CN108976448B - Ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles and preparation method thereof - Google Patents
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Abstract
A ternary composite film reinforced by a hydrogen bond network and magnetic nanoparticles and a preparation method thereof are disclosed. The invention provides a simple film forming method, and the composite film utilizes a huge hydrogen bond network to construct a high-strength and high-toughness composite film, wherein the tensile stress and the toughness of the composite film are 303MPa and 10.28KJ/m respectively3Is 6.06 and 9.6 times of pure high molecular polymer, and simultaneously, the tensile stress of the composite film is larger than that of the graphene oxide and the high molecular polymer composite film due to the addition of the magnetic nano particles to increase the action of interfacial friction. In addition, the graphene oxide, the high polymer and the magnetic nanoparticle composite membrane have a remarkable heating effect under an alternating magnetic field, and in the future, the ternary composite membrane constructed by utilizing the hydrogen bond network and the magnetic nanoparticles can also help to manufacture other high-performance composite membranes.
Description
Technical Field
The invention relates to a hydrogen bond network and magnetic nanoparticle reinforced ternary composite film and a preparation method thereof, in particular to a preparation method of a hydrogen bond network and nanoparticle reinforced graphene oxide-high molecular polymer-magnetic nanoparticle composite material, and belongs to the field of nano material compounding.
Background
The surface of the graphene oxide has a large number of oxygen-containing functional groups, and the graphene oxide is easy to generate hydrogen bond action with a high molecular polymer and is widely applied to the field of nano composite materials. The composite material with excellent mechanical property can be prepared by adding a proper amount of graphene oxide solution into the high molecular polymer. In recent years, researchers have also continuously made efforts to prepare high-performance organic-graphene oxide composite materials from various high molecular polymers.
According to Small of Germany (2015, 11 th, 4298. sup. 4302 th page), the konjac glucomannan-graphene oxide composite membrane is prepared by evaporation assembly, the two substances are connected through hydrogen bonds, and when the addition of the graphene oxide is only 7.5%, the mechanical property of the composite membrane is improved by 151.6% compared with that of a pure konjac glucomannan membrane and reaches 183.3 MPa. The ACS Nano (ACS Nano 2015, volume 9, page 8165 and 8175) in the United states reports that a composite film of graphene oxide and sodium alginate is prepared by a suction filtration method, the two materials are linked through hydrogen bonds, the mechanical property is greatly improved compared with the original material, the stress can reach 272.3Mpa, and the toughness can reach 12.5 MJ/m3。
In the composite membrane system, the mechanical property of the composite membrane can be enhanced and the composite membrane is endowed with multiple functions by adding nano-particles. Carbohydrate Polymers (Carbohydrate Polymers, 2013, volume 92, page 1781-1791) in the Netherlands report a ferroferric oxide-multilayer carbon nanotube-chitosan ternary composite material, wherein ferroferric oxide can play a role in enhancing interlayer friction and simultaneously plays a synergistic role in enhancing the whole system mechanics. The mechanical property of the ternary composite film is improved by 159 percent compared with that of pure chitosan. And the conductivity of the composite film reaches up to 105 mu S/cm. In ACS Nano (ACS Nano 2015, volume 9, page 2167-2172), a transparent ternary composite membrane is prepared from silica nanosheets, silica nanoparticles and PVA, wherein silicon-oxygen bonds in silica are easy to generate hydrogen bonding with hydrogen-oxygen bonds in PVA, and the silica nanoparticles growing on the silica nanosheets can increase the roughness between layers and further improve the mechanical property of the composite membrane. The final stress of the composite membrane reinforced by hydrogen bonds and nano particles can reach 31.6MPa, while the pure PVA membrane is only 13.5 MPa.
Disclosure of Invention
The invention aims to provide a ternary composite film reinforced by utilizing a hydrogen bond network and magnetic nanoparticles and a preparation method thereof.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a preparation method of a ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles comprises the following steps:
the first step is as follows: dropwise adding the graphene oxide aqueous solution into the high-molecular polymer aqueous solution, and stirring to obtain a dispersed graphene oxide-high-molecular polymer dispersion liquid;
the second step is that: dropwise adding a magnetic nano-particle aqueous solution with the particle size of 20-100nm into the graphene oxide-high molecular polymer dispersion liquid, and stirring to obtain a dispersed graphene oxide-high molecular polymer-magnetic nano-particle dispersion liquid;
the third step: preparing the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid into a film by a spraying assembly method.
The preferable technical scheme is as follows: the concentration of the graphene oxide aqueous solution is 1-10mg/mL, the concentration of the high molecular polymer aqueous solution is 1-10mg/mL, and the concentration of the magnetic nanoparticle aqueous solution is 100-500 mu g/mL.
The preferable technical scheme is as follows: the graphene oxide-high molecular polymer dispersion liquid comprises 1-50% of graphene oxide by mass.
The preferable technical scheme is as follows: the mass content of the graphene oxide in the graphene oxide-high molecular polymer dispersion liquid is 2-20%.
The preferable technical scheme is as follows: the mass content of the nanoparticles in the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid is 1-10%.
The preferable technical scheme is as follows: the high molecular polymer aqueous solution is prepared by dispersing thiolated chitosan in water.
The preferable technical scheme is as follows: the magnetic nano particle aqueous solution is prepared by dispersing ferroferric oxide coated by polyethylene glycol in water.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles is characterized in that: the prepared graphene oxide-high molecular polymer-magnetic nanoparticle ternary composite film has the tensile stress and the toughness of 303MPa and 10.28MJ/m respectively3。
Drawings
FIG. 1 is a cross-sectional scanning electron micrograph (SEM, Zeiss Supra 40, Germany) of a 1%, 3%, 6%, 9% graphene oxide-thiolated chitosan composite film and optical photographs (a-d) of the composite film.
FIG. 2 shows the cross-sectional scanning electron microscope (a), Mapping energy spectrum (b-c) and scanning electron microscope (EDX) (d) of the composite film of 6% graphene oxide-thiolated chitosan-1.25% ferroferric oxide, and the cross-sectional scanning electron microscopes (e-h) of the composite films of different thicknesses.
Fig. 3 is an XRD spectrum (a) of a graphene oxide-thiolated chitosan composite film and a graphene oxide-thiolated chitosan-ferroferric oxide composite film with different graphene oxide contents, an infrared spectrum (b) of graphene oxide, graphene oxide-thiolated chitosan and a graphene oxide-thiolated chitosan-ferroferric oxide composite material, an xps total spectrum (c), an Fe2pX ray photoelectron spectrum (d), S2pX ray photoelectron spectrum analysis data (e) of a thiolated chitosan film and (f) of a graphene oxide-thiolated chitosan-ferroferric oxide composite film.
Fig. 4 shows stress (a) and toughness (b) of graphene oxide-thiolated chitosan composite films with different graphene oxide contents, and stress (c) and toughness (d) of graphene oxide-thiolated chitosan-ferroferric oxide composite films with different ferroferric oxide contents and 6%.
FIG. 5 is a temperature rise curve of a 6% graphene oxide-thiolated chitosan-ferroferric oxide composite membrane with different ferroferric oxide contents in an alternating magnetic field of 30KA/m, wherein the room temperature is 28 ℃.
FIG. 6 is a schematic view of a process for preparing a ternary composite film.
In the above figures, 1, thiolated chitosan; 2. ferroferric oxide; 3. polyethylene glycol coated ferroferric oxide graphene oxide.
Due to the application of the technical scheme, compared with the prior art, the invention has the advantages that:
1. the invention provides a simple and feasible preparation method of a graphene oxide-high molecular polymer-magnetic nanoparticle composite membrane, which comprises the steps of obtaining uniformly mixed graphene oxide-high molecular polymer dispersion liquid with different proportions by continuously stirring, adding magnetic nanoparticle solutions with different volumes, and carrying out spraying assembly to obtain the graphene oxide-high molecular polymer-magnetic nanoparticle composite membrane with different proportions.
2. According to the graphene oxide-high molecular polymer-magnetic nanoparticle composite film, a hydrogen bond network is successfully formed in a ternary composite, and magnetic nanoparticles are introduced, so that the tensile stress (303 MPa) of the 6% graphene oxide-high molecular polymer-1.25% magnetic nanoparticle composite film is far greater than that of a high molecular polymer film (50 MPa) and the 6% graphene oxide-high molecular polymer (207 MPa).
3. The tensile stress and the toughness of the 6% graphene oxide-high molecular polymer-1.25% magnetic nanoparticle composite membrane obtained by the method are respectively 6.06 times and 9.6 times of those of a pure high molecular polymer.
4. The tensile stress and toughness of the 6% graphene oxide-high molecular polymer-1.25% magnetic nanoparticle composite film obtained by the method are respectively 1.46 times and 1.61 times of those of the 6% graphene oxide-high molecular polymer.
5. The graphene oxide-high molecular polymer-magnetic nanoparticle composite membrane prepared by the method has good controllability, and the size and the thickness of the composite membrane can be regulated and controlled.
6. Under an alternating magnetic field (30 KA/m), the graphene oxide-high molecular polymer-magnetic nanoparticles have a good temperature rising effect. Within 80 seconds, the temperature of 6% graphene oxide-thiolated chitosan-1.25% ferroferric oxide can be raised to 45 ℃.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Referring to fig. 1 to 6, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the present disclosure without affecting the functions and purposes of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Comparative example:
the preparation method of the graphene oxide-thiolated chitosan composite membrane comprises the following steps:
preparing 10mg/mL aqueous solution from graphene oxide; the thiolated chitosan was prepared as a 10mg/mL aqueous solution.
0.081mL of 10mg/mL of graphene oxide aqueous solution is dropwise added into 7.92mL of 10mg/mL of thiolated chitosan solution, and the mixture is stirred for 12 hours by a magnetic stirring device to obtain a uniformly dispersed 1% graphene oxide-thiolated chitosan dispersion liquid.
And (3) preparing a film from the 1% graphene oxide-thiolated chitosan dispersion liquid by using a glass sheet as a substrate through a spraying self-assembly method, so as to obtain the 1% graphene oxide-thiolated chitosan composite film.
The scanning electron microscope image (fig. 1 (a)) of the prepared 1% graphene oxide-thiolated chitosan composite film can show that the graphene oxide-thiolated chitosan composite film is compact and has no obvious layered structure, and the mechanical property test shows that the tensile stress and the toughness of the 1% graphene oxide-thiolated chitosan composite film are 85MPa and 1.08KJ/m respectively3As shown in fig. 4 (a-b).
Comparative example 2:
the preparation method of the graphene oxide-thiolated chitosan composite membrane comprises the following steps:
preparing 10mg/mL aqueous solution from graphene oxide; preparing sulfhydrylation chitosan into 10mg/mL aqueous solution;
0.247mL of 10mg/mL of graphene oxide aqueous solution is dropwise added into 7.75mL of 10mg/mL of thiolated chitosan solution, and stirred for 12 hours by using a magnetic stirring device to obtain a uniformly dispersed 3% graphene oxide-thiolated chitosan dispersion liquid.
And (3) preparing a film from the 3% graphene oxide-thiolated chitosan dispersion liquid by using a glass sheet as a substrate through a spraying self-assembly method, so as to obtain the 3% graphene oxide-thiolated chitosan composite film.
In a scanning electron microscope image (fig. 1 (b)) of the 3% graphene oxide-thiolated chitosan composite film prepared in this embodiment, it can be seen that the graphene oxide-thiolated chitosan composite film is relatively dense and has a relatively obvious layered structure, and a mechanical property test indicates that the tensile stress and the toughness of the 3% graphene oxide-thiolated chitosan composite film are 133MPa and 4.83KJ/m, respectively3As shown in fig. 4 (a-b).
Comparative example 3:
the preparation method of the graphene oxide-thiolated chitosan composite membrane comprises the following steps:
preparing 10mg/mL aqueous solution from graphene oxide; preparing sulfhydrylation chitosan into 10mg/mL aqueous solution;
0.48mL of 10mg/mL graphene oxide aqueous solution is dropwise added into 7.52mL of 10mg/mL thiolated chitosan solution, and stirred for 12 hours by using a magnetic stirring device to obtain a uniformly dispersed 6% graphene oxide-thiolated chitosan dispersion liquid.
c. And (3) preparing a film from the 6% graphene oxide-thiolated chitosan dispersion liquid by using a glass sheet as a substrate through a spraying self-assembly method, so as to obtain the 6% graphene oxide-thiolated chitosan composite film.
The scanning electron microscope image (fig. 1 (c)) of the prepared 6% graphene oxide-thiolated chitosan composite film shows that the graphene oxide-thiolated chitosan composite film has an obvious layered structure, and the mechanical property test shows that the tensile stress and the toughness of the 6% graphene oxide-thiolated chitosan composite film are 207MPa and 6.40KJ/m respectively3As shown in fig. 4 (a-b).
In FIG. 3 (b), the graphene oxide-thiolated chitosan composite material was at 1740cm-1The peak belonging to-C = O disappears, and the peak of C-O at 1230cm-1 moves towards the direction of high wave number, which indicates that hydrogen bond interaction occurs between graphene oxide and thiolated chitosan.
Comparative example 4:
the preparation method of the graphene oxide-thiolated chitosan composite membrane comprises the following steps:
a. preparing 10mg/mL aqueous solution from graphene oxide; preparing sulfhydrylation chitosan into 10mg/mL aqueous solution;
b. 0.79mL of 10mg/mL graphene oxide aqueous solution is dropwise added into 7.21mL of 10mg/mL thiolated chitosan solution, and stirred for 12 hours by using a magnetic stirring device to obtain a uniformly dispersed 9% graphene oxide-thiolated chitosan dispersion liquid.
c. And (3) preparing a film from the 9% graphene oxide-thiolated chitosan dispersion liquid by using a glass sheet as a substrate through a spraying self-assembly method, so as to obtain the 9% graphene oxide-thiolated chitosan composite film.
In the scanning electron microscope image (fig. 1 (d)) of the 9% graphene oxide-thiolated chitosan composite film prepared in this example, it can be seen that the graphene oxide-thiolated chitosan composite film also has an obvious layered structure, but the mechanical property test indicates that the 9% graphene oxide-thiolated chitosan composite film has an obvious layered structureThe tensile stress and the toughness of the-sulfhydrylation chitosan composite membrane are 164MPa and 5.32KJ/m respectively3As shown in fig. 4 (a-b).
Example 1: ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles and preparation method thereof
In this embodiment, the graphene oxide-thiolated chitosan-ferroferric oxide composite membrane is prepared by the following steps:
a. preparing 10mg/mL aqueous solution from graphene oxide; preparing sulfhydrylation chitosan into 10mg/mL aqueous solution; preparing ferroferric oxide coated by polyethylene glycol into 500 mug/mL aqueous solution;
b. 0.48mL of 10mg/mL graphene oxide aqueous solution is dropwise added into 7.52mL of 10mg/mL thiolated chitosan solution, and stirred for 12 hours by using a magnetic stirring device to obtain a uniformly dispersed 6% graphene oxide-thiolated chitosan dispersion liquid.
c. Dropwise adding 1mL of 500 mu g/mL polyethylene glycol coated ferroferric oxide solution, and stirring for 10 minutes to obtain uniformly dispersed 6% graphene oxide-thiolated chitosan-0.625% ferroferric oxide dispersion liquid.
d. A glass sheet is used as a substrate, and a film is prepared from 6% graphene oxide-thiolated chitosan-0.625% ferroferric oxide dispersion liquid by a spraying self-assembly method, so that the 6% graphene oxide-thiolated chitosan-0.625% ferroferric oxide composite film is obtained.
Mechanical tests of the 6% graphene oxide-thiolated chitosan-0.625% ferroferric oxide composite membrane prepared in the embodiment show that the tensile stress and the toughness of the 6% graphene oxide-thiolated chitosan-0.625% ferroferric oxide composite membrane are 267MPa and 12.34 KJ/m respectively3As shown in fig. 4 (c-d). As shown in FIG. 5, the composite film can be heated to 37.5 deg.C (room temperature 28 deg.C) in 80 seconds under 30KA/m alternating magnetic field.
Example 2: ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles and preparation method thereof
In this embodiment, the graphene oxide-thiolated chitosan-ferroferric oxide composite membrane is prepared by the following steps:
a. preparing 10mg/mL aqueous solution from graphene oxide; preparing sulfhydrylation chitosan into 10mg/mL aqueous solution; preparing ferroferric oxide coated by polyethylene glycol into 500 mu g/mL aqueous solution;
b. 0.48mL of 10mg/mL graphene oxide aqueous solution is dropwise added into 7.52mL of 10mg/mL thiolated chitosan solution, and stirred for 12 hours by using a magnetic stirring device to obtain a uniformly dispersed 6% graphene oxide-thiolated chitosan dispersion liquid.
c. Dropwise adding 2.04mL of ferroferric oxide solution coated by 500 mu g/mL of polyethylene glycol, and stirring for 10 minutes to obtain uniformly dispersed 6% graphene oxide-sulfhydrylation chitosan-1.25% ferroferric oxide dispersion liquid.
d. A glass sheet is used as a substrate, and a film is prepared from 6% graphene oxide-thiolated chitosan-1.25% ferroferric oxide dispersion liquid by a spraying self-assembly method, so that the 6% graphene oxide-thiolated chitosan-1.25% ferroferric oxide composite film is obtained.
The scanning electron microscope image (fig. 2 (a)) of the 6% graphene oxide-thiolated chitosan-1.25% ferroferric oxide composite film prepared in the embodiment can show that the composite film has an obvious layered structure, and Mapping energy spectrum and scanning electron microscope energy spectrum (EDX) show that the composite film contains sulfur, iron and other characteristic elements and is uniformly distributed (fig. 2 (b-d)). Composite films with different thicknesses can be prepared by regulating and controlling the volume of 6% graphene oxide-thiolated chitosan-1.25% ferroferric oxide dispersion liquid through spray coating self-assembly, and the figure is a cross-sectional scanning electron microscope image of the composite films with different thicknesses prepared in the embodiment shown in fig. 2 (e-h). Mechanical tests show that the tensile stress and the toughness of the 6 percent graphene oxide-sulfhydrylation chitosan-1.25 percent ferroferric oxide composite membrane are 308MPa and 10.28KJ/m respectively3. As shown in FIG. 5, the composite film can be heated to 45 deg.C (room temperature is 28 deg.C) in 80 seconds under 30KA/m alternating magnetic field.
In fig. 3 (b), the peak of the graphene oxide-thiolated chitosan-ferroferric oxide composite material belonging to-C = O at 1740cm-1 disappears, and the peak of C-O at 1230cm-1 moves in the direction of high wavenumber, which indicates that hydrogen bonding occurs between the graphene oxide, the thiolated chitosan and the ferroferric oxide.
FIG. 3 (e) is the S2p peak of pure thiolated chitosan, and as shown, S2p of pure thiolated chitosan can be separated into two peaks, 163.5eV is the peak for carbon-sulfur bonds, and 164.4eV is the peak for sulfur-hydrogen bonds.
Fig. 3 (f) shows the S2p partial peak of the graphene oxide-thiolated chitosan-ferroferric oxide composite material, and shows that peaks at 163.6 and 164.8ev are peaks of carbon-sulfur bonds, and peaks at 168.0 and 169.2 are peaks of thioester bonds, so that it can be seen that some thioester bonds are still present in the graphene oxide-thiolated chitosan-ferroferric oxide composite material.
Example 3: ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles and preparation method thereof
The preparation process is shown in fig. 6, the preparation process of the graphene oxide-thiolated chitosan composite membrane is also shown in fig. 6, and the preparation of the thiolated chitosan-oxide composite membrane is performed according to the following steps:
a. preparing 10mg/mL aqueous solution from graphene oxide; preparing sulfhydrylation chitosan into 10mg/mL aqueous solution; preparing ferroferric oxide coated by polyethylene glycol into 500 mu g/mL aqueous solution;
b. 0.48mL of 10mg/mL graphene oxide aqueous solution is dropwise added into 7.52mL of 10mg/mL thiolated chitosan solution, and stirred for 12 hours by using a magnetic stirring device to obtain a uniformly dispersed 6% graphene oxide-thiolated chitosan dispersion liquid.
c. 4.1mL of ferroferric oxide solution coated by 500 mu g/mL of polyethylene glycol is dripped and stirred for 10 minutes to obtain uniformly dispersed 6 percent graphene oxide-thiolated chitosan-2.5 percent nanoparticle dispersion liquid.
d. A glass sheet is used as a substrate, and a film is prepared from 6% graphene oxide-thiolated chitosan-0.625% ferroferric oxide dispersion liquid by a spraying self-assembly method, so that the 6% graphene oxide-thiolated chitosan-2.5% nanoparticle composite film is obtained.
The mechanical test of the 6% graphene oxide-thiolated chitosan-2.5% nanoparticle composite membrane prepared in this example shows that the tensile stress of the 6% graphene oxide-thiolated chitosan-2.5% ferroferric oxide composite membraneAnd toughness of 164MPa and 3.77 KJ/m3As shown in fig. 4 (c-d). As shown in FIG. 5, the composite film can be heated to 50.1 deg.C (room temperature 28 deg.C) in 80 seconds under 30KA/m alternating magnetic field.
Example 4: ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles and preparation method thereof
A preparation method of a ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles comprises the following steps:
the first step is as follows: dropwise adding the graphene oxide aqueous solution into the high-molecular polymer aqueous solution, and stirring to obtain a dispersed graphene oxide-high-molecular polymer dispersion liquid;
the second step is that: dropwise adding a magnetic nano-particle water solution with the particle size of 50nm into the graphene oxide-high molecular polymer dispersion liquid, and stirring to obtain a dispersed graphene oxide-high molecular polymer-magnetic nano-particle dispersion liquid;
the third step: preparing the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid into a film by a spraying assembly method.
The preferred embodiment is: the concentration of the graphene oxide aqueous solution is 5mg/mL, the concentration of the high molecular polymer aqueous solution is 5mg/mL, and the concentration of the magnetic nanoparticle aqueous solution is 300 mug/mL.
The preferred embodiment is: the graphene oxide-high molecular polymer dispersion liquid contains 25% by mass of graphene oxide.
The preferred embodiment is: the mass content of the graphene oxide in the graphene oxide-high molecular polymer dispersion liquid is 11%.
The preferred embodiment is: the mass content of the nanoparticles in the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid is 5%.
The preferred embodiment is: the high molecular polymer aqueous solution is prepared by dispersing thiolated chitosan in water.
The preferred embodiment is: the magnetic nano particle aqueous solution is prepared by dispersing ferroferric oxide coated by polyethylene glycol in water.
Example 5: ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles and preparation method thereof
A preparation method of a ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles comprises the following steps:
the first step is as follows: dropwise adding the graphene oxide aqueous solution into the high-molecular polymer aqueous solution, and stirring to obtain a dispersed graphene oxide-high-molecular polymer dispersion liquid;
the second step is that: dropwise adding a magnetic nano-particle aqueous solution with the particle size of 100nm into the graphene oxide-high molecular polymer dispersion liquid, and stirring to obtain a dispersed graphene oxide-high molecular polymer-magnetic nano-particle dispersion liquid;
the third step: preparing the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid into a film by a spraying assembly method.
The preferred embodiment is: the concentration of the graphene oxide aqueous solution is 10mg/mL, the concentration of the high molecular polymer aqueous solution is 10mg/mL, and the concentration of the magnetic nanoparticle aqueous solution is 500 mug/mL.
The preferred embodiment is: the graphene oxide-high molecular polymer dispersion liquid contains 50% by mass of graphene oxide.
The preferred embodiment is: the mass content of the graphene oxide in the graphene oxide-high molecular polymer dispersion liquid is 20%.
The preferred embodiment is: the mass content of the nanoparticles in the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid is 10%.
The preferred embodiment is: the high molecular polymer aqueous solution is prepared by dispersing thiolated chitosan in water.
The preferred embodiment is: the magnetic nano particle aqueous solution is prepared by dispersing ferroferric oxide coated by polyethylene glycol in water.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A preparation method of a ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles is characterized by comprising the following steps: comprises the following steps:
the first step is as follows: dropwise adding the graphene oxide aqueous solution into the high-molecular polymer aqueous solution, and stirring to obtain a dispersed graphene oxide-high-molecular polymer dispersion liquid;
the second step is that: dropwise adding a magnetic nano-particle aqueous solution with the particle size of 20-100nm into the graphene oxide-high molecular polymer dispersion liquid, and stirring to obtain a dispersed graphene oxide-high molecular polymer-magnetic nano-particle dispersion liquid;
the third step: preparing the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid into a film by a spraying assembly method;
the magnetic nano particle aqueous solution is prepared by dispersing ferroferric oxide coated by polyethylene glycol in water;
the mass content of the nanoparticles in the graphene oxide-high molecular polymer-magnetic nanoparticle dispersion liquid is 1-10%.
2. The preparation method of the ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles according to claim 1, characterized in that: the concentration of the graphene oxide aqueous solution is 1-10mg/mL, the concentration of the high molecular polymer aqueous solution is 1-10mg/mL, and the concentration of the magnetic nanoparticle aqueous solution is 100-500 mu g/mL.
3. The preparation method of the ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles according to claim 1, characterized in that: the graphene oxide-high molecular polymer dispersion liquid comprises 1-50% of graphene oxide by mass.
4. The preparation method of the ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles according to claim 3, characterized in that: the mass content of the graphene oxide in the graphene oxide-high molecular polymer dispersion liquid is 2-20%.
5. The preparation method of the ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles according to claim 1, characterized in that: the high molecular polymer aqueous solution is prepared by dispersing thiolated chitosan in water.
6. A ternary composite film reinforced by hydrogen bond network and magnetic nanoparticles is characterized in that: the ternary composite film is prepared by the preparation method of any one of claims 1 to 5, and the tensile stress and the toughness of the prepared ternary composite film are 303MPa and 10.28MJ/m respectively3。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Sonochemical fabrication of folic acid functionalized multistimuli-responsive magnetic graphene oxide-based nanocapsules for targeted drug delivery;Xuejun Cui等;《Chemical Engineering Journal》;20170610;839-848 * |
| 磁性氧化石墨烯/壳聚糖制备及其对磺胺嘧啶吸附性能研究;丁杰等;《环境科学学报》;20161031;第36卷(第10期);3691-3700 * |
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