CN105504551A - Recyclable polyolefin high-thermal-conductivity cable insulating material and preparation method thereof - Google Patents
Recyclable polyolefin high-thermal-conductivity cable insulating material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a recyclable polyolefin high-thermal-conductivity cable insulating material and a preparation method thereof and belongs to the technical field of electrical equipment or electronic equipment insulation. The material is prepared in the mode that recyclable thermoplastic polyolefin is adopted as a matrix of the insulating material, high-thermal-conductivity nano-particles obtained after surface treatment are added, and a melt blending method is carried out. The mass ratio of thermoplastic polyolefin to the high-thermal-conductivity nano-particles is 95:5-80:20. The method includes the steps that polyolefin, the high-thermal-conductivity nano-particles obtained after surface treatment, antioxygen, flame retardant and a processing agent are mixed for 10-15 min in an internal mixer at a certain temperature at the rotating speed of 40-60 r/min, and the recyclable polyolefin high-thermal-conductivity cable insulating material is prepared. The high-thermal-conductivity nano-particles are added, so that the thermal conductivity of the matrix material is improved. The insulating material has high thermal conductivity, keeps excellent electrical performance, can be recycled after reaching the designed service life, and does not damage the environment.
Description
Technical field
The invention belongs to electric installation or electronics insulation technology field, be specifically related to a kind of callable polyolefine height heat conduction cable insulation material and preparation method thereof.
Background technology
Direct current cables technology of transmission of electricity has a lot of advantage relative to other power transmission modes, can save a large amount of land resources, without security of system problem, nothing cascading failure risk on a large scale.Simultaneously along with the development of distributed new generating, HVDC Transmission Technology particularly direct current cables technology of transmission of electricity will be widely adopted.
Traditional extrusion type plastics direct current cables generally adopts crosslinked polyethylene as cable insulation material, but crosslinked polyethylene is a kind of thermosetting material, work-ing life to after date cannot recycling and be difficult to degraded, a large amount of pollution can be caused to environment.Simultaneously crosslinked polyethylene needs to carry out crosslinked and degassed process in process of production, and the treating processes cycle is longer and can produce harmful by-products, lot of energy simultaneously.Therefore be necessary to develop a kind of novel recyclable cable insulation material, to improve the environment friendly of cable insulation material.
Direct current cables is due to heart yearn heating meeting formation temperature Gradient distribution in cable insulation in operational process simultaneously, makes near inner conductor portion temperature higher, lower near cable outer surface part temperature.Electric field distribution in direct current cables insulation layer depends on resistivity and the geometry of insulation layer, because the resistivity of macromolecule polymer material can reduce with temperature rising, thus make direct current cables lower near inner conductor portion strength of electric field in normal course of operation, higher near cable outer surface part strength of electric field, namely in direct current cables operational process due to field inversion phenomenon that change in resistance causes.This field inversion phenomenon can have a strong impact on normal operation and the working life of direct current cables, brings difficulty to the insulating structure design of direct current cables simultaneously.In order to address this problem, need the thermal conductivity improving direct current cables insulating material, thus make the temperature distribution in direct current cables insulation layer more even, reduce the temperature head of insulation layer surfaces externally and internally, thus suppress the change in resistance because temperature variation causes and strength of electric field change.The application of callable High-heat-conductiviinsulation insulation material simultaneously is also not only confined to direct current cables insulating material, also can be applied to the insulating material of electronics or other electric installations.By the heat dissipation problem that the thermal conductivity improving insulating material is brought to improve electronics or electric installation miniaturization, improve serviceability and the working life of equipment.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of callable polyolefine height heat conduction cable insulation material and preparation method thereof is proposed, this material adopts callable TPO as the matrix of insulating material, add the surface treated nano particle with high heat conductance to improve the heat conductivility of body material simultaneously, adopt this preparation method effectively to improve the thermal conductivity of material, maintain excellent electric property simultaneously.
The one callable polyolefine height heat conduction cable insulation material that the present invention proposes, this material adopts callable TPO as the matrix of insulating material, adds the surface treated nano particle with high heat conductance simultaneously and be prepared from by melt-blending process.
Wherein, described TPO is 95:5 ~ 80:20 with the mass ratio of the nano particle with high heat conductance; Described TPO is the one of polyethylene, polypropylene or ethylene propylene copolymer; The described nano particle with high heat conductance is the one of boron nitride, aluminium nitride, aluminum oxide, silicon carbide or silicon nitride, and the particle diameter of nano particle is 30 ~ 80nm.
The method of the above-mentioned callable polyolefine height heat conduction cable insulation material of preparation that the present invention proposes, specifically comprises the steps:
(1) nano particle and 5 parts of silane coupling agents 2.5 parts with high heat conductance join in 100 parts of toluene solutions, and then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtain suspension liquid;
(2) suspension liquid that step (1) obtains is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, be precipitated thing, by this throw out in vacuum drying oven at 80 DEG C dry 24 hours, obtain the surface treated nano particle with high heat conductance;
(3) mutually mixed by surface treated nano particle, oxidation inhibitor, fire retardant and the processing aid with high heat conductance obtained in TPO, step (2), the massfraction of each component is respectively:
(4) mixture step (3) mixed melt blending at a certain temperature in Banbury mixer, rotating speed is 40 ~ 60r/min, mixing 10 ~ 15 minutes, obtains callable polyolefine height heat conduction cable insulation material.
Described silane coupling agent is the one of 3-aminopropyl triethoxysilane, 3-glycidyl ether oxygen propyl trimethoxy silicane, 3-methacryloxypropyl trimethoxy silane or n-octytriethoxysilane.
Described oxidation inhibitor is the one of antioxidant 1010, antioxidant 2246 or antioxidant 264.
Described fire retardant is the one of magnesium hydroxide, low-hydrate zinc borate, aluminium hydroxide or antimonous oxide.
Described processing aid is lubricant stearic acid glyceryl ester.
Described certain temperature is more than thermoplastic olefin material fusing point used 10 ~ 50 DEG C.
Callable polyolefine height heat conduction cable insulation material that the present invention proposes and preparation method thereof, its feature and beneficial effect are:
The callable polyolefine height heat conduction cable insulation material utilizing the present invention to prepare, have employed TPO as body material in preparation process, can recycling after the life-span expires, and is conducive to protection of the environment.With the addition of the surface treated nano particle with high heat conductance, effectively improve the thermal conductivity of material, maintain excellent electric property simultaneously.
Callable polyolefine height heat conduction cable insulation material prepared by the inventive method, mainly should in the insulating material, particularly high-voltage DC cable insulating material of electronics and power equipment.
Embodiment
The one callable polyolefine height heat conduction cable insulation material that the present invention proposes, this material adopts callable TPO as the matrix of insulating material, adds the surface treated nano particle with high heat conductance simultaneously and be prepared from by melt-blending process.
Wherein, described TPO is 95:5 ~ 80:20 with the mass ratio of the nano particle with high heat conductance; Described TPO is the one of polyethylene, polypropylene or ethylene propylene copolymer; The described nano particle with high heat conductance is the one of boron nitride, aluminium nitride, aluminum oxide, silicon carbide or silicon nitride, and the particle diameter of nano particle is 30 ~ 80nm.
The method of the above-mentioned callable polyolefine height heat conduction cable insulation material of preparation that the present invention proposes, specifically comprises the steps:
(1) nano particle and 5 parts of silane coupling agents 2.5 parts with high heat conductance join in 100 parts of toluene solutions, and then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtain suspension liquid;
(2) suspension liquid that step (1) obtains is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, be precipitated thing, by this throw out in vacuum drying oven at 80 DEG C dry 24 hours, obtain the surface treated nano particle with high heat conductance;
(3) mutually mixed by surface treated nano particle, oxidation inhibitor, fire retardant and the processing aid with high heat conductance obtained in TPO, step (2), the massfraction of each component is respectively:
(4) mixture step (3) mixed melt blending at a certain temperature in Banbury mixer, rotating speed is 40 ~ 60r/min, mixing 10 ~ 15 minutes, obtains callable polyolefine height heat conduction cable insulation material.
Described silane coupling agent is the one of 3-aminopropyl triethoxysilane, 3-glycidyl ether oxygen propyl trimethoxy silicane, 3-methacryloxypropyl trimethoxy silane or n-octytriethoxysilane.
Described oxidation inhibitor is the one of antioxidant 1010, antioxidant 2246 or antioxidant 264.
Described fire retardant is the one of magnesium hydroxide, low-hydrate zinc borate, aluminium hydroxide or antimonous oxide.
Described processing aid is lubricant stearic acid glyceryl ester.
Described certain temperature is more than polyolefine material fusing point used 10 ~ 50 DEG C.
The present invention will be described in more details technical scheme by the following specific embodiments, but the present invention is not limited to case study on implementation proposed below.
Embodiment 1:
(1) join in 200 grams of toluene solutions by 5 grams of aluminum nitride nanometer particles and 10 grams of n-octytriethoxysilane, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated aluminum nitride nanometer particle;
(3) by the ethylene propylene copolymer (fusing point 140 DEG C) of 47.5 grams, 2.5 grams of diameters are the surface treated aluminum nitride nanometer particle of 50 nanometers, 0.25 gram of antioxidant 1010,1 gram of fire retardant magnesium hydroxide and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 180 DEG C, and rotating speed is 60r/min, mixing 15 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.Its thermal conductivity, disruptive strength, volume specific resistance are as following table.
The callable polyolefine height heat conduction cable insulation material that the above-mentioned embodiment of the present invention obtains, under this material normal temperature, thermal conductivity is 0.17W/mK, adds 13.3% relative to the thermal conductivity 0.15W/mK of body material.There is very high disruptive strength and volume specific resistance and very low dielectric loss simultaneously.
Embodiment 2
(1) join in 200 grams of toluene solutions by 5 grams of boron nitride nanometer particles and 10 grams of 3-aminopropyl triethoxysilanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated boron nitride nanometer particle;
(3) by the ethylene propylene copolymer (fusing point 140 DEG C) of 47.5 grams, 2.5 grams of diameters are the surface treated boron nitride nanometer particle of 40 nanometers, 0.25 gram of antioxidant 264,1 gram of fire retardant low-hydrate zinc borate and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 150 DEG C, and rotating speed is 40r/min, mixing 15 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 3
(1) join in 200 grams of toluene solutions by 5 grams of aluminum oxide nanoparticles and 10 grams of 3-glycidyl ether oxygen propyl trimethoxy silicanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated aluminum oxide nanoparticle;
(3) by the ethylene propylene copolymer (fusing point 140 DEG C) of 40 grams, 7.5 grams of diameters are the surface treated aluminum oxide nanoparticle of 30 nanometers, 0.3 gram of antioxidant 2246,1.5 grams of fire retardant aluminium hydroxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 180 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 4
(1) join in 200 grams of toluene solutions by 5 grams of nanometer silicon carbide particles and 10 grams of 3-methacryloxypropyl trimethoxy silane, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated nanometer silicon carbide particle;
(3) by the ethylene propylene copolymer (fusing point 140 DEG C) of 45 grams, 5 grams of diameters are the surface treated nanometer silicon carbide particle of 80 nanometers, 0.4 gram of antioxidant 1010,2 grams of fire retardant antimonous oxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 190 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 5
(1) join in 200 grams of toluene solutions by 5 grams of silicon nitride nano particles and 10 grams of 3-glycidyl ether oxygen propyl trimethoxy silicanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated silicon nitride nano particles;
(3) by the ethylene propylene copolymer (fusing point 130 DEG C) of 42.5 grams, 10 grams of diameters are the surface treated silicon nitride nano particles of 60 nanometers, 0.5 gram of antioxidant 2246,2.5 grams of fire retardant aluminium hydroxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 180 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 6:
(1) join in 200 grams of toluene solutions by 5 grams of aluminum nitride nanometer particles and 10 grams of n-octytriethoxysilane, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated aluminum nitride nanometer particle;
(3) by the polypropylene (fusing point 160 DEG C) of 47.5 grams, 2.5 grams of diameters are the surface treated aluminum nitride nanometer particle of 40 nanometers, 0.25 gram of antioxidant 1010,1 gram of fire retardant magnesium hydroxide and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 200 DEG C, and rotating speed is 60r/min, mixing 15 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 7
(1) join in 200 grams of toluene solutions by 5 grams of boron nitride nanometer particles and 10 grams of 3-aminopropyl triethoxysilanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated boron nitride nanometer particle;
(3) by the polypropylene (fusing point 160 DEG C) of 47.5 grams, 2.5 grams of diameters are the surface treated boron nitride nanometer particle of 30 nanometers, 0.25 gram of antioxidant 264,1 gram of fire retardant low-hydrate zinc borate and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 170 DEG C, and rotating speed is 40r/min, mixing 15 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 8
(1) join in 200 grams of toluene solutions by 5 grams of aluminum oxide nanoparticles and 10 grams of 3-glycidyl ether oxygen propyl trimethoxy silicanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated aluminum oxide nanoparticle;
(3) by the polypropylene (fusing point 160 DEG C) of 40 grams, 7.5 grams of diameters are the surface treated aluminum oxide nanoparticle of 80 nanometers, 0.3 gram of antioxidant 2246,1.5 grams of fire retardant aluminium hydroxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 200 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 9
(1) join in 200 grams of toluene solutions by 5 grams of nanometer silicon carbide particles and 10 grams of 3-methacryloxypropyl trimethoxy silane, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated nanometer silicon carbide particle;
(3) by the polypropylene (fusing point 160 DEG C) of 45 grams, 5 grams of diameters are the surface treated nanometer silicon carbide particle of 60 nanometers, 0.4 gram of antioxidant 1010,2 grams of fire retardant antimonous oxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 210 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 10
(1) join in 200 grams of toluene solutions by 5 grams of silicon nitride nano particles and 10 grams of 3-glycidyl ether oxygen propyl trimethoxy silicanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated silicon nitride nano particles;
(3) by the polypropylene (fusing point 160 DEG C) of 42.5 grams, 10 grams of diameters are the surface treated silicon nitride nano particles of 50 nanometers, 0.5 gram of antioxidant 2246,2.5 grams of fire retardant aluminium hydroxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 205 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 11:
(1) join in 200 grams of toluene solutions by 5 grams of aluminum nitride nanometer particles and 10 grams of n-octytriethoxysilane, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated aluminum nitride nanometer particle;
(3) by the polyethylene (fusing point 120 DEG C) of 47.5 grams, 2.5 grams of diameters are the surface treated aluminum nitride nanometer particle of 30 nanometers, 0.25 gram of antioxidant 1010,1 gram of fire retardant magnesium hydroxide and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 160 DEG C, and rotating speed is 60r/min, mixing 15 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 12
(1) join in 200 grams of toluene solutions by 5 grams of boron nitride nanometer particles and 10 grams of 3-aminopropyl triethoxysilanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated boron nitride nanometer particle;
(3) by the polyethylene (fusing point 120 DEG C) of 47.5 grams, 2.5 grams of diameters are the surface treated boron nitride nanometer particle of 80 nanometers, 0.25 gram of antioxidant 264,1 gram of fire retardant low-hydrate zinc borate and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 130 DEG C, and rotating speed is 40r/min, mixing 15 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 13
(1) join in 200 grams of toluene solutions by 5 grams of aluminum oxide nanoparticles and 10 grams of 3-glycidyl ether oxygen propyl trimethoxy silicanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated aluminum oxide nanoparticle;
(3) by the polyethylene (fusing point 120 DEG C) of 40 grams, 7.5 grams of diameters are the surface treated aluminum oxide nanoparticle of 60 nanometers, 0.3 gram of antioxidant 2246,1.5 grams of fire retardant aluminium hydroxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 160 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 14
(1) join in 200 grams of toluene solutions by 5 grams of nanometer silicon carbide particles and 10 grams of 3-methacryloxypropyl trimethoxy silane, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated nanometer silicon carbide particle;
(3) by the polyethylene (fusing point 120 DEG C) of 45 grams, 5 grams of diameters are the surface treated nanometer silicon carbide particle of 50 nanometers, 0.4 gram of antioxidant 1010,2 grams of fire retardant antimonous oxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 170 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Embodiment 15
(1) join in 200 grams of toluene solutions by 5 grams of silicon nitride nano particles and 10 grams of 3-glycidyl ether oxygen propyl trimethoxy silicanes, then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtains a kind of suspension liquid;
(2) this suspension liquid above-mentioned is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, to be precipitated this throw out in vacuum drying oven at 80 DEG C dry 24 hours after thing, to obtain surface treated silicon nitride nano particles;
(3) by the polyethylene (fusing point 120 DEG C) of 42.5 grams, 10 grams of diameters are the surface treated silicon nitride nano particles of 40 nanometers, 0.5 gram of antioxidant 2246,2.5 grams of fire retardant aluminium hydroxides and 0.5 gram of processing aid stearin mix mutually, obtain a kind of mixture;
(4) by said mixture melt blending in Banbury mixer, processing temperature is 150 DEG C, and rotating speed is 50r/min, mixing 10 minutes, obtains a kind of callable polyolefine height heat conduction cable insulation material.
Claims (9)
1. a callable polyolefine height heat conduction cable insulation material, it is characterized in that, this material adopts callable TPO as the matrix of insulating material, add the surface treated nano particle with high heat conductance to be prepared from by melt-blending process, described TPO is 95:5 ~ 80:20 with the mass ratio of the nano particle with high heat conductance simultaneously.
2. callable polyolefine height heat conduction cable insulation material as claimed in claim 1, it is characterized in that, described TPO is the one of polyethylene, polypropylene or ethylene propylene copolymer.
3. callable polyolefine height heat conduction cable insulation material as claimed in claim 1 or 2, it is characterized in that, the described nano particle with high heat conductance is the one of boron nitride, aluminium nitride, aluminum oxide, silicon carbide or silicon nitride, and the particle diameter of nano particle is 30 ~ 80nm.
4. a preparation method for callable polyolefine height heat conduction cable insulation material, it is characterized in that, the method comprises the steps:
(1) nano particle and 5 parts of silane coupling agents 2.5 parts with high heat conductance join in 100 parts of toluene solutions, and then oil bath is heated to 120 DEG C, stirring reaction 12 hours condensing reflux, obtain suspension liquid;
(2) suspension liquid that step (1) obtains is put into whizzer with the rotating speed of 6000 revs/min centrifugal 6 minutes, be precipitated thing, by this throw out in vacuum drying oven at 80 DEG C dry 24 hours, obtain the surface treated nano particle with high heat conductance;
(3) mutually mixed by surface treated nano particle, oxidation inhibitor, fire retardant and the processing aid with high heat conductance obtained in TPO, step (2), the massfraction of each component is respectively:
(4) mixture step (3) mixed melt blending at a certain temperature in Banbury mixer, rotating speed is 40 ~ 60r/min, mixing 10 ~ 15 minutes, obtains callable polyolefine height heat conduction cable insulation material.
5. preparation method as claimed in claim 4, it is characterized in that, wherein said silane coupling agent is the one of 3-aminopropyl triethoxysilane, 3-glycidyl ether oxygen propyl trimethoxy silicane, 3-methacryloxypropyl trimethoxy silane or n-octytriethoxysilane.
6. preparation method as claimed in claim 4, it is characterized in that, wherein said oxidation inhibitor is the one of antioxidant 1010, antioxidant 2246 or antioxidant 264.
7. preparation method as claimed in claim 4, it is characterized in that, wherein said fire retardant is the one of magnesium hydroxide, low-hydrate zinc borate, aluminium hydroxide or antimonous oxide.
8. preparation method as claimed in claim 4, it is characterized in that, wherein said processing aid is lubricant stearic acid glyceryl ester.
9. preparation method as claimed in claim 4, is characterized in that, wherein said certain temperature is more than polyolefine material fusing point used 10 ~ 50 DEG C.
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