CN105801968A - Nano-magnesia doped polyethylene direct-current cable composite with good compactness and preparation method of composite - Google Patents
Nano-magnesia doped polyethylene direct-current cable composite with good compactness and preparation method of composite Download PDFInfo
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- CN105801968A CN105801968A CN201610223335.9A CN201610223335A CN105801968A CN 105801968 A CN105801968 A CN 105801968A CN 201610223335 A CN201610223335 A CN 201610223335A CN 105801968 A CN105801968 A CN 105801968A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a nano-magnesia doped polyethylene direct-current cable composite with good compactness. The composite is prepared from the following raw materials in parts by weight: 1-1.3 parts of benzoin, 0.6-0.8 parts of cobalt aluminate, 2.3-2.6 parts of triphenyl phosphate, 5-5.5 parts of montmorillonite, 15-18 parts of water, 10-11 parts of nano-magnesia, 90-91 parts of polyethylene, 30-35 parts of N, N-dimethyl formamide, 200-220 parts of a sulfuric acid solution with the concentration being 20wt%-22wt%, 100-120 parts of perfluorocaprylic acid, 23-27 parts of nano-polytetrafluoroethylene micro powder, 70-75 parts of chloroform, 2.4-2.5 parts of methyl methacrylate, 0.1-0.2 parts of potassium persulfate and 1.5-1.6 parts of nonionic borate. According to the composite, benzoin, cobalt aluminate and triphenyl phosphate are used for modifying montmorillonite, therefore, pores of the composite can be reduced, and the strength and the electrical performance are improved.
Description
Technical field
The present invention relates to CABLE MATERIALS technical field, particularly relate to a kind of good nano oxidized mg-doped polyethylene direct current cables composite of compactness and preparation method thereof.
Background technology
Mixed nanometer has been widely used for improving the heat conductivility of material, mechanical property, electrical property etc..In recent decades, initial micron particle, micro-nano particle it is compound to nano-particle doping and makes material property be promoted further, develop many novel special type function materials.In insulant field, mixed nanometer improves the electrical property of material and is also gradually paid attention to.Currently, saving the energy has become the important step of social development, and traditional ac transmission is owing in electric energy course of conveying, loss is big, adnexa is complicated, high in cost of production shortcoming, and direct current transportation can make up these shortcomings.Direct current transportation has three kinds of modes: oil-filled cable is transmitted electricity；Oil-paper cable power transmission；Plastics direct current cables is transmitted electricity.Wherein plastics direct current cables has powerful potentiality, is mainly used in transmission of electricity over strait, Urban Underground power grid construction etc..But plastic cable is when direct current transportation, it may occur that conductor injects electronics and hole to insulating barrier, and insulating barrier is owing to being inhomogeneous medium, easily it is susceptible to electronics or hole accumulation, forms Space-charge effect, cause electric field distortion, there is electrical breakdown time serious, cause transmission of electricity accident.The application of mixed nanometer technology, provides direction for solving plastics direct current cables space charge accumulation problems.
Research shows, adds a small amount of nano-particle ZnO, TiO in insulated cable material2、SiO2Deng, a space charge accumulation difficult problem can be improved.Research finds, adds nano-particle and can effectively suppress space charge to gather in crosslinked polyethylene (XLPE), improves breakdown strength and specific insulation, suppression electric branch growth, improves the electric property of insulant.This makes nano-particle/XLPE composite more and more concerned, and people are referred to as third generation insulant.At present, Japanese Scientists has successfully passed and has added a small amount of MgO in polyethylene, prepares the high voltage direct current cable of 250kV/mm and 500kV/mm, is just waiting that business is applied.Also there is the nano modification CABLE MATERIALS of commercialization in DOW company of the U.S..But, how the mechanism that space charge gathers is suppressed for nano-particle, does not the most also have consistent conclusion.
Research shows, adds a small amount of nano-particle ZnO, TiO in insulated cable material2、SiO2Deng, a space charge accumulation difficult problem can be improved.Research finds, adds nano-particle and can effectively suppress space charge to gather in crosslinked polyethylene (XLPE), improves breakdown strength and specific insulation, suppression electric branch growth, improves the electric property of insulant.This makes nano-particle/XLPE composite more and more concerned, and people are referred to as third generation insulant.At present, Japanese Scientists has successfully passed and has added a small amount of MgO in polyethylene, prepares the high voltage direct current cable of 250kV/mm and 500kV/mm, is just waiting that business is applied.Also there is the nano modification CABLE MATERIALS of commercialization in DOW company of the U.S..But, how the mechanism that space charge gathers is suppressed for nano-particle, does not the most also have consistent conclusion.
" preparation of nano-MgO doping polyethylene direct current cables composite and performance " literary composition obtains the MgO granule on surface not hydroxyl (OH) by heat treatment method, mother material is used to be prepared for 10wt%MgO/ polyethylene (LDPE) composite, and have studied MgO/LDPE composite space charge characteristic under 70kV/mm DC electric field, have evaluated the method effect scattered to nano-particle and industrial applications promotional value.Additionally, be investigated MgO surface hydroxylation (OH) to the nano-MgO granule doping space charge characteristic of LDPE, alternating temperature specific insulation and the impact of dielectric property, and probe into MgO suppression space charge mechanism.
But 10 wt% MgO/ polyethylene (LDPE) composites that this article uses mother material to prepare can absorb moisture in wet environment, magnesium hydroxide can be generated, affect the space charge characteristic of composite, alternating temperature specific insulation and dielectric property, need to improve.Additionally the anti-flammability of this composite, intensity, crack resistance, buckle resistance, tear resistance, tolerance to cold, wearability, moisture resistance, compactness, resistance to ag(e)ing need to improve.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of good nano oxidized mg-doped polyethylene direct current cables composite of compactness and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of good nano oxidized mg-doped polyethylene direct current cables composite of compactness, it is prepared by the raw materials in: diphenylhydroxyethanone 1-1.3, cobalt aluminate 0.6-0.8, triphenyl phosphate 2.3-2.6, montmorillonite 5-5.5, water 15-18, nano magnesia 10-11, polyethylene 90-91, N, the sulfuric acid solution 200-220 of N '-dimethyl Methanamide 30-35,20-22wt%, perfluoro caprylic acid 100-120, nanometer polytetrafluoroethylcomposite micropowder 23-27, chloroform 70-75, methyl methacrylate 2.4-2.5, potassium peroxydisulfate 0.1-0.2, nonionic borate 1.5-1.6.
The preparation method of the good nano oxidized mg-doped polyethylene direct current cables composite of described compactness, comprises the following steps:
(1) montmorillonite is added to the water, is heated to 70-80 DEG C, add diphenylhydroxyethanone, cobalt aluminate, triphenyl phosphate, stir 30-40 minute, drying and crushing, cross 300-400 mesh sieve, obtain powder；
(2) nano magnesia, perfluoro caprylic acid are carried out being mixed to join N, in N '-dimethyl Methanamide, ultrasonic 30-35 minute, drip sulfuric acid solution the most while stirring, be again heated to 80-85 DEG C of stirring reaction 20-30 minute, after terminating reaction, filtering, vacuum drying obtains fluorinated nano magnesium oxide；
(3) being mixed with nanometer polytetrafluoroethylcomposite micropowder by fluorinated nano magnesium oxide, join in chloroform, ultrasonic disperse 1-1.2h, volatilization removes chloroform, is dried to obtain nanometer powder；
(4) powder (1st) step obtained is mixed homogeneously with described nanometer powder with methyl methacrylate, nonionic borate, adds potassium peroxydisulfate mix homogeneously, obtains mixed material；
(5) mixed material (4th) step obtained and other surplus stocks, send in high-speed mixer and mix, mix homogeneously at 135-140 DEG C, then through pelletize and get final product.
The invention have the advantage that nano magnesia is fluorinated by the present invention, Nano microsphere is made with nanometer polytetrafluoroethylcomposite micropowder, prevent CABLE MATERIALS water suction magnesium oxide from becoming magnesium hydroxide and affect the specific insulation of composite, improve the breakdown strength of composite, and improve the dispersibility of nano magnesia, reduce agglomeration, improve the lubricity of composite；Re-use methyl methacrylate, nonionic borate is modified, and improves the compatibility of nanometer powder and polyethylene, prevent powder body and sub polyethylene from, intensity reduces.By using diphenylhydroxyethanone, cobalt aluminate, triphenyl phosphate that montmorillonite is carried out intercalation modifying, obtaining fine powder, the dispersibility of montmorillonite is more preferable, strengthens with the associativity of polyethylene, diphenylhydroxyethanone can reduce the hole of composite, improves compactness, intensity and electric property.
Detailed description of the invention
A kind of good nano oxidized mg-doped polyethylene direct current cables composite of compactness, it is made up of the raw material of following weight portion (kilogram): diphenylhydroxyethanone 1, cobalt aluminate 0.6, triphenyl phosphate 2.3, montmorillonite 5, water 15, nano magnesia 10, polyethylene 90, N, N '-dimethyl Methanamide 30, the sulfuric acid solution 200 of 20wt%, perfluoro caprylic acid 100, nanometer polytetrafluoroethylcomposite micropowder 23, chloroform 70, methyl methacrylate 2.4, potassium peroxydisulfate 0.1, nonionic borate 1.5.
The preparation method of the good nano oxidized mg-doped polyethylene direct current cables composite of described compactness, comprises the following steps:
(1) montmorillonite is added to the water, is heated to 70 DEG C, add diphenylhydroxyethanone, cobalt aluminate, triphenyl phosphate, stir 30 minutes, drying and crushing, cross 300 mesh sieves, obtain powder；
(2) nano magnesia, perfluoro caprylic acid are carried out being mixed to join N, in N '-dimethyl Methanamide, ultrasonic 30 minutes, drip sulfuric acid solution the most while stirring, be again heated to 80 DEG C of stirring reactions 20 minutes, after terminating reaction, filtering, vacuum drying obtains fluorinated nano magnesium oxide；
(3) being mixed with nanometer polytetrafluoroethylcomposite micropowder by fluorinated nano magnesium oxide, join in chloroform, ultrasonic disperse 1h, volatilization removes chloroform, is dried to obtain nanometer powder；
(4) powder (1st) step obtained is mixed homogeneously with described nanometer powder with methyl methacrylate, nonionic borate, adds potassium peroxydisulfate mix homogeneously, obtains mixed material；
(5) mixed material (4th) step obtained and other surplus stocks, send in high-speed mixer and mix, mix homogeneously at 135 DEG C, then through pelletize and get final product.
The fusing point of this embodiment composite is 119 DEG C, under 70kV/mm electric field, does not occur that space charge gathers in pressurization 90min, and dielectric constant is 2.36；Carry out Mechanics Performance Testing, be fabricated to the sample of thickness 3 mm and test for oxygen index (OI), knot test result be hot strength be 27.6MPa, elongation at break is 276%, and oxygen index (OI) is 38.1, electrical strength is 39.7V/m.
Claims (2)
1. the good nano oxidized mg-doped polyethylene direct current cables composite of compactness, it is characterized in that: be prepared by the raw materials in: diphenylhydroxyethanone 1-1.3, cobalt aluminate 0.6-0.8, triphenyl phosphate 2.3-2.6, montmorillonite 5-5.5, water 15-18, nano magnesia 10-11, polyethylene 90-91, N, N '-dimethyl Methanamide 30-35, the sulfuric acid solution 200-220 of 20-22wt%, perfluoro caprylic acid 100-120, nanometer polytetrafluoroethylcomposite micropowder 23-27, chloroform 70-75, methyl methacrylate 2.4-2.5, potassium peroxydisulfate 0.1-0.2, nonionic borate 1.5-1.6.
The preparation method of the good nano oxidized mg-doped polyethylene direct current cables composite of compactness the most according to claim 1, it is characterised in that comprise the following steps:
(1) montmorillonite is added to the water, is heated to 70-80 DEG C, add diphenylhydroxyethanone, cobalt aluminate, triphenyl phosphate, stir 30-40 minute, drying and crushing, cross 300-400 mesh sieve, obtain powder；
(2) nano magnesia, perfluoro caprylic acid are carried out being mixed to join N, in N '-dimethyl Methanamide, ultrasonic 30-35 minute, drip sulfuric acid solution the most while stirring, be again heated to 80-85 DEG C of stirring reaction 20-30 minute, after terminating reaction, filtering, vacuum drying obtains fluorinated nano magnesium oxide；
(3) being mixed with nanometer polytetrafluoroethylcomposite micropowder by fluorinated nano magnesium oxide, join in chloroform, ultrasonic disperse 1-1.2h, volatilization removes chloroform, is dried to obtain nanometer powder；
(4) powder (1st) step obtained is mixed homogeneously with described nanometer powder with methyl methacrylate, nonionic borate, adds potassium peroxydisulfate mix homogeneously, obtains mixed material；
(5) mixed material (4th) step obtained and other surplus stocks, send in high-speed mixer and mix, mix homogeneously at 135-140 DEG C, then through pelletize and get final product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610223335.9A CN105801968A (en) | 2016-04-12 | 2016-04-12 | Nano-magnesia doped polyethylene direct-current cable composite with good compactness and preparation method of composite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610223335.9A CN105801968A (en) | 2016-04-12 | 2016-04-12 | Nano-magnesia doped polyethylene direct-current cable composite with good compactness and preparation method of composite |
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| CN105801968A true CN105801968A (en) | 2016-07-27 |
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| CN201610223335.9A Withdrawn CN105801968A (en) | 2016-04-12 | 2016-04-12 | Nano-magnesia doped polyethylene direct-current cable composite with good compactness and preparation method of composite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659135A (en) * | 2018-11-29 | 2019-04-19 | 天津大学 | The dc breakdown field strength method of condenser dielectric film is improved based on benzoin |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910495A (en) * | 2015-06-19 | 2015-09-16 | 国网智能电网研究院 | High-voltage direct-current cable material and preparation method thereof |
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- 2016-04-12 CN CN201610223335.9A patent/CN105801968A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910495A (en) * | 2015-06-19 | 2015-09-16 | 国网智能电网研究院 | High-voltage direct-current cable material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659135A (en) * | 2018-11-29 | 2019-04-19 | 天津大学 | The dc breakdown field strength method of condenser dielectric film is improved based on benzoin |
| CN109659135B (en) * | 2018-11-29 | 2021-01-05 | 天津大学 | Method for improving direct-current breakdown field strength of capacitor dielectric film based on benzoin |
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