CN101974203A - Polytetrafluoroethylene nano particle modified phenolic resin wear-resistant material and preparation method thereof - Google Patents
Polytetrafluoroethylene nano particle modified phenolic resin wear-resistant material and preparation method thereof Download PDFInfo
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Abstract
本发明属于聚合物复合材料技术领域，具体涉及一种聚四氟乙烯纳米粒子改性酚醛树脂耐磨材料及其制备方法。该复合材料的原料配方组成为：酚醛树脂93～99.9wt%，聚四氟乙烯纳米粒子0.1～7wt%，其中酚醛树脂为由前驱物酚类化合物和醛类化合物在碱催化剂作用下反应聚合而获得的热固性酚醛树脂。制备方法为原位聚合并模压成型。本发明在添加少量纳米级聚四氟乙烯的情况下就能明显提高复合材料的耐磨性和降低材料的摩擦系数，而且得到的复合材料中，纳米聚四氟乙烯分散均匀，不易发生团聚，能提高复合材料的力学性能。该发明材料适用于航空、航天、机械、电子、汽车、家电、办公等领域中的超小型高性能自润滑耐磨部件上。
The invention belongs to the technical field of polymer composite materials, and in particular relates to a polytetrafluoroethylene nano-particle modified phenolic resin wear-resistant material and a preparation method thereof. The raw material formula of the composite material is composed of: 93-99.9wt% phenolic resin, 0.1-7wt% polytetrafluoroethylene nanoparticles, wherein the phenolic resin is formed by reacting and polymerizing the precursor phenolic compound and aldehyde compound under the action of an alkali catalyst. Obtained thermosetting phenolic resin. The preparation method is in-situ polymerization and molding. The present invention can significantly improve the wear resistance of the composite material and reduce the friction coefficient of the material when adding a small amount of nano-sized polytetrafluoroethylene, and in the obtained composite material, the nano-polytetrafluoroethylene is evenly dispersed and is not easy to agglomerate, It can improve the mechanical properties of composite materials. The inventive material is suitable for ultra-small high-performance self-lubricating and wear-resistant parts in the fields of aviation, aerospace, machinery, electronics, automobiles, home appliances, and offices.
Description
Technical field
The invention belongs to the polymer nanocomposites technical field, be specifically related to particle modified resol high-abrasive material of a kind of polytetrafluorethylenano nano and preparation method thereof.
Background technology
Resol (PF) is traditional friction material matrix resin, is widely used in aircraft and fields such as aviation field, military equipment field, automobile and transport trade, construction industry because of it has good temperature tolerance, chemical resistance, favorable mechanical performance and processing technology.But along with the expansion of Application Areas with to improving constantly that product performance require, traditional resol can not adapt to the requirement of continuous development fully, must further improve the wear resistance of resol on the basis of original excellent properties, this just need carry out modification to resol.
Along with the develop rapidly of nanosecond science and technology, the research of nanometer particle-modified high molecular abrasion-proof material is the focus of present material tribological field research.Nanoparticle is because size of particles is little, surfactivity is big, and a small amount of interpolation the (conventional approximately particle consumption 1/10th) can be improved the friction and wear behavior of macromolecular material.In friction process, nanoparticle can embed on the one hand unfairness place to flour milling, makes flour milling is easy to generate smooth transfer film, and constantly polishes metallic surface to mill, reduces the planing wearing and tearing to body material; Under the effect of load, nanoparticle is pressed in the body material easily, difficult drop-off on the other hand, thereby the possibility of minimizing abrasive wear, the upper layer nanoparticle has been born most of load simultaneously, has alleviated the suffered frictional stress of regional area, alleviates wearing and tearing effectively.But because the chemical structure and the physical condition of nanoparticle and polymkeric substance differ very big, nanoparticle is very easily reunited owing to having bigger specific surface area and higher surface energy, so the homodisperse nano composite material of the nano level that is difficult to realize ideal.
Summary of the invention
The objective of the invention is to provides a kind of particle modified resol high-abrasive material of polytetrafluorethylenano nano with good dispersion and preparation method thereof at the deficiencies in the prior art, solve the scattering problem of nanoparticle in phenolic resin as matrix resin, realize compound on this composite material nanometer yardstick, thereby make it to have mechanics and friction and wear behavior preferably.
For achieving the above object, the present invention obtains the particle modified phenolic resin composite of polytetrafluorethylenano nano with better dispersiveness by the method for in-situ polymerization.The polytetrafluorethylenano nano particle has improved the mechanical property and the friction and wear behavior of material, thereby has widened the use range of resol.
The particle modified phenolic resin composite of polytetrafluorethylenano nano provided by the invention, the method for being passed through in-situ polymerization by resol and polytetrafluorethylenano nano particle obtains, and the weight percent of each component is:
Resol 93～99.9wt%
Polytetrafluorethylenano nano particle 0.1～7wt%
Among the present invention, described resol is for by precursor phenolic compound and the aldehyde compound heat-reactive phenolic resin that reactive polymeric obtains under the alkaline catalysts effect.
Among the present invention, described phenolic compound can be selected from phenol, dihydroxyphenyl propane.
Among the present invention, described aldehyde compound can be selected from formaldehyde, furfural.
Among the present invention, described catalyzer can be selected from basic catalysts such as ammoniacal liquor, hydrated barta, yellow soda ash, sodium hydroxide.
Among the present invention, described polytetrafluorethylenano nano particle is grafting and grafted polytetrafluorethylenano nano particle not, preferred radiation grafting the polytetrafluorethylenano nano particle of methacrylic acid.Nano-particles size is 20～80nm.
The preparation method of the particle modified resol of polytetrafluorethylenano nano that the present invention proposes is as follows:
(1) takes by weighing an amount of phenolic compound, stir and be heated to reflux state; 2～5wt% by phenols and aldehyde compound pure substance total amount takes by weighing catalyzer, joins in the above-mentioned phenolic compound solution; In the m(phenolic compound): the n(aldehyde compound)=ratio of 1:1.1～1.5 takes by weighing an amount of aldehyde compound, and add in the above-mentioned solution, make temperature of reaction remain on 75～95 ℃, after 60～90min is carried out in reaction, the polytetrafluorethylenano nano particle of matrix material total amount 0.1～7wt% is joined in the above-mentioned solution, continue to stir, until having observed the obvious layering of water;
(2) under 0.4～0.8Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 50～70 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of the above-mentioned pulverous polytetrafluorethylenano nano for preparing adopts the compression molding method moulding, concrete steps are as follows: powder is placed in the mould, under the pressure condition of 8～10MPa, be warming up to 100～120 ℃, again pressure is added to 20～25MPa, constant temperature pressurize 12～18min; Continue to be warming up to 160～180 ℃, constant temperature pressurize 30～60min, cooling naturally afterwards.When temperature dropped to 110～130 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows:
Table 1
Nanometer polytetrafluoroethylcomposite is because its bigger specific surface area and higher surface energy and very easily reunite, it is very poor directly to join in the resol both consistencies, disperse bad, not only can not play antifriction and fall the mill effect, also the frictional wear that might increase material because of the reunion of tetrafluoroethylene.The present invention is in order to improve the dispersion of polytetrafluorethylenano nano particle in resol, adopt the method for in-situ polymerization, make nanoparticle in the polymeric process, be distributed in the resol preferably, after finding simultaneously the polytetrafluorethylenano nano particle carried out radiation grafting, utilize the carboxyl on the engrafted nanometer particle and the hydroxyl effect of resol, generate ester group or hydrogen bond, improved the interface interaction power between nanoparticle and phenolic resin as matrix resin, make nanoparticle better be disperseed (seeing shown in Figure 1), thereby the antifriction that makes the polytetrafluorethylenano nano particle is fallen the mill effect and is better brought into play, reduced the frictional coefficient of resol, improve the wear resistance of material, and improved the mechanical property of material.
In sum, the present invention has the following advantages:
1, with the particle modified phenolic resin composite of polytetrafluorethylenano nano of the method for in-situ polymerization preparation, nanoparticle can be dispersed in the resol uniformly, has solved the scattering problem of nanoparticle.
2, add the mechanical property that a spot of polytetrafluorethylenano nano particle just can obviously improve resol.
3, preparation method provided by the invention is simple, can effectively improve the tribological property of material, obtains less frictional coefficient and lower wear rate.
Description of drawings
Fig. 1 is the deployment conditions of grafting polytetrafluorethylenano nano particle in resol.
Embodiment
Below by embodiment the present invention is specifically described; be necessary to be pointed out that at this following examples only are used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field makes some nonessential improvement and adjustment according to the invention described above to the present invention.
Embodiment 1
(1), take by weighing an amount of phenol, stir and be heated to reflux state; 5wt% by phenol and formaldehyde pure substance total amount takes by weighing ammoniacal liquor,
Join in the phenol solution; In m(phenol): n(formaldehyde)=ratio of 1:1.1 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 75 ℃, after about 60min is carried out in reaction, with the grafting of 0.5wt% the polytetrafluorethylenano nano particle of methacrylic acid join in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
(2), under 0.6Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 50 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 10MPa, be warming up to 120 ℃, again pressure is added to 20MPa, constant temperature pressurize 12min; Continue to be warming up to 170 ℃, constant temperature pressurize 30min, cooling naturally afterwards.When temperature dropped to 110 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.25; Wear rate is 0.75 * 10
-6Mm
3/ Nm; Flexural strength is 165MPa; Hardness is 105HRM.
Embodiment 2
(1) takes by weighing an amount of dihydroxyphenyl propane, stir and be heated to reflux state; Press the 4wt% weighing sodium carbonate of dihydroxyphenyl propane and formaldehyde pure substance total amount, join in the dihydroxyphenyl propane solution; In the m(dihydroxyphenyl propane): n(formaldehyde)=ratio of 1:1.3 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 80 ℃, after about 60min is carried out in reaction, the polytetrafluorethylenano nano particle of 2wt% is joined in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
(2) under 0.6Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 55 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 8MPa, be warming up to 110 ℃, again pressure is added to 20MPa, constant temperature pressurize 18min; Continue to be warming up to 170 ℃, constant temperature pressurize 45min, cooling naturally afterwards.When temperature dropped to 130 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.23; Wear rate is 0.63 * 10
-6Mm
3/ Nm; Flexural strength is 231MPa; Hardness is 102HRM.
Embodiment 3
(1) takes by weighing an amount of phenol, stir and be heated to reflux state; Press the 2wt% weighing sodium hydroxide of phenol and furfural pure substance total amount, join in the phenol solution; In m(phenol): the n(furfural)=ratio of 1:1.5 takes by weighing an amount of furfural, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 95 ℃, after about 75min is carried out in reaction, the polytetrafluorethylenano nano particle of 3wt% is joined in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
(2) under 0.5Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 70 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 10MPa, be warming up to 120 ℃, again pressure is added to 25MPa, constant temperature pressurize 15min; Continue to be warming up to 180 ℃, constant temperature pressurize 30min, cooling naturally afterwards.When temperature dropped to 130 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.20; Wear rate is 0.99 * 10
-6Mm
3/ Nm; Flexural strength is 175MPa; Hardness is 103HRM.
Embodiment 4
(1) takes by weighing an amount of dihydroxyphenyl propane, stir and be heated to reflux state; 5wt% by dihydroxyphenyl propane and formaldehyde pure substance total amount takes by weighing hydrated barta, joins in the dihydroxyphenyl propane solution; In the m(dihydroxyphenyl propane): n(formaldehyde)=ratio of 1:1.4 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 95 ℃, after about 90min is carried out in reaction, with the grafting of 1wt% the polytetrafluorethylenano nano particle of methacrylic acid join in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
(2) under 0.4Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 50 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 10MPa, be warming up to 110 ℃, again pressure is added to 20MPa, constant temperature pressurize 18min; Continue to be warming up to 180 ℃, constant temperature pressurize 45min, cooling naturally afterwards.When temperature dropped to 130 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.24; Wear rate is 0.67 * 10
-6Mm
3/ Nm; Flexural strength is 188MPa; Hardness is 105HRM.
Embodiment 5
1, takes by weighing an amount of phenol, stir and be heated to reflux state; 3wt% by phenol and formaldehyde pure substance total amount takes by weighing hydrated barta, joins in the phenol solution; In m(phenol): n(formaldehyde)=ratio of 1:1.2 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 85 ℃, after about 60min is carried out in reaction, with the grafting of 6wt% the polytetrafluorethylenano nano particle of methacrylic acid join in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
2, under 0.6Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 60 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 8MPa, be warming up to 120 ℃, again pressure is added to 20MPa, constant temperature pressurize 15min; Continue to be warming up to 160 ℃, constant temperature pressurize 60min, cooling naturally afterwards.When temperature dropped to 110 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.18; Wear rate is 1.20 * 10
-6Mm
3/ Nm; Flexural strength is 165MPa; Hardness is 109HRM.
Embodiment 6
1, takes by weighing an amount of phenol, stir and be heated to reflux state; 5wt% by phenol and furfural pure substance total amount takes by weighing ammoniacal liquor, joins in the phenol solution; In m(phenol): the n(furfural)=ratio of 1:1.3 takes by weighing an amount of furfural, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 75 ℃, after about 80min is carried out in reaction, the polytetrafluorethylenano nano particle of 5wt% is joined in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
2, under 0.8Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 70 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 10MPa, be warming up to 100 ℃, again pressure is added to 23MPa, constant temperature pressurize 18min; Continue to be warming up to 180 ℃, constant temperature pressurize 60min, cooling naturally afterwards.When temperature dropped to 130 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.20; Wear rate is 1.15 * 10
-6Mm
3/ N.m; Flexural strength is 162MPa; Hardness is 107HRM.
Embodiment 7
1, takes by weighing an amount of phenol, stir and be heated to reflux state; 4wt% by phenol and formaldehyde pure substance total amount takes by weighing ammoniacal liquor, joins in the phenol solution; In m(phenol): n(formaldehyde)=ratio of 1:1.1 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 90 ℃, after about 65min is carried out in reaction, the polytetrafluorethylenano nano particle of 0.2wt% is joined in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
2, under 0.6Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 60 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 8MPa, be warming up to 120 ℃, again pressure is added to 25MPa, constant temperature pressurize 15min; Continue to be warming up to 170 ℃, constant temperature pressurize 40min, cooling naturally afterwards.When temperature dropped to 120 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.25; Wear rate is 0.95 * 10
-6Mm
3/ Nm; Flexural strength is 167MPa; Hardness is 108HRM.
Embodiment 8
1, takes by weighing an amount of phenol, stir and be heated to reflux state; 5wt% by phenol and formaldehyde pure substance total amount takes by weighing ammoniacal liquor, joins in the phenol solution; In m(phenol): n(formaldehyde)=ratio of 1:1.4 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution in batches, make temperature of reaction remain on about about 85 ℃, after about 90min is carried out in reaction, with the grafting of 2wt% the polytetrafluorethylenano nano particle of methacrylic acid join in the above-mentioned solution, continue to stir, until having observed the obvious layering of water.
2, under 0.8Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 70 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
The particle modified resol powder of above-mentioned polytetrafluorethylenano nano is adopted the compression molding moulding, and concrete steps are as follows:
Powder is placed in the mould, under the pressure condition of 8MPa, be warming up to 100 ℃, again pressure is added to 20MPa, constant temperature pressurize 12min; Continue to be warming up to 180 ℃, constant temperature pressurize 55min, cooling naturally afterwards.When temperature dropped to 110 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
The fundamental property of material of the present invention is as follows: frictional coefficient is 0.23; Wear rate is 0.70 * 10
-6Mm
3/ Nm; Flexural strength is 219MPa; Hardness is 111HRM.
Comparative example 1
1, takes by weighing an amount of phenol, stir and be heated to reflux state; 5wt% by phenol and formaldehyde pure substance total amount takes by weighing ammoniacal liquor, joins in the phenol solution; In m(phenol): n(formaldehyde)=ratio of 1:1.1 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution, make temperature of reaction remain on about about 75 ℃, about 60min is carried out in reaction. in batches
2, under 0.6Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 50 ℃ of conditions, pulverize, obtain pulverous resol.
The above-mentioned resol powder for preparing is adopted compression molding method, and concrete steps are as follows: powder is placed in the mould, under the pressure condition of 10MPa, be warming up to 120 ℃, again pressure is added to 20MPa, constant temperature pressurize 12min; Continue to be warming up to 170 ℃, constant temperature pressurize 30min, cooling naturally afterwards.When temperature dropped to 110 ℃, mould unloading promptly obtained the phenolic resin material of moulding.
The fundamental property of this material is as follows: frictional coefficient is 0.28; Wear rate is 1.75 * 10
-6Mm
3/ Nm; Flexural strength is 137MPa; Hardness is 89HRM.
Comparative example 2
1, takes by weighing an amount of dihydroxyphenyl propane, stir and be heated to reflux state; Press the 3wt% weighing sodium carbonate of dihydroxyphenyl propane and formaldehyde pure substance total amount, join in the dihydroxyphenyl propane solution; In the m(dihydroxyphenyl propane): n(formaldehyde)=ratio of 1:1.3 takes by weighing an amount of formaldehyde, and add in the above-mentioned solution, make temperature of reaction remain on about about 85 ℃, about 70min is carried out in reaction. in batches
2, under 0.8Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 60 ℃ of conditions, pulverize, obtain pulverous resol.
The above-mentioned resol powder for preparing is adopted compression molding method, and concrete steps are as follows: powder is placed in the mould, under the pressure condition of 8MPa, be warming up to 110 ℃, again pressure is added to 22MPa, constant temperature pressurize 15min; Continue to be warming up to 160 ℃, constant temperature pressurize 40min, cooling naturally afterwards.When temperature dropped to 130 ℃, mould unloading promptly obtained the phenolic resin material of moulding.
The fundamental property of this material is as follows: frictional coefficient is 0.27; Wear rate is 1.80 * 10
-6Mm
3/ Nm; Flexural strength is 134MPa; Hardness is 87HRM.
The contrast of the material fundamental property by above embodiment and comparative example, as can be seen, matrix material of the present invention just can obviously improve the wear resistance of matrix material and reduce the frictional coefficient of material under the situation of adding a small amount of nano level tetrafluoroethylene, and in the matrix material that obtains, nanometer polytetrafluoroethylcomposite is uniformly dispersed, the difficult reunion, and can improve mechanical property.
Claims (7)
1. the particle modified phenolic resin composite of polytetrafluorethylenano nano is characterized in that being formed by resol and the assembly of polytetrafluorethylenano nano particle, and the weight percent of each component is:
Resol 93～99.9wt%
Polytetrafluorethylenano nano particle 0.1～7wt%
Described resol is by precursor phenolic compound and aldehyde compound reactive polymeric and the heat-reactive phenolic resin that obtains under the alkaline catalysts effect.
2. matrix material as claimed in claim 1 is characterized in that described phenolic compound is selected from phenol, dihydroxyphenyl propane.
3. matrix material as claimed in claim 1 is characterized in that described aldehyde compound is selected from formaldehyde, furfural.
4. matrix material as claimed in claim 1 is characterized in that described catalyzer is selected from ammoniacal liquor, hydrated barta, yellow soda ash, sodium hydroxide.
5. matrix material as claimed in claim 1 is characterized in that, described polytetrafluorethylenano nano particle is grafting and grafted polytetrafluorethylenano nano particle not, and nano-particles size is 20～70nm.
6. preparation method as the described matrix material of one of claim 1～5 is characterized in that concrete steps are as follows:
(1) weighing phenolic compound stirs and is heated to reflux state; Catalyzer is joined in the above-mentioned phenolic compound solution; The weighing aldehyde compound adds in the above-mentioned solution, reacts, and temperature of reaction is 75～95 ℃, reaction times 60～90min; Then the polytetrafluorethylenano nano particle is joined in the above-mentioned solution, continue to stir, until having observed the obvious layering of water; Wherein, count by weight proportion, phenolic compound: aldehyde compound=1:1.1～1.5, catalyzer is 2～5wt% of phenols and aldehyde compound pure substance total amount, the polytetrafluorethylenano nano particle is 0.1～7wt% of matrix material total mass;
(2) under 0.4～0.8Mpa, vacuumize, remove and anhydrate and free phenol, again sintetics is put in the vacuum drying oven, dry under 50～70 ℃ of conditions, pulverize, obtain the particle modified resol of pulverous polytetrafluorethylenano nano.
7. forming method as the described matrix material of one of claim 1～5, it is characterized in that concrete steps are as follows: the powdery polytetrafluoroethylene teflon nano particle modified alkyd resin is placed in the mould, under the pressure condition of 8～10MPa, be warming up to 100～120 ℃, again pressure is added to 20～25MPa, constant temperature pressurize 12～18min; Continue to be warming up to 160～180 ℃, constant temperature pressurize 30～60min, cooling naturally afterwards; When temperature dropped to 110～130 ℃, mould unloading promptly obtained the particle modified phenolic resin composite of polytetrafluorethylenano nano of moulding.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105694309A (en) * | 2016-01-27 | 2016-06-22 | 燕山大学 | Preparation method of nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material |
| CN106947041A (en) * | 2017-03-31 | 2017-07-14 | 西京学院 | A kind of preparation method of modified phenolic fiber |
| CN116641235A (en) * | 2023-04-27 | 2023-08-25 | 洛阳轴承研究所有限公司 | A kind of porous phenolic cloth composite material and its preparation method, cage, bearing |
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| GB1196935A (en) * | 1966-09-06 | 1970-07-01 | Bendix Corp | Moldable Bearing Material and Articles made therefrom |
| CN1803893A (en) * | 2004-12-24 | 2006-07-19 | 莱茵化学莱茵瑙有限公司 | Microgel-containing thermosetting composition |
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| US3322710A (en) * | 1964-07-20 | 1967-05-30 | Haveg Industries Inc | Process for preparing uniform dispersions of fibrillated polytetrafluoroethylene particles in a thermosetting resin |
| GB1196935A (en) * | 1966-09-06 | 1970-07-01 | Bendix Corp | Moldable Bearing Material and Articles made therefrom |
| CN1803893A (en) * | 2004-12-24 | 2006-07-19 | 莱茵化学莱茵瑙有限公司 | Microgel-containing thermosetting composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105694309A (en) * | 2016-01-27 | 2016-06-22 | 燕山大学 | Preparation method of nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material |
| CN106947041A (en) * | 2017-03-31 | 2017-07-14 | 西京学院 | A kind of preparation method of modified phenolic fiber |
| CN116641235A (en) * | 2023-04-27 | 2023-08-25 | 洛阳轴承研究所有限公司 | A kind of porous phenolic cloth composite material and its preparation method, cage, bearing |
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