CN105156526A - Preparing method for carbon fiber brake pad composite materials - Google Patents
Preparing method for carbon fiber brake pad composite materials Download PDFInfo
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- CN105156526A CN105156526A CN201510540992.1A CN201510540992A CN105156526A CN 105156526 A CN105156526 A CN 105156526A CN 201510540992 A CN201510540992 A CN 201510540992A CN 105156526 A CN105156526 A CN 105156526A
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Abstract
The invention provides a preparing method for carbon fiber brake pad composite materials. The preparing method comprises the steps of taking and heating ethylene bis stearamide to 150 to 170 DEG C; adding carbon fibers; stirring and cooling; adding polymine, glycerol, methacrylic acid dimethylamino ethyl ester, lecithin and epoxy resin; heating, warming and stirring; cooling to the room temperature to obtain modified carbon fibers; then taking sodium stearyl lactate, alkene amide, ammonium persulfate, paraffins and silicon dioxide; heating, warming and stirring; cooling to the room temperature to obtain mixture A; then mixing the modified carbon fibers and the mixture A; drying and ball milling to obtain mixture B; evenly mixing the mixture B with graphite powder, titanium oxide powder, iron powder, nickel powder, methylsilicone oil and polycarbonate; and sintering in a vacuum sintering furnace to obtain the carbon fiber brake pad composite materials. The carbon fiber brake pad composite materials preparing in the preparing method have good friction braking performance.
Description
Technical field
The invention belongs to technical field of composite materials, be specifically related to a kind of preparation method of carbon fiber brake block composite material.
Background technique
Braking material should have 3 kinds of major functions: 1. friction element, can produce enough large braking moment; 2. heat reservoir, can absorb the net quantity of heat come by transit equipment kinetic transformation, and distribute in time; 3. structural element, can pass to tire by braking moment.This requires that braking material has higher friction factor, thermal conductivity and enough obdurabilities.C/C braking material becomes the study hotspot in brake field abroad from the seventies in last century.The development of China C/C composite material is started in the seventies in last century, progressively becomes study hotspot after the nineties.Started to the research of C/SiC braking material abroad the nineties in last century, after this become rapidly the focus of research both at home and abroad.
Along with the progress of science and technology, automobile is to high speed, environmental protection, energy-conservation, lightweight future development, and this impels brake block to high performance future development.But from current present Research, still there is following problem: 1, binder kind is single: in all raw materials producing brake block, to most temperature-sensitive is exactly resin binder, the quality of binder resistance to high temperature directly determines the quality of brake block heat resistanceheat resistant decline performance, and therefore the exploitation of fire resistant resin is the key of development high performance brake sheet.The binder of the industrial use of current brake block is mostly phenol-formaldehyde resin modified, and selectable limitednumber, cannot meet the demand for development of brake block product high performance, so necessary exploitation is not containing the binder of phenolic resin.2, abrasion mechanism problem.Automobile brake sheet complicated component, this makes the wearing and tearing between it and mating plate also become very complicated.During automobile emergency brake, under the acting in conjunction of high temperature and mechanical force, the series of physical chemical changes such as the interface between brake block and mating plate can occur such as to be oxidized, pyrolysis, granulation, explosion are melted, evaporation and distillation, cause fret wear.In abrasion mechanism, do large quantity research both at home and abroad, but due to the complexity of friction surface, still do not form the theory of a set of maturation so far.Report that many abrasion mechanisms mainly contain adhesive wear, abrasive wear, fatigue wear, thermal wear, but which aspect plays a major role actually, need research further with perfect.3, heat fade problem: mainly concentrate on application aspect to the research of brake block heat fade phenomenon at present, as the heat resistanceheat resistant decline performance selecting fire resistant resin, high-temperature resistant fiber, steel fiber, metallic dust etc. to improve brake block.But fundamentally to address this problem, also need to go deep into systematic research to heat fade mechanism.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and the preparation method providing a kind of carbon fiber brake block composite material, gained carbon fiber brake block composite material has good friction catch performance.
A preparation method for carbon fiber brake block composite material, comprises the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 5 ~ 12 parts, be heated to 150 ~ 170 DEG C, add 20 ~ 30 parts, carbon fiber, stir, cooling, adds polyethyleneimine 2 ~ 4 parts, glycerine 10 ~ 20 parts, Dimethylaminoethyl Methacrylate 3 ~ 5 parts, 1 ~ 6 part, lecithin, epoxy resin 2 ~ 6 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 1 ~ 4 part, alkene acid amides 2 ~ 6 parts, ammonium persulphate 3 ~ 5 parts, 1 ~ 2 part, paraffin, silica 2 ~ 4 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, mixes step 1 gained modified carbon fiber, step 2 gained mixture A, and oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, step 3 gained mixture B5 ~ 12 part are mixed with plumbago 10 ~ 20 parts, titanium dioxide powder 2 ~ 4 parts, iron powder 4 ~ 8 parts, nickel powder 2 ~ 4 parts, methyl-silicone oil 12 ~ 24 parts, polycarbonate (PC) 5 ~ 10 parts, after sintering in vacuum sintering furnace, to obtain final product.
As the further improvement of foregoing invention, in step 1, heating-up temperature is 80 ~ 110 DEG C, and holding time is 20 ~ 30min.
As the further improvement of foregoing invention, in step 2, heating-up temperature is 40 ~ 50 DEG C, and holding time is 20 ~ 30min.
As the further improvement of foregoing invention, in step 3, bake out temperature is 110 ~ 120 DEG C, and drying time is 2 ~ 4h.
As the further improvement of foregoing invention, in step 4, sintering temperature is 1400 ~ 1600 DEG C, and sintering time is 4 ~ 6h, and degree of vacuum is 0.08 ~ 0.1MPa.
As the further improvement of foregoing invention, in step 1, heating and thermal insulation process also needs to add citric acid 5 ~ 10 parts.
As the further improvement of foregoing invention, in step 3, mixed process also needs to add haloflex 4 ~ 6 parts.
Carbon fiber brake block composite material provided by the invention has good friction catch performance.
Embodiment
Embodiment 1
A preparation method for carbon fiber brake block composite material, comprises the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 5 parts, be heated to 150 DEG C, add 20 parts, carbon fiber, stir, cooling, adds polyethyleneimine 2 parts, glycerine 10 parts, Dimethylaminoethyl Methacrylate 3 parts, 1 part, lecithin, epoxy resin 2 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 1 part, alkene acid amides 2 parts, ammonium persulphate 3 parts, 1 part, paraffin, silica 2 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, mixes step 1 gained modified carbon fiber, step 2 gained mixture A, and oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, mixes step 3 gained mixture B5 part with plumbago 10 parts, titanium dioxide powder 2 parts, iron powder 4 parts, nickel powder 2 parts, methyl-silicone oil 12 parts, polycarbonate (PC) 5 parts, after sintering, to obtain final product in vacuum sintering furnace.
In step 1, heating-up temperature is 80 DEG C, and holding time is 30min.
In step 2, heating-up temperature is 40 DEG C, and holding time is 30min.
In step 3, bake out temperature is 110 DEG C, and drying time is 4h.
In step 4, sintering temperature is 1400 DEG C, and sintering time is 6h, and degree of vacuum is 0.08MPa.
Embodiment 2
A preparation method for carbon fiber brake block composite material, comprises the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 7 parts, be heated to 160 DEG C, add 24 parts, carbon fiber, stir, cooling, adds polyethyleneimine 3 parts, glycerine 15 parts, Dimethylaminoethyl Methacrylate 4 parts, 5 parts, lecithin, epoxy resin 3 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 2 parts, alkene acid amides 5 parts, ammonium persulphate 4 parts, 1 part, paraffin, silica 3 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, mixes step 1 gained modified carbon fiber, step 2 gained mixture A, and oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, mixes step 3 gained mixture B9 part with plumbago 14 parts, titanium dioxide powder 3 parts, iron powder 7 parts, nickel powder 3 parts, methyl-silicone oil 17 parts, polycarbonate (PC) 9 parts, after sintering, to obtain final product in vacuum sintering furnace.
In step 1, heating-up temperature is 95 DEG C, and holding time is 25min.
In step 2, heating-up temperature is 45 DEG C, and holding time is 25min.
In step 3, bake out temperature is 115 DEG C, and drying time is 3h.
In step 4, sintering temperature is 1500 DEG C, and sintering time is 5h, and degree of vacuum is 0.09MPa.
Embodiment 3
A preparation method for carbon fiber brake block composite material, comprises the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 12 parts, be heated to 170 DEG C, add 30 parts, carbon fiber, stir, cooling, adds polyethyleneimine 4 parts, glycerine 20 parts, Dimethylaminoethyl Methacrylate 5 parts, 6 parts, lecithin, epoxy resin 6 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 4 parts, alkene acid amides 6 parts, ammonium persulphate 5 parts, 2 parts, paraffin, silica 4 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, mixes step 1 gained modified carbon fiber, step 2 gained mixture A, and oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, mixes step 3 gained mixing B 12 part with plumbago 20 parts, titanium dioxide powder 4 parts, iron powder 8 parts, nickel powder 4 parts, methyl-silicone oil 24 parts, polycarbonate (PC) 10 parts, after sintering, to obtain final product in vacuum sintering furnace.
In step 1, heating-up temperature is 110 DEG C, and holding time is 20min.
In step 2, heating-up temperature is 50 DEG C, and holding time is 20min.
In step 3, bake out temperature is 120 DEG C, and drying time is 2h.
In step 4, sintering temperature is 1600 DEG C, and sintering time is 6h, and degree of vacuum is 0.1MPa.
Embodiment 4
The difference of the present embodiment and embodiment 2 is: in step 1, heating and thermal insulation process also needs to add citric acid 5 ~ 10 parts.
A preparation method for carbon fiber brake block composite material, comprises the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 7 parts, be heated to 160 DEG C, add 24 parts, carbon fiber, stir, cooling, adds polyethyleneimine 3 parts, glycerine 15 parts, Dimethylaminoethyl Methacrylate 4 parts, 5 parts, lecithin, epoxy resin 3 parts, citric acid 8 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 2 parts, alkene acid amides 5 parts, ammonium persulphate 4 parts, 1 part, paraffin, silica 3 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, mixes step 1 gained modified carbon fiber, step 2 gained mixture A, and oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, mixes step 3 gained mixture B9 part with plumbago 14 parts, titanium dioxide powder 3 parts, iron powder 7 parts, nickel powder 3 parts, methyl-silicone oil 17 parts, polycarbonate (PC) 9 parts, after sintering, to obtain final product in vacuum sintering furnace.
In step 1, heating-up temperature is 95 DEG C, and holding time is 25min.
In step 2, heating-up temperature is 45 DEG C, and holding time is 25min.
In step 3, bake out temperature is 115 DEG C, and drying time is 3h.
In step 4, sintering temperature is 1500 DEG C, and sintering time is 5h, and degree of vacuum is 0.09MPa.
Embodiment 5
The difference of the present embodiment and embodiment 2 is: in step 3, mixed process also needs to add haloflex 4 ~ 6 parts.
A preparation method for carbon fiber brake block composite material, comprises the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 7 parts, be heated to 160 DEG C, add 24 parts, carbon fiber, stir, cooling, adds polyethyleneimine 3 parts, glycerine 15 parts, Dimethylaminoethyl Methacrylate 4 parts, 5 parts, lecithin, epoxy resin 3 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 2 parts, alkene acid amides 5 parts, ammonium persulphate 4 parts, 1 part, paraffin, silica 3 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, by step 1 gained modified carbon fiber, step 2 gained mixture A, haloflex 5 parts mixing, oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, mixes step 3 gained mixture B9 part with plumbago 14 parts, titanium dioxide powder 3 parts, iron powder 7 parts, nickel powder 3 parts, methyl-silicone oil 17 parts, polycarbonate (PC) 9 parts, after sintering, to obtain final product in vacuum sintering furnace.
In step 1, heating-up temperature is 95 DEG C, and holding time is 25min.
In step 2, heating-up temperature is 45 DEG C, and holding time is 25min.
In step 3, bake out temperature is 115 DEG C, and drying time is 3h.
In step 4, sintering temperature is 1500 DEG C, and sintering time is 5h, and degree of vacuum is 0.09MPa.
Embodiment 1 to 5 gained sample is carried out testing property, and adopt MM-1000 frictional testing machine to test the braking quality of friction braking material of the present invention, test condition is: inertia 3.8kgfcms
2, specific pressure 100N/cm
2, linear velocity 25m/s.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Flexural strength MPa | 169 | 172 | 176 | 185 | 194 |
| Average dry friction coefficient | 0.34 | 0.35 | 0.32 | 0.45 | 0.52 |
| Average wet friction coefficient | 0.26 | 0.27 | 0.24 | 0.32 | 0.45 |
| Line wear rate μm/face time | 1.05 | 1.04 | 1.06 | 0.98 | 0.89 |
| Fracture toughness MPam 1/2 | 5.12 | 5.13 | 5.14 | 5.47 | 5.67 |
As can be seen from the table, carbon fiber brake block composite material provided by the invention has good friction catch performance, compare by embodiment 2 can find out with embodiment 4, by adding citric acid in modified carbon fiber, particle surface pattern can be improved, the fracture toughness of final friction material is improved.Relatively can being found out by embodiment 2 and embodiment 5, by adding haloflex, the surface electric charge of particle can be changed, make covered effect better, the line wear rate of material is declined.
Claims (7)
1. a preparation method for carbon fiber brake block composite material, is characterized in that: comprise the following steps:
Step 1, with parts by weight, get ethylene bis stearamide 5 ~ 12 parts, be heated to 150 ~ 170 DEG C, add 20 ~ 30 parts, carbon fiber, stir, cooling, adds polyethyleneimine 2 ~ 4 parts, glycerine 10 ~ 20 parts, Dimethylaminoethyl Methacrylate 3 ~ 5 parts, 1 ~ 6 part, lecithin, epoxy resin 2 ~ 6 parts, heating and thermal insulation, stir, be cooled to room temperature, obtain modified carbon fiber;
Step 2, with parts by weight, gets stearoyl lactate 1 ~ 4 part, alkene acid amides 2 ~ 6 parts, ammonium persulphate 3 ~ 5 parts, 1 ~ 2 part, paraffin, silica 2 ~ 4 parts, heating and thermal insulation, stirs, is cooled to room temperature, obtains mixture A;
Step 3, mixes step 1 gained modified carbon fiber, step 2 gained mixture A, and oven dry, ball milling, obtain mixture B;
Step 4, with parts by weight, step 3 gained mixture B5 ~ 12 part are mixed with plumbago 10 ~ 20 parts, titanium dioxide powder 2 ~ 4 parts, iron powder 4 ~ 8 parts, nickel powder 2 ~ 4 parts, methyl-silicone oil 12 ~ 24 parts, polycarbonate (PC) 5 ~ 10 parts, after sintering in vacuum sintering furnace, to obtain final product.
2. the preparation method of carbon fiber brake block composite material according to claim 1, is characterized in that: in step 1, heating-up temperature is 80 ~ 110 DEG C, and holding time is 20 ~ 30min.
3. the preparation method of carbon fiber brake block composite material according to claim 1, is characterized in that: in step 2, heating-up temperature is 40 ~ 50 DEG C, and holding time is 20 ~ 30min.
4. the preparation method of carbon fiber brake block composite material according to claim 1, is characterized in that: in step 3, bake out temperature is 110 ~ 120 DEG C, and drying time is 2 ~ 4h.
5. the preparation method of carbon fiber brake block composite material according to claim 1, is characterized in that:, in step 4, sintering temperature is 1400 ~ 1600 DEG C, and sintering time is 4 ~ 6h, and degree of vacuum is 0.08 ~ 0.1MPa.
6. the preparation method of carbon fiber brake block composite material according to claim 1, is characterized in that: also need to add citric acid 5 ~ 10 parts in heating and thermal insulation process in step 1.
7. the preparation method of carbon fiber brake block composite material according to claim 1, is characterized in that: also need to add haloflex 4 ~ 6 parts in mixed process in step 3.
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| CN201510540992.1A CN105156526A (en) | 2015-08-28 | 2015-08-28 | Preparing method for carbon fiber brake pad composite materials |
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| CN201510540992.1A CN105156526A (en) | 2015-08-28 | 2015-08-28 | Preparing method for carbon fiber brake pad composite materials |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885956A (en) * | 2019-11-03 | 2020-03-17 | 霍山汇能汽车零部件制造有限公司 | Preparation process flow of chassis heat insulation plate |
| CN112594308A (en) * | 2020-12-11 | 2021-04-02 | 黄山菲英汽车零部件有限公司 | Preparation method of high-performance automobile brake pad |
| CN114526302A (en) * | 2022-04-24 | 2022-05-24 | 杭州巍枫减速机械有限公司 | Cold-pressing one-step forming process of disc brake pad |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885956A (en) * | 2019-11-03 | 2020-03-17 | 霍山汇能汽车零部件制造有限公司 | Preparation process flow of chassis heat insulation plate |
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| CN114526302A (en) * | 2022-04-24 | 2022-05-24 | 杭州巍枫减速机械有限公司 | Cold-pressing one-step forming process of disc brake pad |
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