CN109913184A - A kind of function flexibility film and preparation method thereof - Google Patents
A kind of function flexibility film and preparation method thereof Download PDFInfo
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- CN109913184A CN109913184A CN201910097512.7A CN201910097512A CN109913184A CN 109913184 A CN109913184 A CN 109913184A CN 201910097512 A CN201910097512 A CN 201910097512A CN 109913184 A CN109913184 A CN 109913184A
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Abstract
A kind of function flexibility film and preparation method thereof, comprising the following steps: functional material powder and organic solvent are mixed and made into slurry, the functional material includes boron nitride or nanocrystalline；Pass through coating molding, primary functional film is formed after vacuum freeze drying solidifies, curing molding, in the curing process, organic solvent volatilization in slurry, so that one layer of the surface of primary functional film forms several holes, to form one layer of porous functional film layer on the surface of primary functional film；Under vacuum conditions, deposition processes are carried out with high molecular material to primary functional film, high molecular material infiltrates through in the hole in the porous functional film layer of primary functional film and surface, forms the function flexibility film semi-finished product of crosslinking package；Function flexibility film semi-finished product are pressed together, function flexibility film product is obtained.The present invention directly utilizes the functional materials such as boron nitride powder, manocrystalline powders to form functional film, flexibility brought by high molecular material is recycled, so that functional film has certain flexibility, dielectric constant is small, dielectric absorption is small, can be widely used for the heat conduction and heat radiation of 5G electronic product.
Description
Technical field
The invention belongs to thin film technique fields, specifically a kind of to have nano-crystal film flexible, boron nitride pellicle
Equal films and preparation method thereof.
Background technique
With the development of 5G mobile phone technique, communication signal frequency is higher and higher, interior of mobile phone in order to meet 2G, 4G,
5G demand signals, the internal occupied region of antenna is more and more, and the heat dissipation product of originally interior of mobile phone is inevitable
There is covering to antenna, in order to not influence the normal work of antenna, generally requires dissipating using low-k and low-dielectric loss
Hot product, the thermally conductive sheet of boron nitride material, which is provided simultaneously with high thermal conductivity, low-k and low-dielectric loss, can satisfy the application
Scene.
Current boron nitride thermally conductive sheet is usually to be sintered thin potsherd, and by sinter molding, integral thickness is larger, and
And it is more crisp, it is unable to bending, does not have flexibility characteristics, in application by biggish limitation, higher cost.
In addition, traditional nanocrystalline material is highly brittle, it is easy to it is broken, do not have flexibility characteristics.Moreover, nanocrystalline
Thickness be usually in 20 microns, be limited to preparation process, whole thickness is difficult to be adjusted.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of function flexibility films and preparation method thereof.
In order to solve the above-mentioned technical problem, the present invention takes following technical scheme:
A kind of preparation method of boron nitride pellicle, comprising the following steps:
Functional material powder and organic solvent are mixed and made into slurry, the functional material includes boron nitride or nanocrystalline；
By coating molding, the cured rear primary functional film of formation, curing molding, in the curing process, having in slurry
Solvent volatilization, so that one layer of the surface of primary functional film forms several holes, thus in the table of primary functional film
Face forms one layer of porous functional film layer；
Under vacuum conditions, deposition processes are carried out with high molecular material to primary functional film, high molecular material infiltrates through just
In hole in the porous functional film layer of grade functional film and surface, formed the function flexibility film half of crosslinking package at
Product；
Function flexibility film semi-finished product are pressed together, function flexibility film product is obtained.
The slurry that the functional material is constituted is solidified in a manner of vacuum freeze drying, in primary functional film
On porous functional film layer is prepared.
The high molecular material infiltration depositional mode is chemical vapor deposition (CVD).
The high molecular material penetrates into porous functional membrane and forms stereoscopic grid crosslinking layer by layer.
Functional material solid content >=50% for obtaining function flexibility film semi-finished product
The thickness of the function flexibility film product is depending on the time of hole functionality thicknesses of layers and chemical vapor deposition.
The function flexibility film semi-finished product are pressed in pressing using 10 ~ 100MPa pressure.
A kind of function flexibility film, is prepared according to above-described preparation method.
The powder that the present invention directlys adopt the functional materials such as boron nitride, nanocrystalline first carries out coating molding, then again with
High molecular material carries out chemical vapor deposition, so that the thickness for the function flexibility film being finally prepared is adjustable, and has
Enough flexibilities.
Specific embodiment
To further understand the features of the present invention, technological means and specific purposes achieved, function, below with reference to
Present invention is further described in detail for specific embodiment.
Embodiment one
Present invention discloses a kind of preparation methods of boron nitride pellicle, comprising the following steps:
Boron nitride powder and organic solvent are mixed and made into slurry, the proportion of the boron nitride and organic solvent can be deployed flexibly,
So that slurry meets certain consistency.
By coating molding, primary boron nitride pellicle is formed after vacuum freeze drying solidifies, during dry solidification,
Organic solvent volatilization in slurry, so that one layer of the surface of primary boron nitride pellicle forms several holes, to nitrogenize in primary
The surface of boron membrane forms one layer of porous boron nitride film layer；The aperture of the hole is usually 1 ~ 10 μm.Boron nitride particle at this time
It is piled into porous state and boron nitride institute hole is in connection state.
Under vacuum conditions, chemical vapor deposition process, macromolecule are carried out with high molecular material to primary boron nitride pellicle
Infiltration enters in the hole in the porous boron nitride film layer of primary boron nitride pellicle and surface, high molecular material penetrates into
Enter porous boron nitride film and forms stereoscopic grid crosslinking layer by layer.Form the boron nitride pellicle semi-finished product of crosslinking package.It utilizes simultaneously
The flexibility of high molecular material is mixed in primary boron nitride, so that boron nitride pellicle forms certain flexibility, is able to carry out
A degree of bending, to substantially increase its applicability.
Boron nitride pellicle semi-finished product are pressed together, the density and surface flatness of film is improved, obtains boron nitride
Film product.It is pressed together again by 10MPa ~ 100MPa, promotes global density, it is ensured that the thermal conductivity of boron nitride pellicle.
The high molecular material is Parylene.
The boron nitride pellicle that the present invention is prepared meets insulating properties, and the high score due to being applied in vapor deposition
Sub- material has sufficient flexibility, flexible not fragmentation is not easy to break, in addition, gas phase so that whole flexibility greatly increases
Deposition materials Parylene and boron nitride are advanced low-k materials, so that monolithic film membrane dielectric constant, dielectric absorption are all smaller,
Can be applied to high frequency, low frequency signal it is thermally conductive, the normal signal that will not influence antenna sends and receives, and thermal coefficient is higher.
Embodiment two
A kind of preparation method of nano-crystal film, comprising the following steps:
Manocrystalline powders and organic solvent are mixed and made into slurry, which can flexibly deploy,
So that slurry meets certain consistency.
By coating molding, primary nano-crystal film is formed after vacuum freeze drying solidifies, during dry solidification,
Organic solvent volatilization in slurry, so that one layer of the surface of primary nano-crystal film forms several holes, thus in primary nanometer
The surface of brilliant film forms one layer of porous nanocrystalline film layer；, the aperture of the hole is usually 1 ~ 10 μm.Nano-crystalline granule at this time
It is piled into porous state and nanocrystalline institute's hole is in connection state.
Under vacuum conditions, chemical vapor deposition process, macromolecule are carried out with high molecular material to primary nano-crystal film
Infiltration enters in the hole in the porous nanocrystalline film layer of primary nano-crystal film to be penetrated into surface, high molecular material
Porous nanocrystalline film layer forms stereoscopic grid crosslinking.Form the nano-crystal film semi-finished product of crosslinking package.Benefit is simultaneously using high
The flexibility of molecular material is mixed in primary nano-crystal film, so that nano-crystal film forms certain flexibility, Neng Goujin
The a degree of bending of row, to substantially increase its applicability.
Nano-crystal film semi-finished product are pressed together, the density and surface flatness of film is improved, obtains nanocrystalline
Film product.It is pressed together again by 10MPa ~ 100MPa, promotes global density, it is ensured that the magnetic conductivity of nano-crystal film.
The high molecular material is Parylene.
It should be noted that these are only the preferred embodiment of the present invention, it is not intended to restrict the invention, although ginseng
According to embodiment, invention is explained in detail, for those skilled in the art, still can be to aforementioned reality
Technical solution documented by example is applied to modify or equivalent replacement of some of the technical features, but it is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (8)
1. a kind of preparation method of function flexibility film, comprising the following steps:
Functional material powder and organic solvent are mixed and made into slurry, the functional material includes boron nitride or nanocrystalline；
By coating molding, the cured rear primary functional film of formation, curing molding, in the curing process, having in slurry
Solvent volatilization, so that one layer of the surface of primary functional film forms several holes, thus in the table of primary functional film
Face forms one layer of porous functional film layer；
Under vacuum conditions, deposition processes are carried out with high molecular material to primary functional film, high molecular material infiltrates through just
In hole in the porous functional film layer of grade functional film and surface, formed the function flexibility film half of crosslinking package at
Product；
Function flexibility film semi-finished product are pressed together, function flexibility film product is obtained.
2. the preparation method of function flexibility film according to claim 1, which is characterized in that the functional material structure
At slurry solidified in a manner of vacuum freeze drying, porous functional membrane is prepared on primary functional film
Layer.
3. the preparation method of function flexibility film according to claim 2, which is characterized in that the high molecular material seeps
Saturating depositional mode is chemical vapor deposition (CVD).
4. the preparation method of function flexibility film according to claim 3, which is characterized in that the high molecular material seeps
It penetrates into and forms stereoscopic grid crosslinking layer by layer into porous functional membrane.
5. the preparation method of function flexibility film according to claim 4, which is characterized in that described to obtain function flexibility
Functional material solid content >=50% of film semi-finished product.
6. the preparation method of function flexibility film according to claim 5, which is characterized in that the function flexibility film
The thickness of finished product is depending on the time of hole functionality thicknesses of layers and chemical vapor deposition.
7. the preparation method of function flexibility film according to claim 6, which is characterized in that the function flexibility film
Semi-finished product are pressed in pressing using 10 ~ 100MPa pressure.
8. a kind of function flexibility film, preparation method described in any one of -7 is prepared according to claim 1.
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Citations (2)
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| CN101143357A (en) * | 2007-07-13 | 2008-03-19 | 清华大学 | Nanocrystalline film and its low temperature preparing method |
| CN110684477A (en) * | 2019-10-10 | 2020-01-14 | 中国科学院深圳先进技术研究院 | Composite structure insulating adhesive film and preparation method thereof |
-
2019
- 2019-01-31 CN CN201910097512.7A patent/CN109913184A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143357A (en) * | 2007-07-13 | 2008-03-19 | 清华大学 | Nanocrystalline film and its low temperature preparing method |
| CN110684477A (en) * | 2019-10-10 | 2020-01-14 | 中国科学院深圳先进技术研究院 | Composite structure insulating adhesive film and preparation method thereof |
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| 《化工百科全书》编辑委员会: "《化工百科全书（第12卷）》", 30 November 1996, 化学工业出版社 * |
| CHUNYI ZHI. ET AL.: "《Towards thermoconductive, electrically insulating polymeric composites with boron nitride nanotubes as fillers》", 《ADVANCED FUNCTIONNAL MATERIALS》 * |
| JUN ZHANG，ET AL.: "《A facile method to prepare flexible boron nitride/poly(vinyl alcohol) composites with enhanced thermal conductivity》", 《COMPOSITES SCIENCE AND TECHNOLOGY》 * |
| 张而耕: "《机械工程材料》", 31 October 2017, 上海科学技术出版社 * |
| 时均等: "《膜技术手册》", 31 January 2001, 化学工业出版社 * |
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Application publication date: 20190621 |