CN105860376A - BNT-monocrystal-nanowire-based dielectric composite material and preparation method thereof - Google Patents
BNT-monocrystal-nanowire-based dielectric composite material and preparation method thereof Download PDFInfo
- Publication number
- CN105860376A CN105860376A CN201610268357.7A CN201610268357A CN105860376A CN 105860376 A CN105860376 A CN 105860376A CN 201610268357 A CN201610268357 A CN 201610268357A CN 105860376 A CN105860376 A CN 105860376A
- Authority
- CN
- China
- Prior art keywords
- bnt
- preparation
- composite material
- dopamine
- dielectric composite
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/003—Titanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/08—Oxygen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
- C01P2004/16—Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer
Abstract
The invention discloses a BNT-monocrystal-nanowire-based dielectric composite material and a preparation method thereof. The preparation method comprises the following steps: preparing a BNT monocrystal nanowire material with the length-diameter ratio of 20-50 by a hydrothermal process, carrying out chemical modification by using dopamine, and compounding with a vinylidene fluoride-hexafluoropropylene P(VDF-HFP) copolymer to obtain the dielectric composite material. On the premise of implementing low ceramic phase content, the dielectric composite material obtains the anti-breakdown electric field of up to 458 kV/mm which is higher than the anti-breakdown electric field of 398 kV/mm of the straight polymer P(VDF-HFP), and implements the high energy density of 12.7 J/cm<3>.
Description
Technical field
The present invention relates to a kind of dielectric composite material based on BNT monocrystal nanowire and preparation method thereof.
Background technology
Energy storage technology is applied to electronics industry widely, and wherein capacitor is due to its high-energy-density and the speed of discharge and recharge efficiently
Spend and be widely used.In order to realize higher energy density, exploitation have high-k, high dielectric strength dielectric material extremely
Close important.
Ceramic/polymer nano composite material is usually 0-3 type, and (0 dimension structure nano ceramics is dispersed in the polymer base that 3-dimensional connects
In body).Theoretical according to percolation threshold, 0-3 type ceramic/polymer composite typically requires compound more than 50vol% ceramic particle
Its complex dielectric constant can be made to reach threshold value, but on the one hand the ceramic filler amount of high-load destroys the pliability of material, the opposing party
Face is substantially reduced ability and the mechanical performance of the anti-breakdown electric field of complex due to inevitable defect and reunion.And 0 Wei Jiegouna
Rice ceramic powders is uniformly dispersed in polymer body, it is impossible to forms continuous print seepage flow heat dissipation path, limits the heat conduction of complex
Performance.
Summary of the invention
It is an object of the invention to provide and a kind of there is high-k, high anti-breakdown electric field, high-energy-density and thermal conductive resin
The preparation method of dielectric composite material based on BNT monocrystal nanowire, the present invention can obtain under the conditions of low BNT nano wire content
To the dielectric composite material with high-energy-density.
Another object of the present invention is to provide one to have high-k, high anti-breakdown electric field, high-energy-density and good heat conductive
The dielectric composite material based on BNT monocrystal nanowire of property.
The technical scheme is that
The preparation method of a kind of dielectric composite material based on BNT monocrystal nanowire, preparing draw ratio by hydro-thermal method is 20
The BNT nanometer monocrystalline wire material of-50, after it is chemically modified with dopamine again with vinylidene fluoride-hexafluoropropylene copolymer
P (VDF-HFP) is combined, and obtains dielectric composite material.
The present invention includes following preferred technical scheme:
Preferably in scheme, a diameter of 80-100nm of described BNT monocrystal nanowire.
Preferably in scheme, the average length of described BNT monocrystal nanowire is 2-5 μm.
Preferably in scheme, the BNT monocrystal nanowire that dopamine is modified is relative to the volume integral of vinylidene fluoride-hexafluoropropylene copolymer
Number is 2%-13%.
Preferably in scheme, the BNT monocrystal nanowire that dopamine is modified is relative to the volume integral of vinylidene hexafluoropropylene copolymer
Number is 2%-5%.
Preferably in scheme, the thickness of described dielectric composite material is 10-20 μm.
Preferably in scheme, the preparation process of described BNT monocrystal nanowire is: by Bi (NO3)3·5H2O, NaNO3With
Ti(OC4H9)4It is dissolved in CH respectively3COOH, deionized water and CH3CH2In OH, mixing, by molten for the NaOH of 8-10mol/L
Liquid adds above-mentioned mixed solution, stirring, obtains precursor solution, and it is the stainless of liner that precursor solution is put into politef
In steel reactor, seal, keep temperature to be 150-180 DEG C, reaction, cooling, filter, clean, be dried to obtain BNT monocrystalline
Nano wire.
Preferably in scheme, described dopamine is modified the process of BNT monocrystal nanowire and is: by BNT nano wire ultrasonic disperse in wine
Essence, with the mixed solution of deionized water, is reacted, centrifugation after reaction, and vacuum drying is subsequently adding dopamine hydrochloride water-soluble
In liquid, in 50-70 DEG C of stirring, recentrifuge separates, and 50-70 DEG C of vacuum drying, obtains the BNT monocrystalline that dopamine is modified
Nano wire.
Preferably in scheme, described recombination process is: the NBT monocrystal nanowire modified by dopamine adds vinylidene-hexafluoro third
In alkene copolymer solution, after ultrasonic disperse, ball milling disperses further, by suspension flow casting molding, is dried at 70-90 DEG C, obtains
Composite sheets, then at 180-200 DEG C, under 15-20MPa, hot pressing obtains the dielectric composite material of densification.
Preferably in scheme, the concentration of described dopamine hydrochloride aqueous solution is 0.01-0.015mol/L.
The invention still further relates to the dielectric composite material prepared by above-mentioned preparation method.
Wherein, vinylidene fluoride-hexafluoropropylene copolymer solution refers to that vinylidene fluoride-hexafluoropropylene copolymer is dissolved in acetone and dimethyl
The mixed solution obtained in Methanamide (DMF).
Wherein, the volume ratio of acetone and dimethylformamide is most preferably 70:30.
Described BNT is Bi0.5Na0.5TiO3。
For the effect obtaining comprehensive high-k, high anti-breakdown electric field, high-energy-density and thermal conductive resin, most preferably
The BNT monocrystal nanowire that dopamine is modified is 2.37vol% relative to the volume fraction of vinylidene hexafluoropropylene copolymer.
Beneficial effects of the present invention
The present invention utilizes hydro-thermal reaction, it is thus achieved that a diameter of 80-100nm, and average length is the high length-diameter ratio (20-50) of 2-5 μm
BNT monocrystal nanowire, it is combined with P (VDF-HFP), the dielectric composite material prepared can contain at low ceramic phase
High dielectric constant and high anti-breakdown electric field is realized, it is thus achieved that high energy density under conditions of amount.
It is few that the present invention obtains defect in dielectric composite material, has the mechanical performance of excellence.
The monocrystal nanowire of the present invention can be formed in polymeric matrix and be dislocatedly distributed, thus is prone to form Heat transmission in different directions
Approach, prepares the dielectric composite material that heat conductivity is good.
In the present invention, BNT monocrystal nanowire/P (VDF-HFP) dielectric composite material is at the low ceramic phase content (BNT of 2.73vol%
Monocrystal nanowire) under conditions of, it is thus achieved that the anti-breakdown electric field of 458kV/mm, than the anti-breakdown electric field of pure P (VDF-HFP) polymer
Higher.
Energy density is up to 12.7J/cm3, three times higher more than pure P (VDF-HFP).
This dielectric composite material achieves under conditions of low ceramic phase content (particularly BNT nano wire content is 2.37vol%),
Obtain the anti-breakdown electric field of 458kV/mm, higher than straight polymer P (VDF-HFP) anti-breakdown electric field 398kV/mm, it is achieved
12.7J/cm3High-energy-density.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of the BNT monocrystal nanowire of embodiment 1 preparation.Can be seen that synthesized BNT nano wire tool
There is the highest draw ratio.
Fig. 2 is that the dopamine of different content modifies the BNT monocrystal nanowire dielectric composite material that obtain compound with P (VDF-HFP)
The scanning electron microscope (SEM) photograph on surface.(a) 2.37vol%, (b) 5.19vol%, (c) 12.73vol%.It can be seen that along with BNT monocrystalline
The increase of nano wire addition, its surface visible BNT monocrystal nanowire also gets more and more, and they are embedded in polymer uniformly
In matrix, do not find significantly to reunite and other defect.
Fig. 3 is that the dopamine of different content modifies the BNT monocrystal nanowire dielectric composite material that obtain compound with P (VDF-HFP)
Anti-breakdown electric field.It can be seen that content is to obtain the highest anti-breakdown electric field 458kV/mm during 2.37vol%.
Fig. 4 is that the dopamine of different content modifies the BNT monocrystal nanowire dielectric composite material that obtain compound with P (VDF-HFP)
Dielectric constant frequency spectrum.Can be seen that the dielectric constant of complex increases along with the increase of BNT nano wire content.
Fig. 5 is that the dopamine of different content modifies the BNT monocrystal nanowire dielectric composite material that obtain compound with P (VDF-HFP)
The ferroelectric hysteresis loop under 300kV/mm electric field.
Fig. 6 is composite sample energy density under not same electric field.Can be seen that when content is 2.37vol%, the energy of complex
Metric density is rapidly increased to 12.7J/cm3。
Specific embodiment
Embodiment 1
Hydrothermal Synthesis BNT monocrystal nanowire
0.005mol Bi(NO3)3·5H2O and 0.01mol NaNO3It is dissolved separately in 7.5ml CH3COOH and 2.5ml go from
In sub-water, 0.005mol Ti (OC4H9)4It is dissolved in 10ml CH3CH2In OH, by Bi (NO3)3·5H2O solution and NaNO3
Solution adds Ti (OC4H9)4Solution is made mixed solution.The 30ml NaOH solution of 10mol/L is added above-mentioned mixing molten
Liquid, under room temperature, magnetic agitation 1h obtains uniform precursor solution.It is liner that precursor solution is put into 100ml politef
Stainless steel cauldron in, seal, put into couveuse 170 DEG C insulation 48h and utilize reactor to spontaneously form pressure promote
Reaction occurs.After temperature retention time terminates, naturally cool to room temperature.By the product deionized water sucking filtration obtained, cleaning, place into
The drying baker of 80 DEG C is dried to obtain BNT monocrystal nanowire.
Embodiment 2
Dopamine modifies the preparation of BNT monocrystal nanowire and P (VDF-HFP) dielectric composite material
Weigh BNT nano wire prepared by 2.0g to be distributed in 95:5 (v/v) ethanol/water mixed solution, stirring and supersound process, from
The heart collects precipitate, and vacuum drying obtains the BNT monocrystal nanowire that the adsorbed hydroxyl content increases.Hydroxylated BNT monocrystalline is received
Rice noodle is distributed in the dopamine hydrochloride aqueous solution of 0.01mol/L, 60 DEG C of back flow reaction 10h, centrifugal after being cooled to room temperature, and
Thoroughly clean with deionized water, collect powder 60 DEG C of dry 24h in vacuum drying oven.
In P (VDF-HFP) polymer solution, the dopamine of addition 2.37vol%, 5.19vol% and 12.73vol% is modified
BNT monocrystal nanowire, after ultrasonic disperse, ball milling dispersion further in 2 days, scattered BNT/P (VDF-HFP) suspension exists
Flow casting molding on clean sheet glass, is dried 24h at 80 DEG C, obtains composite sheets, then at 200 DEG C, and 15MPa pressure
Under the conditions of to be hot pressed into thickness be 10-20 μm, fine and close dielectric composite material.
Embodiment 3:
The electric performance test of dielectric composite material
Designing a diameter of 2mm of circular port, the center of circle, hole spacing is the metal mask plate of 4mm, and metal mask plate is shaped as square,
The length of side is 30mm.The dielectric composite material suppressed is clipped in the middle of 2 metal mask plates, upper and lower surface symmetry sputtering gold electrode,
Upper and lower surface sputtering time is 10min, it is ensured that gold electrode has enough thickness.Utilize electric impedance analyzer to test its electric capacity to draw
Dielectric constant, result is as shown in Figure 4, it can be seen that the dielectric constant of complex increases along with the increase of BNT nano wire content,
Such as when 1kHz, when in complex, BNT nano wire content is respectively 0, when 2.37,5.19 and 12.73vol%, its dielectric
Constant is respectively 6.9,13.1,16.9 and 21.7.Ferroelectricity analyser is utilized to test its ferroelectric hysteresis loop.Testing result such as Fig. 5
Shown in.Owing to BNT self leakage current is relatively big, therefore when in complex, BNT nano wire content is to 12.73vol%, its ferroelectricity
Ferroelectric hysteresis loop is substantially fat than low content BNT nano wire dielectric composite material, and remanent polarization substantially becomes big, the energy of storage
Lost owing to its major part is lost and cannot be discharged.Therefore dopamine modifies BNT monocrystal nanowire and P (VDF-HFP)
The maximum energy-density of dielectric composite material shows and the general different feature of ceramic nano line, and its energy density is at low content
During BNT nano wire higher, when content increases, its energy density reduces on the contrary.Dopamine modifies the content of BNT nano wire
During 2.37vol%, it is thus achieved that maximum energy density 12.7J/cm3。
Claims (10)
1. the preparation method of a dielectric composite material based on BNT monocrystal nanowire, it is characterised in that prepared by hydro-thermal method
Obtain the BNT nanometer monocrystalline wire material that draw ratio is 20-50, after it is chemically modified with dopamine again with vinylidene-
Hexafluoropropylene copolymer is combined, and obtains dielectric composite material.
Preparation method the most according to claim 1, it is characterised in that a diameter of 80-of described BNT monocrystal nanowire
100nm。
Preparation method the most according to claim 1, it is characterised in that the average length of described BNT monocrystal nanowire is 2
-5μm。
4. according to the preparation method described in any one of claim 1-3, it is characterised in that the BNT nanometer monocrystalline that dopamine is modified
Line is 2%-13% relative to the volume fraction of vinylidene fluoride-hexafluoropropylene copolymer.
5. according to the preparation method described in any one of claim 1-3, it is characterised in that the BNT nanometer monocrystalline that dopamine is modified
Line is 2%-5% relative to the volume fraction of vinylidene hexafluoropropylene copolymer.
6. according to the preparation method described in any one of claim 1-3, it is characterised in that the thickness of described dielectric composite material is
10-20μm。
Preparation method the most according to claim 1, it is characterised in that the preparation process of described BNT monocrystal nanowire is:
By Bi (NO3)3·5H2O, NaNO3With Ti (OC4H9)4It is dissolved in CH respectively3COOH, deionized water and CH3CH2In OH,
Mixing, adds the NaOH solution of 8-10mol/L above-mentioned mixed solution, stirring, obtains precursor solution, by presoma
Solution is put in the stainless steel cauldron that politef is liner, seals, and keeps temperature to be 150-180 DEG C, reaction, cooling,
Filter, clean, be dried to obtain BNT monocrystal nanowire.
8. according to the preparation method described in claim 1 or 7, it is characterised in that described dopamine modifies BNT monocrystal nanowire
Process be: by BNT nano wire ultrasonic disperse in the mixed solution of ethanol and deionized water, reaction, centrifugation after reaction,
Vacuum drying, is subsequently adding in dopamine hydrochloride aqueous solution, and in 50-70 DEG C of stirring, recentrifuge separates, true at 50-70 DEG C
Empty dry, obtain the BNT monocrystal nanowire that dopamine is modified.
Preparation method the most according to claim 1, it is characterised in that described recombination process is: the NBT that dopamine is modified
Monocrystal nanowire adds in vinylidene fluoride-hexafluoropropylene copolymer solution, and after ultrasonic disperse, ball milling disperses further, by suspension
Flow casting molding, is dried at 70-90 DEG C, obtains composite sheets, and then at 180-200 DEG C, under 15-20MPa, hot pressing obtains densification
Dielectric composite material.
10. the dielectric composite material that the preparation method described in any one of claim 1-9 prepares.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610268357.7A CN105860376B (en) | 2016-04-27 | 2016-04-27 | A kind of dielectric composite material based on BNT monocrystal nanowires and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610268357.7A CN105860376B (en) | 2016-04-27 | 2016-04-27 | A kind of dielectric composite material based on BNT monocrystal nanowires and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105860376A true CN105860376A (en) | 2016-08-17 |
| CN105860376B CN105860376B (en) | 2017-07-25 |
Family
ID=56628629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610268357.7A Active CN105860376B (en) | 2016-04-27 | 2016-04-27 | A kind of dielectric composite material based on BNT monocrystal nanowires and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105860376B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280975A (en) * | 2018-11-06 | 2019-01-29 | 湘潭大学 | A kind of bismuth sodium titanate nanometer line and preparation method thereof |
| CN109553127A (en) * | 2018-12-29 | 2019-04-02 | 陕西科技大学 | A kind of bismuth sodium titanate nanometer line and preparation method thereof of hydro-thermal method preparation |
| CN109705502A (en) * | 2018-12-29 | 2019-05-03 | 中国科学技术大学 | A kind of polymer matrix composite and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070117913A1 (en) * | 2005-11-23 | 2007-05-24 | Qi Tan | Antiferroelectric polymer composites, methods of manufacture thereof, and articles comprising the same |
-
2016
- 2016-04-27 CN CN201610268357.7A patent/CN105860376B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070117913A1 (en) * | 2005-11-23 | 2007-05-24 | Qi Tan | Antiferroelectric polymer composites, methods of manufacture thereof, and articles comprising the same |
Non-Patent Citations (2)
| Title |
|---|
| HANG LUO等: "Enhancement of dielectric properties and energy storage density in poly(vinylidene fluoride-cohexafluoropropylene) by relaxor ferroelectric ceramics", 《RSC ADVANCES》 * |
| R.I. MAHDIN等: "Ferroelectric andpyroelectricpropertiesofnovellead-free polyvinylidenefluoride-trifluoroethylene–Bi0.5Na0.5TiO3 nanocomposite thin films for sensing applications", 《CERAMICS INTERNATIONAL》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280975A (en) * | 2018-11-06 | 2019-01-29 | 湘潭大学 | A kind of bismuth sodium titanate nanometer line and preparation method thereof |
| CN109553127A (en) * | 2018-12-29 | 2019-04-02 | 陕西科技大学 | A kind of bismuth sodium titanate nanometer line and preparation method thereof of hydro-thermal method preparation |
| CN109705502A (en) * | 2018-12-29 | 2019-05-03 | 中国科学技术大学 | A kind of polymer matrix composite and preparation method thereof |
| CN109553127B (en) * | 2018-12-29 | 2021-06-29 | 陕西科技大学 | Sodium bismuth titanate nanowire prepared by hydrothermal method and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105860376B (en) | 2017-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102135603B1 (en) | Method of preparing battery electrodes | |
| CN103849008B (en) | Hybrid particulates, polymer matrix composite and preparation method and application | |
| US9327984B2 (en) | Method of preparing graphene nanoplate, prepared graphene nanoplate, graphene nanoplate paste, and conductive layer including the graphene nanoplate | |
| Ahn et al. | Thermal conductivity of polymer composites with oriented boron nitride | |
| CN112552681B (en) | Functionalized boron nitride nanosheet/MXene/polybenzimidazole high-thermal-conductivity composite film and preparation method thereof | |
| CN105860376A (en) | BNT-monocrystal-nanowire-based dielectric composite material and preparation method thereof | |
| CN104312062B (en) | A kind of preparation method of energy-storage composite material | |
| KR20160133711A (en) | Method for preparation of high concentrated carbon nanotube/graphene dispersion | |
| CN106519516B (en) | A kind of dielectric composite material and preparation method thereof based on paraffin cladding barium titanate nano particle | |
| Sang et al. | Ni@ CNTs/Al2O3 ceramic composites with interfacial solder strengthen the segregated network for high toughness and excellent electromagnetic interference shielding | |
| JP5492195B2 (en) | Composite product and manufacturing method | |
| Wang et al. | Enhanced permittivity and energy density of P (VDF-HFP)-based capacitor using core-shell structured BaTiO 3@ TiO 2 fillers | |
| Wang et al. | High electromagnetic interference shielding effectiveness in MgO composites reinforced by aligned graphene platelets | |
| CN108485133B (en) | high-energy-storage-density composite material and preparation method thereof | |
| CN107732195A (en) | A kind of graphite modified method and graphite/silicon composite | |
| Wang et al. | A bio-inspired MXene/quaternary chitosan membrane with a “brick-and-mortar” structure towards high-performance photothermal conversion | |
| CN109020508B (en) | Three-dimensional graphene bridged oxide ceramic and preparation method thereof | |
| KR101254425B1 (en) | Graphene film having graphene oxide/poly vinyl alcohol composite and manufacturing method of the same | |
| Wang et al. | The size-matching effect in 0.1 Na1/3Ca1/3Bi1/3Cu3Ti4O12-xBa (Fe0. 5Nb0. 5) O3-(0.9-x) PVDF composites | |
| Moharana et al. | Treatment of surface-hydroxylated BaTiO3 particles by Bis (2-ethylhexyl) sulfosuccinate sodium salt (AOT) to improve the dielectric and electrical properties of BaTiO3–Poly (vinylidene fluoride) composites | |
| KR102268280B1 (en) | Reduced graphene oxide sheets activated by cellulose derivatives and Manufacturing method of reduced graphene oxide sheets activated by cellulose derivatives | |
| CN108199078B (en) | A kind of lithium ion battery | |
| CN113299570A (en) | Preparation method of die bonding material for semiconductor packaging and chip packaging mode | |
| CN113024974A (en) | One-dimensional TiO2Polyvinylidene fluoride composite film doped with nanowire hybrid structure and preparation method thereof | |
| CN105647098B (en) | A kind of high dielectric constant SBS elastic composite and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230104 Address after: No. 1208-1, 12th Floor, East Lake MOMAA Building, No.1 and No.3 Happy Avenue, Hongshan District, Wuhan, Hubei 430070 Patentee after: Yunfan New Materials Co.,Ltd. Address before: Yuelu District City, Hunan province 410083 Changsha Lushan Road No. 932 Patentee before: CENTRAL SOUTH University |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 1208-1, 12th Floor, East Lake MOMAA Building, No.1 and No.3 Happy Avenue, Hongshan District, Wuhan, Hubei 430070 Patentee after: Yunfan New Materials Group Co.,Ltd. Address before: No. 1208-1, 12th Floor, East Lake MOMAA Building, No.1 and No.3 Happy Avenue, Hongshan District, Wuhan, Hubei 430070 Patentee before: Yunfan New Materials Co.,Ltd. |