CN112164574A - Preparation method of sodium dodecyl sulfate modified magnetic nanoparticles - Google Patents
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- CN112164574A CN112164574A CN202010988696.9A CN202010988696A CN112164574A CN 112164574 A CN112164574 A CN 112164574A CN 202010988696 A CN202010988696 A CN 202010988696A CN 112164574 A CN112164574 A CN 112164574A
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
Abstract
The invention discloses a preparation method of magnetic nanoparticles modified by sodium dodecyl sulfate, which comprises the following steps: FeCl3.6H2O、FeCl2.4H2Dissolving O and HCl in deionized water to prepare stock solution of ferrous iron and ferric chloride, and degassing with nitrogen; degassing NaOH solution, and heating; dropwise adding the stock solution into the NaOH solution, and stirring; forming magnetite nanoparticles; separating magnetite nanoparticles, and washing with deionized water; the magnetite nanoparticles were resuspended in deionized water; stabilizing for one week, taking out, washing with deionized water, and drying; dispersing the magnetite nanoparticles in trisodium citrate, washing with acetone and deionized water after water bath, and drying to obtain treated magnetite nanoparticles; weighing sodium dodecyl sulfate, dissolving in deionized water, dispersing magnetite nanoparticles in the deionized water, stirring, separating, washing and drying. The invention adopts a chemical precipitation method to prepare magnetite nano-particles, utilizes trisodium citrate to improve the dispersibility of the magnetite nano-particles, and utilizes SDS to modify the surface of the magnetite nano-particles so as to change the potential of the magnetite nano-particlesAnd (6) changing.
Description
Technical Field
The invention belongs to the field of environmental materials, and particularly relates to a preparation method of sodium dodecyl sulfate modified magnetic nanoparticles.
Background
In recent years, nanoparticles have played an important role in the progress of people in the fields of industry, agriculture, medicine and environment. The magnetite nanoparticles have superparamagnetism and can be rapidly separated from liquid under the action of an external electric field. But the magnetite particles can be agglomerated due to huge specific surface energy, and the trisodium citrate can be grafted on the magnetite surface, so that the particles have good dispersibility; in addition, the surfactant is a method for solving particle agglomeration, and can specifically adsorb pollutants in water by changing the potential or chemical bond on the surface of the nanoparticle, and SDS is a cheap and effective anionic surfactant, is environmentally friendly, and becomes the first choice. Therefore, the method can be used for adsorbing and removing pollutants in the environmental field by utilizing the characteristics, so that the method for preparing the SDS-modified magnetite nanoparticles has very important practical significance.
At present, the preparation of modifying a surfactant outside a magnetic material has been partially reported. For example, patent No. cn201310692705.x reports a magnetic nanoparticle modified by a fluorosilane surfactant, but the fluorosilane surfactant is easy to pollute the environment and has poor coating effect; the magnetic nanoparticles reported in the paper magnetic nanoparticles with surface modification for removal of methyl vinyl from aqueous solutions have the disadvantage of poor adsorption effect due to poor dispersibility.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a preparation method of a magnetic nanoparticle modified by sodium dodecyl sulfate, which has better dispersibility and lower potential and can effectively adsorb positive pollutants in water.
The purpose of the invention is realized by the following technical scheme.
The preparation method of the magnetic nano-particles modified by the sodium dodecyl sulfate comprises the following steps:
the method comprises the following steps: FeCl is added3.6H2O、FeCl2.4H2O and HCl were dissolved in 50mL of deionized water to prepare stock solutions of ferrous and ferric chloride in a beaker, which was then filteredIt is degassed with nitrogen for 20 min; simultaneously, the NaOH solution was degassed with nitrogen for 15min and heated to 80 ℃ in the reactor; then, under the protection of nitrogen, dropwise adding stock solutions of ferrous iron and ferric chloride into a reactor of the NaOH solution by using a dropping funnel within 30min, and violently stirring by using a glassware stirrer; during the whole process, the solution temperature is kept at 80 ℃, nitrogen is blown to prevent oxygen from invading, and magnetite nanoparticles are formed through the reaction; after the reaction, separating the obtained magnetite nanoparticles from the reaction medium by a magnet, and then washing the magnetite nanoparticles with deionized water for several times; finally, the obtained magnetite nanoparticles were resuspended in 500mL of deionized water degassed with nitrogen; the pH value of the washed suspension is 11.0, the magnetite nanoparticles in the suspension are stable for one week under the condition, and finally the magnetite nanoparticles are taken out and fully washed by deionized water, and are dried for 24 hours in a vacuum drying oven at the temperature of 45 ℃ for later use;
step two: dispersing magnetite nanoparticles in trisodium citrate, treating in 80 ℃ water bath for 1h, then alternately washing with acetone and deionized water, and vacuum drying at 30 ℃ for 24h to obtain treated magnetite nanoparticles;
step three: and weighing a certain amount of sodium dodecyl sulfate, ultrasonically dissolving the sodium dodecyl sulfate in 200mL of deionized water, dispersing a certain amount of magnetite nanoparticles obtained in the second step in the deionized water after the magnetite nanoparticles are completely dissolved, stirring for 3 hours, separating the magnetite nanoparticles modified by the sodium dodecyl sulfate by using a magnet after the reaction is finished, fully washing the magnetite nanoparticles with the deionized water, and drying the magnetite nanoparticles modified by the sodium dodecyl sulfate in a vacuum drying oven at 60 ℃ for 12 hours.
The FeCl in the step one3.6H2Mass of O10.4 g, FeCl2.4H2The mass of O was 10.4g, the HCl concentration was 12mol/L, the volume was 1.7mL, and the concentration of the NaOH solution was 1.5mol/L, the volume was 500 mL.
In the second step, the concentration of the trisodium citrate is 0.05-0.2mol/L, the volume is 200ml, the ratio of the acetone to the deionized water is 1:3, and the volume fraction of the acetone is 99.5%.
In the third step, the mass of the magnetite nano particles is 0.8g, the mass of Sodium Dodecyl Sulfate (SDS) is 0.2-1.6g, and the temperature is 20-70 ℃.
The reactions in the second step and the third step are carried out under the conditions of no acid, no alkali, no salt and no additive.
The stirring in the first step and the stirring in the third step are both carried out in a homogeneous reactor, the stirring speed in the first step is 1000r/min, and the stirring speed in the third step is 400 r/min.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) the experimental conditions of the invention are easy to control, and the reaction device is simple and easy to realize.
(2) The invention has the advantages of uniform particle size distribution, good dispersibility, stable nano particles and difficult denaturation under normal conditions.
(3) The raw materials of the invention are simple and easy to obtain, and no toxic substances are generated to the environment.
The invention relates to a preparation method of magnetic nanoparticles modified by sodium dodecyl sulfate, which is characterized in that trisodium citrate is used for treating a sample to reduce the agglomeration of the sample, and Sodium Dodecyl Sulfate (SDS) is used for modifying the sample to reduce the external Zeta potential of the sample.
Drawings
FIG. 1 is a TEM image of magnetite nanoparticles prepared in step one of example 1 of the present invention;
FIG. 2 is a TEM image of magnetite nanoparticles after treatment with trisodium citrate according to example 1 step of the present invention;
FIG. 3 is a TEM image of three SDS-modified magnetite nanoparticles according to example 1;
FIG. 4 is a VSM picture of magnetite nanoparticles prepared in step one of example 1 of the present invention;
fig. 5 is a VSM picture of SDS-modified magnetite nanoparticles prepared in step three of example 1 of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples. This example is provided for a better understanding and is not intended to limit the invention in any way.
The invention relates to a preparation method of magnetic nanoparticles modified by sodium dodecyl sulfate, which adopts a chemical precipitation method to prepare magnetite nanoparticles, improves the dispersibility of the magnetite nanoparticles in a trisodium citrate solution, changes the surface potential of the magnetite nanoparticles in a Sodium Dodecyl Sulfate (SDS) solution, and obtains the nanoparticles with low price, good dispersibility, uniform particle size, stable structure and no influence on the magnetic performance through a large amount of experimental researches, and specifically comprises the following steps:
the method comprises the following steps: FeCl is added3.6H2O、FeCl2.4H2O and HCl were dissolved in 50mL of deionized water to prepare stock solutions of ferrous and ferric chloride in a beaker, which was then degassed with nitrogen for 20 min; simultaneously, the NaOH solution was degassed with nitrogen for 15min and heated to 80 ℃ in the reactor; then, under the protection of nitrogen, dropwise adding stock solutions of ferrous iron and ferric chloride into a reactor of the NaOH solution by using a dropping funnel within 30min, and violently stirring by using a glassware stirrer; throughout the above process, the solution temperature was maintained at 80 ℃, and nitrogen was purged to prevent oxygen ingress, by which reaction magnetite nanoparticles were formed. After the reaction, separating the obtained magnetite nanoparticles from the reaction medium by a magnet, and then washing the magnetite nanoparticles with deionized water for several times; finally, the obtained magnetite nanoparticles were resuspended in 500mL of deionized water degassed with nitrogen; and (3) after washing, the pH value of the suspension is 11.0, the magnetite nanoparticles in the suspension are stable for one week under the condition, finally the magnetite nanoparticles are taken out and fully washed by deionized water until the pH value is neutral, and the magnetite nanoparticles are dried for 24 hours in a vacuum drying oven at the temperature of 45 ℃ for later use. The stirring in this step can be carried out in a homogeneous reactor, and the stirring speed can be 1000 r/min. The magnetite nanoparticles prepared in this step were subjected to TEM and VSM characterization as shown in fig. 1, 4.
Step two: dispersing magnetite nanoparticles in trisodium citrate, treating in water bath at 80 ℃ for 1h, then alternately washing with acetone and deionized water, and drying in vacuum at 30 ℃ for 24h to obtain the treated magnetite nanoparticles. The reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive. The magnetite nanoparticles modified in this step were subjected to TEM characterization as shown in fig. 2.
Step three: weighing a certain amount of Sodium Dodecyl Sulfate (SDS), ultrasonically dissolving the Sodium Dodecyl Sulfate (SDS) in 200mL of deionized water, after the Sodium Dodecyl Sulfate (SDS) is completely dissolved, dispersing a certain amount of magnetite nanoparticles obtained in the second step into the SDS nanoparticles, stirring the mixture for 3 hours at the temperature of 20-70 ℃ to better coat the SDS on the surface of the magnetite nanoparticles, separating the magnetite nanoparticles modified by the sodium dodecyl sulfate by using a magnet after the reaction is finished, fully washing the magnetite nanoparticles by using the deionized water until the PH is neutral, and drying the magnetite nanoparticles modified by the sodium dodecyl sulfate in a vacuum drying oven at the temperature of 60 ℃ for 12 hours. The reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive. The stirring in this step can be carried out in a homogeneous reactor, and the stirring speed can be 400 r/min. The SDS-modified magnetite nanoparticles from this step were subjected to TEM and VSM characterization as shown in fig. 3, 5.
Further, the FeCl in the step one3.6H2Mass of O10.4 g, FeCl2.4H2The mass of O was 10.4g, the HCl concentration was 12mol/L, the volume was 1.7mL, and the concentration of the NaOH solution was 1.5mol/L, the volume was 500 mL.
Further, in the second step, the concentration of the trisodium citrate is 0.05-0.2mol/L, the volume is 200ml, the ratio of the acetone to the deionized water is 1:3, and the volume fraction of the acetone is 99.5%.
Further, the magnetite nano-particles in the third step have a mass of 0.8g, and the Sodium Dodecyl Sulfate (SDS) has a mass of 0.2-1.6 g.
Example 1:
the preparation method of the magnetic nano-particles modified by the sodium dodecyl sulfate comprises the following steps:
the method comprises the following steps: FeCl is added3.6H2O、FeCl2.4H2O and HCl were dissolved in 50mL of deionized water to prepare stock solutions of ferrous and ferric chloride in a beaker, which was then degassed with nitrogen for 20 min; simultaneously, the NaOH solution was degassed with nitrogen for 15min and heated to 80 ℃ in the reactor; then, under the protection of nitrogen, the mixture is poured into a dropping funnel within 30minDropwise adding stock solutions of ferrous iron and ferric chloride into a reactor of NaOH solution, and violently stirring by a glassware stirrer; throughout the above process, the solution temperature was maintained at 80 ℃, and nitrogen was purged to prevent oxygen ingress, by which reaction magnetite nanoparticles were formed. After the reaction, separating the obtained magnetite nanoparticles from the reaction medium by a magnet, and then washing the magnetite nanoparticles with deionized water for several times; finally, the obtained magnetite nanoparticles were resuspended in 500mL of deionized water degassed with nitrogen; and (3) after washing, the pH value of the suspension is 11.0, the magnetite nanoparticles in the suspension are stable for one week under the condition, finally the magnetite nanoparticles are taken out and fully washed by deionized water until the pH value is neutral, and the magnetite nanoparticles are dried for 24 hours in a vacuum drying oven at the temperature of 45 ℃ for later use.
Wherein the FeCl3.6H2Mass of O10.4 g, FeCl2.4H2The mass of O was 10.4g, the HCl concentration was 12mol/L, the volume was 1.7mL, and the concentration of the NaOH solution was 1.5mol/L, the volume was 500 mL. The stirring in this step can be carried out in a homogeneous reactor, and the stirring speed can be 1000 r/min.
Step two: dispersing magnetite nanoparticles in trisodium citrate, treating in water bath at 80 ℃ for 1h, then alternately washing with acetone and deionized water, and drying in vacuum at 30 ℃ for 24h to obtain the treated magnetite nanoparticles.
Wherein the concentration of the trisodium citrate is 0.05mol/L, the volume of the trisodium citrate is 200ml, the ratio of the acetone to the deionized water is 1:3, and the volume fraction of the acetone is 99.5%. The reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive.
Step three: and weighing 0.2g of Sodium Dodecyl Sulfate (SDS), ultrasonically dissolving in 200mL of deionized water, after completely dissolving, dispersing 0.8g of the magnetite nanoparticles obtained in the second step in the deionized water, stirring for 3 hours at the rotating speed of 400r/min at the temperature of 20 ℃, separating the magnetite nanoparticles modified by the sodium dodecyl sulfate by using a magnet after the reaction is finished, fully washing the magnetite nanoparticles by using the deionized water until the pH is neutral, and drying the magnetite nanoparticles modified by the sodium dodecyl sulfate in a vacuum drying oven for 12 hours at the temperature of 60 ℃.
Wherein, the reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive. The stirring in this step is carried out in a homogeneous reactor.
Example 2:
the preparation method of the magnetic nano-particles modified by the sodium dodecyl sulfate comprises the following steps:
the method comprises the following steps: FeCl is added3.6H2O、FeCl2.4H2O and HCl were dissolved in 50mL of deionized water to prepare stock solutions of ferrous and ferric chloride in a beaker, which was then degassed with nitrogen for 20 min; simultaneously, the NaOH solution was degassed with nitrogen for 15min and heated to 80 ℃ in the reactor; then, under the protection of nitrogen, dropwise adding stock solutions of ferrous iron and ferric chloride into a reactor of the NaOH solution by using a dropping funnel within 30min, and violently stirring by using a glassware stirrer; throughout the above process, the solution temperature was maintained at 80 ℃, and nitrogen was purged to prevent oxygen ingress, by which reaction magnetite nanoparticles were formed. After the reaction, separating the obtained magnetite nanoparticles from the reaction medium by a magnet, and then washing the magnetite nanoparticles with deionized water for several times; finally, the obtained magnetite nanoparticles were resuspended in 500mL of deionized water degassed with nitrogen; and (3) after washing, the pH value of the suspension is 11.0, the magnetite nanoparticles in the suspension are stable for one week under the condition, finally the magnetite nanoparticles are taken out and fully washed by deionized water until the pH value is neutral, and the magnetite nanoparticles are dried for 24 hours in a vacuum drying oven at the temperature of 45 ℃ for later use.
Wherein the FeCl3.6H2Mass of O10.4 g, FeCl2.4H2The mass of O was 10.4g, the HCl concentration was 12mol/L, the volume was 1.7mL, and the concentration of the NaOH solution was 1.5mol/L, the volume was 500 mL. The stirring in this step can be carried out in a homogeneous reactor, and the stirring speed can be 1000 r/min.
Step two: dispersing magnetite nanoparticles in trisodium citrate, treating in water bath at 80 ℃ for 1h, then alternately washing with acetone and deionized water, and drying in vacuum at 30 ℃ for 24h to obtain the treated magnetite nanoparticles.
Wherein the concentration of the trisodium citrate is 0.1mol/L, the volume of the trisodium citrate is 200ml, the ratio of the acetone to the deionized water is 1:3, and the volume fraction of the acetone is 99.5%. The reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive.
Step three: and weighing 0.8g of Sodium Dodecyl Sulfate (SDS), ultrasonically dissolving in 200mL of deionized water, after completely dissolving, dispersing 0.8g of the magnetite nanoparticles obtained in the second step in the deionized water, stirring for 3 hours at the rotating speed of 400r/min at the temperature of 50 ℃, separating the magnetite nanoparticles modified by the sodium dodecyl sulfate by using a magnet after the reaction is finished, fully washing the magnetite nanoparticles by using the deionized water until the pH is neutral, and drying the magnetite nanoparticles modified by the sodium dodecyl sulfate in a vacuum drying oven at the temperature of 60 ℃ for 12 hours.
Wherein, the reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive. The stirring in this step is carried out in a homogeneous reactor.
Example 3:
the preparation method of the magnetic nano-particles modified by the sodium dodecyl sulfate comprises the following steps:
the method comprises the following steps: FeCl is added3.6H2O、FeCl2.4H2O and HCl were dissolved in 50mL of deionized water to prepare stock solutions of ferrous and ferric chloride in a beaker, which was then degassed with nitrogen for 20 min; simultaneously, the NaOH solution was degassed with nitrogen for 15min and heated to 80 ℃ in the reactor; then, under the protection of nitrogen, dropwise adding stock solutions of ferrous iron and ferric chloride into a reactor of the NaOH solution by using a dropping funnel within 30min, and violently stirring by using a glassware stirrer; throughout the above process, the solution temperature was maintained at 80 ℃, and nitrogen was purged to prevent oxygen ingress, by which reaction magnetite nanoparticles were formed. After the reaction, separating the obtained magnetite nanoparticles from the reaction medium by a magnet, and then washing the magnetite nanoparticles with deionized water for several times; finally, the obtained magnetite nanoparticles were resuspended in 500mL of deionized water degassed with nitrogen; the pH of the suspension after washing was 11.0, under which conditions the magnetite nanoparticles in the suspension were presentStabilizing for one week, taking out, fully washing with deionized water until the pH is neutral, and drying in a vacuum drying oven at 45 ℃ for 24h for later use.
Wherein the FeCl3.6H2Mass of O10.4 g, FeCl2.4H2The mass of O was 10.4g, the HCl concentration was 12mol/L, the volume was 1.7mL, and the concentration of the NaOH solution was 1.5mol/L, the volume was 500 mL. The stirring in this step can be carried out in a homogeneous reactor, and the stirring speed can be 1000 r/min.
Step two: dispersing magnetite nanoparticles in trisodium citrate, treating in water bath at 80 ℃ for 1h, then alternately washing with acetone and deionized water, and drying in vacuum at 30 ℃ for 24h to obtain the treated magnetite nanoparticles.
Wherein the concentration of the trisodium citrate is 0.2mol/L, the volume of the trisodium citrate is 200ml, the ratio of the acetone to the deionized water is 1:3, and the volume fraction of the acetone is 99.5%. The reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive.
Step three: weighing 1.6g of Sodium Dodecyl Sulfate (SDS), ultrasonically dissolving in 200mL of deionized water, after completely dissolving, dispersing 0.8g of the magnetite nanoparticles obtained in the second step in the deionized water, stirring at the rotating speed of 400r/min at 70 ℃ for 3h, after the reaction is finished, separating the magnetite nanoparticles modified by the sodium dodecyl sulfate by using a magnet, fully washing by using the deionized water until the PH is neutral, and drying the magnetite nanoparticles modified by the sodium dodecyl sulfate in a vacuum drying oven at 60 ℃ for 12 h.
Wherein, the reaction in the step is carried out under the conditions of no acid, no alkali, no salt and no additive. The stirring in this step is carried out in a homogeneous reactor.
While the present invention has been described in terms of its functions and operations with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise functions and operations described above, and that the above-described embodiments are illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.
Claims (6)
1. A preparation method of sodium dodecyl sulfate modified magnetic nanoparticles is characterized by comprising the following steps:
the method comprises the following steps: FeCl is added3.6H2O、FeCl2.4H2O and HCl were dissolved in 50mL of deionized water to prepare stock solutions of ferrous and ferric chloride in a beaker, which was then degassed with nitrogen for 20 min; simultaneously, the NaOH solution was degassed with nitrogen for 15min and heated to 80 ℃ in the reactor; then, under the protection of nitrogen, dropwise adding stock solutions of ferrous iron and ferric chloride into a reactor of the NaOH solution by using a dropping funnel within 30min, and violently stirring by using a glassware stirrer; during the whole process, the solution temperature is kept at 80 ℃, nitrogen is blown to prevent oxygen from invading, and magnetite nanoparticles are formed through the reaction; after the reaction, separating the obtained magnetite nanoparticles from the reaction medium by a magnet, and then washing the magnetite nanoparticles with deionized water for several times; finally, the obtained magnetite nanoparticles were resuspended in 500mL of deionized water degassed with nitrogen; the pH value of the washed suspension is 11.0, the magnetite nanoparticles in the suspension are stable for one week under the condition, and finally the magnetite nanoparticles are taken out and fully washed by deionized water, and are dried for 24 hours in a vacuum drying oven at the temperature of 45 ℃ for later use;
step two: dispersing magnetite nanoparticles in trisodium citrate, treating in 80 ℃ water bath for 1h, then alternately washing with acetone and deionized water, and vacuum drying at 30 ℃ for 24h to obtain treated magnetite nanoparticles;
step three: and weighing a certain amount of sodium dodecyl sulfate, ultrasonically dissolving the sodium dodecyl sulfate in 200mL of deionized water, dispersing a certain amount of magnetite nanoparticles obtained in the second step in the deionized water after the magnetite nanoparticles are completely dissolved, stirring for 3 hours, separating the magnetite nanoparticles modified by the sodium dodecyl sulfate by using a magnet after the reaction is finished, fully washing the magnetite nanoparticles with the deionized water, and drying the magnetite nanoparticles modified by the sodium dodecyl sulfate in a vacuum drying oven at 60 ℃ for 12 hours.
2. The method of claim 1, wherein the FeCl is the material of step one3.6H2Mass of O10.4 g, FeCl2.4H2The mass of O was 10.4g, the HCl concentration was 12mol/L, the volume was 1.7mL, and the concentration of the NaOH solution was 1.5mol/L, the volume was 500 mL.
3. The method as claimed in claim 1, wherein the concentration of trisodium citrate in step two is 0.05-0.2mol/L, the volume is 200ml, the ratio of acetone to deionized water is 1:3, and the volume fraction of acetone is 99.5%.
4. The method of claim 1, wherein the magnetite nanoparticles in step three have a mass of 0.8g, Sodium Dodecyl Sulfate (SDS) mass of 0.2-1.6g, and a temperature of 20-70 ℃.
5. The method as claimed in claim 1, wherein the reactions of step two and step three are performed under the conditions of no acid, no alkali, no salt, and no additive.
6. The method for preparing sodium dodecyl sulfate modified magnetic nanoparticles as claimed in claim 1, wherein the stirring in step one and step three is performed in a homogeneous reactor, the stirring speed in step one is 1000r/min, and the stirring speed in step three is 400 r/min.
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| CN1474417A (en) * | 2003-08-13 | 2004-02-11 | 武汉理工大学 | High specific saturated magnetizing strengh Fe3O4 micro particles and its preparing method |
| CN101941842A (en) * | 2010-10-11 | 2011-01-12 | 东华大学 | Method for preparing graphene loaded ferroferric oxide magnetic nanometer particle composite material |
| US20130302428A1 (en) * | 2010-09-11 | 2013-11-14 | Dalian University Of Technology | Process for preparing carbon protected superparamagnetic or magnetic nanospheres |
| CN110451581A (en) * | 2019-08-30 | 2019-11-15 | 天津大学 | The preparation method of the double-deck ferroso-ferric oxide@silica magnetic composite nanometer particle |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474417A (en) * | 2003-08-13 | 2004-02-11 | 武汉理工大学 | High specific saturated magnetizing strengh Fe3O4 micro particles and its preparing method |
| US20130302428A1 (en) * | 2010-09-11 | 2013-11-14 | Dalian University Of Technology | Process for preparing carbon protected superparamagnetic or magnetic nanospheres |
| CN101941842A (en) * | 2010-10-11 | 2011-01-12 | 东华大学 | Method for preparing graphene loaded ferroferric oxide magnetic nanometer particle composite material |
| CN110451581A (en) * | 2019-08-30 | 2019-11-15 | 天津大学 | The preparation method of the double-deck ferroso-ferric oxide@silica magnetic composite nanometer particle |
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