CN1262593C - High electricity conductive polymer composite material and its preparation method - Google Patents
High electricity conductive polymer composite material and its preparation method Download PDFInfo
- Publication number
- CN1262593C CN1262593C CN 200410014923 CN200410014923A CN1262593C CN 1262593 C CN1262593 C CN 1262593C CN 200410014923 CN200410014923 CN 200410014923 CN 200410014923 A CN200410014923 A CN 200410014923A CN 1262593 C CN1262593 C CN 1262593C
- Authority
- CN
- China
- Prior art keywords
- preparation
- graphite
- nano
- density polyethylene
- hdpe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention discloses a high electricity conductivity polymer composite material composed of high-density polyethylene and nano-graphite. The nano-graphite of the present invention has a high diameter and thickness ratio, and a small amount of nano-graphite can form an electricity conductive network in the high-density polyethylene by high-temperature mixture and refinement. The resistivity of the present invention is sharply increased along with the increase of pressure in a narrow pressure range. The present invention has a switching characteristic for blocking current. Because the material has light weight, the material has mechanical property and processing property, and the conductivity of the material is better than that of a common macromolecule electricity conductive composite material.
Description
Technical field
The present invention relates to a kind of high conductivity polymer composites that has, particularly relate to a kind of novel high conductivity polymer composites that light-weight high density polyethylene(HDPE)/nano-graphite pressure drag material makes and preparation method thereof that utilizes.
Background technology
Most polymer materialss are nonconducting, and the raising of polymer conductivity normally by adding a certain amount of electro-conductive material, connects into conductive path by conductive filler material, thereby makes polymer materials have certain electroconductibility.Conductive filler material mostly is natural graphite, expanded graphite, carbon black, acetylene black etc. in the existing technology, and conductive fill amount used in the system is big, and the percolation threshold height is bigger to the intensity and the toughness infringement of matrix material.And the matrix material of high conductive fill amount, its resistivity is very not obvious with the amplitude that the pressure rising increases.The thickness of nano-graphite is nano level, and diameter is a micron order, has high radius-thickness ratio, therefore can significantly reduce the consumption of conductive filler material, reduces the percolation threshold of system, makes material have tangible piezoresistive effect and light-weight characteristic.The resistance of crystalline polymer conducing composite material increases with the rising of temperature, presents the sudden change of the order of magnitude under certain critical temperature, this phenomenon be commonly called the resistance positive temperature coefficient effect (Positive Temperature Coefficient, PTC).Polymer-based composite conducting material have tired like effect, its resistivity increases with the increase of pressure in the certain pressure scope, may be defined as piezoresistive effect.F.Carmona, R.Canet, P.Delhaes have reported the piezoresistive effect of polymer base conductive composite material at Journalof Applied Physics1987 the 61st volume 2550-2557 page or leaf.In Journal of Applied Polymer Science2000 the 77th volume 792-796 page or leaf, reported the piezoresistive effect of high-density polyethylene/carbon ink conducing composite material, the sooty addition is greater than 37.5%, the content of conductive filler material is higher, and the amplitude that increases with the rising composite material resistance rate of pressure is not very obvious.
Existing polymer base conductive composite material is because the conductive filler material loading level is big, and material is with the rising of environmental stress, and the effect of its blocking-up electric current is also not obvious, and has caused the decline of conducing composite material mechanical property and processing characteristics.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, provide a kind of light-weight to have the high conductivity polymer composites with high pressure drag characteristic (under certain limit pressure, can effectively block electric current), high conductivity, good mechanical performance and processing characteristics.
Another object of the present invention is to provide a kind of light-weight to have the preparation method of high conductivity polymer composites.
For achieving the above object, technical solution of the present invention is:
The present invention is a kind of high conductivity polymer composites, and it is made up of the component of following weight part per-cent:
High density polyethylene(HDPE) 70-99%
Graphite 1.0-30%.
Described graphite is nano-graphite, and its radius-thickness ratio is 50-500.
A kind of preparation method of high conductivity polymer composites, its preparation method is as follows:
(1) the roller mixing roll gives heat to 135-200 ℃;
(2) begin to drop into the high density polyethylene(HDPE) of 70-99 weight part;
(3) treat high density polyethylene(HDPE) plasticizing after, add 1-30 weight part nano-graphite again;
(4) above-mentioned two mixture thin-passes are even;
(5) blanking cooling is prepared into the sheet pressure drag material.
The roller surface temperature of the two roller mixing rolls in step (1) remains on 135-150 ℃.
Be controlled at 10-20 minute in the refining time of step (2) to step (4).
A kind of preparation method of high conductivity polymer composites is characterized in that: its preparation method is as follows:
(1) forcing machine is preheated to more than 160 ℃;
(2) high density polyethylene(HDPE) and the nano-graphite with described weight percent mixes back input forcing machine, and the fusion rear haulage is extruded;
(3) with hot-forming after the high density polyethylene(HDPE)/nano-graphite matrix material granulation of extruding.
In extrusion, the head temperature of forcing machine is controlled at 135-200 ℃.
Described hot-forming temperature is 170-250 ℃.
Described hot-forming temperature is higher than the melt temperature of high density polyethylene(HDPE).After adopting such scheme, nano-graphite of the present invention has high radius-thickness ratio, by high-temperature mixing, uses more a spot of nano-graphite just can form conductive network in high density polyethylene(HDPE).Because the content of nano-graphite is few, therefore in narrower pressure range, can make the conductive path in the material be subjected to serious destruction, make resistivity of material sharply increase in a leap, thereby play the effect of blocking-up electric current.The proportion of graphite is bigger, and low nano-graphite conductive filler material content makes high density polyethylene(HDPE)/nano-graphite material have lighter weight, and has overcome filled-type conducing composite material processing rheological difference and the low problem of mechanical property.Thereby the present invention has the following advantages:
(1) in narrower pressure range, material can be blocked electric current effectively;
(2) material electroconductibility is better than general conductive polymer matrix material;
(3) material has mechanics and processing characteristics well, and weight is lighter;
(4) preparation technology is comparatively simple.
During material generation piezoresistive effect, the suffered pressure of material is uniaxial tension among the present invention.
Embodiment
1, high conductivity polymer composites of the present invention is prepared by the mixing method of two roller mixing rolls.
Embodiment 1:
Take by weighing nano-graphite 6 grams respectively, high density polyethylene(HDPE) 24 grams.Two roller mixing rolls are preheated to 135 ℃, the roller surface temperature is remained on about 140 ℃; Earlier high density polyethylene(HDPE) is dropped into roller, treat to drop into nano-graphite again after its plasticizing; Evenly thin-pass blanking cooling after 15 minutes obtains the flaky material that the surface is black.
Embodiment 2:
Take by weighing nano-graphite 7.5 grams respectively, high density polyethylene(HDPE) 22.5 grams.Two roller mixing rolls are preheated to 175 ℃, the roller surface temperature is remained on about 150 ℃; Earlier high density polyethylene(HDPE) is dropped into roller, treat to drop into nano-graphite again after its plasticizing; Evenly thin-pass blanking cooling after 20 minutes obtains the flaky material that the surface is black.
Embodiment 3:
Take by weighing nano-graphite 9 grams respectively, high density polyethylene(HDPE) 21 grams.Two roller mixing rolls are preheated to 200 ℃, the roller surface temperature is remained on about 135 ℃.Earlier high density polyethylene(HDPE) is dropped into roller, treat to drop into nano-graphite again after its plasticizing; Evenly thin-pass blanking cooling after 10 minutes obtains the flaky material that the surface is black.
Embodiment 4:
Take by weighing nano-graphite 3 grams respectively, high density polyethylene(HDPE) 27 grams.Two roller mixing rolls are preheated to 140 ℃, the roller surface temperature is remained on about 145 ℃; Earlier high density polyethylene(HDPE) is dropped into roller, treat to drop into nano-graphite again after its plasticizing; Evenly thin-pass blanking cooling after 15 minutes obtains the flaky material that the surface is black.
2, hot press molding method was prepared after high conductivity polymer composites of the present invention was extruded by forcing machine.
Embodiment 5:
Take by weighing nano-graphite 6 grams respectively, high density polyethylene(HDPE) 24 grams.Forcing machine is preheated to 170 ℃; The mixture of high density polyethylene(HDPE) and nano-graphite is dropped into forcing machine, and the fusion rear haulage is extruded; To under 180 ℃ of conditions, be hot pressed into the black flaky material after the extrudate granulation.The material volume resistivity of gained and the relation of pressure see Table 1.
| P(Psi) | 0 | 3000 | 3400 | 3800 | 4200 | 4600 | 5000 |
| ρ(kΩ.cm) | 2691.83 | 1.09E+4 | 2.12E+4 | 6.39E+4 | 2.81+E5 | 2.10+E6 | 1.53+E7 |
Table 1:
Embodiment 6:
Take by weighing nano-graphite 7.5 grams respectively, high density polyethylene(HDPE) 22.5 grams.Forcing machine is preheated to 200 ℃; The mixture of high density polyethylene(HDPE) and nano-graphite is dropped into forcing machine, and the fusion rear haulage is extruded; To under 250 ℃ of conditions, be hot pressed into the black flaky material after the extrudate granulation.The material volume resistivity of gained and the relation of pressure see Table 2.
| P(Psi) | 0 | 3400 | 3800 | 4200 | 4600 | 5000 | 5400 |
| ρ(kΩ.cm) | 1876.62 | 1.48E+4 | 2.54E+4 | 7.62E+4 | 1.97+E5 | 2.18+E6 | 1.09+E7 |
Table 2:
In the above-described embodiments nano-graphite be natural flake graphite at high temperature rapid expansion become expanded graphite, expanded graphite is carried out sonic oscillation makes nano-graphite.
Claims (8)
1, a kind of high conductivity polymer composites, it is characterized in that: it is made up of the component of following weight part per-cent:
High density polyethylene(HDPE) 70-99%
Nano-graphite 1.0-30%
Wherein, the radius-thickness ratio of nano-graphite is 50-500.
2, a kind of preparation method of high conductivity polymer composites according to claim 1, it is characterized in that: its preparation method is as follows:
(1) two roller mixing rolls is preheated to 135-200 ℃;
(2) begin to drop into the high density polyethylene(HDPE) of 70-99 weight part;
(3) treat high density polyethylene(HDPE) plasticizing after, add 1-30 weight part nano-graphite again;
(4) above-mentioned two mixture thin-passes are even;
(5) blanking cooling is prepared into the sheet pressure drag material.
3, according to the preparation method of the described high conductivity polymer composites of claim 2, it is characterized in that: the roller surface temperature of the two roller mixing rolls in the step (1) remains on 135-150 ℃.
4, according to the preparation method of the described high conductivity polymer composites of claim 2, it is characterized in that: step (2) to the refining time of step (4) was controlled at 10-20 minute.
5, a kind of preparation method of high conductivity polymer composites according to claim 1, it is characterized in that: its preparation method is as follows:
(1) forcing machine is preheated to more than 160 ℃;
(2) high density polyethylene(HDPE) and the nano-graphite with described weight percent mixes back input forcing machine, and the fusion rear haulage is extruded;
(3) with hot-forming after the high density polyethylene(HDPE)/nano-graphite matrix material granulation of extruding.
6, a kind of preparation method of high conductivity polymer composites according to claim 5 is characterized in that: in extrusion, the head temperature of forcing machine is controlled at 135-200 ℃.
7, a kind of preparation method of high conductivity polymer composites according to claim 5 is characterized in that: described hot-forming temperature is 170-250 ℃.
8, a kind of preparation method according to claim 5 or 7 described high conductivity polymer composites, it is characterized in that: described hot-forming temperature is higher than the melt temperature of high density polyethylene(HDPE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014923 CN1262593C (en) | 2004-05-13 | 2004-05-13 | High electricity conductive polymer composite material and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014923 CN1262593C (en) | 2004-05-13 | 2004-05-13 | High electricity conductive polymer composite material and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1569944A CN1569944A (en) | 2005-01-26 |
| CN1262593C true CN1262593C (en) | 2006-07-05 |
Family
ID=34478677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014923 Expired - Fee Related CN1262593C (en) | 2004-05-13 | 2004-05-13 | High electricity conductive polymer composite material and its preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1262593C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348587B (en) * | 2008-09-01 | 2011-08-03 | 武汉理工大学 | Preparation method of ultra-high molecular weight polyethylene/graphite nanoplate composite material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430338C (en) * | 2005-05-19 | 2008-11-05 | 南京理工大学 | Process for preparing polymer and graphite conductive nano composites |
-
2004
- 2004-05-13 CN CN 200410014923 patent/CN1262593C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348587B (en) * | 2008-09-01 | 2011-08-03 | 武汉理工大学 | Preparation method of ultra-high molecular weight polyethylene/graphite nanoplate composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1569944A (en) | 2005-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5436505B2 (en) | Conductive resin composition and molded body thereof | |
| WO2006072741A1 (en) | Use of carbon nanotubes for the production of a conductive organic composition and applications of one such composition | |
| CN102702634B (en) | Polystyrene porous material and preparation method thereof | |
| KR101183016B1 (en) | Carbon Nanotube-polymer Nanocomposite Improved In Electrical Conductivity And Preparation Method Thereof | |
| WO2019147895A1 (en) | Lignin-based polymers with enhanced melt extrusion ability | |
| CN101488373B (en) | preparation of conductive composite material | |
| KR101164287B1 (en) | Carbon Nanotube-polymer Nanocomposite Improved In Electrical Conductivity And Preparation Method Thereof | |
| CN1262593C (en) | High electricity conductive polymer composite material and its preparation method | |
| CN1091931C (en) | Low-resistance thermosensitive resistor and its making method | |
| CN1911650A (en) | Black-less permanent antielectro-static plastic sheet and its preparation method | |
| CN109627516A (en) | A kind of sealing ring | |
| CN1046599C (en) | Copper-plated carbon fibre metal graphite composite electric brush and making method | |
| JP5025079B2 (en) | Conductive resin composition and molded body thereof | |
| KR20140141145A (en) | Thermoplastic Resin Composition Having Excellent Conductivity and Impact Strength | |
| Zhang et al. | Antistatic behavior of PAN-based low-temperature carbonaceous fibers | |
| CN110724321A (en) | Graphene-based wear-resistant stator rubber composite material and preparation method thereof | |
| CN102702710A (en) | Composition for processing porous polycarbonate material, porous polycarbonate material and preparation method thereof | |
| CN106336544B (en) | A kind of high-performance sealed circle | |
| Huang et al. | A new ionic cross-linking network type high hysteresis oil resistant ACM/POM TPV preparation method and performance research | |
| CN109535506B (en) | Foamed conductive thermoplastic dynamic vulcanized rubber composite material and preparation method thereof | |
| CN114539711B (en) | Tough conductive composite material and preparation method thereof | |
| KR20210058849A (en) | Composition for bipolar plate and method for manufacturing same | |
| JP7460610B2 (en) | Composition for bipolar plates and method for producing said composition | |
| JP2008255256A (en) | Method of manufacturing resin molded object | |
| Das | Properties and Environmental Impacts of Sustainable Electrically Conductive Composites of Carbonized Pulp Fibers and Recycled Polyamide 12 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060705 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |