CN105801840A - Nanoparticle reinforced self-lubricated cast nylon composite shaft sleeve and manufacturing method thereof - Google Patents
Nanoparticle reinforced self-lubricated cast nylon composite shaft sleeve and manufacturing method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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Abstract
A nanoparticle reinforced self-lubricated cast nylon composite shaft sleeve is prepared from components including a caprolactam monomer, sodium hydroxide, triphenylmethane triisocyanate, nano graphite fluoride and mica powder in a weight ratio being 100:(0.15-0.45):(0.3-0.6):(0.4-0.5):(2.0-4.0). The manufacturing method of the composite shaft sleeve comprises preparation of reaction melts, preparation of a dispersion liquid as well as molding and demolding, the centrifugal casting method is adopted in the casting process, so that more nano graphite fluoride and mica powder are centralized and distributed on the outer surface of the shaft sleeve, the shaft sleeve has better bearing capacity and more excellent anti-friction and wear-resistance properties, the wear of the shaft sleeve is reduced, and the service life of the shaft sleeve is prolonged.
Description
Technical field
The invention belongs to cast composite nylon material technical field, particularly relate to a kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve and manufacture method thereof.
Background technology
Friction and wear consumes the 30% ~ 40% of the consumed worldwide energy, rubs as the natural phenomena in a kind of object of which movement process, is the old problem faced in human knowledge's nature and nature remodeling process.For this, the research for antifriction, high-abrasive material is necessary and is a kind of inevitable developing direction.
Monomer cast nylon (MC) is to be formed by caprolactam monomer ring-opening polymerisation, and polyreaction and product molding are all carry out in a mould.The little light weight of monomer cast nylon proportion, its density is 1.15 ~ 1.16g/cm3, having that chemical stability is good, electrical insulating property is good, the feature that coefficient of friction is little, wearability, self-lubricating property are good, linear expansion coefficient is 9 × 10-5/ k, the feature of good stability of the dimension.Monomer cast nylon is shock-resistant, not easily seize, clinkering, do not hinder axle journal；Strong adaptability under lubrication interval length, minimizing maintenance, adverse circumstances, the life-span is long.MC is widely used for manufacturing anti-friction wear-resistant part, is particularly well-suited to manufacture injection mo(u)lding and compressing insurmountable massive article.The various metals materials such as copper, aluminum, iron and steel are progressively substituted in a lot of fields.It is relatively low that general MC nylon also exists strength modulus in actual applications, and toughness is poor, and wearability is not good enough, and the operating temperature of anti-friction wear-resistant monomer cast nylon is lower than 80.Along with MC nylon in mine, metallurgy, aviation, automobile, the extensive use of the industry such as electric and various apparatus be to the development in the directions such as maximization, high performance, high-speed overload, the toughness of MC nylon, rigidity, friction and abrasion etc. are proposed requirements at the higher level, MC nylon just develops towards high-performance, multi-functional direction, do not require nothing more than the unification of mechanical performance and self-lubricating property, but also require to realize self-lubricating property in wider temperature range, therefore by the complex technique of material, exploitation modified cast mylon composite is particularly important.
At present, a lot of scholars have done the research work of substantial amounts of modified cast mylon.Such as Chinese invention patent CN102532524A discloses a kind of nylon chopped fiber/cast nylon composite material and manufacture method thereof, this material is greatly improved than the shock resistance on monomer cast nylon original base, improves the strength of materials by a small margin simultaneously.Chinese invention patent CN102942694A discloses the cast composite nylon material of a kind of oil-containing, reduces the coefficient of friction of monomer cast nylon, improves the wear resistance of material, but the intensity of material is not significantly improved.As Chinese invention patent CN101121787B discloses a kind of cast composite nylon material adding reinforcing agent nano rare earth, modifying agent lauric lactam, its toughness and wearability height, and water absorption rate is low, barasion coefficient is little.Chinese invention patent CN100526383C discloses and a kind of adds the modifying agent polyurethane preparation method for cast composite nylon material, impact strength increases with the increase of base polyurethane prepolymer for use as consumption, tribological property and antistatic property have had and have been obviously improved, but its intensity is gradually lowered.
Graphene (graphene) i.e. mono-layer graphite, the bidimensional lattice structure being made up of carbon hexatomic ring, do not only have excellent electric property, light weight, heat conductivity is good, and specific surface area is big, and its Young's modulus (lTPa) and intrinsic strength (130GPa) are very high, it is suitable as the composite of filler excellent, has become as study hotspot in recent years.Chinese invention patent CN101928457A discloses the cast composite nylon material of a kind of Graphene adding about 0.1-5%, gained cast composite nylon material mechanical performance compared with the monomer cast nylon material not adding Graphene improves 5-20%, but its shock resistance and frictional behaviour are poor.Chinese invention patent CN201110286247.0 discloses a kind of cast composite nylon material adding 0.005-0.095% Graphene, the shock resistance of composite and anti-wear performance and improves.But at present owing to graphene preparation technology and technique are still immature, the price of Graphene, and quality is unstable, the performance of composite improves limited.
Fluorographite is carbon and fluorine at high temperature reacts the charcoal-graphite functional material of a kind of advanced person of generation, the structure of fluorographite is staggered layer structure, distance between its face doubles the carbon of graphite and the spacing distance of carbon, has than the better lubricity of graphite and chemical stability.Muscovitum has the features such as high temperature resistant, wear-resisting, and Muscovitum can strengthen the rigidity of nylon, thermostability, reduces molding shrinkage.Adopting Nanometer Graphite Fluoride Used and mica powder is lubricant and reinforcing agent and monomer cast nylon compound, is possible not only to obtain the high-strength composite material with excellent antifriction antiwear, and manufacturing cost is well below Graphene/cast composite nylon material.
Summary of the invention
It is an object of the invention to provide a kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve and manufacture method thereof, the basis of original monomer cast nylon is improved its intensity, heat resisting temperature and self-lubricating property, and utilize spun casting processing suitable in the high-strength anti-friction wear-resistant axle sleeve of long-term work under heavy duty, speed operation.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, constituting the component of this composite shaft sleeve, to include ratio of weight and number be the caprolactam monomer of 100:0.15 ~ 0.45:0.3 ~ 0.6:0.4 ~ 0.5:2.0 ~ 4.0, sodium hydroxide, triphenylmethane triisocyanate, nanometer fluorographite and mica powder, and wherein the density of nanometer fluorographite is 2.5-2.6g/cm3, mica powder density is 2.7-3.2g/cm3。
A kind of method manufacturing above-mentioned nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, comprises the steps:
(1) heating the caprolactam monomer of parts by weight 100 parts to 130 DEG C of fusings, evacuation dehydration 20min, be then added thereto to the sodium hydroxide of parts by weight 0.15 ~ 0.45 part, evacuation dehydration 10min, obtains reaction melt again；
(2) parts by weight processed through the surface coupling agent respectively nanometer fluorographite of 0.4 ~ 0.5 and the mica powder of 2.0 ~ 4.0 parts are added in the reaction melt of step (1) gained, with the speed of 700rpm to after its continuously stirred 5-10min, disperse 15～20min with ultrasound wave, obtain dispersion liquid；
(3) shaft sleeve die is arranged on the board of horizontal centrifuge, starts horizontal centrifuge and rotate with the speed of 500 ~ 600r/min, and preheat shaft sleeve die to 160-180 DEG C；
(4) dispersion liquid of step (2) gained is added in reaction bulb, and the triphenylmethane triisocyanate of parts by weight 0.3 ~ 0.6 part is added to reaction bulb, mix homogeneously also heats after 180 DEG C, it is cast in shaft sleeve die that is preheated in step (3) and that rotate, heating is stopped after keeping the temperature 20-30min of shaft sleeve die 160-180 DEG C, and continue to keep rotating 3-5min, when temperature is down to 140～150 DEG C, get final product the demoulding；
(5) composite shaft sleeve after the demoulding is put in the couveuse of 110-120 DEG C and cool to less than 50 DEG C with the furnace, further take out air cooling and can obtain finished product to room temperature.
Further, the granularity of described nanometer of fluorographite is less than 80nm, and the granularity of mica powder is less than 5um.
Compared with prior art, the invention has the beneficial effects as follows:
First, utilize the moulded nylon with self-tubricating composite shaft sleeve prepared by the present invention, there is intensity height, self lubricity that heat resistance is good and excellent, the high-strength anti-friction wear-resistant workpiece being suitable under heavy duty, speed operation long-term work, and axle sleeve in the course of the work can be good heat radiation, this also decreases the abrasion of axle sleeve to a certain extent, increases the service life of axle sleeve；
Second, the fluorographite that the present invention adopts is high degree of fluorination nano-graphite, and its density is 2.5-2.6g/cm3, Muscovitum density is 2.7-3.2g/cm3, both density are all much larger than the density of nylon.Owing to, in centrifugal casting process, density ratio liquid master--the out-phase particle that body density is big can move to liquid outer surface.Therefore pass through the content of fluorographite and Muscovitum in the axle sleeve that spun casting is machined radially to gradually rise from inside to outside along axle sleeve, namely the graphite of sleeve outer surface and the content of Muscovitum are of a relatively high, the outer surface making axle sleeve has better bearing capacity and more excellent properties of antifriction and wear resistance, the range of application making axle sleeve expands, and service life extends.
3rd, the chemical property of fluorographite is more stable, can the corrosion of acidproof, alkaline-resisting and organic solvent-resistant, coefficient of friction is little, has lubricity；Muscovitum has the features such as high temperature resistant, wear-resisting, the rigidity of nylon, thermostability can be strengthened, reduce molding shrinkage, therefore, utilizing the bearing capacity of the moulded nylon with self-tubricating composite shaft sleeve manufactured by the present invention to improve, the surface temperature of axle sleeve reduces, anti-attrition anti-wear performance is higher, and there is better thermal shock resistance and heat conductivity, axle sleeve can be dispelled the heat better in the process of work, and then reduce the abrasion to axle sleeve further, increase its service life.
Detailed description of the invention
Below by specific embodiment, the present invention is further illustrated.
Embodiment 1: a kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, the component constituting this composite shaft sleeve includes caprolactam monomer, sodium hydroxide, triphenylmethane triisocyanate, nanometer fluorographite and mica powder, its ratio of weight and number is 100:0.15:0.3:0.4:2.0, the density 2.5g/cm of nanometer fluorographite wherein used3, granularity is less than 80nm, and mica powder density is 2.7g/cm3, the granularity of mica powder is less than 5um；
A kind of method manufacturing above-mentioned nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, comprises the steps:
(1) heating the caprolactam monomer of parts by weight 100 parts to 130 DEG C of fusings, evacuation dehydration 20min, be then added thereto to the sodium hydroxide of parts by weight 0.15 part, evacuation dehydration 10min, obtains reaction melt again；
(2) parts by weight processed through the surface coupling agent respectively nanometer fluorographite of 0.4 and the mica powder of 2.0 parts are added in the reaction melt of step (1) gained, with the speed of 700rpm to after its continuously stirred 5min, 15min is disperseed with ultrasound wave, obtaining dispersion liquid, surface coupling agent wherein used is titanate coupling agent；
(3) shaft sleeve die is arranged on the board of horizontal centrifuge, start horizontal centrifuge to rotate with the speed of 500r/min, and shaft sleeve die is preheated to 160 DEG C, the dispersion liquid of step (2) gained is added in reaction bulb, and the triphenylmethane triisocyanate of parts by weight 0.3 part is added to reaction bulb, mix homogeneously also heats after 180 DEG C, it is cast in the rotary sleeve mould being pre-heated to 160 DEG C, after keeping the temperature 20min of shaft sleeve die 160 DEG C, stop heating, and continue to rotate 3min, the demoulding is got final product when temperature is down to 140 DEG C, and the nylon material after the demoulding is put in the couveuse of 110 DEG C and cool to less than 50 DEG C with the furnace, further take out air cooling to room temperature and obtain nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve finished product.
Embodiment 2: a kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, the component constituting this composite shaft sleeve includes caprolactam monomer, sodium hydroxide, triphenylmethane triisocyanate, nanometer fluorographite and mica powder, its ratio of weight and number is 100:0.45:0.6:0.5:4.0, the density 2.6g/cm of nanometer fluorographite wherein used3, granularity is less than 80nm, and mica powder density is 3.2g/cm3, the granularity of mica powder is less than 5um；
A kind of method manufacturing above-mentioned nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, comprises the steps:
(1) heating the caprolactam monomer of parts by weight 100 parts to 130 DEG C of fusings, evacuation dehydration 20min, be then added thereto to the sodium hydroxide of parts by weight 0.45 part, evacuation dehydration 10min, obtains reaction melt again；
(2) parts by weight processed through the surface coupling agent respectively nanometer fluorographite of 0.5 and the mica powder of 4.0 parts are added in the reaction melt of step (1) gained, with the speed of 700rpm to after its continuously stirred 5min, 15min is disperseed with ultrasound wave, obtaining dispersion liquid, surface coupling agent wherein used is titanate coupling agent；
(3) shaft sleeve die is arranged on the board of horizontal centrifuge, start horizontal centrifuge to rotate with the speed of 600r/min, and shaft sleeve die is preheated to 180 DEG C, the dispersion liquid of step (2) gained is added in reaction bulb, and the triphenylmethane triisocyanate of parts by weight 0.3 part is added to reaction bulb, mix homogeneously also heats after 180 DEG C, it is cast in the rotary sleeve mould being pre-heated to 180 DEG C, after insulation 30min, stop heating, and continue to rotate 5min, the demoulding is got final product when temperature is down to 150 DEG C, and the nylon material after the demoulding is put in the couveuse of 120 DEG C and cool to less than 50 DEG C with the furnace, further take out air cooling to room temperature and obtain nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve finished product.
Embodiment 3: a kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, the component constituting this composite shaft sleeve includes caprolactam monomer, sodium hydroxide, triphenylmethane triisocyanate, nanometer fluorographite and mica powder, its ratio of weight and number is 100:0.3:0.45:0.45:3.0, the density 2.6g/cm of nanometer fluorographite wherein used3, granularity is less than 80nm, and mica powder density is 3.0g/cm3, the granularity of mica powder is less than 5um；
A kind of method manufacturing above-mentioned nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, comprises the steps:
(1) heating the caprolactam monomer of parts by weight 100 parts to 130 DEG C of fusings, evacuation dehydration 20min, be then added thereto to the sodium hydroxide of parts by weight 0.3 part, evacuation dehydration 10min, obtains reaction melt again；
(2) parts by weight processed through the surface coupling agent respectively nanometer fluorographite of 0.45 and the mica powder of 3.0 parts are added in the reaction melt of step (1) gained, with the speed of 700rpm to after its continuously stirred 5min, 15min is disperseed with ultrasound wave, obtaining dispersion liquid, surface coupling agent wherein used is titanate coupling agent；
(3) shaft sleeve die is arranged on the board of horizontal centrifuge, start horizontal centrifuge to rotate with the speed of 550r/min, and shaft sleeve die is preheated to 170 DEG C, the dispersion liquid of step (2) gained is added in reaction bulb, and the triphenylmethane triisocyanate of parts by weight 0.3 part is added to reaction bulb, mix homogeneously also heats after 180 DEG C, it is cast in the rotary sleeve mould being pre-heated to 170 DEG C, after insulation 25min, stop heating, and continue to rotate 4min, the demoulding is got final product when temperature is down to 145 DEG C, and the nylon material after the demoulding is put in the couveuse of 115 DEG C and cool to less than 50 DEG C with the furnace, further take out air cooling to room temperature and obtain nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve finished product.
Claims (3)
1. a nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve, it is characterized in that: constituting the component of this composite shaft sleeve, to include ratio of weight and number be the caprolactam monomer of 100:0.15 ~ 0.45:0.3 ~ 0.6:0.4 ~ 0.5:2.0 ~ 4.0, sodium hydroxide, triphenylmethane triisocyanate, nanometer fluorographite and mica powder, and wherein the density of nanometer fluorographite is 2.5-2.6g/cm3, mica powder density is 2.7-3.2g/cm3。
2. the method for the nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve described in a manufacturing claims 1, it is characterised in that: comprise the steps:
(1) heating the caprolactam monomer of parts by weight 100 parts to 130 DEG C of fusings, evacuation dehydration 20min, be then added thereto to the sodium hydroxide of parts by weight 0.15 ~ 0.45 part, evacuation dehydration 10min, obtains reaction melt again；
(2) parts by weight processed through the surface coupling agent respectively nanometer fluorographite of 0.4 ~ 0.5 and the mica powder of 2.0 ~ 4.0 parts are added in the reaction melt of step (1) gained, with the speed of 700rpm to after its continuously stirred 5-10min, disperse 15～20min with ultrasound wave, obtain dispersion liquid；
(3) shaft sleeve die is arranged on the board of horizontal centrifuge, starts horizontal centrifuge and rotate with the speed of 500 ~ 600r/min, and preheat shaft sleeve die to 160-180 DEG C；
(4) dispersion liquid of step (2) gained is added in reaction bulb, and the triphenylmethane triisocyanate of parts by weight 0.3 ~ 0.6 part is added to reaction bulb, mix homogeneously also heats after 180 DEG C, it is cast in rotary sleeve mould preheated in step (3), heating is stopped after keeping the temperature 20-30min of shaft sleeve die 160-180 DEG C, and continue to keep rotating 3-5min, when temperature is down to 140～150 DEG C, get final product the demoulding；
(5) composite shaft sleeve after the demoulding is put in the couveuse of 110-120 DEG C and cool to less than 50 DEG C with the furnace, further take out air cooling and can obtain finished product to room temperature.
3. the method preparing self lubricity cast composite nylon material according to claim 2, it is characterised in that: the granularity of described nanometer fluorographite is less than 80nm, and the granularity of mica powder is less than 5um.
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| CN201610213789.8A CN105801840B (en) | 2016-04-08 | 2016-04-08 | A kind of nano-particle reinforcement moulded nylon with self-tubricating composite shaft sleeve and its manufacture method |
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Cited By (3)
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| CN107474243A (en) * | 2017-08-23 | 2017-12-15 | 江苏易元新材料科技有限公司 | Monomer moulding casting nylon, nylon wheel, the preparation method and application of nylon wheel |
| CN109441952A (en) * | 2018-12-25 | 2019-03-08 | 浙江双金机械集团股份有限公司 | The processing method of crusher axle sleeve |
| CN115637043A (en) * | 2022-10-28 | 2023-01-24 | 江苏宏盛尼龙有限公司 | High-strength super-wear-resistant MC nylon composite material and preparation method thereof |
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Cited By (4)
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| CN107474243A (en) * | 2017-08-23 | 2017-12-15 | 江苏易元新材料科技有限公司 | Monomer moulding casting nylon, nylon wheel, the preparation method and application of nylon wheel |
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| CN115637043A (en) * | 2022-10-28 | 2023-01-24 | 江苏宏盛尼龙有限公司 | High-strength super-wear-resistant MC nylon composite material and preparation method thereof |
| CN115637043B (en) * | 2022-10-28 | 2023-10-27 | 江苏宏盛尼龙有限公司 | High-strength super-wear-resistant MC nylon composite material and preparation method thereof |
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| CN105801840B (en) | 2018-03-27 |
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