CN1325550C - Heat conducting composite material of polyethylene in high density, rpeparation method and application thereof - Google Patents
Heat conducting composite material of polyethylene in high density, rpeparation method and application thereof Download PDFInfo
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- CN1325550C CN1325550C CNB2005100207008A CN200510020700A CN1325550C CN 1325550 C CN1325550 C CN 1325550C CN B2005100207008 A CNB2005100207008 A CN B2005100207008A CN 200510020700 A CN200510020700 A CN 200510020700A CN 1325550 C CN1325550 C CN 1325550C
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Abstract
The present invention discloses heat conduction composite materials of high-density polyethylene, and the present invention also relates to a preparation method and application thereof. The present invention is characterized in that the high-density polyethylene is irradiated by using gamma rays or cathode beams, and polar groups containing oxygen are introduced in molecular chains. 100 to 5 parts by weight of irradiated high-density polyethylene, 0 to 95 parts by weight of high-density polyethylene and 40 to 400 parts by weight of heat conduction inorganic filling treated by resin acceptor of which the contents account for 0.5 to 2.5% of contents of the inorganic filling are commonly blended so as to generate hydrogen bonding or chemical reaction. Thus, the tensile strength and the notch impact strength of common blending materials are conspicuously improved, and simultaneously, the common blending materials have favorable heat conduction performance. The heat conduction composite materials are used for electronic electric equipment, office equipment, etc. which have higher heat conduction requirements, and enhancing the heat radiation efficiency of the electronic equipment and the office equipment.
Description
One, technical field
The present invention relates to a kind of high density polyethylene(HDPE) heat-conductive composite material and its production and use, belong to field of high polymer material processing.
Two, background technology
Traditional thermally conductive material mostly is metal (as iron, copper, aluminium) and metal oxide (as aluminium sesquioxide, magnesium oxide) and other non-metallic material (as graphite, carbon black, boron nitride, aluminium nitride).Common high molecular materials, poor as the heat conductivity of polyolefine, polycarbonate, polyester, polymeric amide etc., belong to the poor conductor of heat, conduct heat and the application of heat radiation occasion is very limited at needs.In order to improve the heat conductivility of macromolecular material, adopt the metal of high thermal conductivity or inorganic heat conductive filler and macromolecular material to carry out blend usually.The thermal conductivity of blended compound material can reach tens times even 100 times of base resin, and has the not available advantage of many traditional thermally conductive materials, for example: the occasion that need to be used to heat conduction and electrical isolation; Adjust the thermal conductivity of material as required; Adopt the method moulding of mold pressing or injection moulding, easy to process, the production efficiency height, production cost is low.The application of heat-conducting plastic is very extensive, and it can alternative metals, metal alloy and stupalith be as heat exchanger, also can be applied in the electric industry, as circuit card, electric appliance casing etc.Along with the Highgrade integration of unicircuit and electronic component, there is the demand of the fitment material of excellent heat dispersion performance to heighten, thermally conductive material has wide development prospect.
The thermal conductivity of heat conductive filler and add-on thereof are the principal elements that influences the final heat conductivility of matrix material, other influence factor also has the thermal conductivity of macromolecular material itself, the shape of filler and particle diameter, the interfacial adhesion between the dispersiveness of filler and filler and the base material etc.Because the consistency between polyolefine and the mineral filler is relatively poor, add after the heat conductive filler, although the thermal conductivity of matrix material increases, cause the mechanical properties decrease of co-mixing system simultaneously, the consistency of therefore improving between polyolefine and the mineral filler is to improve the key of co-mixing system mechanical property.The patent of invention ZL97107322.8 that we have obtained China Patent Right " adopts irradiation technique to prepare the method for high strength, high toughness and high density polyethylene material ", method by the irradiation increase-volume, improved inorganic particulate dispersed in polyethylene and the interfacial interaction of system is strengthened, reached and strengthen toughness reinforcing effect.The present invention is the improvement and the innovation of this patent work.
Three, summary of the invention
The objective of the invention is provides a kind of high density polyethylene(HDPE) heat-conductive composite material and its production and use at the deficiencies in the prior art.Be characterized in adopting gamma-rays or electron beam that high density polyethylene(HDPE) is carried out irradiation, introducing contains the oxygen polar group on its molecular chain; Have after the mineral filler of heat conductivility and coupling agent carry out surface treatment, carry out blend generation hydrogen bonding or chemical reaction with the irradiation high density polyethylene(HDPE) again, the tensile strength and the notched Izod impact strength of co-mixing system all are significantly increased; Simultaneously, has good heat-conducting.
Purpose of the present invention is realized that by following technical measures wherein said raw material umber is parts by weight except that specified otherwise.
The recipe ingredient of high density polyethylene(HDPE) heat-conductive composite material is by weight:
0～95 part of high density polyethylene(HDPE), 100～5 parts of irradiation high density polyethylene(HDPE)s, 40～400 parts of heat conduction inorganic fillers, coupling agent content accounts for 0.5%～2.5% of inorganic filler content;
Heat conduction inorganic filler be in aluminium sesquioxide, silicon-dioxide or the magnesium oxide any one.
Coupling agent be in γ-An Bingjisanyiyangjiguiwan, N-β-(aminoethyl)-γ-An Bingjisanjiayangjiguiwan, N-β-(aminoethyl)-γ aminopropyl methyl dimethoxysilane or γ-(many ethylenes amino) propyl trimethoxy silicane any one.
The preparation method of high density polyethylene(HDPE) heat-conductive composite material:
(1) preparation of gamma-radiation irradiation high density polyethylene(HDPE) and electron beam irradiation high density polyethylene(HDPE)
Adopt
60Co gamma-radiation source or electron electrostatic accelerator at room temperature carry out irradiation to high density polyethylene(HDPE) in the air, and irradiation dose is 5～60kGy, the oxy radicals such as (C=O) of carbonylate on its molecular chain;
(2) processing of heat conduction inorganic filler
In 100 parts of heat conduction inorganic fillers, add 0.5～2.5 part of coupling agent, adopt high-speed mixer to mix oven dry after 30～60 minutes;
(3) preparation of high density polyethylene(HDPE) heat-conductive composite material
With 0～95 part of high density polyethylene(HDPE), 100～5 parts of irradiation high density polyethylene(HDPE)s, 40～400 parts of heat conduction inorganic fillers, add in two roller mills, in mixing 8～15 minutes of 150～165 ℃ of temperature, obtain the high density polyethylene(HDPE) heat-conductive composite material.
Matrix material of the present invention, tensile strength and shock strength are improved simultaneously, also have good heat-conducting.Test result shows: compare with high density polyethylene(HDPE), through the high density polyethylene(HDPE) heat-conductive composite material of modification, it is about 30% that its tensile strength has improved, and it is about 55% that shock strength improves, and thermal conductivity has improved 243%, detailed being shown in Table 1.
That the present invention is used for is electric, heat conductive insulating plate, heat conduction circuit card, computer circuit board and heat exchange material.
The present invention has following advantage:
Technology is simple, and is easy and simple to handle, and cost is lower, and prepared matrix material has excellent comprehensive performances.
Four, embodiment
Below by embodiment the present invention is carried out concrete description; be necessary to be pointed out that at this following examples can only be 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 can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment:
1, adopt JJ-2 type electrostatic accelerator, at room temperature in the air, high density polyethylene(HDPE) is carried out irradiation, irradiation dose is 30kGy.In 1000 gram silicon-dioxide, add 15 gram N-β-(aminoethyl)-γ-An Bingjisanjiayangjiguiwans, adopt high-speed mixer to mix oven dry after 30 minutes.With high density polyethylene(HDPE) 75 grams, irradiation high density polyethylene(HDPE) (30kGy) 25 grams, silica 1 00 gram, it is mixing to adopt two roller mills to carry out, 165 ℃ of melting temperatures, mixing time 8 minutes obtains high density polyethylene(HDPE) thermal conductivity matrix material.
2, adopt right cylinder formula Co
60Gamma ray projector at room temperature in the air, carries out irradiation to high density polyethylene(HDPE), and irradiation dose is 40kGy.In 1000 gram aluminium sesquioxides, add 20 gram γ-An Bingjisanyiyangjiguiwans, adopt high-speed mixer to mix oven dry after 40 minutes.With high density polyethylene(HDPE) 80 grams, irradiation high density polyethylene(HDPE) (40kGy) 20 grams, aluminium sesquioxide 180 grams, it is mixing to adopt two roller mills to carry out, 160 ℃ of melting temperatures, mixing time 10 minutes obtains high density polyethylene(HDPE) thermal conductivity matrix material.
3, adopt JJ-2 type electrostatic accelerator, at room temperature in the air, high density polyethylene(HDPE) is carried out irradiation, irradiation dose is 30kGy.In 1000 gram magnesium oxide, add 20 gram N-β-(aminoethyl)-γ aminopropyl methyl dimethoxysilanes, adopt high-speed mixer to mix oven dry after 45 minutes.With high density polyethylene(HDPE) 70 grams, irradiation high density polyethylene(HDPE) (30kGy) 30 grams, magnesium oxide 278 grams, it is mixing to adopt two roller mills to carry out, 165 ℃ of melting temperatures, mixing time 12 minutes obtains high density polyethylene(HDPE) thermal conductivity matrix material.
4, adopt right cylinder formula Co
60Gamma ray projector at room temperature in the air, carries out irradiation to high density polyethylene(HDPE), and irradiation dose is 5kGy.Add 9 gram γ-(many ethylenes amino) propyl trimethoxy silicanes at 1000 gram magnesium oxide, adopt high-speed mixer to mix oven dry after 60 minutes.With irradiation high density polyethylene(HDPE) (5kGy) 100 grams, aluminum oxide 400 grams, it is mixing to adopt two roller mills to carry out, 160 ℃ of melting temperatures, mixing time 15 minutes obtains high density polyethylene(HDPE) thermal conductivity matrix material.
5, adopt right cylinder formula Co
60Gamma ray projector at room temperature in the air, carries out irradiation to high density polyethylene(HDPE), and irradiation dose is 60kGy.Add 5 gram γ-An Bingjisanyiyangjiguiwans at 1000 gram magnesium oxide, adopt high-speed mixer to mix oven dry after 60 minutes.With high density polyethylene(HDPE) 80 grams, irradiation high density polyethylene(HDPE) (60kGy) 20 grams, aluminum oxide 40 grams, it is mixing to adopt two roller mills to carry out, 150 ℃ of melting temperatures, mixing time 8 minutes obtains high density polyethylene(HDPE) thermal conductivity matrix material.
The performance of table 1 high density polyethylene(HDPE) heat-conductive composite material of the present invention
| Sample | Tensile strength (MPa) | Izod notched Izod impact strength (kJ/m 2) | Thermal conductivity (W/m.K) |
| High density polyethylene(HDPE) modification 1 modification 2 modifications 3 of the present invention of the present invention of the present invention | 26.3 29.8 32.4 34.1 | 23.2 32.8 35.9 31.9 | 0.46 0.82 1.14 1.58 |
Claims (4)
1, a kind of high density polyethylene(HDPE) heat-conductive composite material, the recipe ingredient that it is characterized in that this heat-conductive composite material is by weight: 0～95 part of high density polyethylene(HDPE), 100～5 parts of irradiation high density polyethylene(HDPE)s, 40～400 parts of heat conduction inorganic fillers, coupling agent content accounts for 0.5%～2.5% of inorganic filler content
Wherein heat conduction inorganic filler is any one in aluminium sesquioxide, silicon-dioxide or the magnesium oxide.
2,, it is characterized in that the used coupling agent of heat-conductive composite material is any one of γ-An Bingjisanyiyangjiguiwan, N-β-(aminoethyl)-γ-An Bingjisanjiayangjiguiwan, N-β-(aminoethyl)-γ aminopropyl methyl dimethoxysilane or γ-(many ethylenes amino) propyl trimethoxy silicane according to the described high density polyethylene(HDPE) heat-conductive composite material of claim 1.
3, according to the preparation method of claim 1 or 2 described high density polyethylene(HDPE) heat-conductive composite materials, it is characterized in that:
A. the preparation of gamma-radiation irradiation high density polyethylene(HDPE) or electron beam irradiation high density polyethylene(HDPE)
Adopt
60Co gamma-radiation source or electron electrostatic accelerator at room temperature carry out irradiation to high density polyethylene(HDPE) in the air, and irradiation dose is 5～60kGy, introduces oxy radical on its molecular chain;
B. the processing of heat conduction inorganic filler
In heat conduction inorganic filler 100 weight parts, add coupling agent 0.5～2.5 weight part, adopt high-speed mixer to mix oven dry after 30～60 minutes;
C. the preparation of high density polyethylene(HDPE) heat-conductive composite material
With heat conduction inorganic filler 40～400 weight parts after high density polyethylene(HDPE) 0～95 weight part, irradiation high density polyethylene(HDPE) 100～5 weight parts, the processing, add in two roller mills, descended mixing 8～15 minutes for 150～165 ℃ in temperature, make the high density polyethylene(HDPE) heat-conductive composite material.
4,, it is characterized in that this heat-conductive composite material is used for electric, heat conductive insulating plate, heat conduction circuit card, computer circuit board and heat exchange material according to the purposes of the described high density polyethylene(HDPE) heat-conductive composite material of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100207008A CN1325550C (en) | 2005-04-13 | 2005-04-13 | Heat conducting composite material of polyethylene in high density, rpeparation method and application thereof |
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| CNB2005100207008A CN1325550C (en) | 2005-04-13 | 2005-04-13 | Heat conducting composite material of polyethylene in high density, rpeparation method and application thereof |
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| CN1687207A CN1687207A (en) | 2005-10-26 |
| CN1325550C true CN1325550C (en) | 2007-07-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102311568B (en) * | 2011-04-27 | 2014-01-22 | 深圳市科聚新材料有限公司 | Heat-conducting high density polyethylene composite material and preparation method as well as application thereof |
| CN103087389B (en) * | 2013-01-31 | 2015-06-10 | 合肥工业大学 | High-heat-conductivity high-toughness composite material and preparation method thereof |
| CN109762226A (en) * | 2018-12-06 | 2019-05-17 | 中核同辐（长春）辐射技术有限公司 | Composite heat conducting material and its preparation method and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188116A (en) * | 1997-01-17 | 1998-07-22 | 四川联合大学 | Method for preparing high strength, high toughness and high density polyethylene material using irradiation technique |
| CN1400240A (en) * | 2001-07-31 | 2003-03-05 | 四川大学 | Preparation method of polyethylene material with high strength, high toughness and high density |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188116A (en) * | 1997-01-17 | 1998-07-22 | 四川联合大学 | Method for preparing high strength, high toughness and high density polyethylene material using irradiation technique |
| CN1400240A (en) * | 2001-07-31 | 2003-03-05 | 四川大学 | Preparation method of polyethylene material with high strength, high toughness and high density |
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| CN1687207A (en) | 2005-10-26 |
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