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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 improving tensile strength and fatigue life, low cost, and reducing stress concentration

Active Publication Date: 2021-09-24
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

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Experimental program
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Effect test

Embodiment 1

[0035]In this embodiment, the base rubber is natural rubber. Each component of the composition of the embodiment is measured in parts by mass, and the specific components are shown in Table 1. The self-healing agent is a liquid nitrile rubber-phenolic resin adhesive system with a core-shell structure prepared by the emulsion compounding 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, 36%-50% aqueous solution is used for formaldehyde, the catalyst is 1%-5% NaOH, and the reaction is heated at 80-95°C for 3 hours to obtain a phenolic resin prepolymerization solution, and then add the liquid The nitrile rubber emulsion is stirred, and the liquid nitrile rubber-phenolic resin microcapsules with a core-shell structure are obtained by adjusting the pH of the solution. The mixing of the rubber composition is carried out by a method commonly used in rubber mixing. The mixed ru...

Embodiment 2

[0038] In this embodiment, neoprene 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 ingredients except the vulcanization system to the internal mixer, and mix for 3 to 4 minutes at a temperature of 100 to 120 Deglue in the range of ℃ to complete the preparation of a section of masterbatch; after the film is parked for 4 hours, add a section of masterbatch to the internal mixer and mix for 2 to 3 minutes. The temperature is in the range of 100 to 110℃ to complete 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 into the internal mixer, mix for 2 to 3 minutes, and discharge the rubber at a temperature within the range of 90-100°C , to complete the preparation of the final rubber mix. The mixed rubber is injected into a mold, pre-s...

Embodiment 3

[0040] In this embodiment, the base rubber is hydrogenated nitrile rubber. The mixing method is as in Example 1, and the sample is vulcanized by a steam plate vulcanizer under the following conditions: the temperature is 161° C., and the time is 10 min, 15 min, and 20 min, respectively. Various performance tests were carried out 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 used for rubber air springs and a preparation method thereof. The components include 100 parts of base rubber, 2 to 8 parts of active agent, and 0 to 50 parts of carbon black in terms of weight ratio. , 0-20 parts of white carbon black, 0-4 parts of silane coupling agent, 1-3 parts of accelerator, 3-6 parts of anti-aging agent, 1-2 parts of vulcanizing agent, 200-600 parts of modified ferromagnetic particles, Restorative agent 1 to 10 parts. Among them, the matrix rubber is composed of natural rubber or chloroprene rubber or hydrogenated nitrile rubber; the active agent is composed of nano-zinc oxide and stearic acid; the white carbon black is highly dispersed precipitated silica; the silane coupling agent is liquid silane Coupling agent Si-69; accelerator is accelerator CBS; anti-aging agent is anti-aging agent 6PPD and anti-aging agent RD; vulcanizing agent is sulfur; self-healing agent is liquid nitrile rubber-phenolic resin. The magnetic sensitive rubber composition of the present application has a tensile strength of over 15 MPa and an elongation at break of over 400%.

Description

technical field [0001] The invention relates to a magnetic sensitive rubber, including a rubber composition composed of modified carbonyl iron powder and a self-repairing agent, in particular to a magnetic sensitive rubber composition used for rubber air springs. [0002] Specifically, the present invention relates to a magnetic-sensitive rubber composition for rubber air springs mainly composed of modified carbonyl iron powder and a self-healing agent 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 sensitive rubber is a type of intelligent material for active control. Magneto-sensitive rubber is a rubber composite material reinforced with micro-nano-scale magnetic powder. Under the action of a magnetic field, its stiffness and damping have a millisecond-level controllable response, which overcomes...

Claims

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Application Information

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Patent Type & Authority Patents(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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