CN106024230A - Modified graphene/PVDF composite PTC thermistor - Google Patents
Modified graphene/PVDF composite PTC thermistor Download PDFInfo
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- CN106024230A CN106024230A CN201610652308.3A CN201610652308A CN106024230A CN 106024230 A CN106024230 A CN 106024230A CN 201610652308 A CN201610652308 A CN 201610652308A CN 106024230 A CN106024230 A CN 106024230A
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- modified graphene
- pvdf
- ptc
- combined
- heat conduction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/027—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of electric heater production, and concretely relates to a modified graphene/PVDF composite PTC thermistor. The modified graphene/PVDF composite PTC thermistor is formed by two layers of metal foils clamping a sheet-shaped PTC core material, and the PTC core material comprises the following components in parts by mass: 28-43 wt% of a functional conductive filler, 3-6 wt% of an auxiliary agent, 2-5 wt% of modified graphene, 6-12 wt% of LLDPE, and the balance of PVDF. THE modified graphene/PVDF composite PTC thermistor has the advantages of protrude high temperature resistance and excellent conductivity.
Description
Technical field
The present invention relates to electric heater production technical field, be specifically related to a kind of modified graphene
/ PVDF is combined PTC themistor.
Background technology
General, the crystalline polymers composite filling conducting particles can show positive temperature coefficient
PTC phenomenon, say, that when relatively low temperature, this kind of conductor presents relatively low resistivity,
And arriving more than high molecular polymer fusing point when temperature raises, resistivity can raise rapidly.At present
Conventional polymeric material includes polyethylene, polypropylene, polystyrene, EVA, EAA, EBA,
Conductive filler includes white carbon black, graphite, carbon fiber, nikel powder, copper powder, aluminium powder etc..
High molecular PTC resistance is not linear relationship with the relation of temperature, but rises in temperature
Initial stage PTC change in resistance is the most little, simply becomes suddenly when temperature reaches certain value (G point) resistance
Greatly.Our G point is called flex point or curie point.When we are to G point and gathering in ptc material
Find when the physical property of compound (PE) contrasts, the fusing point of G point closely PE.Such as high density
The fusing point of polyethylene (HDPE) is at 125 DEG C ± 5 DEG C, and the fusing point of Low Density Polyethylene (LDPE) exists
115℃±5℃.And PTC G point is less than 10 DEG C with corresponding fusing point difference accordingly.Have point
Analysis thinks that PTC only just there will be resistance and rises to when its temperature reaches fusing point state.
But for the thermal resistor of electric heater, often work under conditions of exceeding room temperature.
If short circuit, then heater body steeply rises steadily, and temperature also can reach more than 110 DEG C,
The PTC now produced according to HDPE is likely to ineffective, and causes power-off.So
A kind of curie point of market demands high molecular PTC more than 250 DEG C.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of resistance to elevated temperatures and highlight, conduction
Modified graphene/the PVDF of superior performance is combined PTC themistor.
For realizing object above, the present invention is achieved by the following technical programs:
A kind of modified graphene/PVDF is combined PTC themistor, double layer of metal paillon foil press from both sides
Lamellar PTC core is had to constitute, it is characterised in that described PTC core is by following mass fraction
Component forms:
Further, described PTC core is made up of the component of following mass fraction:
Further, described modified graphene is for be modified Graphene with polyaniline or MDI.
Further, described functional conductive filler is chosen in particular from white carbon black, aluminium powder, titanium dioxide,
CNT, two or more compositions any in nickel bag graphite.
Further, described auxiliary agent specifically includes coupling agent NTC401, fire retardant aluminium hydroxide,
Fluorine-containing surfactant.
Further, described functional conductive packing material size is less than 6000 mesh.
The invention have the benefit that
1. modified graphene/PVDF that the present invention provides is combined PTC themistor electric conductivity
Good, detection sensitivity is high: Graphene surface after modified can reduce, and effectively improves Graphene
Dispersive property so that it is there is more preferable electric property；After modified graphene/PVDF is compound,
Material dielectric constant is high, conducts electricity very well, and detection sensitivity is high.
The most after testing, modified graphene/PVDF that the present invention provides is combined PTC themistor
Curie point can be stablized more than 330 DEG C, and resistance to elevated temperatures highlights, operating temperature range width, stable
Property is good, and overload capacity is strong.
3. various components are organically combined by the present invention, it is possible to effectively slow down aging of product speed
Rate, extends the service life of PTC themistor；And the thermal resistor that the present invention provides
Intensity is high, and easy fracture does not crushes.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close embodiments of the invention, the technical scheme in the embodiment of the present invention is carried out clearly and completely
Describe.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Embodiment 1:
A kind of modified graphene/PVDF is combined PTC themistor, double layer of metal paillon foil press from both sides
Having lamellar PTC core to constitute, PTC core is made up of the component of following mass fraction:
Embodiment 2:
Embodiment 3:
Embodiment 4:
The invention have the benefit that
1. modified graphene/PVDF that the present invention provides is combined PTC themistor electric conductivity
Good, detection sensitivity is high: Graphene surface after modified can reduce, and effectively improves Graphene
Dispersive property so that it is there is more preferable electric property；After modified graphene/PVDF is compound,
Material dielectric constant is high, conducts electricity very well, and detection sensitivity is high.
The most after testing, modified graphene/PVDF that the present invention provides is combined PTC themistor
Curie point can be stablized more than 330 DEG C, and resistance to elevated temperatures highlights, operating temperature range width, stable
Property is good, and overload capacity is strong.
3. various components are organically combined by the present invention, it is possible to effectively slow down aging of product speed
Rate, extends the service life of PTC themistor；And the thermal resistor that the present invention provides
Intensity is high, and easy fracture does not crushes.
Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, those of ordinary skill in the art
It is understood that the technical scheme described in foregoing embodiments still can be modified by it,
Or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, not
The essence making appropriate technical solution departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. modified graphene/PVDF is combined a PTC themistor, by double layer of metal paper tinsel
Sheet accompanies lamellar PTC core and constitutes, it is characterised in that described PTC core is divided by following quality
The component composition of number:
2. modified graphene/PVDF as claimed in claim 1 is combined PTC themistor,
It is characterized in that, described PTC core is made up of the component of following mass fraction:
3. modified graphene/PVDF as claimed in claim 1 or 2 is combined PTC temperature-sensitive electricity
Resistance device Heat Conduction Material, it is characterised in that described modified graphene is to stone with polyaniline or MDI
Ink alkene is modified.
4. modified graphene/PVDF as claimed in claim 1 or 2 is combined PTC temperature-sensitive electricity
Resistance device Heat Conduction Material, it is characterised in that described functional conductive filler is chosen in particular from white carbon black, aluminium powder,
Titanium dioxide, CNT, two or more compositions any in nickel bag graphite.
5. modified graphene/PVDF as claimed in claim 1 or 2 is combined PTC temperature-sensitive electricity
Resistance device Heat Conduction Material, it is characterised in that described auxiliary agent specifically includes coupling agent NTC401, fire-retardant
Agent aluminium hydroxide, fluorine-containing surfactant.
6. modified graphene/PVDF as claimed in claim 4 is combined PTC themistor
Heat Conduction Material, it is characterised in that described functional conductive packing material size is less than 6000 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652308.3A CN106024230A (en) | 2016-08-10 | 2016-08-10 | Modified graphene/PVDF composite PTC thermistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652308.3A CN106024230A (en) | 2016-08-10 | 2016-08-10 | Modified graphene/PVDF composite PTC thermistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106024230A true CN106024230A (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610652308.3A Pending CN106024230A (en) | 2016-08-10 | 2016-08-10 | Modified graphene/PVDF composite PTC thermistor |
Country Status (1)
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| CN (1) | CN106024230A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158176A (en) * | 2016-06-18 | 2016-11-23 | 芜湖长启炉业有限公司 | PTC resistor based on polyaniline and preparation method thereof |
| CN109755463A (en) * | 2017-11-08 | 2019-05-14 | 宁德时代新能源科技股份有限公司 | Electrode pole piece, electrochemical device and safety coating |
| CN110963492A (en) * | 2019-12-04 | 2020-04-07 | 常州市艾森塑料科技有限公司 | Preparation method of modified expanded graphite |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1254932A (en) * | 1998-11-19 | 2000-05-31 | 上海维安热电材料有限公司 | Low-resistance thermosensitive resistor and its making method |
| CN101560325A (en) * | 2009-05-26 | 2009-10-21 | 上海科特高分子材料有限公司 | High-temperature resistant PTC electroconductive composition, high-temperature resistant PTC device containing composition and manufacturing method thereof |
| CN102280233A (en) * | 2011-05-31 | 2011-12-14 | 芜湖凯龙电子科技有限公司 | High-temperature macromolecule PTC (positive temperature coefficient) thermal resistor and manufacturing method thereof |
-
2016
- 2016-08-10 CN CN201610652308.3A patent/CN106024230A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1254932A (en) * | 1998-11-19 | 2000-05-31 | 上海维安热电材料有限公司 | Low-resistance thermosensitive resistor and its making method |
| CN101560325A (en) * | 2009-05-26 | 2009-10-21 | 上海科特高分子材料有限公司 | High-temperature resistant PTC electroconductive composition, high-temperature resistant PTC device containing composition and manufacturing method thereof |
| CN102280233A (en) * | 2011-05-31 | 2011-12-14 | 芜湖凯龙电子科技有限公司 | High-temperature macromolecule PTC (positive temperature coefficient) thermal resistor and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李伟等: "石墨烯改性热固性树脂及其纤维复合材料的研究进展", 《玻璃钢/复合材料》 * |
| 胡振鹏: "改性石墨烯/聚合物复合材料的制备及其PTC行为研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158176A (en) * | 2016-06-18 | 2016-11-23 | 芜湖长启炉业有限公司 | PTC resistor based on polyaniline and preparation method thereof |
| CN106158176B (en) * | 2016-06-18 | 2018-03-27 | 芜湖长启炉业有限公司 | PTC resistor based on polyaniline and preparation method thereof |
| CN109755463A (en) * | 2017-11-08 | 2019-05-14 | 宁德时代新能源科技股份有限公司 | Electrode pole piece, electrochemical device and safety coating |
| CN109755463B (en) * | 2017-11-08 | 2020-12-29 | 宁德时代新能源科技股份有限公司 | Electrode pole piece, electrochemical device and safety coating |
| US11289748B2 (en) | 2017-11-08 | 2022-03-29 | Contemporary Amperex Technology Co., Limited | Electrode plate, electrochemical device and safety coating |
| CN110963492A (en) * | 2019-12-04 | 2020-04-07 | 常州市艾森塑料科技有限公司 | Preparation method of modified expanded graphite |
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