A self-healing and recyclable vulcanized rubber, its preparation method and application

A vulcanized rubber and self-healing technology, applied in the field of vulcanized rubber and its preparation, can solve the problems of waste of rubber resources, harsh reaction conditions, complicated processes, etc., and achieve the effects of simple method, easy-to-obtain raw materials, and simple preparation process

Active Publication Date: 2016-08-17
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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  • A self-healing and recyclable vulcanized rubber, its preparation method and application
  • A self-healing and recyclable vulcanized rubber, its preparation method and application
  • A self-healing and recyclable vulcanized rubber, its preparation method and application

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 silica in 600~1000ml of toluene to form a sol, and then add 5~20 parts of grafted Branches (one or a mixture of bis-[γ-(triethoxysilyl)propyl] tetrasulfide and bis-3-(triethoxysilylpropyl)-disulfide), After reacting at 80~110℃ for 6~12h, filtered, washed, and dried to obtain grafted nano-silica), 5 parts of carbon black, bis-[γ-(triethoxysilica) acrylic 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)phenyl phosphite, 2,2,4-tri 1 part of methyl-1,2-dihydroquinoline polymer, 1 part of bis(1,5-pentylene)thiuram tetrasulfide, 1 part of sulfur, and then mix them evenly on a two-roll mill to make You have to mix rubber. After the rubber compound was parked at room temperature for 8 hours, it was thermally vulcanized at 150°C to form a 2mm sheet. After being parked ...

Embodiment 2

[0050] 100 parts of butadiene rubber, 10 parts of pre-grafted nanosilica (the pre-grafting process is the same as in Example 1), 15 parts of carbon black, bis-3-(triethoxysilane propyl)- 10 parts of disulfide, 0.4 part of ferric chloride, 1 part of zinc oxide, 0.5 part of stearic acid, 2 parts of 2,2'-methylenebis-(4-methyl-6-tert-butylphenol), N -(1,3-Dimethyl)butyl-N'-phenyl-p-phenylenediamine 1 part, bis(1,5-pentylene)thiuram tetrasulfide 0.5 part, sulfur 1 part, in turn Mix evenly on a roll mill to obtain a rubber compound. After the rubber compound was parked at room temperature for 8 hours, it was thermally 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 specimen breaks and breaks, the two sections are fully contacted and repaired in 110°C air for 12 hours, and the tensile properties of the material are tested again; then the vulcani...

Embodiment 3

[0052] 100 parts of butadiene rubber, 15 parts of pre-grafted nano-silica (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 part of zinc oxide, 0.5 part of stearic acid, 2 parts of pentaerythritol diisodecyl diphosphite, 2 parts of 2, 6-di-tert-butyl-4-methylphenol, tetraethyl thiuram disulfide 1 part of sulfur and 1.5 parts of sulfur are mixed uniformly on a two-roll mill to obtain a rubber compound. After the rubber compound was parked at room temperature for 8 hours, it was thermally 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 specimen is broken and broken, the two sections are fully contacted and repaired in 110°C air for 12 hours, and the tensile properties of the material are tested again; then the vulcanized rubber composite material is cu...

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PUM

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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 rubber products, and more specifically, relates to a self-repairing and recyclable vulcanized rubber and a preparation method and application thereof. Background technique [0002] In the process of 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 reduces the performance and life of polymer materials. By imitating the self-repairing mechanism of organisms to damage, self-repairing materials came into being and received widespread attention. Self-healing materials can be divided into two categories: foreign aid type and intrinsic type. At present, the technology for rubber self-healing mainly relies on the addition of microcapsules containing repairing agents and ionic polymers (see patents CN104014288, CN103467791, US20080173382 and US20140148555). Since rubber needs to go through...

Claims

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Application Information

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Patent Type & Authority Patents(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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