CN110211757A - With amphipathic and magnetic nano particle and preparation method thereof - Google Patents
With amphipathic and magnetic nano particle and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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Abstract
The present invention relates to Material Fields, more particularly to amphipathic and magnetic nano particle and preparation method thereof.Described to have amphipathic and magnetic nano particle, using magnetic-particle as core, magnetic-particle surface both ends are respectively hydrophobic region and hydrophilic region, and the hydrophobic region is connected with phenyl, and the hydrophilic region is connected with polyethylene group.During preparation is described to have amphipathic and magnetic nano particle, the invention firstly uses amido modified magnetic-particles and benzaldehyde to form dynamic schiff bases key, increase particle in the Desorption Energy of Pickering emulsion interface, inhibit particle rotation, so that it is arranged in emulsion interface with individual particle layer, obtains stable Pickering lotion；Then it by subregion chemical modification, is prepared with amphipathic and magnetic nano particle.
Description
Technical field
The present invention relates to Material Fields, more particularly to amphipathic and magnetic nano particle and preparation method thereof.
Background technique
Amphipathic nature material can effectively reduce oil/water interface energy, to promote stability of emulsion, add in oil exploitation, food
The fields such as work, medicine controlled releasing, sewage/Treatment of Sludge have important application.Janus nano particle is a kind of with amphiphilic solid
Body emulsifier, it is higher by 3 times than homogenous nanoparticle particle in the surface-active of oil-water interfaces, and than small molecule surface-active
Agent, high molecular surfactant have higher interface stability, are a kind of excellent novel amphiphilic materials.
Currently, preparing the main method of Janus nano particle has: the self-assembly method of block copolymer (R.Erhardt,
M.Zhang,A.H.Zettl,C.Abetz,P.Frederik,G.Krausch,V.Abetz,A.H.E.Mü
Ller.J.Am.Chem.Soc.2003,125,3260-3267.), microfluid method (Z.Nie, W.Li, M.Seo, S.Xu,
E.Kmacheva.J Am.Chem.Soc.2006,128,9408-9412.), Pickering lotion auxiliary surface modify method
(L.Hong, S.Jiang, S.Granick.Langmuir.2006,22,9495-9499.) and surface nucleation method
(S.Reculusa,C.Poncet-Legrand,A.Perro,E.Duguet,E.Bourgeat-Lami,C.Mingotaud,
S.Ravaine.Chem.Mater.2005,17,3338-3344.) etc..
Wherein, Pickering lotion auxiliary surface modification method is the three-dimension curved surface constructed by water/paraffin to homogeneous nano
Particle carries out partition protecting, and then carries out subregion modification to particle and obtain Janus nano particle.The core of this technology is,
Form the stabilization Pickering lotion being made of nano particle/water/paraffin.However, can lower nanometer for Interfacial Adsorption
Grain, such as magnetic-particle, Pickering stability of emulsion is low, and particle easily rotates at interface, causes point of nano particle
Area is modified to be difficult to accuracy controlling, and then influences the amphipathic characteristic of Janus nano particle.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of with amphipathic and magnetic nano particle and its preparation side
Method can form stable Pickering lotion during the preparation process, and it is accurate to prepare subregion by Pickering lotion Protection Code
Have amphipathic and magnetic nano particle.
The present invention provides a kind of with amphipathic and magnetic nano particle, using magnetic-particle as core, described magnetic
Grain surface both ends are respectively hydrophobic region and hydrophilic region, and the hydrophobic region is connected with phenyl, and the hydrophilic region is connected with
Polyethylene group.
Preferably, for the magnetic-particle using ferroso-ferric oxide as core, the surface of the ferroso-ferric oxide coats one layer two
Silica.
Preferably, the partial size with amphipathic and magnetic nano particle is 50nm-5 μm.
Preferably, the molecular weight of the polyethylene group is 1000-10000.
The present invention provides a kind of preparation methods with amphipathic and magnetic nano particle, comprising the following steps:
(S1) processing is modified to magnetic-particle surface using the silane coupling agent with amino, obtained with amino base
The magnetic-particle of group；
(S2) magnetic-particle with amino group is mixed in water with benzaldehyde, makes phenyl with schiff bases key company
It is connected to the magnetic-particle surface, paraffin is then added, forms the Pickering lotion of oil-in-water shape；
(S3) pH value of the Pickering lotion is adjusted to 4~5, and washing removal benzaldehyde, it is aldehyde that end group, which is then added,
The polyethylene glycol of base is reacted, and reducing agent is added, and restores the schiff bases key in water phase；
(S4) paraffin is removed, reducing agent is added, goes back the schiff bases key in crude oil phase, obtains that there is amphipathic and magnetic receive
Rice grain；
It is described to have amphipathic and magnetic nano particle using magnetic-particle as core, magnetic-particle surface both ends difference
For hydrophobic region and hydrophilic region, the hydrophobic region is connected with phenyl, and the hydrophilic region is connected with polyethylene group.
Preferably, the magnetic-particle the preparation method comprises the following steps:
(S1-1) ferriferrous oxide particles are synthesized by hydro-thermal method；
(S1-2) with tetraethoxysilane gel-sol is occurred for the ferriferrous oxide particles to react, obtains magnetic
Grain, for the magnetic-particle using ferroso-ferric oxide as core, the ferroso-ferric oxide surface coats layer of silicon dioxide.
Preferably, in the step (S2), the mass ratio of the magnetic-particle and benzaldehyde with amino group is about
1:0.5~1:2.
Preferably, in the step (S3), end group is that the additive amount of the polyethylene glycol of aldehyde radical is the magnetic-particle quality
20%~30%.
Preferably, in the step (S2), after paraffin is added, 60~80 DEG C is heated to, emulsification pretreatment 2~5 minutes, is formed
The Pickering lotion of oil-in-water shape continues constant temperature and is kept for 8~10 hours.
Preferably, in the step (S3), the reaction carries out 8 hours at room temperature.
Compared with prior art, the preparation method with amphipathic and magnetic nano particle of the invention, including it is following
Step:
(S1) processing is modified to magnetic-particle surface using the silane coupling agent with amino, obtained with amino base
The magnetic-particle of group；
(S2) magnetic-particle with amino group is mixed in water with benzaldehyde, makes phenyl with schiff bases key company
It is connected to the magnetic-particle surface, paraffin is then added, forms the Pickering lotion of oil-in-water shape；
(S3) pH value of the Pickering lotion is adjusted to 4~5, and washing removal benzaldehyde, it is aldehyde that end group, which is then added,
The polyethylene glycol of base is reacted, and reducing agent is added, and restores the schiff bases key in water phase；
(S4) paraffin is removed, reducing agent is added, goes back the schiff bases key in crude oil phase, obtains that there is amphipathic and magnetic receive
Rice grain.
During preparation is described to have amphipathic and magnetic nano particle, the invention firstly uses amido modified magnetic
Property particle and benzaldehyde form dynamic schiff bases key, increase particle in the Desorption Energy of Pickering emulsion interface, inhibit particle
Rotation is made it be arranged with individual particle not with emulsion interface, obtains stable Pickering lotion；Then and then by partitioning
It learns and is modified, be prepared with amphipathic and magnetic nano particle.It is prepared by the present invention that there is amphipathic and magnetic nanometer
Particle emulsifying capacity with higher, and can be manipulated and be collected by magnetic field, it is expected to be widely applied to oil exploitation, food adds
The fields such as work, medicine controlled releasing, sewage treatment or Treatment of Sludge.
Detailed description of the invention
Fig. 1 shows the scanning electron microscope (SEM) photographs prepared by the present invention with amphipathic and magnetic nano particle；
Fig. 2 indicates to form the flow diagram of the magnetic-particle of surface modification amino；
Fig. 3 indicate the application preparation with amphipathic and magnetic nano particle as emulsifier formation stable emulsion
Scanning electron microscope (SEM) photograph；
Diagram is explained:
1 is ferroso-ferric oxide, and 2 be silicon dioxide layer, and 3 be amino.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described below with reference to embodiment, still
It should be appreciated that these descriptions are only further explanation the features and advantages of the present invention, rather than limiting the invention.
Embodiment of the invention discloses a kind of with amphipathic and magnetic nano particle, using magnetic-particle as core, institute
Stating magnetic-particle surface both ends is respectively hydrophobic region and hydrophilic region, and the hydrophobic region is connected with phenyl, the hydrophilic area
Domain is connected with polyethylene group.
In the present invention, using magnetic-particle as core, hydrophilic region and hydrophobic region can accuracy controlling, there is good amphiphilic
Property.Its structure can be found in the scanning electron microscope (SEM) photograph of Fig. 1.As seen from Figure 1, the application preparation is formd with amphipathic and magnetic
Nano particle.
Conventionally, as magnetic-particle can be relatively low for Interfacial Adsorption, therefore, Pickering cream is formed
Stability when liquid is lower, it is difficult to which accuracy controlling subregion is modified.But the present invention obtains amphiphilic by improving preparation method
Property good have both magnetic nano particle.
In the present invention, it is preferred to the magnetic-particle is using ferroso-ferric oxide as core, the surface of the ferroso-ferric oxide
Coat layer of silicon dioxide.
The partial size with amphipathic and magnetic nano particle is preferably 50nm-5 μm, more preferably 50nm-
500nm.It is preferred that the nano particle of the partial size is better than larger size nano particle to the stablizing effect of lotion.
In the present invention, the hydrophobic region is connected with phenyl, and hydrophobic property is stronger.The hydrophilic region is connected with poly-
Glycol group, the molecular weight of the polyethylene group are preferably 1000-10000, more preferably 1000-5000.In view of aldehyde
The cost of the polyethylene glycol of base sealing end, the preferably molecular weight polyethylene glycol, hydrophilic effect is good and cost is lower.
Embodiment of the invention discloses a kind of preparation method with amphipathic and magnetic nano particle, including it is following
Step:
(S1) processing is modified to magnetic-particle surface using the silane coupling agent with amino, obtained with amino base
The magnetic-particle of group；
(S2) magnetic-particle with amino group is mixed in water with benzaldehyde, makes phenyl with schiff bases key company
It is connected to the magnetic-particle surface, paraffin is then added, forms the Pickering lotion of oil-in-water shape；
(S3) pH value of the Pickering lotion is adjusted to 4~5, and washing removal benzaldehyde, it is aldehyde that end group, which is then added,
The polyethylene glycol of base is reacted, and reducing agent is added, and restores the schiff bases key in water phase；
(S4) paraffin is removed, reducing agent is added, goes back the schiff bases key in crude oil phase, obtains that there is amphipathic and magnetic receive
Rice grain；
It is described to have amphipathic and magnetic nano particle using magnetic-particle as core, magnetic-particle surface both ends difference
For hydrophobic region and hydrophilic region, the hydrophobic region is connected with phenyl, and the hydrophilic region is connected with polyethylene group.
Below according to specific steps, the preparation method of the nano particle is described in detail:
(S1) processing is modified to magnetic-particle surface using the silane coupling agent with amino, obtained with amino base
The magnetic-particle of group.
Preferably, the magnetic-particle the preparation method comprises the following steps:
(S1-1) ferriferrous oxide particles are synthesized by hydro-thermal method；
(S1-2) with tetraethoxysilane gel-sol is occurred for the ferriferrous oxide particles to react, obtains magnetic
Grain, for the magnetic-particle using ferroso-ferric oxide as core, the ferroso-ferric oxide surface coats layer of silicon dioxide.The formation
Magnetic-particle flow chart referring specifically to Fig. 2.
By modification, magnetic-particle surface connects upper amino, to be conducive to react life with aldehyde radical in subsequent step
At schiff bases key.
(S2) magnetic-particle with amino group is mixed in water with benzaldehyde, makes phenyl with schiff bases key company
It is connected to the magnetic-particle surface, paraffin is then added, forms the Pickering lotion of oil-in-water shape.In this step, magnetic
The amino that particle has is reacted with the aldehyde radical in benzaldehyde, generates schiff bases key, phenyl is made to be connected to the magnetic-particle surface.
After paraffin is added, Pickering lotion is formed.Due to generating schiff bases key, magnetic-particle is increased in Pickering lotion
Desorption Energy, it is suppressed that magnetic-particle rotation, so that it is arranged in emulsion interface with individual particle layer, obtain stable Pickering
Lotion.
In this step, the mass ratio of the magnetic-particle and benzaldehyde with amino group is about 1:0.5~1:2.
Preferably, after paraffin being added, 60~80 DEG C is heated to, emulsification pretreatment 2~5 minutes, forms oil-in-water shape
Pickering lotion continues constant temperature and is kept for 8~10 hours.
(S3) pH value of the Pickering lotion is adjusted to 4~5, and washing removal benzaldehyde, it is aldehyde that end group, which is then added,
The polyethylene glycol of base is reacted, and reducing agent is added, and restores the schiff bases key in water phase.
Before adjusting pH value, it is preferable that cool down to Pickering lotion, be cooled to paraffin melting point hereinafter, magnetic
Particle is embedded in paraffin surface.
PH value by the way that dilute hydrochloric acid adjusting Pickering lotion is added makes in water phase between benzaldehyde and amino to 4~5
Schiff bases key disconnect, by washing, remove water phase in benzaldehyde.
The polyethylene glycol that end group is aldehyde radical is added to be reacted, the ammonia on aldehyde radical and magnetic-particle in the polyethylene glycol
Base re-forms schiff bases key.Reducing agent is added, restores the schiff bases key in water phase.Form the hydrophilic of connection polyethylene group
Region.
The reducing agent is preferably sodium borohydride.
Preferably, end group is 20%~30% that the additive amount of the polyethylene glycol of aldehyde radical is the magnetic-particle quality.
Preferably, the reaction carries out 8~10 hours at room temperature.
(S4) paraffin is removed, reducing agent is added, goes back the schiff bases key in crude oil phase, obtains that there is amphipathic and magnetic receive
Rice grain.
The reducing agent is preferably sodium borohydride.
It is described using magnetic-particle as core, magnetic-particle surface both ends are respectively hydrophobic region and hydrophilic region, described
Hydrophobic region is connected with phenyl, and the hydrophilic region is connected with polyethylene group.
The method for removing paraffin dissolves removal paraffin preferably by tetrahydrofuran.After removing paraffin, benzaldehyde in crude oil phase
The schiff bases key formed with the amino on magnetic-particle surface is exposed, and is restored by reducing agent, the region for connecting phenyl is formed
Hydrophobic region.
For a further understanding of the present invention, there is amphipathic and magnetic receive to provided by the invention below with reference to embodiment
Rice grain and preparation method thereof is described in detail, and protection scope of the present invention is not limited by the following examples.
Embodiment 1: preparation surface has the magnetic-particle of amino
Firstly, synthesizing Fe by hydro-thermal method3O4Nano particle.26.9g green vitriol, 18.4g six are hydrated trichlorine
Change dissolved ferric iron in 50mL water, nitrogen catches up with oxygen 30 minutes.Temperature is risen to 70 DEG C, be rapidly added 50mL ammonium hydroxide, 3g oleic acid and
2g undecenoic acid stirs 1h at revolving speed 500rpm.85 DEG C are continuously heating to, heats 30 minutes, extra ammonia is discharged.
Secondly, by Fe made from hydro-thermal method3O4It is reacted by the gel-sol of tetraethoxysilane (TEOS), on its surface
Coated Si O2.Further, by 3g SiO2Modified Fe3O4It is scattered in 100mL 1vol% (3- aminopropyl) triethoxysilane
(APTES) ethanol solution reacts 8h at 70 DEG C.It is separated using magnetic field, is repeatedly washed with ethyl alcohol.Silica will be finally coated with
Fe3O4Particle is dispersed in water, and the surface for obtaining 2wt% is spare with the magnetic-particle aqueous dispersions of amino.
Embodiment 2: preparation has amphipathic and magnetic nano particle
Surface prepared by 0.1mL embodiment 1 is added in 1.9mL water with the magnetic-particle aqueous dispersions of amino, ultrasound
Dispersion.0.1g paraffin is heated to 70 DEG C, is existed with high-speed shearing machine after the cyclohexane solution (1mg/mL) of 2mL benzaldehyde is added
Emulsification pretreatment 2min, obtains oil-in-water emulsion under the speed of 20000r/min.Continue isothermal reaction 8h.It is cooled to room temperature, is added
PH to 4-5 is disconnected schiff bases key between benzaldehyde and amino by dilute hydrochloric acid.Removal benzaldehyde is repeatedly washed with water.It is added 0.5mL points
The end group that son amount is 3000 is that a small amount of sodium borohydride is added after reacting at room temperature 8h in the Aqueous Solutions of Polyethylene Glycol (1mg/mL) of aldehyde radical
Reduced Schiff base key.Deparaffnize is removed with tetrahydrofuran dissolution, a small amount of NaBH is added4Schiff bases key also in crude oil phase.Obtain two
Side is respectively the magnetic Janus particle of hydrophobic phenyl and hydrophilic polyethylene group.The partial size of the magnetism Janus particle is about
50nm。
Magnetism Janus particle manufactured in the present embodiment is separately added into water phase and oily phase, stands 10 hours after ultrasonic disperse,
Observe dispersity.
As a result, dispersion performance of the magnetism Janus particle manufactured in the present embodiment in water phase and in oily phase is preferable, dispersion
Uniformly.
Embodiment 3
Surface prepared by 0.1mL embodiment 1 is added in 1.9mL water with the magnetic-particle aqueous dispersions of amino, ultrasound
Dispersion.0.1g paraffin is heated to 70 DEG C, is existed with high-speed shearing machine after the cyclohexane solution (1mg/mL) of 4mL benzaldehyde is added
Emulsification pretreatment 2min, obtains oil-in-water emulsion under the speed of 20000r/min.Continue isothermal reaction 8h.It is cooled to room temperature, is added
PH to 4-5 is disconnected schiff bases key between benzaldehyde and amino by dilute hydrochloric acid.Removal benzaldehyde is repeatedly washed with water.It is added 0.5mL points
The end group that son amount is 3000 is that a small amount of sodium borohydride is added after reacting at room temperature 8h in the Aqueous Solutions of Polyethylene Glycol (1mg/mL) of aldehyde radical
Reduced Schiff base key.Deparaffnize is removed with tetrahydrofuran dissolution, a small amount of NaBH is added4Schiff bases key also in crude oil phase.Obtain two
Side is respectively the magnetic Janus particle of hydrophobic phenyl and hydrophilic polyethylene group.The partial size of the magnetism Janus particle is about
50nm。
The present embodiment increases benzaldehyde dosage, and magnetic nanoparticle insertion paraffin fractions are more, i.e., more by protected area
Greatly, while with polyethylene glycol the area for reacting generation hydrophilic modifying becomes smaller.Magnetism Janus particle is more likely formed stable oil packet
Water emulsion.
Magnetism Janus particle manufactured in the present embodiment is separately added into water phase and oily phase, stands 10 hours after ultrasonic disperse,
Observe dispersity.
As a result, dispersion performance of the magnetism Janus particle manufactured in the present embodiment in water phase and in oily phase is preferable, dispersion
Uniformly.
Embodiment 4
Surface prepared by 0.1mL embodiment 1 is added in 1.9mL water with the magnetic-particle aqueous dispersions of amino, ultrasound
Dispersion.0.1g paraffin is heated to 70 DEG C, is existed with high-speed shearing machine after the cyclohexane solution (1mg/mL) of 2mL benzaldehyde is added
Emulsification pretreatment 2min, obtains oil-in-water emulsion under the speed of 20000r/min.Continue isothermal reaction 8h.It is cooled to room temperature, is added
PH to 4-5 is disconnected schiff bases key between benzaldehyde and amino by dilute hydrochloric acid.Removal benzaldehyde is repeatedly washed with water.It is added 0.5mL points
The end group that son amount is 5000 is that a small amount of sodium borohydride is added after reacting at room temperature 8h in the Aqueous Solutions of Polyethylene Glycol (1mg/mL) of aldehyde radical
Reduced Schiff base key.Deparaffnize is removed with tetrahydrofuran dissolution, a small amount of NaBH is added4Schiff bases key also in crude oil phase.Obtain two
Side is respectively the magnetic Janus particle of hydrophobic phenyl and hydrophilic polyethylene group.The partial size of the magnetism Janus particle is about
50nm。
The present embodiment, increase molecular weight polyethylene glycol, i.e., use molecular weight for 5000 polyethylene glycol, gained magnetism
The enhancing of Janus particle hydrophily, is more likely formed stable emulsion oil-in-water.
Magnetism Janus particle manufactured in the present embodiment is separately added into water phase and oily phase, stands 10 hours after ultrasonic disperse,
Observe dispersity.
As a result, dispersion performance of the magnetism Janus particle manufactured in the present embodiment in water phase and in oily phase is preferable, dispersion
Uniformly.
Embodiment 5: the application with amphipathic and magnetic nano particle
Use magnetic Janus particle as emulsifier prepare lotion when, emulsion droplet size can pass through Janus nano particle
Dosage regulation.When Janus nano particle dosage is reduced to 0.6wt ‰ by 3wt ‰, emulsion droplet size is increased by 5~10 μm
To 30~50 μm.
Referring specifically to Fig. 3, magnetic Janus particle can be used as emulsifier, to form stable lotion.
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of with amphipathic and magnetic nano particle, which is characterized in that using magnetic-particle as core, the magnetic-particle table
Face both ends are respectively hydrophobic region and hydrophilic region, and the hydrophobic region is connected with phenyl, and the hydrophilic region is connected with poly- second
Glycol group.
2. nano particle according to claim 1, which is characterized in that the magnetic-particle using ferroso-ferric oxide as core,
The surface of the ferroso-ferric oxide coats layer of silicon dioxide.
3. nano particle according to claim 1, which is characterized in that described with amphipathic and magnetic nano particle
Partial size is 50nm-5 μm.
4. nano particle according to claim 1, which is characterized in that the molecular weight of the polyethylene group is 1000-
10000。
5. a kind of preparation method with amphipathic and magnetic nano particle, comprising the following steps:
(S1) processing is modified to magnetic-particle surface using the silane coupling agent with amino, obtained with amino group
Magnetic-particle；
(S2) magnetic-particle with amino group is mixed in water with benzaldehyde, make phenyl with schiff bases key connection in
Then paraffin is added in the magnetic-particle surface, form the Pickering lotion of oil-in-water shape；
(S3) pH value of the Pickering lotion is adjusted to 4~5, and washing removal benzaldehyde, it is aldehyde radical that end group, which is then added,
Polyethylene glycol is reacted, and reducing agent is added, and restores the schiff bases key in water phase；
(S4) paraffin is removed, reducing agent is added, goes back the schiff bases key in crude oil phase, obtains the nanometer for having amphipathic and magnetic
Grain；
Described to have amphipathic and magnetic nano particle using magnetic-particle as core, magnetic-particle surface both ends are respectively to dredge
Water area and hydrophilic region, the hydrophobic region are connected with phenyl, and the hydrophilic region is connected with polyethylene group.
6. preparation method according to claim 5, which is characterized in that the magnetic-particle the preparation method comprises the following steps:
(S1-1) ferriferrous oxide particles are synthesized by hydro-thermal method；
(S1-2) with tetraethoxysilane gel-sol is occurred for the ferriferrous oxide particles to react, obtains magnetic-particle, institute
Magnetic-particle is stated using ferroso-ferric oxide as core, the ferroso-ferric oxide surface coats layer of silicon dioxide.
7. preparation method according to claim 5, which is characterized in that described to have amino group in the step (S2)
Magnetic-particle and the mass ratio of benzaldehyde be about 1:0.5~1:2.
8. preparation method according to claim 5, which is characterized in that in the step (S3), end group is the poly- second of aldehyde radical
The additive amount of glycol is the 20%~30% of the magnetic-particle quality.
9. preparation method according to claim 5, which is characterized in that in the step (S2), after paraffin is added, be heated to
60~80 DEG C, emulsification pretreatment 2~5 minutes, the Pickering lotion of oil-in-water shape is formed, continues constant temperature and is kept for 8~10 hours.
10. preparation method according to claim 5, which is characterized in that in the step (S3), the reaction is at room temperature
It carries out 8 hours.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111303853A (en) * | 2020-02-25 | 2020-06-19 | 中国石油大学(北京) | Amphiphilic Janus nano-particle and preparation method and application thereof |
| CN111774017A (en) * | 2020-07-10 | 2020-10-16 | 清华大学 | Phase change microcapsule based on polymer shell and manufacturing method thereof |
| CN111804238A (en) * | 2020-06-28 | 2020-10-23 | 中国人民解放军军事科学院国防科技创新研究院 | High-molecular surfactant and method for regulating and controlling oil-water interfacial tension by using same |
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| CN111804238A (en) * | 2020-06-28 | 2020-10-23 | 中国人民解放军军事科学院国防科技创新研究院 | High-molecular surfactant and method for regulating and controlling oil-water interfacial tension by using same |
| CN111804238B (en) * | 2020-06-28 | 2021-08-10 | 中国人民解放军军事科学院国防科技创新研究院 | High-molecular surfactant and method for regulating and controlling oil-water interfacial tension by using same |
| CN111774017A (en) * | 2020-07-10 | 2020-10-16 | 清华大学 | Phase change microcapsule based on polymer shell and manufacturing method thereof |
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| CN113713775A (en) * | 2021-09-03 | 2021-11-30 | 陕西科技大学 | Schiff base modified nano magnetic composite adsorption material and preparation method thereof |
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