Application of micro-capsule self-repair technology in automobile brake shoe made of composite material

A technology of composite materials and brake pads, which is applied in the application field of microcapsule self-repair technology in composite automobile brake pads, can solve problems such as poor wear performance and high noise, and achieve the elimination of safety hazards, vibration reduction and noise reduction performance Good, the effect of prolonging the service life

Inactive Publication Date: 2010-01-06
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the braking process of the current disc-type automobile brake pads. According to the principle of self-repair technology, the self-repair microcapsules are embedded in the composite material automobile brake pads, and a kind of self-repair microcapsules is designed. A new type of composite material automobile brake pad to improve the problems of loud noise, poor wear performance and risk of fracture when impacted and sheared during the braking process of automobiles

Method used

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  • Application of micro-capsule self-repair technology in automobile brake shoe made of composite material
  • Application of micro-capsule self-repair technology in automobile brake shoe made of composite material
  • Application of micro-capsule self-repair technology in automobile brake shoe made of composite material

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Effect test

Embodiment 1

[0015] Embodiment 1, the composite material of the novel composite material automobile brake pad that contains self-healing microcapsules is made up of following material (by weight percentage): Nano-modified resin 10.8%, composite mineral fiber 18.1%, organic fiber 6%, Mineral fiber 3%, ceramic fiber 5.3%, artificial graphite 6.5%, barite 8%, diatomaceous earth 4.5%, chromite powder 3.6%, potassium feldspar 3.8%, zircon 2.2%, antimony sulfide 3.2% , expanded frog stone powder 3.6%, iron black 1.8%, aluminum powder 4.2%, mica 3.1%, coke powder 2.2%, nitrile rubber powder 3.5%, tire powder 4.6%, zeolite 1.2%, polyurea formaldehyde coated dicyclopentadiene Diene (DCPD) microcapsules 0.8%.

[0016] Mix the above materials evenly; put them into the die of the vulcanizing machine for hot pressing, the pressing temperature is 170°C±10°C, the pressing pressure is 14MPa±0.5MPa, keep the heat and pressure for 15 minutes, and press it into brake pads; put the brake pads into the power ...

Embodiment 2

[0021] Embodiment 2, the composite material of the novel composite material automobile brake pad that contains self-repairing microcapsule is made up of following material (by weight percentage): 9.6% of nano-modified resin, 19.6% of composite mineral fiber, 7.2% of organic fiber, Mineral fiber 2.6%, ceramic fiber 4.2%, artificial graphite 7.5%, barite 7.6%, diatomaceous earth 2.5%, chromite powder 4.4%, potassium feldspar 2.8%, zircon 3.2%, antimony sulfide 2.6% , expanded frog stone powder 5.6%, iron black 3.2%, aluminum powder 3.0%, mica 2.1%, coke powder 2.8%, nitrile rubber powder 2.5%, tire powder 2.8%, zeolite 1.8%, polyurea formaldehyde coated dicyclopentadiene Diene (DCPD) microcapsules 2.4%.

[0022] Mix the above materials evenly; put them into the die of the vulcanizing machine for hot pressing, the pressing temperature is 190 °C ± 10 °C, the pressing pressure is 16 MPa ± 0.5 MPa, heat preservation and pressure for 12 minutes, and press into brake pads; put the bra...

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Abstract

The invention discloses application of micro-capsule self-repair technology in automobile brake shoe made of a composite material. The novel automobile brake shoe made of the composite material which contains self-repair micro-capsules selects dicyclpentadiene (DCPD) microcapsules coated with poly(urea-formaldehyde) as the self-repair micro-capsules, takes an inorganic nano-modified phenolic resin as a matrix and composite mineral fiber (FKF fiber) as main reinforced fiber, is added with a small amount of other fiber-assisted enhanced hybrid reinforcements such as glass fiber and Dutch rock wool at the same time, selects ten materials such as flaky vermiculite, barite, chromite powder, fluorite, calcium carbonate and the like as friction-increasing fillers, selects three materials such as grain graphite and the like as friction-reducing fillers, selects three materials such as cashew nut shell oil friction powder and the like as organic fillers, and is developed according to preferable process conditions. When the brake shoe produces a micro-crack during the friction and wear, the stress concentration of the tip of the crack can cause the rupture of the micro-capsules, a repair agent is released to the surface of the crack by capillary action, and then a polymerization reaction is triggered through a catalyst to ensure that fractured surfaces are adhered together, thereby repairing the surface of the crack.

Description

technical field [0001] The technical field of this patent is the application research of new materials in auto parts, which is the interdisciplinary research field of new materials and mechanical disciplines. Background technique [0002] As a new material, composite material has developed rapidly with the continuous progress of science and technology since the 1960s. Microcracks are prone to develop inside composite materials under cyclic thermal or mechanical loading, which is a long-standing problem in the use of polymer materials. For structural composites, these matrix microcracks coalesce, leading to other failure modes such as fiber breakage, matrix cracking, and interfacial debond-slip and delamination. Once a crack is formed in a polymer material, the integrity of the structure and the mechanical and electrical properties of the material will be seriously damaged. This damage, which often occurs deep in the structure, is difficult to detect and nearly impossible t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08K13/04C08K7/02C08J5/14C08F283/00C08F2/44B29C70/42B29C35/02B29C71/02
Inventor 张力孟春玲叶都长
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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