洪平容敏智章明秋
Owner SUN YAT SEN UNIV
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