CN103541266B - A kind of preparation method of the paper friction material based on suction filtration - Google Patents
A kind of preparation method of the paper friction material based on suction filtration Download PDFInfo
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Abstract
Based on a preparation method for the paper friction material of suction filtration, cashew nut oil modified alkyd resin is dissolved in absolute ethyl alcohol and obtains solution A; Multi-walled carbon nano-tubes is dispersed in sodium dodecyl sulfate aqueous solution and obtains suspension B; Chopped carbon fiber, bamboo fibre, diatomite and solution A are dispersed in absolute ethyl alcohol and add suspension B again and obtain C solution; C solution is discongested rear suction filtration again drying obtain print; Take out after print being impregnated in solution A and dry, hot-forming, namely obtain the paper friction material based on suction filtration.The present invention utilizes suction filtration to operate the traditional handsheet machine of replacement to realize the tableting process of friction material, prepare single-part stationery base frication material, technique is simple and easy to control, overcome the deficiency that prior art can only prepare paper friction material in aqueous phase, whole tableting process zero water can be realized participate in, substantially increase the frictional behaviour of paper friction material, effectively reduce wear rate.
Description
Technical field
The invention belongs to friction material field, relate to the preparation method of paper friction material in a kind of oil phase, particularly a kind of preparation method of the paper friction material based on suction filtration.
Background technology
Wet-type friction material refers to work in the friction material in lubricant medium (mainly lubricating oil), be mainly used in [P.Marklund in the actuation in wet oiling condition systems such as automatic transmission, differential mechanism, torque management device and synchronized, R.Larsson.TribologyInternational, 2008,41:824 – 830.].Because service condition is different, the speed of transmission system, pressure and load difference are very large, certain material single is difficult to meet all operating mode instructions for uses, thus develop multiple Wet-type friction material, mainly comprise cork-rubber base frication material, powder metallurgy friction material, paper friction material and carbon/carbon compound material etc.
Along with motor vehicles at a high speed, heavy duty, pollution-free future development, be torsion pass and the braking characteristic of held stationary, the frictional behaviour of friction material, heat resistance and chemical stability etc. had higher requirement.Researchers have made some effort and effect [KimSJ, ChoMH, LimDS, etal.Wear, 2001, (251): 1484 ~ 1491] at paper base material the Nomenclature Composition and Structure of Complexes design aspect.Not that the fast development of material with carbon element in recent years makes it have also been obtained expansion in the application of friction material field, Tsing-Hua University is permitted vertical Ning Dengren at resin content to having done than more comprehensive research [Xu Lining in the affecting of wet clutch carbonaceous friction material frictional behaviour, Deng Haijin, Wang Xinpeng, Li Ming. process materials equipment, 2001 (10): 33-35].Permitted to stand the peaceful people of grade to find in the wet clutch carbonaceous friction material be made up of resinoid bond, Graphite friction agent and other filler, the heat resistance of resin is the poorest, had a strong impact on the friction and wear behavior of friction material, thus the content of resin just becomes the focus of research.Resin content is too high, and friction material heat fading is serious, and coefficient of friction sharply declines; Resin content is too low, and friction material causes coefficient of friction unstable because stick amount is very few, fret wear aggravates.
Paper friction material adopts the mode of papermaking to produce primarily of fiber, binding agent, frictional property regulator, filler etc. in aqueous phase.When suspension made by paper friction material batch mixing prepared by this method, free settling, wadding is poly-, and the combination of various component belongs to physical bond, and interface cohesion is not very even, and ABRASION RESISTANCE is also bad.And a large amount of resin can not enter in friction plate, gives full play to the effect of its bonding agent.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of the paper friction material based on suction filtration, the method technique is simple and easy to control, utilize suction filtration to operate and replace traditional handsheet machine to realize the tableting process of friction material, whole tableting process zero water can be realized participate in, improve the frictional behaviour of paper friction material.
For achieving the above object, the technical solution used in the present invention comprises the following steps:
Step one: be dissolved in by the cashew nut oil modified alkyd resin of every 1.0g ~ 5.0g in the absolute ethyl alcohol of every 50 ~ 150mL, obtain phenol resin solution, leaves standstill, and sealing is preserved, and obtains solution A;
Step 2: be dispersed in by the multi-walled carbon nano-tubes of every 2 ~ 8g in the sodium dodecyl sulfate aqueous solution of every 100 ~ 500mL, is stirred to multi-walled carbon nano-tubes and is uniformly dispersed, and obtains suspension B;
Step 3: the solution A adding the chopped carbon fiber of 6 ~ 14g, the bamboo fibre of 5 ~ 12g, the diatomite of 1 ~ 5g and 20 ~ 80mL in the absolute ethyl alcohol of every 100 ~ 700mL, be uniformly dispersed, obtain mixed solution, again suspension B is joined in mixed solution and obtain C solution, when wherein often adding 20 ~ 80mLA solution, add 80 ~ 500g suspension B;
Step 4: C solution discongested, then carries out suction filtration by the C solution after discongesting, by filtration cakes torrefaction, obtains print;
Step 5: take out after print being impregnated in solution A and dry, then hot-forming, namely obtain the paper friction material based on suction filtration.
Time of repose in described step one is 20h ~ 40h.
In described step 2, the diameter of multi-walled carbon nano-tubes is 30 ~ 50nm.
In described step 2, the mass concentration of sodium dodecyl sulfate aqueous solution is 0.1% ~ 0.5%.
In described step 3, the diameter of chopped carbon fiber is 8 ~ 15 μm.
In described step 3, the beating degree of bamboo fibre is 60 ~ 100 ° of SR.
That discongests in described step 4 disperses 800 ~ 2000r for C solution being poured in fluffer.
Temperature hot-forming in described step 5 is 140 ~ 180 DEG C, and the time is 10 ~ 20min, and pressure is 3 ~ 8MPa.
Vulcanizer is used to carry out hot-forming operation in described step 5.
Relative to prior art, beneficial effect is the invention enables to be:
The invention provides a kind of operation by suction filtration to realize in oil phase, prepare the preparation method that paper friction material effectively improves the paper friction material based on suction filtration of the frictional behaviour of Wet-type friction material.Chopped carbon fiber, bamboo fibre, diatomite and the solution A that obtained by cashew nut oil modified alkyd resin are dispersed in absolute ethyl alcohol, add the suspension B be in control by multi-wall carbon nano-tube again, suction filtration operation is adopted to be prepared into print, print is flooded solution A, rear hot-press solidifying to be dried, is finally prepared into the paper friction material based on suction filtration.And by controlling the content of various component, the paper friction material based on suction filtration of different coefficients of friction and wear rate can be obtained.Present invention process is simple and easy to control, by suction filtration operational applications in Wet-type friction material preparation process, utilize suction filtration to operate and replace traditional handsheet machine to realize the tableting process of friction material, whole tableting process zero water can be realized and participate in, prepare the paper friction material of individual layer.One aspect of the present invention overcomes the deficiency can only preparing paper friction material in prior art in aqueous phase, traditional handsheet technique batch mixing can be overcome when making suspension simultaneously, free settling, wadding are poly-, the combination of various component belongs to physical bond, interface cohesion is uneven, ABRASION RESISTANCE is bad, and a large amount of resin can not enter in friction plate and give full play to the problems such as its bonding agent effect.Greatly can improve the frictional behaviour of paper friction material on the other hand, effective reduction wear rate, when adopting method of the present invention to prepare paper friction material, C solution not free settling and wadding is gathered, a large amount of resin can enter in paper friction material and give full play to its bonding agent effect, therefore in the paper friction material prepared, the combination of various component is not simple physical bond, its interface cohesion is good, friction noise is little, wear rate is low, stable friction performance, ABRASION RESISTANCE is good, the Wet-type paper friction material based on suction filtration that coefficient of friction is high, 0.15 can be brought up to by 0.12 by the coefficient of kinetic friction measured by QM1000-II type tester for friction between, wear rate can by 5.0 × 10
-8drop to 2.5 × 10
-8, there are good large-scale industrial production potentiality.
Accompanying drawing explanation
Fig. 1 is the surface scan electron microscopic picture of the paper friction material based on suction filtration that embodiment 3 is prepared.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail.
The cashew nut oil modified alkyd resin used in the present invention is from Shandong Shengquan Chemical Industry Co., Ltd., and model is PF-6291A; Multi-walled carbon nano-tubes is from Tsing-Hua University's chemical industry system reaction engineering laboratory; Chopped carbon fiber is from Anshan Sinocrab Carbon Fiber Co., Ltd..
Embodiment 1:
Step one: get 1.0g cashew nut oil modified alkyd resin, is dissolved in 60mL absolute ethyl alcohol, obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 20h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 100mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.1%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 4 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 3g diameter;
Step 3: to add 8g diameter in 100mL absolute ethyl alcohol be chopped carbon fiber, the 7g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 60 ° of SR, 1g diatomite and 40mL, be uniformly dispersed, mixed solution, then get 100g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 1000r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 10min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 140 DEG C, and hot pressing time is 10min, hot pressing pressure is 4MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
Embodiment 2:
Step one: get 2g cashew nut oil modified alkyd resin, is dissolved in 70mL absolute ethyl alcohol and obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 25h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 200mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.2%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 5 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 4g diameter;
Step 3: to add 9g diameter in 200mL absolute ethyl alcohol be chopped carbon fiber, the 8g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 70 ° of SR, 2g diatomite and 50mL, be uniformly dispersed, mixed solution, then get 200g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 1200r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 15min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 150 DEG C, and hot pressing time is 12min, hot pressing pressure is 5MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
Embodiment 3:
Step one: get 3g cashew nut oil modified alkyd resin, is dissolved in 80mL absolute ethyl alcohol and obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 30h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 300mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.3%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 5.5 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 5g diameter;
Step 3: to add 10g diameter in 300mL absolute ethyl alcohol be chopped carbon fiber, the 9g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 80 ° of SR, 3g diatomite and 60mL, be uniformly dispersed, mixed solution, then get 300g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 1400r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 20min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 160 DEG C, and hot pressing time is 14min, hot pressing pressure is 6MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
Fig. 1 is the surface scan electron microscopic picture of the paper friction material based on suction filtration that the present embodiment is prepared.As can see from Figure 1, there is a large amount of cashew nut oil modified alkyd resin to be present in the prepared friction material based on suction filtration inner, fully each component is sticked together firmly, make interface cohesion tight.
Embodiment 4:
Step one: get 4g cashew nut oil modified alkyd resin, is dissolved in 90mL absolute ethyl alcohol and obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 35h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 400mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.4%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 6 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 6g diameter;
Step 3: to add 11g diameter in 400mL absolute ethyl alcohol be chopped carbon fiber, the 10g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 90 ° of SR, 4g diatomite and 70mL, be uniformly dispersed, mixed solution, then get 400g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 1600r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 25min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 170 DEG C, and hot pressing time is 16min, hot pressing pressure is 7MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
Embodiment 5:
Step one: get 5g cashew nut oil modified alkyd resin, is dissolved in 100mL absolute ethyl alcohol and obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 40h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 500mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.5%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 5 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 7g diameter;
Step 3: to add 12g diameter in 500mL absolute ethyl alcohol be chopped carbon fiber, the 11g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 100 ° of SR, 5g diatomite and 80mL, be uniformly dispersed, mixed solution, then get 500g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 1800r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 30min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 180 DEG C, and hot pressing time is 18min, hot pressing pressure is 8MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
Embodiment 6:
Step one: get 2.5g cashew nut oil modified alkyd resin, is dissolved in 150mL absolute ethyl alcohol and obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 22h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 150mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.15%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 6 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 2g diameter;
Step 3: to add 14g diameter in 600mL absolute ethyl alcohol be chopped carbon fiber, the 5g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 75 ° of SR, 2.5g diatomite and 20mL, be uniformly dispersed, mixed solution, then get 80g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 800r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 25min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 155 DEG C, and hot pressing time is 20min, hot pressing pressure is 3MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
Embodiment 7:
Step one: get 4.5g cashew nut oil modified alkyd resin, is dissolved in 50mL absolute ethyl alcohol and obtains phenol resin solution, after phenolic resins fully dissolves, leave standstill 32h, and sealing is preserved, and obtains solution A;
Step 2: be that to be dispersed in 350mL mass concentration be that in dodecyl sodium sulfate (SDS) aqueous solution of 0.25%, magnetic agitation is uniformly dispersed to multi-walled carbon nano-tubes for 5 hours, obtains suspension B for the multi-walled carbon nano-tubes of 30 ~ 50nm by 8g diameter;
Step 3: to add 6g diameter in 700mL absolute ethyl alcohol be chopped carbon fiber, the 12g beating degree of 8 ~ 15 μm is the solution A of the bamboo fibre of 85 ° of SR, 3.5g diatomite and 45mL, be uniformly dispersed, mixed solution, then get 250g suspension B and to pour in mixed solution to obtain C solution into;
Step 4: C solution is poured in fluffer and disperses 2000r, take out the C solution after discongesting, funnel, bottle,suction, water circulating pump three are tightly connected, filter paper is adjacent to funnel bottom, open water pump, again the batching discongested is poured in funnel and carry out suction filtration, after suction filtration terminates, filter cake is carried out drying, obtain print;
Step 5: print be impregnated in solution A and take out nature after 30min and dry, hot-forming on vulcanizer, the hot pressing temperature controlling vulcanizer is 175 DEG C, and hot pressing time is 15min, hot pressing pressure is 6.5MPa, namely obtains the paper friction material based on suction filtration of stable friction performance.
The Wet-type paper friction material interface cohesion based on suction filtration that the present invention prepares is good, friction noise is little, wear rate is low, stable friction performance, coefficient of friction are high, can bring up to 0.15 by 0.12 by the coefficient of kinetic friction measured by QM1000-II type tester for friction between, wear rate can by 5.0 × 10
-8drop to 2.5 × 10
-8.
Claims (5)
1. based on a preparation method for the paper friction material of suction filtration, it is characterized in that: comprise the following steps:
Step one: be dissolved in by the cashew nut oil modified alkyd resin of every 1.0g ~ 5.0g in the absolute ethyl alcohol of every 50 ~ 150mL, obtain phenol resin solution, leaves standstill 20h ~ 40h, and sealing is preserved, and obtains solution A;
Step 2: the multi-walled carbon nano-tubes being 30 ~ 50nm by every 2 ~ 8g diameter is dispersed in the sodium dodecyl sulfate aqueous solution of every 100 ~ 500mL, is stirred to multi-walled carbon nano-tubes and is uniformly dispersed, and obtains suspension B;
Step 3: add the chopped carbon fiber of 6 ~ 14g in the absolute ethyl alcohol of every 100 ~ 700mL, solution A that 5 ~ 12g beating degree is the bamboo fibre of 60 ~ 100 ° of SR, the diatomite of 1 ~ 5g and 20 ~ 80mL, be uniformly dispersed, obtain mixed solution, again suspension B is joined in mixed solution and obtain C solution, when wherein often adding 20 ~ 80mLA solution, add 80 ~ 500g suspension B;
Step 4: C solution discongested, then carries out suction filtration by the C solution after discongesting, by filtration cakes torrefaction, obtains print;
Step 5: take out after print being impregnated in solution A and dry, then hot-forming, namely obtain the paper friction material based on suction filtration, wherein hot-forming temperature is 140 ~ 180 DEG C, and the time is 10 ~ 20min, and pressure is 3 ~ 8MPa.
2. the preparation method of the paper friction material based on suction filtration according to claim 1, is characterized in that: in described step 2, the mass concentration of sodium dodecyl sulfate aqueous solution is 0.1% ~ 0.5%.
3. the preparation method of the paper friction material based on suction filtration according to claim 1, is characterized in that: in described step 3, the diameter of chopped carbon fiber is 8 ~ 15 μm.
4. the preparation method of the paper friction material based on suction filtration according to claim 1, is characterized in that: discongest in described step 4 and disperse 800 ~ 2000r for C solution being poured in fluffer.
5. the preparation method of the paper friction material based on suction filtration according to claim 1, is characterized in that: use vulcanizer to carry out hot-forming operation in described step 5.
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| CN105297239A (en) * | 2015-09-17 | 2016-02-03 | 无锡市长安曙光手套厂 | Fragrance-releasing fabric and preparation method for same |
| CN105348729B (en) * | 2015-10-30 | 2017-07-14 | 陕西科技大学 | A kind of organic fiber strengthens the preparation method of carbon cloth/resin composite materials |
| CN107310001B (en) * | 2017-06-28 | 2019-05-24 | 深圳市美术装饰工程有限公司 | A kind of bamboo slab rubber and preparation method thereof |
| CN110725153A (en) * | 2019-11-15 | 2020-01-24 | 杭州萧山红旗摩擦材料有限公司 | Paper-based friction material papermaking pulping preparation method |
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| US5989390A (en) * | 1999-01-06 | 1999-11-23 | Knowlton Specialty Papers, Inc. | Friction paper containing activated carbon |
| CN102019695A (en) * | 2010-10-26 | 2011-04-20 | 陕西科技大学 | Preparation method of chopped carbon fiber reinforced phenolic resin base composite material |
| CN102943410A (en) * | 2012-11-14 | 2013-02-27 | 陕西科技大学 | Method for preparing MWNT (Multi-Walled Carbon Nanotube) modified paper-based friction material |
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| US5989390A (en) * | 1999-01-06 | 1999-11-23 | Knowlton Specialty Papers, Inc. | Friction paper containing activated carbon |
| CN102019695A (en) * | 2010-10-26 | 2011-04-20 | 陕西科技大学 | Preparation method of chopped carbon fiber reinforced phenolic resin base composite material |
| CN102943410A (en) * | 2012-11-14 | 2013-02-27 | 陕西科技大学 | Method for preparing MWNT (Multi-Walled Carbon Nanotube) modified paper-based friction material |
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Effective date of registration: 20201214 Address after: No.105 Wengang South Road, Xinhe street, Yandu District, Yancheng City, Jiangsu Province (CNx) Patentee after: Yancheng hi tech Pioneer Park Co.,Ltd. Address before: No. 1, Weiyang District university garden, Xi'an, Shaanxi Province, Shaanxi Patentee before: SHAANXI University OF SCIENCE & TECHNOLOGY |