CN106158177A - A kind of PTC macromolecular thermosensitive resistor material and preparation method thereof - Google Patents
A kind of PTC macromolecular thermosensitive resistor material and preparation method thereof Download PDFInfo
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- CN106158177A CN106158177A CN201610531505.XA CN201610531505A CN106158177A CN 106158177 A CN106158177 A CN 106158177A CN 201610531505 A CN201610531505 A CN 201610531505A CN 106158177 A CN106158177 A CN 106158177A
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- graphene
- thermosensitive resistor
- resistor material
- antioxidant
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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
- H01C7/022—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 mainly consisting of non-metallic substances
-
- 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
Abstract
The invention discloses a kind of PTC macromolecular thermosensitive resistor material, comprise the component of following weight portion: the crystal type high molecular polymer of 30～50 weight portions；The Graphene of 1～5 weight portions, the carbon black of 10～30 weight portions；The non-conducting filler of 10～30 weight portions, the antioxidant of 0.5～1 weight portion；Prepared by employing following methods: mixed by the mentioned component of predetermined ratio, obtain mixture；Then described mixture is carried out extruding pelletization, in order to obtain pellet；Described pellet is carried out that hot pressing is compound i.e. can get described PTC macromolecular thermosensitive resistor material.The PTC macromolecular thermosensitive resistor material of the present invention has the advantages that internal resistance is low, oxidative resistance good, electric conductivity is good and with low cost.
Description
Technical field
The present invention relates to thermistor material technical field, be specially a kind of PTC macromolecular thermosensitive resistor material and system thereof
Preparation Method.
Background technology
There is the conducing composite material of positive temperature coefficient (PTC) characteristic due to its fast reactivity to distinct temperature, mesh
Before be widely used on overcurrent protection assemble.The polymer-based conducing composite material with ptc characteristics is (following
Be called for short ptc material), it is common that by the raw materials melt such as high molecular polymer, conducting particles, inorganic filler and other auxiliary agents be blended and
Become.Existing mature technology use more the non-conducting fillers such as white carbon black, graphite, carbon fiber, nikel powder carry out the preparation of ptc material,
But still there is its shortcoming that each cannot overcome.
The polymer-based semistor of overcurrent protection requires to have that resistance is low, has good stability, action
The feature such as rapidly, and use white carbon black, graphite, carbon fiber etc. to do its internal resistance of PTC-element of non-conducting filler generally in tens milliohms,
The overcurrent protection demand day by day improved cannot be met.Rise the low-drag type PTC unit filling the conductive metal powder such as nikel powder afterwards
Part, but owing to nikel powder is oxidized easily so that the stability of element receives the biggest impact.Use the conductivity ceramics materials such as titanium carbide
Material, its thermal conductivity is the highest, but electric conductivity is general, and equally exists the problem that stability is low.
Therefore, the research about semistor need to improve further.
Summary of the invention
It is an object of the invention to provide a kind of PTC macromolecular thermosensitive resistor material, have that internal resistance is low, oxidative resistance good, lead
The feature that electrical property is good and with low cost.
The present invention can be achieved through the following technical solutions:
A kind of PTC macromolecular thermosensitive resistor material, comprises the component of following weight portion: the crystal type high score of 30～50 weight portions
Sub-polymer；The Graphene of 1～5 weight portions, the carbon black of 10～30 weight portions；The non-conducting filler of 10～30 weight portions, 0.5～
The antioxidant of 1 weight portion.
Further, described PTC macromolecular thermosensitive resistor material comprises: the crystal type macromolecule of part of 35～45 weight
Polymer；The Graphene of 2～4 weight portions；The non-conducting filler of 15～25 weight portions, the antioxidant of 0.7～0.9 weight portion.
Wherein, described carbon black and Graphene are mixed into conductive filler.
Further, described Graphene is graphite alkenes nano material, and described graphite alkenes nano material includes aoxidizing stone
Ink alkene, Graphene-polyethylene glycol dimethacrylate, graphene-polypyrrole and Graphene-poly-MTMS.
And, described graphite alkenes nano material is the activated carbon prepared with Renewable resource carbonization by modified model Hummers method and can
Inverse addition-fracture chain transfer polymerization method synthesis.
Further, any one during described antioxidant is antioxidant 1010, antioxidant 1076, antioxidant CA
Or multiple mixing.
Further, described crystal type high molecular polymer is selected from high density polyethylene (HDPE), medium density polyethylene, the lowest
Density polyethylene, Low Density Polyethylene, polypropylene (PP), Kynoar, Vingon, poly(ethylene oxide), poly-to benzene two
At least one in formic acid butanediol ester, polyethylene terephthalate.
Further, described non-conducting filler be selected from silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide,
At least one in ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carborundum, silicon nitride, barium sulfate, calcium carbonate.
Further, a kind of method of PTC macromolecular thermosensitive resistor material prepared described in claim 1～8, step bag
Include: crystal type high molecular polymer, Graphene, carbon black, non-conducting filler and the antioxidant of predetermined ratio are mixed,
Obtain mixture；Then described mixture is carried out extruding pelletization, in order to obtain pellet；Described pellet is carried out hot pressing be combined
I.e. can get described PTC macromolecular thermosensitive resistor material.
One PTC macromolecular thermosensitive resistor material of the present invention, has a following beneficial effect:
Use Graphene to substitute conventional carbon black and nikel powder is applied at PTC heating resistor material, the theory ratio of Graphene can be played
Surface area is 2630m2The advantage of/g, effectively promotes the electric conductivity of critesistor, reduces the internal resistance of critesistor.Meanwhile, graphite
Alkene and PTC heating also exist stronger between other compositions such as crystal type high molecular polymer of macromolecular material, non-conducting filler
Interaction, given full play to Graphene excellent thermal conductivity and mechanical performance excellent characteristics, the critesistor tool making to prepare
There is preferable resistance to oxidation line, effectively extend the service life of critesistor.And, can generation by a small amount of Graphene of employing
For white carbon black and nikel powder, effectively reduce raw-material kind and consumption, significantly reduce the cost of production.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with embodiment and to this
Invention product is described in further detail.
Embodiment 1
The invention discloses a kind of PTC macromolecular thermosensitive resistor material, comprise the component of following weight portion: the knot of 50 weight portions
Crystal formation high molecular polymer；The Graphene of 1 weight portion and the carbon black of 39 weight portions are mixed into conductive filler；9.5 weight portions non-
Conductive filler, the antioxidant of 0.5 weight portion.
Each composition of aforementioned proportion is mixed, obtains mixture；Then described mixture is carried out extruding pelletization, with
Just pellet is obtained；Described pellet is carried out that hot pressing is compound i.e. can get described PTC macromolecular thermosensitive resistor material.
In the present embodiment, described Graphene is graphite alkenes nano material, and described graphite alkenes nano material includes oxygen
Functionalized graphene, Graphene-polyethylene glycol dimethacrylate, graphene-polypyrrole and Graphene-poly-methyl trimethoxy epoxide silicon
Alkane.Described graphite alkenes nano material is the activated carbon prepared with Renewable resource carbonization by modified model Hummers method and can
Inverse addition-fracture chain transfer polymerization method synthesis.
In the present embodiment, described crystal type high molecular polymer is selected from high density polyethylene (HDPE), medium density polyethylene, line
Property Low Density Polyethylene, Low Density Polyethylene, polypropylene (PP), Kynoar, Vingon, poly(ethylene oxide), poly-right
At least one in benzene dicarboxylic acid butanediol ester, polyethylene terephthalate.
In the present embodiment, described non-conducting filler is selected from silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide
In titanium, ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carborundum, silicon nitride, barium sulfate, calcium carbonate at least one
Kind.
In the present embodiment, the antioxidant used is in antioxidant 1010, antioxidant 1076, antioxidant CA
The mixing of any one or more.
Embodiment 2
The invention discloses a kind of PTC macromolecular thermosensitive resistor material, comprise the component of following weight portion: the knot of 45 weight portions
Crystal formation high molecular polymer；The Graphene of 2 weight portions and the carbon black of 43 weight portions are mixed into conductive filler；The non-of 9 weight portions is led
Electricity filler, the antioxidant of 1 weight portion.
Each composition of aforementioned proportion is mixed, obtains mixture；Then described mixture is carried out extruding pelletization, with
Just pellet is obtained；Described pellet is carried out that hot pressing is compound i.e. can get described PTC macromolecular thermosensitive resistor material.
In the present embodiment, described Graphene is graphite alkenes nano material, and described graphite alkenes nano material includes oxygen
Functionalized graphene, Graphene-polyethylene glycol dimethacrylate, graphene-polypyrrole and Graphene-poly-methyl trimethoxy epoxide silicon
Alkane.Described graphite alkenes nano material is the activated carbon prepared with Renewable resource carbonization by modified model Hummers method and can
Inverse addition-fracture chain transfer polymerization method synthesis.
In the present embodiment, described crystal type high molecular polymer be selected from high density polyethylene (HDPE), medium density polyethylene,
Linear low density polyethylene, Low Density Polyethylene, polypropylene (PP), Kynoar, Vingon, poly(ethylene oxide), poly-
At least one in mutual-phenenyl two acid bromide two alcohol ester, polyethylene terephthalate.
In the present embodiment, described non-conducting filler is selected from silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide
In titanium, ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carborundum, silicon nitride, barium sulfate, calcium carbonate at least one
Kind.
In the present embodiment, the antioxidant used is in antioxidant 1010, antioxidant 1076, antioxidant CA
The mixing of any one or more.
Embodiment 3
The invention discloses a kind of PTC macromolecular thermosensitive resistor material, comprise the component of following weight portion: part of 40 weight
Crystal type high molecular polymer；The Graphene of 3 weight portions；The carbon black of 41.3 weight portions；The non-conducting filler of 15 weight portions, 0.7
The antioxidant of weight portion.
Each composition of aforementioned proportion is mixed, obtains mixture；Then described mixture is carried out extruding pelletization, with
Just pellet is obtained；Described pellet is carried out that hot pressing is compound i.e. can get described PTC macromolecular thermosensitive resistor material.
In the present embodiment, described Graphene is graphite alkenes nano material, and described graphite alkenes nano material includes oxygen
Functionalized graphene, Graphene-polyethylene glycol dimethacrylate, graphene-polypyrrole and Graphene-poly-methyl trimethoxy epoxide silicon
Alkane.Described graphite alkenes nano material is the activated carbon prepared with Renewable resource carbonization by modified model Hummers method and can
Inverse addition-fracture chain transfer polymerization method synthesis.
In the present embodiment, described crystal type high molecular polymer be selected from high density polyethylene (HDPE), medium density polyethylene,
Linear low density polyethylene, Low Density Polyethylene, polypropylene (PP), Kynoar, Vingon, poly(ethylene oxide), poly-
At least one in mutual-phenenyl two acid bromide two alcohol ester, polyethylene terephthalate.
In the present embodiment, described non-conducting filler is selected from silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide
In titanium, ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carborundum, silicon nitride, barium sulfate, calcium carbonate at least one
Kind.
In the present embodiment, the antioxidant used is in antioxidant 1010, antioxidant 1076, antioxidant CA
The mixing of any one or more.
Embodiment 4
The invention discloses a kind of PTC macromolecular thermosensitive resistor material, comprise the component of following weight portion: part of 45 weight
Crystal type high molecular polymer；The Graphene of 4 weight portions；The carbon black of 35 weight portions；The non-conducting filler of 15 weight portions, 1 weight
The antioxidant of part.
Each composition of aforementioned proportion is mixed, obtains mixture；Then described mixture is carried out extruding pelletization, with
Just pellet is obtained；Described pellet is carried out that hot pressing is compound i.e. can get described PTC macromolecular thermosensitive resistor material.
In the present embodiment, described Graphene is graphite alkenes nano material, and described graphite alkenes nano material includes oxygen
Functionalized graphene, Graphene-polyethylene glycol dimethacrylate, graphene-polypyrrole and Graphene-poly-methyl trimethoxy epoxide silicon
Alkane.Described graphite alkenes nano material is the activated carbon prepared with Renewable resource carbonization by modified model Hummers method and can
Inverse addition-fracture chain transfer polymerization method synthesis.
In the present embodiment, described crystal type high molecular polymer be selected from high density polyethylene (HDPE), medium density polyethylene,
Linear low density polyethylene, Low Density Polyethylene, polypropylene (PP), Kynoar, Vingon, poly(ethylene oxide), poly-
At least one in mutual-phenenyl two acid bromide two alcohol ester, polyethylene terephthalate.
In the present embodiment, described non-conducting filler is selected from silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide
In titanium, ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carborundum, silicon nitride, barium sulfate, calcium carbonate at least one
Kind.
In the present embodiment, the antioxidant used is in antioxidant 1010, antioxidant 1076, antioxidant CA
The mixing of any one or more.
Embodiment 5
The invention discloses a kind of PTC macromolecular thermosensitive resistor material, comprise the component of following weight portion: part of 46.5 weight
Crystal type high molecular polymer；The Graphene of 3.5 weight portions；The carbon black of 37 weight portions；The non-conducting filler of 12 weight portions, 1
The antioxidant of weight portion.
Each composition of aforementioned proportion is mixed, obtains mixture；Then described mixture is carried out extruding pelletization, with
Just pellet is obtained；Described pellet is carried out that hot pressing is compound i.e. can get described PTC macromolecular thermosensitive resistor material.
In the present embodiment, described Graphene is graphite alkenes nano material, and described graphite alkenes nano material includes oxygen
Functionalized graphene, Graphene-polyethylene glycol dimethacrylate, graphene-polypyrrole and Graphene-poly-methyl trimethoxy epoxide silicon
Alkane.Described graphite alkenes nano material is the activated carbon prepared with Renewable resource carbonization by modified model Hummers method and can
Inverse addition-fracture chain transfer polymerization method synthesis.
In the present embodiment, described crystal type high molecular polymer be selected from high density polyethylene (HDPE), medium density polyethylene,
Linear low density polyethylene, Low Density Polyethylene, polypropylene (PP), Kynoar, Vingon, poly(ethylene oxide), poly-
At least one in mutual-phenenyl two acid bromide two alcohol ester, polyethylene terephthalate.
In the present embodiment, described non-conducting filler is selected from silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide
In titanium, ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carborundum, silicon nitride, barium sulfate, calcium carbonate at least one
Kind.
In the present embodiment, the antioxidant used is in antioxidant 1010, antioxidant 1076, antioxidant CA
The mixing of any one or more.
In order to verify that PTC macromolecular thermosensitive resistor material of the present invention is used in the performance of critesistor, respectively enforcement
Room temperature internal resistance after example 1～5 uses four probe method to carry out room temperature inner walkway and action 1000 times is tested.Meanwhile,
As a comparison, the commercially available PTC macromolecular thermosensitive resistor material comprising white carbon black and nikel powder type is also adopted by identical method system
Contrast as a comparison case as critesistor, be also adopted by same instrument and use four probe method to carry out identical entry under identical condition
Purpose performance test.From the point of view of test result, the room temperature internal resistance of the sample of embodiment 1～5 preparation is substantially less than the sample of comparative example
Product, illustrate that the PTC macromolecular thermosensitive resistor material containing Graphene is prepared the critesistor of gained and had relatively low internal resistance；And it is resistance to
Oxidation susceptibility is significantly better than the existing sample comprising white carbon black and nikel powder.And, by using a small amount of Graphene to replace
White carbon black and nikel powder, effectively reduce raw-material kind and consumption, significantly reduce the cost of production.
The above, only presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction；All
The those of ordinary skill of the industry all can described in by specification and the above and implement the present invention swimmingly；But, all familiar
Professional and technical personnel, in the range of without departing from technical solution of the present invention, may utilize disclosed above technology contents and makes
A little change, the equivalent variations modifying and develop, be the Equivalent embodiments of the present invention；Meanwhile, all realities according to the present invention
The change of any equivalent variations that above example is made by matter technology, modify and differentiation etc., all still fall within the technology of the present invention
Within the protection domain of scheme.
Claims (9)
1. a PTC macromolecular thermosensitive resistor material, it is characterised in that comprise the component of following weight portion: 30～50 weight portions
Crystal type high molecular polymer；The Graphene of 1～5 weight portions, the carbon black of 10～30 weight portions；10～30 the non-of weight portion are led
Electricity filler, the antioxidant of 0.5～1 weight portion.
PTC macromolecular thermosensitive resistor material the most according to claim 1, it is characterised in that: described PTC macromolecule temperature-sensitive electricity
Resistance material comprises: the crystal type high molecular polymer of part of 35～45 weight；The Graphene of 2～4 weight portions；15～25 weight
The non-conducting filler of part, the antioxidant of 0.7～0.9 weight portion.
PTC macromolecular thermosensitive resistor material the most according to claim 2, it is characterised in that: described carbon black and Graphene mix
It is combined into conductive filler.
PTC macromolecular thermosensitive resistor material the most according to claim 2, it is characterised in that: described Graphene is Graphene
Class nano material, described graphite alkenes nano material include graphene oxide, Graphene-polyethylene glycol dimethacrylate,
Graphene-polypyrrole and Graphene-poly-MTMS.
PTC macromolecular thermosensitive resistor material the most according to claim 4, it is characterised in that: described graphite alkenes nanometer material
Material is polymerized by modified model Hummers method and reversible addion-fragmentation chain transfer for the activated carbon prepared with Renewable resource carbonization
Method synthesis.
PTC macromolecular thermosensitive resistor material the most according to claim 2, it is characterised in that: described antioxidant is antioxidation
The mixing of any one or more in agent 1010, antioxidant 1076, antioxidant CA.
PTC macromolecular thermosensitive resistor material the most according to claim 2, it is characterised in that: described crystal type high molecular polymerization
Thing is selected from high density polyethylene (HDPE), medium density polyethylene, linear low density polyethylene, Low Density Polyethylene, polypropylene (PP), gathers
In vinylidene, Vingon, poly(ethylene oxide), polybutylene terephthalate (PBT), polyethylene terephthalate
At least one.
PTC macromolecular thermosensitive resistor material the most according to claim 2, it is characterised in that: described non-conducting filler is choosing
From silicon dioxide, aluminium oxide, magnesium oxide, zinc oxide, titanium dioxide, ferrum oxide, magnesium hydroxide, calcium hydroxide, aluminium hydroxide, carbon
At least one in SiClx, silicon nitride, barium sulfate, calcium carbonate.
9. the method for the PTC macromolecular thermosensitive resistor material that a kind is prepared described in claim 1～8, it is characterised in that its step
Including: crystal type high molecular polymer, Graphene, carbon black, non-conducting filler and the antioxidant of predetermined ratio are mixed
Close, obtain mixture；Then described mixture is carried out extruding pelletization, in order to obtain pellet；Described pellet is carried out hot pressing multiple
Close and i.e. can get described PTC macromolecular thermosensitive resistor material.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107286538A (en) * | 2017-08-03 | 2017-10-24 | 合肥欧仕嘉机电设备有限公司 | A kind of highly sensitive high temperature resistant thermistor composite material and preparation method thereof |
| CN107680767A (en) * | 2017-09-26 | 2018-02-09 | 苏州南尔材料科技有限公司 | A kind of preparation method of carbon silicon doping thermistor |
| CN108002746A (en) * | 2017-11-23 | 2018-05-08 | 苏州南尔材料科技有限公司 | A kind of preparation method of NTC thermistor material |
| CN110010321A (en) * | 2018-01-05 | 2019-07-12 | 惠州市聚鼎电子有限公司 | A kind of preparation method for restoring circular ring shape PPTC fuse |
| CN110791005A (en) * | 2019-11-26 | 2020-02-14 | 华东理工大学 | PTC composite material containing polyethylene, carbon black and conductive modified graphene and preparation method thereof |
| CN110804234A (en) * | 2019-09-29 | 2020-02-18 | 芜湖凯龙电子科技有限公司 | Novel method for preparing PPTC (polymeric positive temperature coefficient) overcurrent protection element by using graphene |
| CN111363369A (en) * | 2020-04-23 | 2020-07-03 | 海门市华高新材料科技有限公司 | Optical cable filling paste and preparation method thereof |
| CN111978620A (en) * | 2020-09-10 | 2020-11-24 | 合肥金四达科技有限公司 | Polyethylene/titanium diboride/graphene thermosensitive conductive composite material and preparation method thereof |
| CN113725555A (en) * | 2021-09-28 | 2021-11-30 | 星恒电源(滁州)有限公司 | Lithium ion battery diaphragm and preparation method thereof |
| CN115244631A (en) * | 2020-02-25 | 2022-10-25 | 力特保险丝公司 | PPTC heaters and materials with stable power and self-limiting characteristics |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107286538A (en) * | 2017-08-03 | 2017-10-24 | 合肥欧仕嘉机电设备有限公司 | A kind of highly sensitive high temperature resistant thermistor composite material and preparation method thereof |
| CN107680767A (en) * | 2017-09-26 | 2018-02-09 | 苏州南尔材料科技有限公司 | A kind of preparation method of carbon silicon doping thermistor |
| CN108002746A (en) * | 2017-11-23 | 2018-05-08 | 苏州南尔材料科技有限公司 | A kind of preparation method of NTC thermistor material |
| CN110010321A (en) * | 2018-01-05 | 2019-07-12 | 惠州市聚鼎电子有限公司 | A kind of preparation method for restoring circular ring shape PPTC fuse |
| CN110804234A (en) * | 2019-09-29 | 2020-02-18 | 芜湖凯龙电子科技有限公司 | Novel method for preparing PPTC (polymeric positive temperature coefficient) overcurrent protection element by using graphene |
| CN110791005A (en) * | 2019-11-26 | 2020-02-14 | 华东理工大学 | PTC composite material containing polyethylene, carbon black and conductive modified graphene and preparation method thereof |
| CN115244631A (en) * | 2020-02-25 | 2022-10-25 | 力特保险丝公司 | PPTC heaters and materials with stable power and self-limiting characteristics |
| CN111363369A (en) * | 2020-04-23 | 2020-07-03 | 海门市华高新材料科技有限公司 | Optical cable filling paste and preparation method thereof |
| CN111363369B (en) * | 2020-04-23 | 2022-03-25 | 南通市华高新材料科技有限公司 | Optical cable filling paste and preparation method thereof |
| CN111978620A (en) * | 2020-09-10 | 2020-11-24 | 合肥金四达科技有限公司 | Polyethylene/titanium diboride/graphene thermosensitive conductive composite material and preparation method thereof |
| CN113725555A (en) * | 2021-09-28 | 2021-11-30 | 星恒电源(滁州)有限公司 | Lithium ion battery diaphragm and preparation method thereof |
| CN113725555B (en) * | 2021-09-28 | 2023-03-10 | 星恒电源(滁州)有限公司 | Lithium ion battery diaphragm and preparation method thereof |
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Application publication date: 20161123 |