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Magnetic-sensitive rubber composition for rubber air spring, and preparation method thereof

A kind of rubber air spring, magnetic sensitive rubber technology, applied in the direction of spring, low internal friction spring, spring/shock absorber, etc., can solve the fatigue resistance mechanism and anti-fatigue material development and process control is not yet feasible, magnetic sensitive rubber. Low tensile strength, looseness, short circuit, open circuit and other problems, to achieve the effect of low cost, improve tensile strength and life, and improve fatigue life

Active Publication Date: 2020-09-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the "new four modernizations" of automobiles (electrification, intelligence, networking, and sharing) and the development of new energy vehicles (electric vehicle battery modules will loosen, short circuit, and break under the action of the road spectrum, which will affect the quality of the vehicle. Safety, electronic devices such as motors and controllers of new energy vehicles have more stringent requirements for shock absorption) are a brand new drive for active shock absorption of magnetic sensitive rubber; but the fatal problem of magnetic sensitive rubber is stretching Low strength, poor fatigue resistance, its fatigue resistance mechanism and anti-fatigue material development and process control have not yet had a feasible academic idea

Method used

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  • Magnetic-sensitive rubber composition for rubber air spring, and preparation method thereof
  • Magnetic-sensitive rubber composition for rubber air spring, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, natural rubber is used as the base rubber. Each component of the composition of the embodiment is calculated in parts by mass, and the specific components are shown in Table 1. The self-healing agent is a liquid nitrile rubber-phenolic resin bonding system with a core-shell structure prepared by the emulsion compound method, and the morphology and size of the crack self-healing agent are characterized by SEM and TEM. The molar ratio of phenol to formaldehyde is 1:1.2-3.0, the formaldehyde is 36%-50% aqueous solution, the catalyst is 1%-5% NaOH, and the reaction is heated at 80-95℃ for 3h to obtain the phenolic resin prepolymerized liquid, and then add the liquid The nitrile rubber emulsion is stirred and the pH of the solution is adjusted to obtain liquid nitrile rubber-phenolic resin microcapsules with a core-shell structure. The mixing of the rubber composition is carried out by a commonly used method for rubber mixing. The rubber compound is injec...

Embodiment 2

[0038] In this embodiment, neoprene rubber is used as the base rubber. Add natural rubber, modified ferromagnetic particles, carbon black, highly dispersible white carbon black, self-healing agent, and all compounding agents except the vulcanization system into the internal mixer, and mix for 3 to 4 minutes at a temperature of 100 to 120 Discharge the rubber in the range of ℃ to complete the preparation of a masterbatch; after the film is parked for 4 hours, add a masterbatch to the internal mixer, mix for 2 to 3 minutes, and discharge the rubber at a temperature in the range of 100 to 110 ℃. Preparation of the second-stage masterbatch; after the film is parked for 8 hours, add the second-stage masterbatch and all the compounding agents of the vulcanization system in the internal mixer, mix for 2 to 3 minutes, and discharge the rubber in the range of 90-100℃ , Complete the preparation of the final compound. The mixed rubber is injected into a mold, pre-structuralized under a m...

Embodiment 3

[0040] In this embodiment, hydrogenated nitrile rubber is used as the base rubber. The mixing method is as in Example 1. The samples were vulcanized with a steam flat vulcanizer under the conditions: temperature of 161°C and time of 10min, 15min, and 20min. Perform various performance tests according to the corresponding national standards, and the specific performance test results are shown in Table 2.

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Abstract

The invention discloses a magnetic-sensitive rubber composition for a rubber air spring, and a preparation method thereof. The rubber composition comprises, by weight, 100 parts of matrix rubber, 2-8parts of an activator, 0-50 parts of carbon black, 0-20 parts of white carbon black, 0-4 parts of a silane coupling agent, 1-3 parts of an accelerant, 3-6 parts of an anti-aging agent, 1-2 parts of avulcanizing agent, 200-600 parts of modified ferromagnetic particles and 1-10 parts of a self-repairing agent, wherein the matrix rubber is composed of natural rubber or chloroprene rubber or hydrogenated butadiene-acrylonitrile rubber; the activator is composed of nanometer zinc oxide and stearic acid; the white carbon black is high-dispersion precipitated white carbon black; the silane couplingagent is a liquid silane coupling agent Si-69; the accelerant is an accelerant CBS; the anti-aging agent is composed of an anti-aging agent 6PPD and an anti-aging agent RD; the vulcanizing agent is sulfur; and the self-repairing agent is liquid nitrile rubber-phenolic resin. The tensile strength of the magnetic-sensitive rubber composition reaches 15 MPa or above, and the elongation at break is 400% or above.

Description

Technical field [0001] The invention relates to a magnetically sensitive rubber, including a rubber composition composed of modified carbonyl iron powder and a self-healing agent, in particular to a magnetically sensitive rubber composition for rubber air springs. [0002] Specifically, the present invention relates to a magnetically sensitive rubber composition mainly composed of modified carbonyl iron powder and a self-healing agent for rubber air springs and a preparation method thereof. Background technique [0003] With the continuous development and progress of science and technology, mechanical equipment has gradually shifted from passive control to active control. Magnetic rubber is a type of intelligent material with active control. Magneto-sensitive rubber is a rubber composite material reinforced with micro-nano-level magnetic powder. Under the action of a magnetic field, its stiffness and damping have a millisecond-level controllable response, which overcomes the bottle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/02C08L61/06C08L11/00C08L15/00C08K9/06C08K3/18C08K3/04C08K7/26C08K13/06F16F1/36
CPCC08L7/00C08L11/00C08L15/005C08L2205/03F16F1/3605F16F1/3615C08L9/02C08L61/06C08K9/06C08K3/18C08K3/04C08K7/26C08K13/06
Inventor 危银涛王静
Owner TSINGHUA UNIV
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