CN207891299U - A kind of corn straw modification composite fibre enhancing friction material - Google Patents
A kind of corn straw modification composite fibre enhancing friction material Download PDFInfo
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Abstract
A kind of corn straw modification composite fibre enhancing friction material category brake friction material technical field, the brake friction material of the utility model is made of composite fibre pilotaxitic texture layer and packing layer, wherein composite fibre pilotaxitic texture layer is composed of corn straw modification fiber and composite fibre interleaved arrangement, composite fibre is made of modification of aramid fiber and modified polyphenyl and double oxazole fibers, comprehensively utilize the advantage performance of each fiber, enhance friction material thermal stability and wearability, while reducing production cost；The utility model uses composite fibre pilotaxitic texture layer and packing layer alternating pattern, uniformity, the validity with the associativity of basis material and as friction material reinforcement that ensure that fiber dispersion.The utility model provide it is a kind of have the characteristics that friction factor compared with stablize, wear rate is relatively low, heat resistanceheat resistant decline performance is good, endurance of cutting can strong, brake noise is small, the feature of environmental protection is strong, at low cost, comprehensive cost performance is high friction material.
Description
Technical field
The utility model belongs to brake friction material technical field, and in particular to a kind of corn straw modification composite fibre increasing
Strong friction material.
Background technology
Friction material is the critical piece in braking or gearing in transport facility, and the quality of performance will be straight
It connects and influences vehicle safety, stability and comfort.Friction material is usually by binder, reinforcing fiber, frictional behaviour
The materials such as conditioning agent and filler are constituted, and need to meet the requirements such as stable friction factor, low wear rate, low noise, feature of environmental protection height.It passes
The friction material reinforcing fiber of system is prohibited to make usually based on asbestos due to its character of heat-fading is big and belongs to strong carcinogen
With.At this stage, metallic fiber, organic fiber, inorfil and plant fiber are gradually used for friction material instead of asbestos fibre
In material, performance quality has Properties of Friction Materials important influence.Such as：
1. Chinese patent, notification number CN104632949B, day for announcing 2017.02.01, Patent No.
ZL201510073529.0, a kind of utility model of utility model entitled " rice straw composite fiber friction material brake block "
Creation describes a kind of using rice straw composite fiber as the friction material of reinforcement and its manufacturing method.
2. Chinese patent, notification number CN103836094B, day for announcing 2016.08.17, Patent No.
ZL201310496457.1, utility model entitled " a kind of kudzu fiber reinforcement environment-friendly type high performance brake block and its preparation side
The utility model creation of method " describes a kind of using kudzu fiber as the environment-friendly type high performance friction material of reinforcement and its manufacturer
Method.
3. Chinese patent, notification number CN101077912B, day for announcing 2011.03.09, Patent No.
The practicality of ZL200610051629.4, utility model entitled " asbestos-free non-metal friction material and preparation method thereof " are new
Type creation describes a kind of using aramid fiber and inorganic mineral fiber as the non-metallic friction materials of reinforcement and its manufacturing method.
With the fast development of science and technology, friction material is widely applied to every field, such as automobile, machinery, railway, aviation
Deng, therefore it is higher and higher to friction material requirement at this stage.Merely from the component of friction material or technological design side
Face prepares and optimizes the requirement that friction material increasingly can not meet modern friction material.Therefore, it should consider material
Material formula, component modification, material structure, technological design, and take into account adaptability, cost-effectivenes, environmentally friendly sex chromosome mosaicism.
Invention content
The purpose of this utility model is to provide a kind of corn straw modification composite fibre enhancing friction material and preparations
Method prepares a kind of friction material in such a way that modified friction material component, designing material structure, optimization technological process are combined
Material, have both reinforcing fiber and basis material associativity be good, friction factor compared with stablize, wear rate is relatively low, heat resistanceheat resistant decline performance is good,
The features such as endurance of cutting can be strong, brake noise is small, the feature of environmental protection is strong, at low cost, comprehensive cost performance is high.
1. a kind of corn straw modification composite fibre of the utility model enhances friction material, by composite fibre pilotaxitic texture
Layer 2 and packing layer 1 form, and two constituent contents are by mass percentage：Composite fibre pilotaxitic texture layer 8-23%, packing layer 77-
92%；The wherein material of composite fibre pilotaxitic texture layer 2 is corn straw modification fiber and composite fibre, by mass percentage two
Constituent content is：Corn straw modification fiber 75-83%, composite fibre 17-25%, composite fibre is by modification of aramid fiber and changes
Property polyphenyl and double oxazole fibers composition, two constituent contents are by mass percentage：Modification of aramid fiber 1-99%, modified polyphenyl is simultaneously
Double oxazole fiber 1%-99%；It is fine to be divided into odd numbers corn straw modification for corn straw modification fiber in composite fibre pilotaxitic texture layer
Tie up weft A, even numbers corn straw modification filamentary weft B, odd numbers corn straw modification fibre warps C and even numbers corn straw modification
Fibre warps D；Composite fibre is divided into odd numbers composite fibre line E and even numbers composite fibre line F；Odd numbers corn straw modification fiber latitude
Line A and the arrangement of even numbers corn straw modification filamentary weft B alternating parallels, odd numbers corn straw modification fibre warps C and even numbers change
Property corn stalk fiber warp D alternating parallels arrangement；Odd numbers corn straw modification fibre warps C and even numbers corn straw modification are fine
Dimension warp D alternates in odd numbers corn straw modification filamentary weft A and even numbers corn straw modification filamentary weft B, and odd numbers changes
Property corn stalk fiber warp C and even numbers corn straw modification fibre warps D and odd numbers corn straw modification filamentary weft A and pair
The angle α of number corn straw modification filamentary weft B is 45 °；Odd numbers composite fibre line E and even numbers composite fibre line F alternating parallels
Arrangement, and alternate and change with odd numbers in odd numbers corn straw modification filamentary weft A and even numbers corn straw modification filamentary weft B
Property corn stalk fiber warp C and even numbers corn straw modification fibre warps D binding sites, odd numbers composite fibre line E and even numbers are mixed
Condensating fiber line F and odd numbers corn straw modification filamentary weft A and even numbers corn straw modification filamentary weft B angles β is 22.5 °；
Each component content is packing layer 1 by mass percentage：Phenolic resin 10-38%, aramid fiber particle 5-9%, flaky graphite 4-
19%, antimonous sulfide 5-12%, zeolite 3-9%, barium sulfate 11-26%, foam ferrous powder 3-17%, wollastonite 7-15%, red
Vermiculite 2-5%, petroleum coke 7-11%；Packing layer 1 and composite fibre pilotaxitic texture layer 2 arrange alternatively up and down, and top and bottom
End is packing layer 1, the overall thickness L of packing layer 1 and composite fibre pilotaxitic texture layer 21For 30.6-97.5mm, wherein composite fibre
The thickness in monolayer L of pilotaxitic texture layer 22For 0.6-1.5mm, the thickness in monolayer L of top and bottom end packing layer 13For 6.6-10.5mm,
The thickness in monolayer L of remaining packing layer 14For 3.6-6mm
2. the preparation method of the corn straw modification composite fibre enhancing friction material, includes the following steps：
The preparation of 2.1 corn straw modification fibers includes the following steps：
2.1.1 corn stalk fiber is immersed in cleaning agent and is cleaned, cleaning agent is the mixing of ethyl alcohol and calgon
Solution, by mass percentage each component content be：Absolute ethyl alcohol 30-45%, calgon 10-15%, distilled water 40-
60%, scavenging period 15-20min；Again wash with distilled water, cleaning temperature is 35-45 DEG C, scavenging period 3-5min, clearly
Wash number 3-6 times；Drying and processing, treatment temperature is 65-80 DEG C, processing time 1.5-2h, until the moisture content 6- of fiber
10%；
2.1.2 the mixing of step 2.1.1 treated corn stalk fiber is immersed in dimethyl sulfoxide (DMSO) and dimethylbenzene is molten
In liquid, two constituent contents are by mass percentage：Dimethyl sulfoxide (DMSO) 65-75%, dimethylbenzene 25-35%, soaking time 25-
40min；
2.1.3 by step 2.1.2, treated that corn stalk fiber is immersed in mixed solution, and mixed solution presses quality hundred
Divide than each component content and is：Hexamethylene 55-65%, butanol 15-20%, chloroform 10-26%, niobium pentaoxide (Nb2O5)2-
2.5%, ruthenium (Ru) 2-2.5%, soaking temperature are 35-55 DEG C, soaking time 3-3.5h；
2.1.4 step 2.1.3 treated corn stalk fibers are impregnated in organic solvent, ultrasonic vibration, when processing
Between 5-20min, shake frequency 30-60kHz, power 300-900W；Then by corn stalk fiber take out and with distilled water it is clear
It washes, dries, obtain corn straw modification fiber；
The preparation of 2.2 modification of aramid fiber includes the following steps：
2.2.1 aramid fiber is immersed in acetone soln and is cleaned by ultrasonic, processing time 0.5-1h shakes frequency
50-75kHz, power 500-750W, then wash with distilled water, drying；
2.2.2 by step 2.2.1, treated that aramid fiber is immersed in mixed solution, and mixed solution is by mass percentage
Each component content is：Dichloromethane 15-27%, chlorate 5-9%, alcohol 64-80%, then wash with distilled water, and dry；
2.2.3 by step 2.2.2, treated that aramid fiber is immersed in the mixed solution of coupling agent and alcoholic solvent, by matter
Measuring two constituent content of percentage is：Coupling agent 2.5-4.5%, alcoholic solvent 95.5-97.5%, processing time 2-4h；
2.2.4 step 2.2.3 treated aramid fibers are subjected to drying and processing, processing time 1.5-3.5h, processing
Temperature is 45-65 DEG C, obtains modification of aramid fiber；
The preparation of 2.3 modified polyphenyls and double oxazole fibers includes the following steps：
2.3.1 by polyphenyl, simultaneously double oxazole fibers are immersed in the mixed solution of acetone and strong protonic acid, by mass percentage
Two constituent contents are：Acetone 25-35%, strong protonic acid 65-75%, treatment temperature are 50-80 DEG C, processing time 3-5h；
2.3.2 step 2.3.1 treated polyphenyl and double oxazole fibers are immersed in mixed solution and are ultrasonically treated,
Two constituent contents are mixed solution by mass percentage：Alcoholic solvent 35-50%, sour agent 50-65%, processing time 20-
40min shakes frequency 30-80kHz, then power 350-550W is cleaned 4-6 times repeatedly with distilled water, dries；
2.3.3 the mixing for step 2.3.2 treated polyphenyl and double oxazole fibers being immersed in coupling agent and alcoholic solvent is molten
In liquid, two constituent contents are by mass percentage：Coupling agent 2.5%-4.5%, alcoholic solvent 95.5%-97.5%；
2.3.4 step 2.3.3 treated polyphenyl and double oxazole fibers are subjected to drying and processings, processing time 2.5-
4.5h, treatment temperature are 40-75 DEG C, obtain modified polyphenyl and double oxazole fibers；
2.4 composite fibre pilotaxitic texture layers described in 1 by being prepared；
The preparation of 2.5 packing layers includes the following steps：
2.5.1 the preparation of packing layer raw material, packing layer raw material：Phenolic resin 10-38%, aramid fiber particle 5-9%, flakey
Graphite 4-19%, antimonous sulfide 5-12%, zeolite 3-9%, barium sulfate 11-26%, foam ferrous powder 3-17%, wollastonite 7-
15%, red vermiculite 2-5%, petroleum coke 7-11%；
2.5.2 raw material step 2.5.1 prepared is first by wollastonite, red vermiculite, antimonous sulfide, foam ferrous powder, sulfuric acid
In barium, flaky graphite, petroleum coke sequence input batch mixer, 7-15min is uniformly mixed, then by aramid fiber particle, zeolite, phenolic aldehyde
Resin is put into batch mixer, and batch mixing 13-20min obtains packing layer；
The 2.6 composite fibre pilotaxitic texture layers for obtaining the packing layer that step 2.5.2 is obtained with step 2.4 are by " packing layer-
The sequence of composite fibre pilotaxitic texture layer-packing layer " is equably filled in mold successively, and wherein top and bottom end are filler
The packing layer of layer, top and bottom end is 7 with the thickness in monolayer ratio of composite fibre pilotaxitic texture layer:1~11:1, remaining packing layer with
The thickness in monolayer ratio of composite fibre pilotaxitic texture layer is 4:1~6:1；
2.7 packing layers for having loaded step 2.6 and composite fibre pilotaxitic texture layer carry out hot-pressing processing, pressing direction with
Fiber is axially vertical, pressure 150-400MPa, and hot pressing temperature is 140-450 DEG C, dwell time 30-130min, pressurize
Deflation 3-6 times in journey, each deflation time are 7-21s, obtain compacting product；
2.8 are heat-treated the compacting product that step 2.7 obtains, and heating temperature is 90-220 DEG C, soaking time 110-
330min, then cooled to room temperature；
The face vertical with composite fibre pilotaxitic texture layer direction of compacting product after 2.9 pairs of step 2.8 heat treatments carries out pre-
Mill, form brake wear face enhances friction material to get to corn straw modification composite fibre.
Organic solvent described in step 2.1.4 includes ethyl alcohol, ethylene glycol and isopropanol；
Chlorate described in step 2.2.2 includes lithium chloride, calcium chloride, magnesium chloride and potassium chloride；The alcohol includes methanol, second
Alcohol and propyl alcohol；
Coupling agent described in step 2.2.3 includes gamma-aminopropyl-triethoxy-silane, gamma-methyl allyl acyloxypropyl methyl
Dimethoxysilane, γ-(the third oxygen of 2,3- epoxies) propyl-triethoxysilicane, γ-(the third oxygen of 2,3- epoxies) hydroxypropyl methyl diformazan
Oxysilane, (2- methoxyethoxies) silane of vinyl three and vinyl methyl dichlorosilane；The alcoholic solvent include methanol,
Ethyl alcohol, ethylene glycol, isopropanol and n-butanol；
Strong protonic acid described in step 2.3.1 includes pyrovinic acid, polyphosphoric acids and concentrated nitric acid；
Alcoholic solvent described in step 2.3.2 includes methanol, ethyl alcohol, propylene glycol and n-butanol, and sour agent includes pyrovinic acid, poly
Phosphoric acid and formic acid；
Coupling agent described in step 2.3.3 includes γ-chloropropyl triethoxysilane, γ-chloropropyl dichlorosilane, second
Alkenyl three (2- methoxyethoxies) silane, vinyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-(β-ammonia second
Base) aminopropyl trimethoxysilane, γ-(the third oxygen of 2,3- epoxies) propyl-triethoxysilicane, γ-(the third oxygen of 2,3- epoxies) propyl
Methyl dimethoxysilane and vinyl methyl dichlorosilane, the alcoholic solvent include methanol, ethyl alcohol, ethylene glycol, isopropanol and
N-butanol.
The advantageous effect of the utility model compared with prior art is：
1. the utility model is using corn stalk fiber as reinforcement, maize straw is the second largest crop material in China,
Widely distributed, at low cost, collectable stock number is big, but its utilization rate is low, and it is serious to burn phenomenon.It is main former using maize straw
Material prepares friction material, on the one hand greatly reduces the production cost of friction material, is on the other hand the recycling of maize straw
Offer effective way is provided.
2. the utility model uses composite fibre pilotaxitic texture layer and packing layer is alternately arranged structure, fiber point ensure that
Scattered uniformity improves the associativity between fiber and material matrix；The axial direction of fiber at an angle, is dropped with wear direction
Spike protein gene phenomenon in the low progress of material wear, it is ensured that validity of the fiber as friction material reinforcement is improved and rubbed
Wipe the wear-resisting property and mechanical performance of material.
3. the composite fibre pilotaxitic texture layer of the utility model is compiled in collaboration with using corn straw modification fiber and composite fibre group
It knits, comprehensively utilize the advantage performance of each fiber reduces production cost compared with composite fibre, with single corn stalk
Stalk is compared, and thermal stability and wearability are enhanced, and synthesis is cost-effective.
4. the utility model is modified corn stalk fiber, by way of being chemically treated and physical treatment is combined
The comprehensive performance for improving corn stalk fiber, enhances the associativity of composite fibre pilotaxitic texture layer and basis material, to carry
High Properties of Friction Materials.The process is easy to operate, and technological process is short, has not only ensured fibre modification effect, but also improve modification efficiency.
Description of the drawings
Fig. 1 is composite fibre pilotaxitic texture layer schematic diagram
Wherein：A, C is odd number corn straw modification fiber；B, D is even numbers corn straw modification fiber；E is odd number
Number composite fibre；F is even numbers composite fibre；Braid angles of the α between corn straw modification fiber, α=45 °；β is modified beautiful
Braid angle between rice stalk fibre and composite fibre, β=22.5 °.
Fig. 2 is friction material schematic diagram
Wherein：1 is packing layer, i.e., phenolic resin, aramid fiber particle, flaky graphite, antimonous sulfide, zeolite, barium sulfate,
The mixture of foam ferrous powder, wollastonite, red vermiculite, petroleum coke；2 be composite fibre pilotaxitic texture layer, i.e. corn straw modification
The braided fabric of fiber and composite fibre；L1For the overall thickness of packing layer and composite fibre pilotaxitic texture layer；L2Interweave for composite fibre
The thickness in monolayer of structure sheaf；L3For the thickness in monolayer on top and bottom end packing layer；L4For the thickness in monolayer of remaining packing layer.
Specific implementation mode
The utility model is described in detail with reference to specific embodiment, but the protection of the utility model
Range is not limited to this.
Corn straw modification composite fibre described in the utility model enhances friction material by composite fibre pilotaxitic texture layer
It is alternately arranged composition with packing layer, two constituent contents are by mass percentage：Composite fibre pilotaxitic texture layer 8-23%, packing layer
77-92%；Composite fibre pilotaxitic texture layer is formed using corn straw modification fiber and composite fibre combined knitting, composite fibre
It is made of modification of aramid fiber and modified polyphenyl and double oxazole fibers；The modification of composite fibre pilotaxitic texture layer material and structure
Design, not only increases the associativity between fiber and material matrix, it is ensured that fiber is effective as friction material reinforcement
Property, good endurance of cutting energy and wear-resisting property are provided for friction material, while corn stalk fiber and composite fibre press quality
Percentage is designed, and has both improved thermal stability, mechanical performance, wearability, heat resistanceheat resistant degenerative, feature of environmental protection of friction material etc.
Comprehensive performance, and production cost is greatly reduced, improve the synthesis cost performance of friction material；Filler layer material presses quality percentage
It is than each component content：Phenolic resin 10-38%, aramid fiber particle 5-9%, flaky graphite 4-19%, antimonous sulfide 5-
12%, zeolite 3-9%, barium sulfate 11-26%, foam ferrous powder 3-17%, wollastonite 7-15%, red vermiculite 2-5%, petroleum coke
7-11% determines content of each component in friction material, gives full play to the booster action of conditioning agent, to promote friction material
Overall performance and service life ensure stability and reliability of the friction material in braking process.
Embodiment 1
1. two constituent contents are corn straw modification composite fibre enhancing friction material described in by mass percentage：It is compound
Fiber interweaving structural material 8%, filler layer material 92%；Wherein each component content is filler layer material by mass percentage：
Phenolic resin 38%, aramid fiber particle 5%, flaky graphite 4%, antimonous sulfide 5%, zeolite 3%, barium sulfate 26%, foam
Iron powder 3%, wollastonite 7%, red vermiculite 2%, petroleum coke 7%.
2. composite fibre pilotaxitic texture layer material described in, is made through the following steps：
(1) corn stalk fiber is 1. immersed in the mixed solution of ethyl alcohol and calgon (fiber and mixed solution
Mass ratio be 1:22), each component content is by mass percentage：Absolute ethyl alcohol 30%, calgon 15%, distilled water
55%, processing time 15min；Again wash with distilled water, cleaning temperature is 35 DEG C, scavenging period 5min, wash number 6
It is secondary；Drying and processing, treatment temperature is 65 DEG C, processing time 2h, until the moisture content 6% of fiber；2. corn stalk fiber is soaked
(mass ratio of fiber and mixed solution is 1 to bubble in the mixed solution of dimethyl sulfoxide (DMSO) and dimethylbenzene:27), by mass percentage
Two constituent contents are：Dimethyl sulfoxide (DMSO) 65%, dimethylbenzene 35%, soaking time 40min；3. corn stalk fiber is immersed in
(mass ratio of fiber and mixed solution is 1 in mixed solution:32), each component content is by mass percentage：Hexamethylene 65%,
Butanol 15%, chloroform 16%, niobium pentaoxide (Nb2O5) 2%, ruthenium (Ru) 2%, soaking temperature is 55 DEG C, and soaking time is
3.3h；4. corn stalk fiber is immersed in 65wt% isopropanols, (mass ratio of fiber and isopropanol is 1:23), ultrasound shake
It swings, processing time 5min, shakes frequency 60kHz, power 900W；Then by corn stalk fiber take out and with distilled water it is clear
It washes, and dries, obtain corn straw modification fiber.
(2) 1. aramid fiber is immersed in 75wt% acetone solns to (mass ratio of fiber and acetone soln is 1:25) into
Row is cleaned by ultrasonic, processing time 0.5h, shakes frequency 75kHz, power 500W, then wash with distilled water, drying；2. will
Aramid fiber be immersed in mixed solution (mass ratio of fiber and mixed solution be 1:23), mixed solution is each by mass percentage
Constituent content is：Dichloromethane 15%, lithium chloride 5%, methanol 80%；Again wash with distilled water, it and dries；3. by aramid fiber
Be immersed in the mixed solution of coupling agent and alcoholic solvent (mass ratio of fiber and mixed solution be 1:32), by mass percentage two
Constituent content is：Coupling agent γ-(2,3- the third oxygen of epoxy) hydroxypropyl methyl dimethoxysilane 4.5%, isopropanol solvent 95.5%,
Processing time is 2h；4. aramid fiber is carried out drying and processing, processing time 1.5h, treatment temperature is 65 DEG C, is modified
Aramid fiber.
(3) pbo fiber is 1. immersed in the mixed solution of acetone and pyrovinic acid the (mass ratio of fiber and mixed solution
It is 1:21), two constituent contents are by mass percentage：Acetone 35%, pyrovinic acid 65%, treatment temperature is 50 DEG C, when processing
Between be 5h；2. pbo fiber is immersed in mixed solution, (mass ratio of fiber and mixed solution is 1:24) it is ultrasonically treated,
Two constituent contents are mixed solution by mass percentage：N-butanol 50%, polyphosphoric acids 50%, processing time 40min, concussion
Then frequency 30kHz, power 350W are cleaned 4 times repeatedly with distilled water, drying；3. pbo fiber is immersed in coupling agent and alcohol
Mixed solution in (mass ratio of fiber and mixed solution be 1:33), two constituent contents are by mass percentage：Coupling agent γ
(2,3- the third oxygen of epoxy) hydroxypropyl methyl dimethoxysilane 2.5%, methanol 97.5%；4. pbo fiber is subjected to drying and processing,
Processing time is 2.5h, and treatment temperature is 75 DEG C, obtains modified pbo fiber.
(4) composite fibre is made of modification of aramid fiber and modified pbo fiber, and two constituent contents are by mass percentage：
Modification of aramid fiber 99%, modified pbo fiber 1%；
(5) corn straw modification fiber is 1. taken, in horizontal plane, fiber is axial parallel with X-axis, by several corn straw modifications
Fiber is along Y direction successively equidistant arrangement, wherein odd number fiber is denoted as A, even numbers fiber is denoted as B；2. root of fetching is modified beautiful
Rice stalk fibre carries out interspersed fixation, wherein odd number fiber (being denoted as C) inserted mode is according to the directions for being 45 ° braid angle α
Above the A below B, the inserted mode of even numbers fiber (being denoted as D) is to form pilotaxitic texture below A above B；3. will mixing fibre
Dimension carries out interspersed fixation according to the directions for being 22.5 ° braid angle β, wherein the inserted mode of single fiber is BD above AC points
Point lower section, the inserted mode of double joint fiber are to form composite fibre pilotaxitic texture layer below AC points above BD points；4. compound fibre
Two constituent contents are dimension pilotaxitic texture layer material by mass percentage：Corn straw modification fiber 83%, composite fibre 17% are multiple
The thickness in monolayer of condensating fiber pilotaxitic texture layer is 0.6mm.
3. corn straw modification composite fibre enhancing friction material described in is prepared using hot pressing-heat-treating methods, system
Standby process is as follows：
(1) packing layer raw material is put into mixing in batch mixer, batch mixing sequence is wollastonite, red vermiculite, antimonous sulfide, bubble
In foam iron powder, barium sulfate, flaky graphite, petroleum coke input batch mixer, batch mixing 7min, then by aramid fiber particle, zeolite, phenolic aldehyde
Resin is put into batch mixer, batch mixing 20min.
(2) by packing layer obtained and composite fibre pilotaxitic texture layer by " packing layer-composite fibre pilotaxitic texture layer-is filled out
The sequence of the bed of material " is equably filled in mold successively, and wherein top and bottom end is packing layer, the packing layer of top and bottom end with
The thickness in monolayer ratio of composite fibre pilotaxitic texture layer is 11:1, the thickness in monolayer of remaining packing layer and composite fibre pilotaxitic texture layer
Than being 6:1, i.e. the overall thickness L of packing layer and composite fibre pilotaxitic texture layer1For 30.6mm, wherein composite fibre pilotaxitic texture layer
Thickness in monolayer L2For 0.6mm, the thickness in monolayer L of top and bottom end packing layer3For 6.6mm, the thickness in monolayer of remaining packing layer
L4For 3.6mm.
(3) the composite fibre pilotaxitic texture layer finished will be loaded and packing layer carries out hot-pressing processing, pressure 150MPa, heat
It is 140 DEG C, dwell time 130min to press temperature, carries out deflating 3 times in pressure maintaining period, and each deflation time is 21s, compacting side
To axially vertical with fiber.
(4) obtained compacting product are heat-treated, heating temperature is 90 DEG C, soaking time 190min, heating temperature
It it is 180 DEG C, soaking time 140min, then cooled to room temperature will be vertical with composite fibre pilotaxitic texture layer direction
Face carries out pre-grinding, obtains brake wear face, becomes corn straw modification composite fibre enhancing friction material.
The range of friction coefficients of the friction material produced by above-described embodiment process is 0.357-0.462, abrasion
Rate is 0.26 × 10-7cm3/Nm-0.49×10-7cm3/Nm。
Embodiment 2
1. two constituent contents are corn straw modification composite fibre enhancing friction material described in by mass percentage：It is compound
Fiber interweaving structural material 23%, filler layer material 77%；Wherein each component content is filler layer material by mass percentage：
Phenolic resin 10%, aramid fiber particle 9%, flaky graphite 7%, antimonous sulfide 12%, zeolite 9%, barium sulfate 11%, bubble
Foam iron powder 11%, wollastonite 15%, red vermiculite 5%, petroleum coke 11%.
2. composite fibre pilotaxitic texture layer material described in, is made through the following steps：
(1) corn stalk fiber is 1. immersed in the mixed solution of ethyl alcohol and calgon (fiber and mixed solution
Mass ratio be 1:24), each component content is by mass percentage：Absolute ethyl alcohol 45%, calgon 10%, distilled water
45%, processing time 20min；Again wash with distilled water, cleaning temperature is 45 DEG C, scavenging period 3min, wash number 3
It is secondary；Drying and processing, treatment temperature is 80 DEG C, processing time 1.5h, until the moisture content 10% of fiber；2. by corn stalk fiber
Be immersed in the mixed solution of dimethyl sulfoxide (DMSO) and dimethylbenzene (mass ratio of fiber and mixed solution be 1:25), by quality percentage
It is than two constituent contents：Dimethyl sulfoxide (DMSO) 75%, dimethylbenzene 25%, soaking time 25min；3. corn stalk fiber is impregnated
(mass ratio of fiber and mixed solution is 1 in mixed solution:30), each component content is by mass percentage：Hexamethylene
55%, butanol 20%, chloroform 20%, niobium pentaoxide (Nb2O5) 2.5%, ruthenium (Ru) 2.5%, soaking temperature is 35 DEG C, is impregnated
Time is 3.5h；4. corn stalk fiber is immersed in 75wt% ethyl alcohol, (mass ratio of fiber and ethyl alcohol is 1:21), ultrasonic
Concussion, processing time 20min shake frequency 30kHz, power 300W；Then corn stalk fiber is taken out and uses distilled water
Cleaning, and dry, obtain corn straw modification fiber.
(2) 1. aramid fiber is immersed in 65wt% acetone solns to (mass ratio of fiber and acetone soln is 1:23) into
Row is cleaned by ultrasonic, processing time 1h, shakes frequency 50kHz, power 750W, then wash with distilled water, drying；2. by fragrant
Synthetic fibre fiber be immersed in mixed solution (mass ratio of fiber and mixed solution be 1:22), mixed solution each group by mass percentage
Point content is：Dichloromethane 27%, lithium chloride 9%, methanol 64%；Again wash with distilled water, it and dries；3. aramid fiber is soaked
(mass ratio of fiber and mixed solution is 1 to bubble in the mixed solution of coupling agent and alcoholic solvent:33), by mass percentage two groups
Point content is：Coupling agent gamma-methyl allyl acyloxypropyl methyl dimethoxysilane 2.5%, methanol solvate 97.5%, when processing
Between be 4h；4. aramid fiber is carried out drying and processing, processing time 3.5h, treatment temperature is 45 DEG C, obtains modifying aramid fiber fibre
Dimension.
(3) pbo fiber is 1. immersed in the mixed solution of acetone and pyrovinic acid the (mass ratio of fiber and mixed solution
It is 1:23), two constituent contents are by mass percentage：Acetone 25%, concentrated nitric acid 75%, treatment temperature are 80 DEG C, processing time
For 3h；2. pbo fiber is immersed in mixed solution, (mass ratio of fiber and mixed solution is 1:22) it is ultrasonically treated,
Two constituent contents are mixed solution by mass percentage：Propylene glycol 35%, pyrovinic acid 65%, processing time 20min, concussion
Then frequency 80kHz, power 550W are cleaned 6 times repeatedly with distilled water, drying；3. by pbo fiber be immersed in coupling agent and
(mass ratio of fiber and mixed solution is 1 in the mixed solution of alcohol:31), two constituent contents are by mass percentage：Coupling agent
γ-aminopropyl trimethoxysilane 4.5%, ethylene glycol 95.5%；4. pbo fiber is carried out drying and processing, processing time is
4.5h, treatment temperature are 40 DEG C, obtain modified pbo fiber.
(4) composite fibre is made of modification of aramid fiber and modified pbo fiber, and two constituent contents are by mass percentage：
Modification of aramid fiber 1%, modified pbo fiber 99%；
(5) 1. 2. 3. with it is described in embodiment 1 identical；4. two groups by mass percentage of composite fibre pilotaxitic texture layer material
Point content is：The thickness in monolayer of corn straw modification fiber 75%, composite fibre 25%, composite fibre pilotaxitic texture layer is
1.5mm。
3. corn straw modification composite fibre enhancing friction material described in is prepared using hot pressing-heat-treating methods, system
Standby process is as follows：
(1) packing layer raw material is put into mixing in batch mixer, batch mixing sequence is wollastonite, red vermiculite, antimonous sulfide, bubble
In foam iron powder, barium sulfate, flaky graphite, petroleum coke input batch mixer, batch mixing 15min, then by aramid fiber particle, zeolite, phenol
Urea formaldehyde is put into batch mixer, batch mixing 13min.
(2) filler layer material obtained and composite fibre pilotaxitic texture layer material are pressed into " packing layer-composite fibre single fisherman's knot
The sequence of structure layer-packing layer " is equably filled in mold successively, and wherein top and bottom end are packing layer, top and bottom end
The thickness in monolayer ratio of packing layer and composite fibre pilotaxitic texture layer is 7:1, remaining packing layer and composite fibre pilotaxitic texture layer
Thickness in monolayer ratio is 4:1, i.e. the overall thickness L of packing layer and composite fibre pilotaxitic texture layer1For 97.5mm, wherein composite fibre is handed over
Knit the thickness in monolayer L of structure sheaf2For 1.5mm, the thickness in monolayer L of top and bottom end packing layer3For 10.5mm, remaining packing layer
Thickness in monolayer L4For 6mm.
(3) the composite fibre pilotaxitic texture layer finished will be loaded and packing layer carries out hot-pressing processing, pressure 400MPa, heat
It is 450 DEG C, dwell time 30min to press temperature, carries out deflating 4 times in pressure maintaining period, and each deflation time is 7s, pressing direction
It is axially vertical with fiber.
(4) obtained compacting product are heat-treated, heating temperature is 130 DEG C, soaking time 120min, heating temperature
It it is 190 DEG C, soaking time 100min, then cooled to room temperature will be vertical with composite fibre pilotaxitic texture layer direction
Face carries out pre-grinding, obtains brake wear face, becomes corn straw modification composite fibre enhancing friction material.
The range of friction coefficients of the friction material produced by above-described embodiment process is 0.348-0.469, abrasion
Rate is 0.32 × 10-7cm3/Nm-0.51×10-7cm3/Nm。
Embodiment 3
1. two constituent contents are corn straw modification composite fibre enhancing friction material described in by mass percentage：It is compound
Fiber interweaving structural material 16%, filler layer material 84%；Wherein each component content is filler layer material by mass percentage：
Phenolic resin 13%, aramid fiber particle 6%, flaky graphite 19%, antimonous sulfide 7%, zeolite 5%, barium sulfate 13%, bubble
Foam iron powder 17%, wollastonite 9%, red vermiculite 3%, petroleum coke 8%.
2. composite fibre pilotaxitic texture layer material described in, is made through the following steps：
(1) corn stalk fiber is 1. immersed in the mixed solution of ethyl alcohol and calgon (fiber and mixed solution
Mass ratio be 1:23), each component content is by mass percentage：Absolute ethyl alcohol 38%, calgon 13%, distilled water
49%, processing time 18min；Again wash with distilled water, cleaning temperature is 40 DEG C, scavenging period 4min, wash number 5
It is secondary；Drying and processing, treatment temperature is 73 DEG C, processing time 1.8h, until the moisture content 8% of fiber；2. by corn stalk fiber
Be immersed in the mixed solution of dimethyl sulfoxide (DMSO) and dimethylbenzene (mass ratio of fiber and mixed solution be 1:25), by quality percentage
It is than two constituent contents：Dimethyl sulfoxide (DMSO) 70%, dimethylbenzene 30%, soaking time 33min；3. corn stalk fiber is impregnated
(mass ratio of fiber and mixed solution is 1 in mixed solution:30), each component content is by mass percentage：Hexamethylene
60%, butanol 17%, chloroform 18.5%, niobium pentaoxide (Nb2O5) 2%, ruthenium (Ru) 2.5%, soaking temperature is 45 DEG C, is impregnated
Time is 3.5h；4. corn stalk fiber is immersed in 70wt% ethylene glycol, (mass ratio of fiber and ethylene glycol is 1:21),
Ultrasonic vibration, processing time 13min shake frequency 45kHz, power 600W；Then corn stalk fiber is taken out and uses steaming
Distilled water is cleaned, and is dried, and modified corn stalk fiber is obtained.
(2) 1. aramid fiber is immersed in 70wt% acetone solns to (mass ratio of fiber and acetone soln is 1:24) into
Row is cleaned by ultrasonic, processing time 0.8h, shakes frequency 63kHz, power 620W, then wash with distilled water, drying；2. will
Aramid fiber be immersed in mixed solution (mass ratio of fiber and mixed solution be 1:20), mixed solution is each by mass percentage
Constituent content is：Dichloromethane 21%, magnesium chloride 7%, propyl alcohol 72%；Again wash with distilled water, it and dries；3. by aramid fiber
Be immersed in the mixed solution of coupling agent and alcohol (mass ratio of fiber and mixed solution be 1:34), two component by mass percentage
Content is：Coupling agent vinyl methyl dichlorosilane 3.5%, n-butanol solvent 96.5%, processing time 3h；4. by aramid fiber fibre
Dimension carries out drying and processing, processing time 2.5h, and treatment temperature is 55 DEG C, obtains modification of aramid fiber.
(3) pbo fiber is 1. immersed in the mixed solution of acetone and polyphosphoric acids the (mass ratio of fiber and mixed solution
It is 1:22), two constituent contents are by mass percentage：Acetone 30%, polyphosphoric acids 70%, treatment temperature is 65 DEG C, when processing
Between be 4h；2. pbo fiber is immersed in mixed solution, (mass ratio of fiber and mixed solution is 1:26) it is ultrasonically treated,
Two constituent contents are mixed solution by mass percentage：Ethyl alcohol 43%, formic acid 57%, processing time 30min shake frequency
Then 55kHz, power 450W are cleaned 5 times repeatedly with distilled water, drying；3. pbo fiber is immersed in the mixed of coupling agent and alcohol
(mass ratio of fiber and mixed solution is 1 in conjunction solution:29), two constituent contents are by mass percentage：Coupling agent vinyl
Three (2- methoxyethoxies) silane 3.5%, ethyl alcohol 96.5%；4. pbo fiber is subjected to drying and processing, processing time 3.5h,
Treatment temperature is 58 DEG C, obtains modified pbo fiber.
(4) composite fibre is made of modification of aramid fiber and modified pbo fiber, and two constituent contents are by mass percentage：
Modification of aramid fiber 50%, modified pbo fiber 50%；
(5) 1. 2. 3. with it is described in embodiment 1 identical；4. two groups by mass percentage of composite fibre pilotaxitic texture layer material
Point content is：The thickness in monolayer of corn straw modification fiber 79%, composite fibre 21%, composite fibre pilotaxitic texture layer is
1.1mm。
3. corn straw modification composite fibre enhancing friction material described in is prepared using hot pressing-heat-treating methods, system
Standby process is as follows：
(1) packing layer raw material is put into mixing in batch mixer, batch mixing sequence is wollastonite, red vermiculite, antimonous sulfide, bubble
In foam iron powder, barium sulfate, flaky graphite, petroleum coke input batch mixer, batch mixing 11min, then by aramid fiber particle, zeolite, phenol
Urea formaldehyde is put into batch mixer, batch mixing 16min.
(2) filler layer material obtained and composite fibre pilotaxitic texture layer material are pressed into " packing layer-composite fibre single fisherman's knot
The sequence of structure layer-packing layer " is equably filled in mold successively, and wherein top and bottom end are packing layer, top and bottom end
The thickness in monolayer ratio of packing layer and composite fibre pilotaxitic texture layer is 9:1, remaining packing layer and composite fibre pilotaxitic texture layer
Thickness in monolayer ratio is 5:1, i.e. the overall thickness L of packing layer and composite fibre pilotaxitic texture layer1For 69.3mm, wherein composite fibre is handed over
Knit the thickness in monolayer L of structure sheaf2For 1.1mm, the thickness in monolayer L of top and bottom end packing layer3For 9.9mm, the list of remaining packing layer
Layer thickness L4For 5.5mm.
(3) the composite fibre pilotaxitic texture layer finished will be loaded and filler layer material carries out hot-pressing processing, pressure is
280MPa, hot pressing temperature are 290 DEG C, dwell time 80min, carry out deflating 6 times in pressure maintaining period, each deflation time is
14s, pressing direction are axially vertical with fiber.
(4) obtained compacting product are heat-treated, heating temperature is 145 DEG C, soaking time 65min, heating temperature
It it is 220 DEG C, soaking time 45min, then cooled to room temperature will be vertical with composite fibre pilotaxitic texture layer direction
Face carries out pre-grinding, obtains brake wear face, becomes corn straw modification composite fibre enhancing friction material.
The range of friction coefficients of the friction material produced by above-described embodiment process is 0.372-0.453, abrasion
Rate is 0.23 × 10-7cm3/Nm-0.42×10-7cm3/Nm。
Claims (1)
1. a kind of corn straw modification composite fibre enhances friction material, it is characterised in that：By composite fibre pilotaxitic texture layer (2)
With packing layer (1) form, wherein the material of composite fibre pilotaxitic texture layer (2) be corn straw modification fiber and composite fibre,
Composite fibre is made of modification of aramid fiber and modified polyphenyl and double oxazole fibers；Modified corn in composite fibre pilotaxitic texture layer
Stalk fibre is divided into odd numbers corn straw modification filamentary weft (A), even numbers corn straw modification filamentary weft (B), odd numbers and is modified
Corn stalk fiber warp (C) and even numbers corn straw modification fibre warps (D)；Composite fibre is divided into odd numbers composite fibre line
(E) and even numbers composite fibre line (F)；Odd numbers corn straw modification filamentary weft (A) and even numbers corn straw modification filamentary weft
(B) alternating parallel arranges, and odd numbers corn straw modification fibre warps (C) and even numbers corn straw modification fibre warps (D) are alternately
It is arranged in parallel；Odd numbers corn straw modification fibre warps (C) and even numbers corn straw modification fibre warps (D) alternate in list
Number corn straw modification filamentary weft (A) and even numbers corn straw modification filamentary weft (B), odd numbers corn straw modification fiber warp
Line (C) and even numbers corn straw modification fibre warps (D) and odd numbers corn straw modification filamentary weft (A) and even numbers modified corn
The angle α of stalk fibre weft (B) is 45 °；Odd numbers composite fibre line (E) and the arrangement of even numbers composite fibre line (F) alternating parallel,
And it alternates and changes with odd numbers in odd numbers corn straw modification filamentary weft (A) and even numbers corn straw modification filamentary weft (B)
Property corn stalk fiber warp (C) and even numbers corn straw modification fibre warps (D) binding site, odd numbers composite fibre line (E) and
Even numbers composite fibre line (F) is pressed from both sides with odd numbers corn straw modification filamentary weft (A) and even numbers corn straw modification filamentary weft (B)
Angle beta is 22.5 °；Packing layer (1) and composite fibre pilotaxitic texture layer (2) arrange alternatively up and down, and top and bottom end are packing layer
(1), the overall thickness L of packing layer (1) and composite fibre pilotaxitic texture layer (2)1For 30.6-97.5mm, wherein composite fibre interweaves
The thickness in monolayer L of structure sheaf (2)2For 0.6-1.5mm, the thickness in monolayer L on top and bottom end packing layer (1)3For 6.6-10.5mm,
The thickness in monolayer L of remaining packing layer (1)4For 3.6-6mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721676796.8U CN207891299U (en) | 2017-12-06 | 2017-12-06 | A kind of corn straw modification composite fibre enhancing friction material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721676796.8U CN207891299U (en) | 2017-12-06 | 2017-12-06 | A kind of corn straw modification composite fibre enhancing friction material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116945704A (en) * | 2023-06-17 | 2023-10-27 | 广东美登新材料科技有限公司 | Composite diversion layer with physical diversion and hydrophilic properties |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116945704A (en) * | 2023-06-17 | 2023-10-27 | 广东美登新材料科技有限公司 | Composite diversion layer with physical diversion and hydrophilic properties |
| CN116945704B (en) * | 2023-06-17 | 2024-05-24 | 广东美登新材料科技有限公司 | Composite diversion layer with physical diversion and hydrophilic properties |
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