CN109971020B - Functional nano cellulose-boron nitride composite film and preparation method thereof - Google Patents
Functional nano cellulose-boron nitride composite film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a functional nano-cellulose-boron nitride composite film, which is a composite film inner layer prepared by carrying out suction filtration on a mixed cellulose ester microporous filter membrane by using nano-cellulose-boron nitride dispersion liquid to form a deposition layer, and carrying out hot-pressing drying on the deposition layer; and the inner layer of the composite film is of a nano-cellulose-boron nitride composite single-layer structure, wherein the content of boron nitride is 1-7 wt%. The invention also discloses a preparation method thereof, which comprises the following steps: (1) mixing, stirring and ultrasonically crushing the nano-cellulose dispersion liquid and the boron nitride dispersion liquid to obtain nano-cellulose-boron nitride dispersion liquid; (2) and placing the dispersion on a mixed cellulose ester filter membrane for vacuum filtration to form a deposited layer, removing the mixed cellulose ester filter membrane, and carrying out hot-pressing drying on the deposited layer to obtain the inner layer of the composite film. The composite film provided by the invention has high heat conductivity coefficient and high hydrophobic insulation performance, and can be widely applied to the fields of electronic devices and biological materials.
Description
Technical Field
The invention relates to a functional nanocellulose-boron nitride composite film and a preparation method thereof, in particular to a heat-conducting insulating film with a hydrophobic function, and belongs to the field of heat-conducting composite materials.
Background
With the rapid development of electronic technology, devices such as communication circuits and semiconductors tend to be miniaturized and densified. When the high-power equipment runs at a high speed, a large amount of heat can be generated, and long-time use of the high-power equipment not only can affect the precision of electronic devices, but also can damage the equipment and further affect the service life of the equipment. It is therefore highly desirable to develop high performance thermal management devices with good heat dissipation characteristics. Most substrates of the heat-conducting plastic come from petrochemical products, are not easy to degrade after being discarded, and bring serious problems to economy and environment.
The nano-cellulose is rich in nature, generally has the diameter of less than 100nm and the length of 100nm to several micrometers, and has excellent strength, Young modulus, toughness and transparency. In addition, the material also has biodegradability, and is widely applied to the fields of electronic devices, biological materials, aerospace and the like. Meanwhile, the use of the nano-cellulose is limited by some defects, for example, the nano-cellulose has poor heat conduction performance, cannot dissipate heat in time when used as an electronic device material, and shortens the service life of the device. Therefore, besides ensuring the excellent comprehensive performance of the nano-cellulose, how to effectively improve the heat-conducting property of the nano-cellulose has attracted great interest of researchers.
Hexagonal boron nitride belongs to the hexagonal system and has a layered structure similar to graphite, so that it is called white graphite. Each layer is formed into a hexagonal ring structure by arranging nitrogen atoms and boron atoms alternately, and the atoms in the layers are connected through covalent bonds and are tightly combined; the layers are connected through molecular bonds, and the interaction force is weak, so the peeling is easy. Boron nitride has excellent performance, the heat conductivity coefficient in the in-plane direction is as high as 400W/(m.K), and boron nitride is the material with the best heat conductivity among the existing ceramic materials. Further, boron nitride has a large forbidden band width (5.9eV), and therefore has excellent electrical insulation (high resistivity, low dielectric constant, low dielectric loss) and a room temperature resistivity of 1016-1018Omega cm, resistivity at 2000 ℃ can reach 104Omega cm, is an excellent high-temperature insulating material. The excellent characteristics of boron nitride make the boron nitride have potential application in the fields of heat management materials, aerospace, supercapacitors and the like.
In the prior art, the invention of Chinese patent application 201711313427.7 discloses a multilayer composite heat-conducting film and a preparation method thereof. The interlayer of the heat-conducting film is a nano-cellulose film, the upper surface and the lower surface of the nano-cellulose film are respectively coated with a nano-cellulose/graphene film layer or (and) a nano-cellulose/boron nitride film layer in sequence, the layers are connected through hydrogen bonding between cellulose matrixes to form an ABA three-layer structure and an ACBCA five-layer structure composite heat-conducting film, and the mass range of each layer of the film is 15-30 mg; the content of graphene in the nano-cellulose/graphene film layer is 6-10 wt%; the content of boron nitride in the nano-cellulose/boron nitride film layer is 6-10 wt%. The boron nitride and the graphene have higher thermal conductivity, so that the film has higher thermal conductivity; the core of the middle cellulose layer is toughened and has a multi-layer bionic structure, so that the middle cellulose layer has excellent mechanical properties; the outer layer is a mixed layer of boron nitride and cellulose, so that the film has good electrical insulation. The invention can solve the heat dissipation problem of modern electronic devices and is applied to heat-conducting and heat-dissipating components.
However, the composite film in the invention has more layers, the preparation process is complex and stable mass production is difficult; meanwhile, as the specific surface area of the nano-cellulose is very large, and the surface contains abundant hydroxyl groups, the hydrophilicity is strong, once water drops are adhered to the surface of the composite material, the material is seriously damaged; on the other hand, strong hydrogen bonding is easily formed between hydroxyl groups, so that the nano-cellulose is agglomerated, and the biocompatibility between the nano-cellulose and a hydrophobic matrix is poor, so that the composite film has no hydrophobicity, the application of the composite film in actual life is limited to a great extent, and various requirements (simultaneously having heat conduction, insulation and hydrophobic properties) in the fields of electronic devices and biological materials are difficult to meet.
Therefore, aiming at various requirements in the fields of electronic devices and biological materials, research on providing a novel composite film which has good heat conduction, insulation and hydrophobic functions, has few layers and is convenient to prepare becomes more urgent.
Disclosure of Invention
The invention aims to provide a functional nano cellulose-boron nitride composite film with few layers and good heat conduction, insulation and hydrophobic functions aiming at the defects in the prior art; meanwhile, the preparation method is convenient to operate, easy to produce in large scale and stable in product quality.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a functional nano cellulose-boron nitride composite film is characterized in that the functional nano cellulose-boron nitride composite film is a composite film inner layer prepared by carrying out suction filtration on a mixed cellulose ester microporous filter membrane by using nano cellulose-boron nitride dispersion liquid to form a deposition layer, and carrying out hot-pressing drying on the deposition layer; and the inner layer of the composite film is of a nano-cellulose-boron nitride composite single-layer structure, wherein the content of boron nitride is 1-7 wt%.
Wherein, the diameter of the mixed cellulose ester filter membrane is 44mm, and the aperture is 0.45 um.
The functional nano-cellulose-boron nitride composite film is characterized in that the upper surface and the lower surface of the inner layer of the composite film are respectively provided with a hydrophobic outer layer formed by a modified organic silicon material, and the outer layer completely covers the inner layer of the composite film to form the functional nano-cellulose-boron nitride composite film.
The method for preparing the functional nano cellulose-boron nitride composite film is characterized by comprising the following steps:
(1) respectively adding a set amount of nano-cellulose and boron nitride into deionized water of a dispersant to prepare nano-cellulose dispersion liquid and boron nitride dispersion liquid, then mixing the nano-cellulose dispersion liquid and the boron nitride dispersion liquid, stirring, and ultrasonically crushing to obtain nano-cellulose-boron nitride dispersion liquid;
(2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a mixed cellulose ester filter membrane for vacuum filtration to form a deposition layer, then removing the mixed cellulose ester filter membrane, and carrying out hot-pressing drying on the deposition layer to obtain a composite membrane inner layer;
(3) and respectively spraying a layer of modified organosilicon material on the upper surface and the lower surface of the inner layer of the composite film, and drying to form a hydrophobic outer layer to obtain the functional nano-cellulose-boron nitride composite film.
The diameter of the mixed cellulose ester filter membrane in the step (2) is 44mm, and the aperture is 0.45 um.
Has the advantages that:
the nano-cellulose-boron nitride composite film and the preparation method thereof have the following advantages:
(1) the nano-cellulose-boron nitride composite film provided by the invention has few layers (a single-layer or three-layer structure), high thermal conductivity and high hydrophobic insulation performance, and can be widely applied to the fields of electronic devices and biological materials.
(2) The material provided by the inventionThe preparation method is characterized in that a hot-pressing drying method is adopted to promote the molecular chains of the nano-cellulose and the boron nitride to be oriented and arranged along the in-plane direction. Due to the hydrolysis reaction, the boron nitride after ultrasonic stripping contains hydroxyl and amino at the edge, and hydrogen bonds are formed between the boron nitride and the hydroxyl on the surface of the nanocellulose, so that the boron nitride can not be agglomerated and is uniformly dispersed in the nanocellulose matrix. Moreover, the hydrogen bond between the nano-cellulose and the boron nitride enables the boron nitride to form a good heat conduction path in the matrix, and when the content of the boron nitride is 7%, the in-plane heat conduction coefficient of the composite film can reach 11.8 W.m-1·K-1。
(3) The outer side of the film of the invention adopts modified organosilicon materials such as silicon dioxide and the like after being treated by silane and the like, because the surface of the film contains a large amount of methyl, the film is tightly combined with the inner layer of the composite film, and simultaneously, the hydrophobicity of the outer surface of the film can be obviously improved, and the application range of the composite film is obviously expanded.
(4) The preparation method has compact production process, easy implementation, suitability for industrial large-scale production and stable product quality.
Drawings
Fig. 1 is a hydrophobic pattern of a functional nanocellulose-boron nitride composite film prepared in example 1.
Fig. 2 is a hydrophobic pattern of the functional nanocellulose-boron nitride composite film prepared in example 2.
Fig. 3 is a hydrophobic pattern of the functional nanocellulose-boron nitride composite film prepared in example 3.
Fig. 4 is a hydrophobic pattern of the functional nanocellulose-boron nitride composite film prepared in example 4.
The invention is described in further detail below with reference to the figures and the embodiments.
Detailed Description
Example 1:
the functional nanocellulose-boron nitride composite film provided by the embodiment is a composite film inner layer prepared by carrying out suction filtration on a mixed cellulose ester microporous filter membrane by using a nanocellulose-boron nitride dispersion solution to form a deposition layer, and carrying out hot-pressing drying on the deposition layer; and the inner layer of the composite film is of a nano-cellulose-boron nitride composite single-layer structure, wherein the content of boron nitride is 1-7 wt% (accounting for the dry matter content of the film).
Wherein, the diameter of the mixed cellulose ester filter membrane is 44mm, and the aperture is 0.45 um.
The upper surface and the lower surface of the inner layer of the functional nano-cellulose-boron nitride composite film are respectively provided with a hydrophobic outer layer formed by a modified organic silicon material, and the outer layer completely covers the inner layer of the composite film to form the functional nano-cellulose-boron nitride composite film.
A method for preparing the functional nano cellulose-boron nitride composite film comprises the following steps:
(1) respectively adding a set amount of nano-cellulose and boron nitride into deionized water of a dispersant to prepare nano-cellulose dispersion liquid and boron nitride dispersion liquid, then mixing the nano-cellulose dispersion liquid and the boron nitride dispersion liquid, stirring, and ultrasonically crushing to obtain nano-cellulose-boron nitride dispersion liquid;
(2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a mixed cellulose ester filter membrane for vacuum filtration to form a deposition layer (also called a filter cake), removing the mixed cellulose ester filter membrane, and carrying out hot-pressing drying on the deposition layer to obtain an inner layer of the composite film;
(3) and respectively spraying a layer of modified organosilicon material on the outer surfaces of the upper side and the lower side of the inner layer of the composite film, and drying to form a hydrophobic outer layer to obtain the functional nano cellulose-boron nitride composite film.
Specifically, the preparation method comprises the following steps:
(1) respectively adding 0.0007g of boron nitride and 0.0693g of nanocellulose into a dispersing agent, respectively preparing a boron nitride dispersion liquid with the concentration of 2.2mg/mL and a nanocellulose dispersion liquid with the concentration of 1.5mg/mL, then mixing the nanocellulose dispersion liquid and the boron nitride dispersion liquid, stirring for 30min, continuing to perform ultrasonic treatment on a cell crusher (80W) for 15min, and uniformly dispersing to obtain a nanocellulose-boron nitride dispersion liquid, wherein the dispersing agent is deionized water;
(2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a film (a mixed cellulose ester microporous filter membrane with the diameter of 44mm and the aperture of 0.45um) for suction filtration to form a deposition layer; thoroughly cleaning the settled layer by deionized water to remove impurities; carefully taking down the deposition layer, clamping the deposition layer between steel plates with certain pressure, heating to 50 ℃ and continuously drying for 12h to obtain the inner layer of the nano cellulose-boron nitride composite film.
(3) And spraying 1.5mg/mL silane modified silicon dioxide ethanol dispersion liquid on the upper and lower side surfaces of the inner layer of the composite film, and naturally drying to obtain the heat-conducting and insulating nanocellulose-boron nitride composite film with the hydrophobic function.
The functional nanocellulose-boron nitride composite film prepared in example 1 was subjected to a plurality of tests by a laser flash method, and the results were as follows: the in-plane thermal conductivity of the composite film was 7.3 W.m-1·K-1The hydrophobic property after the contact angle test is shown in figure 1, and the contact angle is 134.1 degrees.
Example 2: the functional nanocellulose-boron nitride composite film and the preparation method thereof provided by the embodiment are basically the same as the embodiment 1, and the difference is that:
(1) respectively adding 0.0021g of boron nitride and 0.0679g of nanocellulose into a dispersing agent, respectively preparing a boron nitride dispersion liquid with the concentration of 2.2mg/mL and a nanocellulose dispersion liquid with the concentration of 1.5mg/mL, then mixing the nanocellulose dispersion liquid and the boron nitride dispersion liquid, stirring for 30min, continuing to perform ultrasonic treatment on a cell crusher (80W) for 15min, and uniformly dispersing to obtain a nanocellulose-boron nitride dispersion liquid, wherein the dispersing agent is deionized water.
(2) And (2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a film (a mixed cellulose ester microporous filter membrane with the diameter of 44nm and the aperture of 0.45um) for suction filtration to form a deposition layer, and thoroughly cleaning the obtained deposition layer by using deionized water to remove impurities. Carefully taking down the deposition layer, clamping the deposition layer between steel plates with certain pressure, heating to 50 ℃, and continuously drying for 12 hours to obtain the inner layer of the nano cellulose-boron nitride composite film;
(3) and spraying 1.5mg/mL ethanol dispersion of silane modified silicon dioxide on the surfaces of the two sides of the inner layer of the composite film, and naturally drying to obtain the functional nanocellulose-boron nitride composite film with the hydrophobic function.
The nanocellulose-boron nitride composite film prepared in example 2 was subjected to a plurality of tests by a laser flash method, and the results were as follows: the in-plane thermal conductivity of the composite film was 7.8 W.m-1·K-1The hydrophobic property is shown in figure 2, and the contact angle is 145.0 degrees.
Example 3:
the functional nanocellulose-boron nitride composite film and the preparation method thereof provided by the embodiment are basically the same as the embodiments 1 and 2, and the difference is that:
(1) respectively adding 0.0035g of boron nitride and 0.0665g of nanocellulose into a dispersing agent, respectively preparing a boron nitride dispersion liquid with the concentration of 2.2mg/mL and a nanocellulose dispersion liquid with the concentration of 1.5mg/mL, then mixing the nanocellulose dispersion liquid and the boron nitride dispersion liquid, stirring for 30min, continuing to perform ultrasonic treatment on a cell crusher (80W) for 15min to uniformly disperse the mixture to obtain a nanocellulose-boron nitride dispersion liquid, wherein the dispersing agent is deionized water;
(2) and (2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a film (a mixed cellulose ester microporous filter membrane with the diameter of 44mm and the aperture of 0.45um) for suction filtration to obtain a deposition layer, and thoroughly cleaning the deposition layer by using deionized water to remove impurities. Carefully taking down the deposition layer, clamping the deposition layer between steel plates with certain pressure, heating to 50 ℃, and continuously drying for 12 hours to obtain the inner layer of the nano cellulose-boron nitride composite film;
(3) and spraying 1.5mg/mL ethanol dispersion of silane modified silicon dioxide on the surfaces of the two sides of the inner layer of the composite film, and naturally drying to obtain the heat-conducting and insulating nanocellulose-boron nitride composite film with the hydrophobic function.
The nanocellulose-boron nitride composite film prepared in example 3 was subjected to a plurality of tests by a laser flash method, and the results were as follows: the in-plane thermal conductivity of the composite film was 9.7 W.m-1·K-1The hydrophobic property is shown in figure 3, and the contact angle is 135.9 degrees.
Example 4: the functional nanocellulose-boron nitride composite film and the preparation method thereof provided by the embodiment are basically the same as those in the embodiments 1 to 3, and the difference is that:
(1) respectively adding 0.0049g of boron nitride and 0.0651g of nanocellulose into a dispersing agent, respectively preparing a boron nitride dispersion liquid with the concentration of 2.2mg/mL and a nanocellulose dispersion liquid with the concentration of 1.5mg/mL, then mixing the nanocellulose dispersion liquid and the boron nitride dispersion liquid, stirring for 30min, continuing to perform ultrasonic treatment on a cell crusher (80W) for 15min, and uniformly dispersing to obtain a nanocellulose-boron nitride dispersion liquid, wherein the dispersing agent is deionized water;
(2) and (2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a film (a mixed cellulose ester filter membrane, the diameter of which is 44mm, and the aperture of which is 0.45um) for suction filtration to obtain a deposition layer, and thoroughly cleaning the deposition layer by using deionized water to remove impurities. Carefully taking down the deposition layer, clamping the deposition layer between steel plates with certain pressure, heating to 50 ℃, and continuously drying for 12 hours to obtain the inner layer of the nano cellulose-boron nitride composite film;
(3) and spraying 1.5mg/mL ethanol dispersion of silane modified silicon dioxide on the surfaces of the two sides of the inner layer of the composite film, and naturally drying to obtain the heat-conducting insulating composite film with the hydrophobic function.
The nanocellulose-boron nitride composite film prepared in example 4 was subjected to a plurality of tests by a laser flash method, and the results were as follows: the in-plane thermal conductivity of the composite film was 11.8 W.m-1·K-1The hydrophobic property is shown in figure 4, and the contact angle is 144.9 degrees.
The present invention is not limited to the above embodiments, and other nano-cellulose-boron nitride composite films obtained by the same or similar methods and the preparation methods thereof, such as the similar components, proportions, steps, etc., are within the protection scope of the present invention.
Claims (2)
1. A functional nano-cellulose-boron nitride composite film is characterized in that a nano-cellulose-boron nitride dispersion liquid forms a deposition layer after being filtered on a mixed cellulose ester microporous filter membrane, and the deposition layer is dried by hot pressing to ensure that a nano-cellulose molecular chain and boron nitride are arranged along the in-plane direction in an oriented manner to form a composite film inner layer; the inner layer of the composite film is of a nano-cellulose-boron nitride composite single-layer structure, wherein the content of boron nitride is 1-7 wt%; the diameter of the mixed cellulose ester filter membrane is 44mm, and the aperture is 0.45 um; the upper surface and the lower surface of the inner layer of the composite film are respectively provided with a hydrophobic outer layer formed by silane modified silicon dioxide materials, the outer layer completely covers the inner layer of the composite film, the surface of the outer layer contains a large amount of methyl, and the methyl is tightly combined with the inner layer of the composite film so as to remarkably improve the hydrophobicity of the outer surface of the outer layer and form the functional nano cellulose-boron nitride composite film.
2. A method for preparing the functional nanocellulose-boron nitride composite film as described in claim 1, characterized by comprising the steps of:
(1) respectively adding a set amount of nano-cellulose and boron nitride into deionized water of a dispersing agent to prepare nano-cellulose dispersion liquid and boron nitride dispersion liquid, then mixing the nano-cellulose dispersion liquid and the boron nitride dispersion liquid, stirring, and ultrasonically crushing to obtain nano-cellulose-boron nitride dispersion liquid;
(2) placing the nano cellulose-boron nitride dispersion liquid obtained in the step (1) on a mixed cellulose ester filter membrane for vacuum filtration to form a deposition layer, removing the mixed cellulose ester filter membrane, and carrying out hot-pressing drying on the deposition layer to obtain an inner layer of the composite film; the diameter of the mixed cellulose ester filter membrane is 44mm, and the aperture is 0.45 um;
(3) and the upper surface and the lower surface of the inner layer of the composite film are respectively sprayed with a silane modified silicon dioxide outer layer, the inner layer of the composite film is completely coated by the outer layers, the surface of the outer layers contains a large amount of methyl, the methyl is tightly combined with the inner layer of the composite film to obviously improve the hydrophobicity of the outer surface of the outer layers, and the hydrophobic outer layers are formed after drying to prepare the functional nano cellulose-boron nitride composite film.
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| CN113416334B (en) * | 2021-07-09 | 2022-09-23 | 陕西科技大学 | Hydroxyethyl cellulose/boron nitride nano composite film and preparation method thereof |
| CN113861947B (en) * | 2021-08-13 | 2023-02-24 | 中国地质大学（武汉） | Boron nitride dispersion method using macromolecules as templates |
| CN114316376B (en) * | 2022-01-11 | 2022-12-27 | 陕西科技大学 | CNF/BNNS composite dispersion liquid, film and preparation method |
| CN114573932A (en) * | 2022-03-16 | 2022-06-03 | 北京大学 | High-thermal-conductivity boron nitride paper based on large-sheet intrinsic hexagonal boron nitride and preparation method thereof |
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| CN105566502A (en) * | 2015-12-21 | 2016-05-11 | 同济大学 | Preparation method of waterproof renewable nano cellulose thin film |
| CN106977773A (en) * | 2017-04-21 | 2017-07-25 | 深圳先进技术研究院 | A kind of boron nitride nano-tube nano-cellulose fiber composite and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN105566502A (en) * | 2015-12-21 | 2016-05-11 | 同济大学 | Preparation method of waterproof renewable nano cellulose thin film |
| CN106977773A (en) * | 2017-04-21 | 2017-07-25 | 深圳先进技术研究院 | A kind of boron nitride nano-tube nano-cellulose fiber composite and preparation method thereof |
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