CN102585768B - Braided fiber-based friction material and preparation method thereof - Google Patents
Braided fiber-based friction material and preparation method thereof Download PDFInfo
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- CN102585768B CN102585768B CN201210003341.5A CN201210003341A CN102585768B CN 102585768 B CN102585768 B CN 102585768B CN 201210003341 A CN201210003341 A CN 201210003341A CN 102585768 B CN102585768 B CN 102585768B
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Abstract
The invention discloses a braided fiber-based friction material and a preparation method thereof. The braided fiber-based friction material comprises the following components in part by weight: 100 parts of organic elastomer, 50 to 150 parts of braided fiber, 0 to 50 parts of reinforcing filler, 0 to 30 parts of friction regulator, and 0.1 to 2 parts of coupling agent. The friction material has the characteristics of stable abrasive resistance and mechanical property at different temperature and is suitable for the technical field of compound materials.
Description
Technical field
The invention belongs to technical field of composite materials, be specifically related to a kind of friction materials, especially relate to a kind of friction materials based on braided fiber and preparation method thereof.
Background technology
Along with the development of new and high technology, it is day by day harsh that the working conditions of engineering machinery, equipment and member becomes, and general material does not have enough physical strengths and wear resistance, be subject to after long-time impact and mechanical friction effect, and very quick-wearing, so that lost efficacy.
Organic resin base frication material is widely used in anticorrosion and wear-resistant coating, in organic resin base frication material, matrix is organic polymer, so after higher envrionment temperature or frictional heat, friction materials can soften, be out of shape, material property also can have greatly changed.In low temperature lower time,, organic resin there will be low temperature brittleness, greatly increases abrasion loss.
Summary of the invention
The object of the invention is to overcome the existing above-mentioned deficiency of prior art, a kind of friction materials based on braided fiber under differing temps with stable wear resistance and mechanical property and preparation method thereof is provided.Its technical scheme is:
Based on a friction materials for braided fiber, each composition and weight thereof consist of: 100 parts of organic elastomers, braided fiber 50-150 part, reinforcing filler 0-50 part, friction modifier 0-30 part, coupling agent 0.1-2 part.
Preferably, described organic elastomer is organic rubber, before material preparation, is in a liquid state or is dissolved in solvent.
Preferably, in organic elastomer organic elastomer, add solidifying agent and vulcanizing agent.Urethane, nitrile rubber, silicon rubber etc. carry out chemically crosslinked by the solidifying agent agreeing with, modified natural rubber, paracril, styrene-butadiene rubber(SBR), isoprene-isobutylene rubber, chloroprene rubber, ethylene-propylene rubber(EPR), viton and acrylic elastomer etc., pass through vulcanizing agent, comprise sulphur (main vulcanizing agent), sulfocompound (as: sulfur monochloride, sulfur dichloride, dimorpholinyl disulfide etc.), selenium (Se), tellurium (Te) and muriate thereof (being the second vulcanizing agent), resene (as: alkylphenol formaldehyde resin, tert.-butylbenzene fluosite etc.), superoxide is (on a small quantity for unsaturated dience rubber, thermotolerance strengthens), quinones, aminated compounds, resene (as: 2123 resol are for isoprene-isobutylene rubber), metallic compound (as: ZnO, MgO etc.) carry out chemically crosslinked.
Preferably, described braided fiber is the cloth of glass fibre or carbon fiber or blend fiber braiding.
Preferably, the thickness of described braided fiber is 0.2-0.5mm.
Preferably, described reinforcing filler comprises cupric oxide, aluminum oxide, silicon carbide, silicon nitride, carbon nanotube, chromic oxide, titanium oxide, silicon oxide, copper bronze, potassium titanate, zinc oxide, norbide.
Preferably, described friction modifier is tetrafluoroethylene, graphite, molybdenumdisulphide.
Preferably, described coupling agent is silane coupling agent.
A preparation method for friction materials based on braided fiber, comprises the following steps:
(1) braided fiber and mineral filler are carried out respectively to surface treatment with coupling agent;
(2) liquid organic elastomer and reinforcing filler, friction modifier are mixed in ratio claimed in claim 1, stir;
(3) the mixed material of step (2) is cast on braided fiber, vacuumize and remove bubble;
(4) ageing 2 hours under room temperature is then incubated 4 hours and solidifies or sulfuration at 120 ℃;
(5) demoulding, is machined to desired size, stand-by.
Further preferably, in described step (2), liquid organic elastomer is containing solidifying agent and vulcanizing agent.
Beneficial effect of the present invention:
Compared with prior art, friction materials of the present invention, take braided fiber as skeleton structure, has higher mechanics and temperature stability, can keep the mechanical property of friction materials under low temperature, normal temperature and high temperature; Organic elastomer material has good toughness at low temperatures, improves the low temperature brittleness of friction materials, reduces abrasion loss; Reinforcing filler and friction modifier can improve the wear resisting property of friction materials; Silane coupling agent improves the consistency between organic/inorganic materials.This friction materials tool can both keep stable mechanical property and wear resisting property under high temperature, normal temperature, low temperature, has good wear resisting property and good weathering resistance.
Embodiment
Below in conjunction with specific embodiment, method of the present invention is described in more detail.
A kind of composition of the friction materials based on braided fiber:
Described braided fiber is the cloth of glass fibre or carbon fiber or blend fiber braiding, is generally 0.2-0.5mm thick, and lamination increases thickness according to demand.Described organic elastomer mainly refers to organic rubber, before material preparation, be in a liquid state or be dissolved in solvent, necessary time, add solidifying agent and vulcanizing agent, after moulding, can under certain low temperature, keep elasticity, the stability of retention under certain high temperature, the selection of concrete rubber kind can be selected according to the consideration of the requirement of performance and cost.Described reinforcing filler comprises one or several in cupric oxide, aluminum oxide, silicon carbide, silicon nitride, carbon nanotube, chromic oxide, titanium oxide, silicon oxide, copper bronze, potassium titanate, zinc oxide, norbide etc.It is a kind of or 2 kinds that described friction modifier comprises in tetrafluoroethylene, graphite, molybdenumdisulphide.Described coupling agent mainly refers to silane coupling agent.
The above-mentioned friction materials preparation method based on braided fiber, comprises the following steps:
(1) braided fiber and mineral filler are carried out respectively to surface treatment with coupling agent;
(2) by raw material example mixing in mass ratio such as liquid organic elastomer (containing solidifying agent and vulcanizing agent) and reinforcing filler, friction modifiers, stir;
(3) above-mentioned mixed material is cast on braided fiber, vacuumize and remove bubble;
(4) ageing 2 hours under room temperature is then incubated 4 hours and solidifies or sulfuration at 120 ℃;
(5) demoulding, is machined to desired size, stand-by.
Generally speaking, friction materials of the present invention has the feature such as mechanical property and wear resisting property stable under differing temps.
Embodiment 1: a kind of friction materials based on braided fiber, it consists of: 100 parts of urethane (containing solidifying agent), 50 parts of braided glass fibre cloth, 0.1 part of silane resin acceptor kh-550.
Utilize said ratio to make friction materials, comprise the following steps:
(1) by textile sheet coupling agent treatment, dry;
(2) urethane is cast on braided fiber, vacuumize and remove bubble;
(3) ageing 2 hours under room temperature is then incubated 4 hours at 120 ℃;
(4) demoulding, is machined to desired size, stand-by.
Embodiment 2: a kind of friction materials based on braided fiber, it consists of: 100 parts of urethane (containing solidifying agent), 150 parts of braided glass fibre cloth, 50 parts, reinforcing filler aluminum oxide, 30 parts of friction modifier molybdenumdisulphide, 2 parts of silane resin acceptor kh-550s.
Utilize said ratio to make friction materials, comprise the following steps:
(1) by braided glass fibre coupling agent (1 part) processing for cloth, dry;
(2) by aluminum oxide and coupling agent (1 part) processing for molybdenumdisulphide, dry;
(3) by raw material example mixing in mass ratio such as liquid polyurethane (containing solidifying agent) and reinforcing filler, friction modifiers, stir;
(2). above-mentioned mixed solution is cast on braided fiber, vacuumize and remove bubble;
(4) ageing 2 hours under room temperature is then incubated 4 hours at 120 ℃;
(5) demoulding, is machined to desired size, stand-by.
Embodiment 3: a kind of friction materials based on braided fiber, it consists of: 100 parts of urethane (containing solidifying agent), 100 parts of braided glass fibre cloth, 30 parts, reinforcing filler aluminum oxide, 15 parts of friction modifier molybdenumdisulphide, 0.3 part of silane resin acceptor kh-550.
Utilize said ratio to make friction materials, comprise the following steps:
(1) by braided glass fibre coupling agent (0.2 part) processing for cloth, dry;
(2) by aluminum oxide and coupling agent (0.1 part) processing for molybdenumdisulphide, dry;
(3) by raw material example mixing in mass ratio such as liquid polyurethane (containing solidifying agent) and reinforcing filler, friction modifiers, stir;
(2) above-mentioned mixed solution is cast on braided fiber, vacuumize and remove bubble;
(4) ageing 2 hours under room temperature is then incubated 4 hours at 120 ℃;
(5) demoulding, is machined to desired size, stand-by.
Data in above embodiment refer to table 1
Table 1
The above; it is only preferably embodiment of the present invention; protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in, the simple change of the technical scheme that can obtain apparently or equivalence replace all fall within the scope of protection of the present invention.
Claims (2)
1. the friction materials based on braided fiber, is characterized in that, each composition and weight thereof consist of: 100 parts of organic elastomers, braided fiber 50-150 part, reinforcing filler 0-50 part, and friction modifier 0-30 part, coupling agent 0.1-2 part:
Described organic elastomer is organic rubber, before material preparation, is in a liquid state or is dissolved in solvent;
In described organic elastomer, add solidifying agent and vulcanizing agent;
Described braided fiber is the cloth of glass fibre or carbon fiber or blend fiber braiding;
The thickness of described braided fiber is 0.2-0.5mm;
Described reinforcing filler comprises cupric oxide, aluminum oxide, silicon carbide, silicon nitride, carbon nanotube, chromic oxide, titanium oxide, silicon oxide, copper bronze, potassium titanate, zinc oxide, norbide;
Described friction modifier is tetrafluoroethylene, graphite, molybdenumdisulphide;
Described coupling agent is silane coupling agent.
2. a preparation method for the friction materials based on braided fiber claimed in claim 1, is characterized in that, comprises the following steps:
(1) braided fiber, reinforcing filler and friction modifier are carried out respectively to surface treatment with coupling agent;
(2) liquid organic elastomer and reinforcing filler, friction modifier are mixed in ratio claimed in claim 1, stir;
(3) the mixed material of step (2) is cast on braided fiber, vacuumize and remove bubble;
(4) under room temperature after ageing, then heat preservation solidification or sulfuration at a certain temperature;
(5) demoulding, is machined to desired size, stand-by;
In described step (2), liquid organic elastomer is containing solidifying agent and vulcanizing agent.
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