CN105869822A - Preparation method of p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid - Google Patents
Preparation method of p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid Download PDFInfo
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
- H01F1/445—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a compound, e.g. Fe3O4
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Abstract
The invention discloses a preparation method of a p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid. The p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid is prepared from three parts, namely p-MaFe2O4 magnetic particles, p-NiFe2O4 magnetic particles and base fluid. The preparation method comprises the following steps: respectively compounding the p-MaFe2O4 magnetic particles and the p-NiFe2O4 magnetic particles through a chemical coprecipitation method; then respectively mixing the p-MaFe2O4 magnetic particles and the p-NiFe2O4 magnetic particles with hydrochloric acid and the base fluid according to a certain proportion, and forming two kinds of unit ionic magnetic fluids of p-MaFe2O4 and p-NiFe2O4 in the same volume fraction; finally mixing the two kinds of magnetic fluids according to a volume ratio of 1:1, and thus forming the p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid. The preparation method of the p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid, disclosed by the invention, has the advantages that raw materials are commonly used, the operation is simple, the obtained magnetic fluid is high in stability, uniform in particle diameter and good in dispersibility, and the like. The p-MaFe2O4 and p-NiFe2O4 binary magnetic mixed ionic magnetic fluid is prepared through the preparation method, an embedding action of a surfactant does not exist, and the reaction is more flexible under a magnetic field.
Description
Technical field
The invention belongs to liquid magnetic field of material technology, be specifically related to p-MgFe2O4And p-NiFe2O4Binary magnetic mixes
Close the preparation method of ionic ferrofluid.
Background technology
At present the preparation method of magnetic liquid has polishing, anion-exchange resin method, hydrogen reduction method, thermal decomposition method, true
Empty evaporation, electricity method, chemical coprecipitation etc..Polishing is to be pulverized by magnetic-particle by the method for mechanical lapping, then warp
Filtering or be centrifuged and obtain magnetic liquid, this method milling time is long, high cost.Anion-exchange resin method be with iron content with
The aqueous solution of ferrous salt, processes with anion-exchange resin method and can produce the stable magnetic γ-Fe2O3 hydrosol.The oxygen made
Change iron particle averagely at 3～12 nm.Thermal decomposition method can obtain nano level magnetic liquid, but power consumption is bigger.Vacuum vapor deposition method
The magnetic fluid magnetic particle good dispersion of preparation, particle is little, uniform particle, but equipment and operation complexity.Electricity method be to pass through
Electrolysis makes Fe2+Separate out with the form of iron monomer, thus form magnetic liquid, but the kind of preparation is single.Chemical coprecipitation is
After metal ion each in magnetic nanoparticle is stoichiometrically mixed, with NaOH regulation pH value of solution by each precipitation by metallic ion
Getting off, period to be stirred continuously, then by separating, cleaning, except water, dry and grinding, prepares nano magnetic particle, and this method prepares
Magnetic particle epigranular, granularity is little, good dispersion, and the equipment of needs is simple, and preparation method is fairly simple.
Relative to surfactant type magnetic liquid, the preparation of ion magnetic magnetic liquid is simpler, cost is lower, pollution
Less, and there is physically better performance.
Summary of the invention
It is an object of the invention to provide a kind of p-MgFe2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid
The preparation method of body, it is characterised in that:
(1) p-MgFe2O4、p-NiFe2O4The preparation method of magnetic particle is as follows:
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
(2) p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid:
By p-MgFe2O4After magnetic particle, the HCl of 1mol/L and solvent mix for 1:3.3:20.7 by volume, obtain
p-MgFe2O4Unit ionic ferrofluid；
By p-NiFe2O4After magnetic particle, the HCl of 1mol/L and solvent mix for 1:2.85:21.15 by volume,
To p-NiFe2O4Unit ionic ferrofluid；
(3) p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid: by p-MgFe2O4Unit from
Subtype magnetic liquid and p-NiFe2O4Unit ionic ferrofluid shakes up according to the mixing of volume ratio 1:1, prepares p-MgFe2O4-
p-NiFe2O4Binary weak magnetic hybrid ionic type magnetic liquid.
P-MgFe of the present invention2O4Unit ionic ferrofluid, p-NiFe2O4Unit ionic ferrofluid
Volume fraction φVBeing 2%, Q value is 0.12.
P-MgFe in step of the present invention (2)2O4Control as 1:0.36, p-with the molar concentration rate of 1mol/L HCl
NiFe2O4Control as 1:0.36 with the molar concentration rate of 1mol/L HCl.
The invention have the advantage that this preparation method has the magnetic liquid stability that raw material is conventional, simple to operate, obtained
High, uniform particle diameter, the advantage such as good dispersion.Prepared by this method is ionic ferrofluid, does not has the embedding of surfactant to make
With, under magnetic field, react sensitiveer.p-MgFe2O4And p-NiFe2O4Magnetic is relatively weak and difference is less, reduce two kinds micro-
Impact between Li.
Detailed description of the invention
Below by embodiment, the invention will be further described.
Embodiment one
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid
Precise 3.644g p-MgFe2O4The HCl of magnetic particle and 6.6ml 1mol/L pours 50ml volumetric flask deionization into
Water constant volume, configures three bottles of identical p-MgFe2O4Unit magnetic liquid, hand 30min.In like manner precise 3.695g p-
NiFe2O4Magnetic particle pour into the HCl of 5.7ml 1mol/L 50ml volumetric flask spend deionized water constant volume configure three bottles identical
p-NiFe2O4Unit magnetic liquid, hand 30min.Then being diluted by deionized water, respectively obtaining volume fraction is
0.4%, the unit ionic ferrofluid of 0.8%, 1.2%, 1.6%.
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid
Respectively by unit p-MgFe identical for volume fraction2O4Magnetic liquid and unit p-NiFe2O4Magnetic liquid equal-volume mixes
Close, obtain the p-MgFe of different volumes mark2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid.
Embodiment two
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid
Precise 3.644g p-MgFe2O4The HCl of magnetic particle and 6.6ml 1mol/L pours 50ml volumetric flask polymethyl benzene into
Constant volume, configures three bottles of identical p-MgFe2O4Unit magnetic liquid, hand 30min.In like manner precise 3.695g p-
NiFe2O4Magnetic particle is poured 50ml volumetric flask into and is spent polymethyl benzene constant volume three bottles of identical p-of configuration with the HCl of 5.7ml 1mol/L
NiFe2O4Unit magnetic liquid, hand 30min.Then be diluted with polymethyl benzene, respectively obtain volume fraction be 0.4%,
0.8%, the unit ionic ferrofluid of 1.2%, 1.6%.
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid
Respectively by unit p-MgFe identical for volume fraction2O4Magnetic liquid and unit p-NiFe2O4Magnetic liquid equal-volume mixes
Close, obtain the p-MgFe of different volumes mark2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid.
Embodiment three
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid
Precise 3.644g p-MgFe2O4It is fixed that the HCl of magnetic particle and 6.6ml 1mol/L pours 50ml volumetric flask kerosene into
Hold, configure three bottles of identical p-MgFe2O4Unit magnetic liquid, hand 30min.In like manner precise 3.695g p-NiFe2O4
Magnetic particle is poured 50ml volumetric flask into and is spent kerosene constant volume three bottles of identical p-NiFe of configuration with the HCl of 5.7ml 1mol/L2O4Single
Unit's magnetic liquid, hand 30min.Then be diluted with kerosene, respectively obtain volume fraction be 0.4%, 0.8%, 1.2%,
The unit ionic ferrofluid of 1.6%.
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid
Respectively by unit p-MgFe identical for volume fraction2O4Magnetic liquid and unit p-NiFe2O4Magnetic liquid equal-volume mixes
Close, obtain the p-MgFe of different volumes mark2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid.
Embodiment four
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid
Precise 3.644g p-MgFe2O4It is fixed that the HCl of magnetic particle and 6.6ml 1mol/L pours 50ml volumetric flask silicone oil into
Hold, configure three bottles of identical p-MgFe2O4Unit magnetic liquid, hand 30min.In like manner precise 3.695g p-NiFe2O4
Magnetic particle is poured 50ml volumetric flask into and is spent silicone oil constant volume three bottles of identical p-NiFe of configuration with the HCl of 5.7ml 1mol/L2O4Single
Unit's magnetic liquid, hand 30min.Then be diluted with silicone oil, respectively obtain volume fraction be 0.4%, 0.8%, 1.2%,
The unit ionic ferrofluid of 1.6%.
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid
Respectively by unit p-MgFe identical for volume fraction2O4Magnetic liquid and unit p-NiFe2O4Magnetic liquid equal-volume mixes
Close, obtain the p-MgFe of different volumes mark2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid.
Embodiment five
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid
Precise 3.644g p-MgFe2O4The HCl of magnetic particle and 6.6ml 1mol/L pours 50ml volumetric flask polyethylene into
Alcohol constant volume, configures three bottles of identical p-MgFe2O4Unit magnetic liquid, hand 30min.In like manner precise 3.695g p-
NiFe2O4Magnetic particle pour into the HCl of 5.7ml 1mol/L 50ml volumetric flask spend polyvinyl alcohol constant volume configure three bottles identical
p-NiFe2O4Unit magnetic liquid, hand 30min.Then being diluted with polyvinyl alcohol, respectively obtaining volume fraction is
0.4%, the unit ionic ferrofluid of 0.8%, 1.2%, 1.6%.
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid
Respectively by unit p-MgFe identical for volume fraction2O4Magnetic liquid and unit p-NiFe2O4Magnetic liquid equal-volume mixes
Close, obtain the p-MgFe of different volumes mark2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid.
Embodiment six
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Mg (NO into3)2Solution is in order to prevent from working as FeCl3With Mg (NO3)2There is complex reaction), add 2.41mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Mg2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake acetone be dehydrated, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2Solution is (molten by HCl after mixing for 1:25 by volume
Liquid pours Ni (NO into3)2Solution is in order to prevent from working as FeCl3With Ni (NO3)2There is complex reaction), add 2.03mol/L's
FeCl3Solution, adds 4mol/L NaOH solution afterwards and (will be stirred, to allow solution during these solution mixes
Mix), wherein control Fe3+、Ni2+、OH-Mol ratio be 2:1:8；By above-mentioned mixed solution in the stirring of 2500r/min
Under speed, heating is until boiling, naturally cools to room temperature after 1min under room temperature；Product after cooling filters, and uses HNO3
Solution washs and is centrifuged again being precipitated, and repeats this process until joining the Fe (NO of boiling after being precipitated as neutrality3)3
In solution, naturally cool to room temperature after keeping boiling 30min under the mixing speed of 2500r/min, then filter, gained
Filter cake be dehydrated with acetone after, 60 DEG C of drying boxes are dried 24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid
Precise 3.644g p-MgFe2O4The HCl of magnetic particle and 6.6ml 1mol/L pours 50ml volumetric flask fluorine carbonization into
Compound constant volume, configures three bottles of identical p-MgFe2O4Unit magnetic liquid, hand 30min.In like manner precise 3.695g p-
NiFe2O4Magnetic particle pour into the HCl of 5.7ml 1mol/L 50ml volumetric flask spend fluorocarbons constant volume configure three bottles identical
P-NiFe2O4Unit magnetic liquid, hand 30min.Then being diluted with fluorocarbons, respectively obtaining volume fraction is
0.4%, the unit ionic ferrofluid of 0.8%, 1.2%, 1.6%.
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid
Respectively by unit p-MgFe identical for volume fraction2O4Magnetic liquid and unit p-NiFe2O4Magnetic liquid equal-volume mixes
Close, obtain the p-MgFe of different volumes mark2O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid.
Claims (3)
1. a p-MgFe2O4And p-NiFe2O4The preparation method of binary magnetic hybrid ionic type magnetic liquid, it is characterised in that
Method step is as follows:
p-MgFe2O4、p-NiFe2O4The preparation of magnetic particle:
By HCl solution and the 1.23mol/LMg (NO of 1mol/L3)2After solution mixes for 1:25 by volume, add
2.41mol/L FeCl3Solution, adds 4mol/L NaOH solution afterwards, wherein controls Fe3+、Mg2+、OH-Mol ratio be 2:
1:8；Above-mentioned mixed solution being heated until seething with excitement under the mixing speed of 2500r/min, naturally cooling under room temperature after 1min
Room temperature；Product after cooling filters, and uses HNO3Solution washs and is centrifuged again being precipitated, and repeats this process
Until joining the Fe (NO of boiling after being precipitated as neutrality3)3In solution, under the mixing speed of 2500r/min, keep boiling
Naturally cooling to room temperature after 30min, then filter, the filter cake acetone of gained is dehydrated, dry in 60 DEG C of drying boxes
Dry 24h, more ground process, obtain p-MgFe2O4Magnetic particle；
By HCl solution and the 1.00moi/L Ni (NO of 1mol/L3)2After solution mixes for 1:25 by volume, add
2.03mol/L FeCl3Solution, adds 4mol/L NaOH solution afterwards, wherein controls Fe3+、Ni2+、OH-Mol ratio be 2:
1:8；Above-mentioned mixed solution being heated until seething with excitement under the mixing speed of 2500r/min, naturally cooling under room temperature after 1min
Room temperature；Product after cooling filters, and washs with HNO3 solution and is centrifuged again being precipitated, repeats this process
Until joining the Fe (NO of boiling after being precipitated as neutrality3)3In solution, under the mixing speed of 2500r/min, keep boiling
Naturally cool to room temperature after 30min, then filter, after the filter cake of gained is dehydrated with acetone, be dried in 60 DEG C of drying boxes
24h, more ground process, obtain p-NiFe2O4Magnetic particle；
p-MgFe2O4、p-NiFe2O4The preparation of unit ionic ferrofluid:
By p-MgFe2O4After magnetic particle, the HCl of 1mol/L and base fluid mix for 1:3.3:20.7 by volume, obtain p-
MgFe2O4Unit ionic ferrofluid；
By p-NiFe2O4After magnetic particle, the HCl of 1mol/L and base fluid mix for 1:2.85:21.15 by volume, obtain
p-NiFe2O4Unit ionic ferrofluid；
p-MgFe2O4-p-NiFe2O4The preparation of binary weak magnetic hybrid ionic type magnetic liquid:
By p-MgFe2O4Unit ionic ferrofluid and p-NiFe2O4Unit ionic ferrofluid mixes according to volume ratio 1:1
Shake up, prepare p-MgFe2O4-p-NiFe2O4Binary weak magnetic hybrid ionic type magnetic liquid.
A kind of p-MgFe the most according to claim 12O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid
Preparation method, it is characterised in that: described p-MgFe2O4Unit ionic ferrofluid, p-NiFe2O4Unit ionic magnetic
Volume fraction φ of liquidVBeing 2%, Q value is 0.12.
A kind of p-MgFe the most according to claim 12O4And p-NiFe2O4Binary magnetic hybrid ionic type magnetic liquid
Preparation method, rises and is characterised by: p-MgFe in described step (2)2O4Control to be 1 with the molar concentration rate of 1mol/L HCl:
0.36, p-NiFe2O4Control as 1:0.36 with the molar concentration rate of 1mol/L HCl.
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