Graphene modified paper-based friction material and preparation method

Abstract

The invention relates to a graphene modified paper-based friction material and a preparation method. Graphene is introduced into a formula system in a friction performance modifier manner, and components of the paper-based friction material comprise, by weight, 15-35% of reinforced fibers, 10-20% of filling materials, 15-25% of friction performance modifiers, 25-45% of binders, and 1-3% of grapheme. The preparation method comprises the steps of evenly dispersing the reinforced fibers, the friction performance modifiers and the filling materials into water, obtaining a friction material prefab in a papermaking moulding manner and drying the friction material prefab, and obtaining a paper-based friction piece through resin impregnation and hot-pressing solidification. Compared with a traditional preparation method, according to the prepared paper-based friction material, friction performance and abrasion performance of the paper-based friction material can be both promoted, the dynamic friction coefficient is increased from 0.08-0.12 to 0.15-0.17, and the wear rate is reduced from <=6*10<-8>cm<3> / J of the prior art to <=3*10<-8>cm<3> / J.

Description

technical field

[0001] The invention belongs to the field of composite materials, and in particular relates to a graphene-modified paper-based friction material and a preparation method thereof. Background technique

[0002] Paper-based friction material is a friction material formed by prefabricating reinforced fibers, friction performance regulators, fillers, and then impregnated with resin and hot-pressed by using papermaking pulping and papermaking processes. Paper-based friction materials have the advantages of low production cost, stable dynamic friction coefficient, close dynamic / static friction coefficient ratio, stable lamination performance, low wear rate, long service life, etc., and have gradually replaced resin-based friction materials and metal-based friction materials. With the development of motor vehicles in the direction of high speed and heavy load, higher requirements are put forward for the performance of paper-based friction materials, such as moderate ...

Examples

Embodiment 1

[0030] Step 1: dissolving the resin in absolute ethanol to prepare a resin solution with a mass fraction of 25%, then letting the resin solution stand for 24 hours to fully dissolve it, and sealing it for storage to obtain solution A.

[0031] Step 2, take by weighing filler altogether 12.9g, be respectively mineral powder 3.25g, chromite powder 3.97g, fluorite powder 0.72g, barium sulfate 0.72g, aluminum oxide 2.17g, phenolic resin particle 2g, carbon black 0.07g; The weighed powdery raw materials were sequentially added into the high-speed mixer, and the mixture was mixed for 3-5 minutes to obtain a uniformly mixed mixture B.

[0032] Step 3: Weigh 0.89g of graphene; weigh a total of 22.9g of reinforcing fibers, which are respectively carbon fiber 6.5g, aramid fiber 6.5g, and wood fiber 9.9g; weigh a total of 16.5g of friction performance regulators, which are respectively stearic acid Zinc 0.5g, black rubber powder 16g; graphene, reinforcing fiber, friction modifier and com...

Embodiment 2

[0037] Step 1: dissolving the resin in absolute ethanol to prepare a resin solution with a mass fraction of 25%, then letting the resin solution stand for 24 hours to fully dissolve it, and sealing it for storage to obtain solution A.

[0038] Step 2, take by weighing filler altogether 12.9g, be respectively mineral powder 3.25g, chromite powder 3.97g, fluorite powder 0.72g, barium sulfate 0.72g, aluminum oxide 2.17g, phenolic resin particle 2g, carbon black 0.07g; The weighed powdery raw materials were sequentially added into the high-speed mixer, and the mixture was mixed for 3-5 minutes to obtain a uniformly mixed mixture B.

[0039] Step 3: Weigh 1.8g of graphene; weigh a total of 22.9g of reinforcing fibers, which are respectively carbon fiber 6.5g, aramid fiber 6.5g, and wood fiber 9.9g; weigh a total of 16.5g of friction performance regulators, which are respectively stearic acid Zinc 0.5g, black rubber powder 16g; graphene, reinforcing fiber, friction modifier and comp...

Embodiment 3

[0044] Step 1: dissolving the resin in absolute ethanol to prepare a resin solution with a mass fraction of 25%, then letting the resin solution stand for 24 hours to fully dissolve it, and sealing it for storage to obtain solution A.

[0045] Step 2, take by weighing filler altogether 12.9g, be respectively mineral powder 3.25g, chromite powder 3.97g, fluorite powder 0.72g, barium sulfate 0.72g, aluminum oxide 2.17g, phenolic resin particle 2g, carbon black 0.07g; The weighed powdery raw materials were sequentially added into the high-speed mixer, and the mixture was mixed for 3-5 minutes to obtain a uniformly mixed mixture B.

[0046] Step 3: Weigh 2.75g of graphene; weigh a total of 22.9g of reinforcing fibers, which are respectively carbon fiber 6.5g, aramid fiber 6.5g, and wood fiber 9.9g; weigh a total of 16.5g of friction performance regulators, which are respectively stearic acid Zinc 0.5g, black rubber powder 16g; graphene, reinforcing fiber, friction modifier and com...

technical field

[0001] The invention belongs to the field of composite materials, and in particular relates to a graphene-modified paper-based friction material and a preparation method thereof. Background technique

[0002] Paper-based friction material is a friction material formed by prefabricating reinforced fibers, friction performance regulators, fillers, and then impregnated with resin and hot-pressed by using papermaking pulping and papermaking processes. Paper-based friction materials have the advantages of low production cost, stable dynamic friction coefficient, close dynamic / static friction coefficient ratio, stable lamination performance, low wear rate, long service life, etc., and have gradually replaced resin-based friction materials and metal-based friction materials. With the development of motor vehicles in the direction of high speed and heavy load, higher requirements are put forward for the performance of paper-based friction materials, such as moderate ...

Examples

Embodiment 1

[0030] Step 1: dissolving the resin in absolute ethanol to prepare a resin solution with a mass fraction of 25%, then letting the resin solution stand for 24 hours to fully dissolve it, and sealing it for storage to obtain solution A.

[0031] Step 2, take by weighing filler altogether 12.9g, be respectively mineral powder 3.25g, chromite powder 3.97g, fluorite powder 0.72g, barium sulfate 0.72g, aluminum oxide 2.17g, phenolic resin particle 2g, carbon black 0.07g; The weighed powdery raw materials were sequentially added into the high-speed mixer, and the mixture was mixed for 3-5 minutes to obtain a uniformly mixed mixture B.

[0032] Step 3: Weigh 0.89g of graphene; weigh a total of 22.9g of reinforcing fibers, which are respectively carbon fiber 6.5g, aramid fiber 6.5g, and wood fiber 9.9g; weigh a total of 16.5g of friction performance regulators, which are respectively stearic acid Zinc 0.5g, black rubber powder 16g; graphene, reinforcing fiber, friction modifier and com...

Embodiment 2

[0037] Step 1: dissolving the resin in absolute ethanol to prepare a resin solution with a mass fraction of 25%, then letting the resin solution stand for 24 hours to fully dissolve it, and sealing it for storage to obtain solution A.

[0038] Step 2, take by weighing filler altogether 12.9g, be respectively mineral powder 3.25g, chromite powder 3.97g, fluorite powder 0.72g, barium sulfate 0.72g, aluminum oxide 2.17g, phenolic resin particle 2g, carbon black 0.07g; The weighed powdery raw materials were sequentially added into the high-speed mixer, and the mixture was mixed for 3-5 minutes to obtain a uniformly mixed mixture B.

[0039] Step 3: Weigh 1.8g of graphene; weigh a total of 22.9g of reinforcing fibers, which are respectively carbon fiber 6.5g, aramid fiber 6.5g, and wood fiber 9.9g; weigh a total of 16.5g of friction performance regulators, which are respectively stearic acid Zinc 0.5g, black rubber powder 16g; graphene, reinforcing fiber, friction modifier and comp...

Embodiment 3

[0044] Step 1: dissolving the resin in absolute ethanol to prepare a resin solution with a mass fraction of 25%, then letting the resin solution stand for 24 hours to fully dissolve it, and sealing it for storage to obtain solution A.

[0045] Step 2, take by weighing filler altogether 12.9g, be respectively mineral powder 3.25g, chromite powder 3.97g, fluorite powder 0.72g, barium sulfate 0.72g, aluminum oxide 2.17g, phenolic resin particle 2g, carbon black 0.07g; The weighed powdery raw materials were sequentially added into the high-speed mixer, and the mixture was mixed for 3-5 minutes to obtain a uniformly mixed mixture B.

[0046] Step 3: Weigh 2.75g of graphene; weigh a total of 22.9g of reinforcing fibers, which are respectively carbon fiber 6.5g, aramid fiber 6.5g, and wood fiber 9.9g; weigh a total of 16.5g of friction performance regulators, which are respectively stearic acid Zinc 0.5g, black rubber powder 16g; graphene, reinforcing fiber, friction modifier and com...

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