CN100335550C - Method for preparing Nano composite material of polyethylene in super high molecular weight - Google Patents
Method for preparing Nano composite material of polyethylene in super high molecular weight Download PDFInfo
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Abstract
The present invention relates to a preparation method of nanometer ultrahigh molecular weight polyethylene composite materials. In a reaction kettle, 100 parts by weight of ultrahigh molecular weight polyethylene is dissolved in 1000 to 5000 parts by weight of solvent at 130 to 180 DEG C; 0.1 to 20 parts by weight of polar monomers and 0.01 to 5 parts by weight of initiators are added; the mixture reacts for 1 to 3 hours under the pressure of 5 to 20MPa, and 0.5 to 10 parts by weight of nanometer inorganic material powders are added for continuous reaction for 1 to 2 hours; the reactants are precipitated by 500 to 1000 parts by weight of flocculant, pumped, filtered in vacuum, washed and dried for preparing the nanometer ultrahigh molecular weight polyethylene composite material. The composite material prepared by the method of the present invention has thermal deformation temperature and mechanical property obviously higher than those of pure ultrahigh molecular weight polyethylene, and widens the application field of ultrahigh molecular weight polyethylene materials.
Description
Technical field
The present invention relates to a kind of preparation method of modified with ultrahigh molecular weight polyethylene matrix material, specifically adopt after the solution grafting surface chemical modification ultrahigh molecular weight polyethylene(UHMWPE) again and the compound method of making matrix material of nano inorganic material.
Background technology
Ultrahigh molecular weight polyethylene(UHMWPE) (UHMWPE) is a kind of thermoplastic engineering plastic of excellent performance, because of its excellent physical and mechanical properties, make it to be widely used in industries such as machinery, chemical industry, food and papermaking, can be used as and make corrosion-resistant, wear-resistant, HI high impact, the low temperature resistant and starting material that can not use the component of lubricating oil, also can be used as the starting material of preparation feed bin lining, chute, slideway liner plate, slide rail, fuel tank etc.
Ultrahigh molecular weight polyethylene(UHMWPE) belongs to the linear macromolecule structure, molecular chain is very long, and tangle mutually, melt viscosity is high, because it is extremely insensitive to hot shearing, shear fracture takes place easily, or be heated and degrade, and, can't satisfy some special requirements of client because macromolecule polyethylene base itself exists defectives such as heat-drawn wire is low, hardness is not enough, the dimensional contraction rate is big.For example the use temperature of some ash discharge pipeline of power plant reaches more than 90 ℃; The material wear ability of some coal mine equipment requires to have surpassed the wear resistance index of pure ultra-high molecular mass polyethylene; Glass industry proposes further to improve the surface hardness of superhigh molecular weight polyethylene material, enables to use in the sector.
At of the particular requirement of above-mentioned industry, need be fit to some special requirements of industries by pure ultra-high molecular mass polyethylene is carried out modification to superhigh molecular weight polyethylene material.Adopting nanotechnology that ultrahigh molecular weight polyethylene(UHMWPE) is carried out modification is exactly one of numerous methods.But, with nanotechnology ultrahigh molecular weight polyethylene(UHMWPE) is carried out the modification meeting and run into following problems: (1) is because the ultrahigh molecular weight polyethylene(UHMWPE) molecular chain is very long, tangle mutually each other, even under molten state, its melt viscosity is still very high, causes directly difficulties in dispersion in the pure ultra-high molecular mass polyethylene matrix of Nano filling particle.(2) there is interfacial effect between Nano filling particle and ultrahigh molecular weight polyethylene(UHMWPE) matrix, can reduces even eliminate two alternate interfaces, realize two alternate compatible even combinations.(3) because ultrahigh molecular weight polyethylene(UHMWPE) is of many uses, when different occasions were used, the client can propose different requirements to the performance of product, and the nano composite material of single variety is difficult to satisfy different performance requriementss.Therefore, at specific requirement, the Nano composite material of polyethylene in super high molecular weight of exploitation series of different has realistic meaning.
Ultrahigh molecular weight polyethylene(UHMWPE) is a kind of hydrophobicity, non-polar polymer, and general nano inorganic material all is hydrophilic polar materials, because the molecule segment of ultrahigh molecular weight polyethylene(UHMWPE) is extremely long, twine severity mutually, therefore can't adopt fusion-grafting method of modifying commonly used.U.S. Brennan, people such as A.B. are by adopting
60The method of Co-gamma-ray irradiation ultrahigh molecular weight polyethylene(UHMWPE) surface grafting polystyrene and styrene-propene acid butyl ester-cyclohexyl methyl acrylate terpolymer, however irradiation grafting modification expense is very high, is unfavorable for industrial applications.EP0722973A1, Korea S Yim, Chae I. etc. discloses a kind of modified with ultrahigh molecular weight polyethylene method, employing uses the peroxide crosslinking ultrahigh molecular weight polyethylene(UHMWPE) strengthening its wear resistance under molten state, but ultrahigh molecular weight polyethylene(UHMWPE) mechanical property after crosslinked can descend.
Summary of the invention
At above-mentioned prior art, the invention provides a kind of preparation method of Nano composite material of polyethylene in super high molecular weight, adopt the grafting solution method polar monomer to carry out the ultrahigh molecular weight polyethylene(UHMWPE) interface modification, increase the consistency of itself and hydrophilic polar nano inorganic materials, again will be compound through the ultrahigh molecular weight polyethylene(UHMWPE) and the nano inorganic material of interface modification, just obtain the Nano composite material of polyethylene in super high molecular weight of excellent performance.
The present invention realizes like this.The preparation method of Nano composite material of polyethylene in super high molecular weight of the present invention, be that ultrahigh molecular weight polyethylene(UHMWPE) with 100 weight parts is under 130～180 ℃, be dissolved in the solvent of 1000～5000 weight parts, add 0.1～20 weight part polar monomer and 0.01～5 weight part initiator then, under 5～20MPa pressure, reacted 1～3 hour, add 0.5～10 weight part nano inorganic material powder again, continue reaction 1～2 hour, make the reactant precipitation with 500～1000 weight part flocculation agents, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight.
In the inventive method, the usage quantity of preferred solvent is 2000～3000 weight parts, and the usage quantity of polar monomer is 0.5～10 weight part, and the usage quantity of initiator is 0.1～5 weight part, the usage quantity of nano inorganic material is 1～5 weight part, and the usage quantity of flocculation agent is 500～800 weight parts.
In the inventive method, the viscosity-average molecular weight of described ultrahigh molecular weight polyethylene(UHMWPE) is 200～5,000,000; Described solvent is a kind of in dimethylbenzene, perhydronaphthalene, the naphthane; Described polar monomer is a kind of in maleic anhydride, vinylformic acid, the α-Jia Jibingxisuan; Described initiator is benzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2, a kind of in 5-di-t-butyl peroxide-3-acetylene; Described nano inorganic material is SiO
2, Al
2O
3, CaCO
3, a kind of in the polynite; Described flocculation agent is a kind of in ethanol or the acetone.
The present invention compared with prior art has the following advantages:
1, ultrahigh molecular weight polyethylene(UHMWPE) is a kind of hydrophobicity, non-polar polymer, and general nano inorganic material all is hydrophilic polar materials, and both consistencies are poor.The present invention is compatible good and stable compound system for the material that makes these two kinds of thermodynamic compatibility differences becomes, adopted the interface modification method that ultrahigh molecular weight polyethylene(UHMWPE) is carried out grafting solution method, increase its surface polarity, improved the consistency of it and nano inorganic material.
2, adopt the mechanical property and the Good Heat-resistance of the Nano composite material of polyethylene in super high molecular weight of the inventive method preparation, be significantly improved, expanded the Application Areas of superhigh molecular weight polyethylene material than pure ultra-high molecular mass polyethylene material.
Embodiment
Further describe the present invention with specific embodiments of the invention below, but and do not mean that restriction the present invention.Each component dosage is parts by weight among the embodiment.
The testing method of material performance index is in following examples:
The testing method of tensile yield strength is with reference to GB/T1040-1992;
The testing method of tension fracture elongation rate is with reference to GB/T1040-1992;
The testing method of socle girder notched Izod impact strength is with reference to GB/T1843-1980;
The testing method of volume wear rate is with reference to GB/T3960-1983;
The testing method of frictional coefficient is with reference to GB/T3960-1983;
The testing method of heat-drawn wire is with reference to GB/T1643-1979.
Embodiment 1
In reactor, put into 2000 parts of perhydronaphthalenes, being warming up to and putting into 100 parts of viscosity-average molecular weights after 170 ℃ is ultrahigh molecular weight polyethylene(UHMWPE) powder of 5,000,000, stir, the ultrahigh molecular weight polyethylene(UHMWPE) powder is dissolved in the perhydronaphthalene solvent fully, add 10 parts of maleic anhydrides and 1 part of dicumyl peroxide, reaction is 1 hour under 10MPa pressure, adds 5 parts of polynites then, continues reaction 2 hours, add 600 parts of acetone again, vigorous stirring makes reactant precipitation, vacuum filtration, washing, drying obtains the intercal type nano ultra-high molecular weight polyethylene composite material.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 2
In reactor, put into 2000 parts of perhydronaphthalenes, being warming up to and putting into 100 parts of viscosity-average molecular weights after 180 ℃ is ultrahigh molecular weight polyethylene(UHMWPE) powder of 2,000,000, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 20 parts of maleic anhydrides, 3 part 2,5-dimethyl-2,5-di-t-butyl peroxide-3-acetylene, reaction is 3 hours under 20MPa pressure, add 3 parts of polynites then, continue reaction 2 hours, add 600 parts of acetone again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains exfoliated Nano composite material of polyethylene in super high molecular weight.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 3
In reactor, put into 4000 parts of naphthanes, being warming up to and putting into 100 parts of viscosity-average molecular weights after 150 ℃ is ultrahigh molecular weight polyethylene(UHMWPE) powder of 4,000,000, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 15 parts of maleic anhydrides, 2 parts of dicumyl peroxides, reaction is 2 hours under 10MPa pressure, adds 10 parts of nanometer Al then
2O
3, continue reaction 2 hours, add 800 parts of acetone again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains ultrahigh molecular weight polyethylene(UHMWPE)/Al
2O
3Nano composite material.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 4
In reactor, put into 1000 parts of perhydronaphthalenes, being warming up to and putting into 100 parts of viscosity-average molecular weights after 170 ℃ is ultrahigh molecular weight polyethylene(UHMWPE) powder of 2,500,000, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 20 parts of maleic anhydrides, 5 part 2,5-dimethyl-2,5-di-t-butyl peroxide-3-acetylene, reaction is 3 hours under 5 MPa pressure, adds 1.5 parts of nanometer SiO then
2, continue reaction 1.5 hours, add 800 parts of acetone again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains ultrahigh molecular weight polyethylene(UHMWPE)/SiO
2Nano composite material.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 5
In reactor, put into 2000 parts of perhydronaphthalenes, being warming up to and putting into 100 parts of viscosity-average molecular weights after 130 ℃ is ultrahigh molecular weight polyethylene(UHMWPE) powder of 3,000,000, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 0.5 part of vinylformic acid, 0.01 part of benzoyl peroxide, reaction is 1.5 hours under 5MPa pressure, add 0.5 part of polynite then, continue reaction 2 hours, add 500 parts of ethanol again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 6
In reactor, put into 2000 parts of naphthanes, be warming up to and put into 100 parts ultrahigh molecular weight polyethylene(UHMWPE) powder after 150 ℃, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 0.1 part of α-Jia Jibingxisuan, 0.1 part of dicumyl peroxide, reaction is 1 hour under 20MPa pressure, adds 1 part of CaCO then
3, continue reaction 1 hour, add 700 parts of acetone again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 7
In reactor, put into 3000 parts of dimethylbenzene, be warming up to and put into 100 parts ultrahigh molecular weight polyethylene(UHMWPE) powder after 175 ℃, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 1 part of vinylformic acid, 0.5 part 2,5-dimethyl-2,5-di-t-butyl peroxide-3-acetylene, reaction is 1 hour under 15MPa pressure, adds 2 parts of Al then
2O
3, continue reaction 1.5 hours, add 500 parts of ethanol again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 8
In reactor, put into 5000 parts of perhydronaphthalenes, be warming up to and put into 100 parts ultrahigh molecular weight polyethylene(UHMWPE) powder after 140 ℃, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 5 parts of α-Jia Jibingxisuans, 4 parts of benzoyl peroxides, reaction is 3 hours under 8MPa pressure, adds 8 parts of SiO then
2, continue reaction 1 hour, add 1000 parts of acetone again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Embodiment 9
In reactor, put into 4000 parts of perhydronaphthalenes, be warming up to and put into 100 parts ultrahigh molecular weight polyethylene(UHMWPE) powder after 170 ℃, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 15 parts of maleic anhydrides, 3 part 2,5-dimethyl-2,5-di-t-butyl peroxide-3-acetylene, reaction is 2 hours under 12MPa pressure, adds 3 parts of CaCO then
3, continue reaction 2 hours, add 900 parts of acetone again, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight.The Nano composite material of polyethylene in super high molecular weight performance sees Table 1.
Comparative Examples
In reactor, put into 3000 parts of dimethylbenzene, be warming up to and put into 100 parts ultrahigh molecular weight polyethylene(UHMWPE) powder after 135 ℃, stir, make the ultrahigh molecular weight polyethylene(UHMWPE) powder dissolve the back fully and add 10 parts of maleic anhydrides, 0.5 part of benzoyl peroxide, reaction is 2 hours under 10MPa pressure, adds 600 parts of acetone then, vigorous stirring makes the reactant precipitation, vacuum filtration, washing, drying, obtain ultrahigh molecular weight polyethylene(UHMWPE)-g-MAH graft copolymer, recording percentage of grafting is 1.3%.
Table 1 Nano composite material of polyethylene in super high molecular weight performance index
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Comparative Examples |
| Tensile yield strength (100mm/min), MPa | 24.3 | 24.6 | 24.2 | 24.2 | 25.1 | 25.4 | 23.8 | 26.5 | 25.6 | 22.6 |
| Tension fracture elongation rate (100mm/min), % | 498 | 462 | 455 | 423 | 477 | 352 | 385 | 449 | 480 | 306 |
| Socle girder notched Izod impact strength (normal temperature), J/m | 970, constantly | 992, constantly | 1058, constantly | 972, constantly | 863, constantly | 821, constantly | 753, constantly | 1158, constantly | 1071 | 72.11, constantly |
| Socle girder notched Izod impact strength (40 ℃), J/m | 1370, constantly | 1439, constantly | 1423, constantly | 1228, constantly | 1148, constantly | 1253, constantly | 906, constantly | 1576, constantly | 1420 | 892, constantly |
| The volume wear rate | 1.32×10 -4 | 1.27×10 -4 | 1.14×10 -4 | 1.14×10 -4 | 1.21×10 -4 | 1.34×10 -4 | 1.17×10 -4 | 1.25×10 -4 | 1.14×10 -4 | 1.07×10 -4 |
| Frictional coefficient | 0.14 | 0.14 | 0.15 | 0.12 | 0.13 | 0.17 | 0.15 | 0.14 | 0.13 | 0.15 |
| Heat-drawn wire (0.45MPa), ℃ | 89.4 | 83.7 | 101.2 | 99.1 | 92.4 | 90.8 | 82.3 | 97.3 | 90.4 | 80.0 |
Claims (7)
1, a kind of preparation method of Nano composite material of polyethylene in super high molecular weight, this method is in reactor, with the ultrahigh molecular weight polyethylene(UHMWPE) of 100 weight parts under 130～180 ℃, be dissolved in the solvent of 1000～5000 weight parts, add 0.1～20 weight part polar monomer and 0.01～5 weight part initiator then, under 5～20MPa pressure, reacted 1～3 hour, add 0.5～10 weight part nano inorganic material powder again, continue reaction 1～2 hour, make the reactant precipitation with 500～1000 weight part flocculation agents, vacuum filtration, washing, drying obtains Nano composite material of polyethylene in super high molecular weight, and described polar monomer is a maleic anhydride, vinylformic acid, a kind of in the α-Jia Jibingxisuan.
2, the method for claim 1, it is characterized in that: in described method, the usage quantity of solvent is 2000～3000 weight parts, the usage quantity of polar monomer is 0.5～10 weight part, the usage quantity of initiator is 0.1～5 weight part, the usage quantity of nano inorganic material is 1～5 weight part, and the usage quantity of flocculation agent is 500～800 weight parts.
3, method as claimed in claim 1 or 2, the viscosity-average molecular weight that it is characterized in that described ultrahigh molecular weight polyethylene(UHMWPE) are 200～5,000,000.
4, method as claimed in claim 1 or 2 is characterized in that described solvent is a kind of in dimethylbenzene, perhydronaphthalene, the naphthane.
5, method as claimed in claim 1 or 2 is characterized in that described initiator is benzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2, a kind of in 5-di-t-butyl peroxide-3-acetylene.
6, method as claimed in claim 1 or 2 is characterized in that described nano inorganic material is SiO
2, Al
2O
3, CaCO
3, a kind of in the polynite.
7, method as claimed in claim 1 or 2 is characterized in that described flocculation agent is a kind of in ethanol or the acetone.
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Cited By (1)
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| US11478819B2 (en) | 2019-08-02 | 2022-10-25 | King Fahd University Of Petroleum And Minerals | Method for forming a polyethylene alumina nanocomposite coating |
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| CN101457476B (en) * | 2007-12-14 | 2010-12-01 | 上海化工研究院天地科技发展有限公司 | Ultra-high molecular weight polyethylene fiber surface treatment method |
| EP2308922A1 (en) | 2009-10-08 | 2011-04-13 | Hong Jen Textile Co. Ltd. | Ultra-high molecular weight polyethylene (uhmwpe)/inorganic nanocomposite material and high performance fiber manufacturing method thereof |
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| CN103788460B (en) * | 2014-02-19 | 2017-01-18 | 上海化工研究院 | Preparation method of polyethylene hybrid inorganic material |
| JP6341505B2 (en) * | 2014-06-02 | 2018-06-13 | 国立大学法人東北大学 | Powder for cold spray, method for producing polymer coating, and polymer coating |
| CN105385087A (en) * | 2015-12-22 | 2016-03-09 | 合肥仲农生物科技有限公司 | High-strength nanocomposite |
| CN105482228A (en) * | 2016-01-05 | 2016-04-13 | 广州枫叶管业有限公司 | Polyethylene nano-modified composite and preparing method and application thereof |
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Assignee: Shanghai Lianle Chemical Industry Science and Technology Co., Ltd. Assignor: Shanghai Research Institute of Chemical Industry Contract fulfillment period: 2007.10.16 to 2013.10.15 contract change Contract record no.: 2008310000010 Denomination of invention: Method for preparing Nano composite material of polyethylene in super high molecular weight Granted publication date: 20070905 License type: Exclusive license Record date: 2008.9.1 |
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