CN108053962A - A kind of heat accumulation magnetic material of shell-like structure and preparation method thereof - Google Patents
A kind of heat accumulation magnetic material of shell-like structure and preparation method thereof Download PDFInfo
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- CN108053962A CN108053962A CN201711127375.4A CN201711127375A CN108053962A CN 108053962 A CN108053962 A CN 108053962A CN 201711127375 A CN201711127375 A CN 201711127375A CN 108053962 A CN108053962 A CN 108053962A
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- H—ELECTRICITY
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
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- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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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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- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
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- 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
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- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
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Abstract
Heat accumulation magnetic material the present invention relates to a kind of shell-like structure and preparation method thereof, including core, heat accumulation internal layer and magnetic outer layer, the shape of core is spherical, and heat accumulation internal layer is coated on the outer layer of core, and magnetic external sheath is in the outer layer of heat accumulation internal layer；The material of core is n-octadecane, and the material of heat accumulation internal layer is methyl methacrylate methacrylic acid polymer, and the material of magnetic outer layer is ferroso-ferric oxide.The present invention utilizes n-octadecane and methyl methacrylate methacrylic acid polymer, realize high effective heat-storage, ferroso-ferric oxide is synthesized on methyl methacrylate methacrylic acid polymer surface, the integration of heat accumulation and magnetic effect is formed, the heat accumulation magnetic material saturation magnetization intensity of synthesis is 12.5 emug‑1, hot break value can reach 152.2Jg‑1。
Description
Technical field
Heat accumulation magnetic material the present invention relates to a kind of shell-like structure and preparation method thereof.
Background technology
Electronic apparatus application is very extensive, but its fuel factor and electromagnetic radiation seriously limit its use scope, shadow
Security has been rung, it is promoted the use of and generates serious restriction.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency in the prior art, and provide a kind of with very big heat accumulation work(
It can and form heat accumulation magnetic material of shell-like structure for stablizing electromagnetic shielding and preparation method thereof.
Technical solution provided by the invention is：A kind of heat accumulation magnetic material of shell-like structure, it is characterised in that：Including core
Body, heat accumulation internal layer and magnetic outer layer, the shape of core is spherical, and heat accumulation internal layer is coated on the outer layer of core, magnetic external sheath
In the outer layer of heat accumulation internal layer；The material of core is n-octadecane, and the material of heat accumulation internal layer is methyl methacrylate-methacrylate
Polymer, the material of magnetic outer layer is ferroso-ferric oxide.Core is used as by n-octadecane, as composition heat accumulation magnetic material
Integral support, with being covered in methyl methacrylate-methacrylic acid polymer of core surface collectively as heat accumulation magnetic material
Heat accumulation main body.It can not be with ferroso-ferric oxide directly in conjunction with methyl methacrylate-methacrylate in view of n-octadecane
Polymer is the further heat storage capacity for increasing heat accumulation magnetic material on the basis of connecting material.While methyl methacrylate-
Methacrylic acid polymer has better stress-strain characteristics, can be more not easily broken in n-octadecane melting and solidification.Meanwhile
Synthesizing methylmethacrylate-methacrylic acid polymer is most inorganic organic less than other to prepare the cost of heat accumulation internal layer
The manufacturing cost of heat accumulation internal layer.
It is attached between heat accumulation internal layer of the present invention and magnetic outer layer by lauryl sodium sulfate.Methacrylic acid
Methyl esters-can not be directly attached between methacrylic acid polymer and ferroso-ferric oxide, using the hydrophilic of dodecyl sulphate and
Hydrophobic property, both ends are connected respectively with methyl methacrylate-methacrylic acid polymer and ferroso-ferric oxide so that have compared with
Good magnetic ferroso-ferric oxide is securely joined together with heat accumulation internal layer, forms the heat accumulation magnetism material of stable shell-like structure
Material realizes the integration of heat accumulation magnetism.
A kind of preparation method of the heat accumulation magnetic material of shell-like structure, it is characterised in that：Include the following steps：
1. configure aqueous mixture：It is dissolved to lauryl sodium sulfate as dispersant in distilled water, forms aqueous mixture；
2. configure oil mixture：N-octadecane, methyl methacrylate, methacrylate and benzoyl peroxide are mixed, shape
Into oil mixture；
Water oil mixture is formed 3. oil mixture is mixed with water and closes object heating mixing, in a nitrogen environment methyl-prop
The monomer of e pioic acid methyl ester and the monomer of methacrylate start polymerization and form methyl methacrylate-methacrylic acid polymer；
4. add in K into water oil mixture2S2O8Aqueous solution then stir, methyl methacrylate-methacrylic acid polymer
Further polymerization occurs and is coated on the phase-change microcapsule that core shell structure is generated on n-octadecane；
5. carrying out washing suction filtration and drying to phase-change microcapsule, the powder of core shell structure is formed；
6. the powder of core shell structure is dispersed in distilled water, while the lauryl sodium sulfate as surfactant is added in,
Then stir evenly to form uniform dispersion；
7. FeCl is added in a nitrogen environment to dispersion2·4H2O and FeCl3·6H2O stirring and dissolvings；
8. NH is added in into dispersion3· H2The pH to 10.0-11.0 that O adjusts dispersion continues to stir to get heat accumulation magnetism material
Feed powder end, then rinses drying by magnet adsorption, obtains the heat accumulation magnetic material of double-deck shell-like structure.
Step 1. -8. carry out successively.
Step of the present invention 3. in, using benzoyl peroxide as initiator, methyl methacrylate and methacrylate carry out
Polymerisation forms methyl methacrylate-methacrylic acid polymer, hydrophilic due to methyl methacrylate and methacrylate
Property, centered on n-octadecane, form the structure of heat accumulation internal layer cladding core.
Step of the present invention 5. in, for water oil mixture in vacuum filter and drying process, lauryl sodium sulfate is clear
It removes.
Step of the present invention 8. in, FeCl2·4H2O and FeCl3·6H2O utilizes the hydrophily of lauryl sodium sulfate and dredges
It is aqueous, form magnetic outer layer on the surface of core.
K of the present invention2S2O8As secondary initiator.
The temperature of step of the present invention 3. 4. 5. is controlled at 85 DEG C.Effectively reduce methyl methacrylate and methacrylate
The residual of monomer adds the coverage rate on n-octadecane.
The present invention compared with prior art, using n-octadecane and methyl methacrylate-methacrylic acid polymer, realizes
High effective heat-storage in methyl methacrylate-methacrylic acid polymer surface synthesis ferroso-ferric oxide, forms heat accumulation and magnetic effect
Integration, the heat accumulation magnetic material saturation magnetization intensity of synthesis is 12.5 emug-1, hot break value can reach 152.2Jg-1。
Specific embodiment
Below by embodiment, the present invention is described in further detail, following embodiment be explanation of the invention and
The invention is not limited in following embodiments.
Embodiment 1.
A kind of heat accumulation magnetic material of shell-like structure is present embodiments provided, including core, heat accumulation internal layer and magnetic outer layer,
The shape of core is spherical, and heat accumulation internal layer is coated on the outer layer of core, and magnetic external sheath is in the outer layer of heat accumulation internal layer.
Specifically, the preparation method of the heat accumulation magnetic material of shell-like structure, including synthesis core and synthesis heat accumulation magnetism material
Material.
Synthesis core includes the following steps：
1. configure oil mixture：N-octadecane, methyl methacrylate, methacrylate and benzoyl peroxide are mixed, shape
Into oil mixture；
2. the monomer of methyl methacrylate and the monomer of methacrylate start polymerization and form methyl at nitrogen environment and 85 DEG C
Methyl acrylate-methacrylic acid polymer；
3. K is added in into oil mixture2S2O8Aqueous solution at 85 DEG C and then stir, methyl methacrylate-methacrylate gathers
It closes object and the phase-change microcapsule that further polymerization is coated on generation core shell structure on n-octadecane occurs；
4. carrying out washing suction filtration and drying to phase-change microcapsule at 85 DEG C, the powder of core shell structure is formed.
In the present embodiment, the preparation process of the powder of core shell structure is without using lauryl sodium sulfate, the present embodiment core
The enthalpy of the powder of shell structure is 237.9Jg-1。
Synthesis heat accumulation magnetic material includes the following steps：
5. the powder of core shell structure is dispersed in distilled water, while the lauryl sodium sulfate as surfactant is added in,
Then stir evenly to form uniform dispersion；
6. FeCl is added in a nitrogen environment to dispersion2·4H2O and FeCl3·6H2O stirring and dissolvings；
7. NH is added in into dispersion3· H2The pH to 10.0-11.0 that O adjusts dispersion continues to stir to get heat accumulation magnetism material
Feed powder end, then rinses drying by magnet adsorption, obtains the heat accumulation magnetic material of double-deck shell-like structure.
Step 1. -7. carry out successively.
Core is used as by n-octadecane, as the integral support for forming heat accumulation magnetic material, with being covered in core surface
Methyl methacrylate-methacrylic acid polymer collectively as heat accumulation magnetic material heat accumulation main body.In view of n-octadecane
Can not with ferroso-ferric oxide directly in conjunction with, using methyl methacrylate-methacrylic acid polymer as connecting material on the basis of,
Further increase the heat storage capacity of heat accumulation magnetic material.Methyl methacrylate-methacrylic acid polymer, which has, simultaneously preferably should
Stress-strain properties can be more not easily broken in n-octadecane melting and solidification.Meanwhile synthesizing methylmethacrylate-isobutyl
Olefin(e) acid polymer is to prepare manufacturing cost of the cost of heat accumulation internal layer less than other most inorganic organic heat accumulation internal layers.
It is attached between heat accumulation internal layer and magnetic outer layer by lauryl sodium sulfate.Methyl methacrylate-isobutyl
It can not be directly attached between olefin(e) acid polymer and ferroso-ferric oxide, using the hydrophilic and hydrophobic property of dodecyl sulphate,
Its both ends is connected respectively with methyl methacrylate-methacrylic acid polymer and ferroso-ferric oxide so that has preferable magnetism
Ferroso-ferric oxide is securely joined together with heat accumulation internal layer, forms the heat accumulation magnetic material of stable shell-like structure, realizes storage
The integration of thermomagnetion.
Embodiment 2.
A kind of heat accumulation magnetic material of shell-like structure is present embodiments provided, including core, heat accumulation internal layer and magnetic outer layer,
The shape of core is spherical, and heat accumulation internal layer is coated on the outer layer of core, and magnetic external sheath is in the outer layer of heat accumulation internal layer.
Specifically, the preparation method of the heat accumulation magnetic material of shell-like structure, including synthesis core and synthesis heat accumulation magnetism material
Material.
Synthesis core includes the following steps：
1. configure aqueous mixture：It is dissolved to using 0.125g lauryl sodium sulfate as dispersant in distilled water, forms water phase
Mixture；
2. configure oil mixture：N-octadecane, methyl methacrylate, methacrylate and benzoyl peroxide are mixed, shape
Into oil mixture；
Water oil mixture is formed 3. oil mixture is mixed with water and closes object heating mixing, in nitrogen environment and at 85 DEG C
Under the conditions of the monomer of methyl methacrylate and the monomer of methacrylate start polymerization and form methyl methacrylate-methacrylate
Polymer；
4. add in K into water oil mixture2S2O8Aqueous solution under the conditions of 85 DEG C then stir, methyl methacrylate-different
Crotonic acid poiymers occur further polymerization and are coated on the phase-change microcapsule that core shell structure is generated on n-octadecane；
5. carrying out washing suction filtration and drying to phase-change microcapsule under the conditions of 85 DEG C, the powder of core shell structure is formed；
In the present embodiment, the preparation process of the powder of core shell structure uses 0.125g lauryl sodium sulfate, the present embodiment core
The enthalpy of the powder of shell structure is 143.9Jg-1。
Synthesis heat accumulation magnetic material includes the following steps：
6. the powder of core shell structure is dispersed in distilled water, while the lauryl sodium sulfate as surfactant is added in,
Then stir evenly to form uniform dispersion；
7. FeCl is added in a nitrogen environment to dispersion2·4H2O and FeCl3·6H2O stirring and dissolvings；
8. NH is added in into dispersion3· H2The pH to 10.0-11.0 that O adjusts dispersion continues to stir to get heat accumulation magnetism material
Feed powder end, then rinses drying by magnet adsorption, obtains the heat accumulation magnetic material of double-deck shell-like structure.
Core is used as by n-octadecane, as the integral support for forming heat accumulation magnetic material, with being covered in core surface
Methyl methacrylate-methacrylic acid polymer collectively as heat accumulation magnetic material heat accumulation main body.In view of n-octadecane
Can not with ferroso-ferric oxide directly in conjunction with, using methyl methacrylate-methacrylic acid polymer as connecting material on the basis of,
Further increase the heat storage capacity of heat accumulation magnetic material.Methyl methacrylate-methacrylic acid polymer, which has, simultaneously preferably should
Stress-strain properties can be more not easily broken in n-octadecane melting and solidification.Meanwhile synthesizing methylmethacrylate-isobutyl
Olefin(e) acid polymer is to prepare manufacturing cost of the cost of heat accumulation internal layer less than other most inorganic organic heat accumulation internal layers.
It is attached between heat accumulation internal layer and magnetic outer layer by lauryl sodium sulfate.Methyl methacrylate-isobutyl
It can not be directly attached between olefin(e) acid polymer and ferroso-ferric oxide, using the hydrophilic and hydrophobic property of dodecyl sulphate,
Its both ends is connected respectively with methyl methacrylate-methacrylic acid polymer and ferroso-ferric oxide so that has preferable magnetism
Ferroso-ferric oxide is securely joined together with heat accumulation internal layer, forms the heat accumulation magnetic material of stable shell-like structure, realizes storage
The integration of thermomagnetion.
Embodiment 3.
A kind of heat accumulation magnetic material of shell-like structure is present embodiments provided, including core, heat accumulation internal layer and magnetic outer layer,
The shape of core is spherical, and heat accumulation internal layer is coated on the outer layer of core, and magnetic external sheath is in the outer layer of heat accumulation internal layer.
Specifically, the preparation method of the heat accumulation magnetic material of shell-like structure, including synthesis core and synthesis heat accumulation magnetism material
Material.
Synthesis core includes the following steps：
1. configure aqueous mixture：It is dissolved to using 0.25g lauryl sodium sulfate as dispersant in distilled water, forms water and mutually mix
Close object；
2. configure oil mixture：N-octadecane, methyl methacrylate, methacrylate and benzoyl peroxide are mixed, shape
Into oil mixture；
Water oil mixture is formed 3. oil mixture is mixed with water and closes object heating mixing, in nitrogen environment and at 85 DEG C
Under the conditions of the monomer of methyl methacrylate and the monomer of methacrylate start polymerization and form methyl methacrylate-methacrylate
Polymer；
4. add in K into water oil mixture2S2O8Aqueous solution under the conditions of 85 DEG C then stir, methyl methacrylate-different
Crotonic acid poiymers occur further polymerization and are coated on the phase-change microcapsule that core shell structure is generated on n-octadecane；
5. carrying out washing suction filtration and drying to phase-change microcapsule under the conditions of 85 DEG C, the powder of core shell structure is formed；
In the present embodiment, the preparation process of the powder of core shell structure is using 0.25g lauryl sodium sulfate, core shell in the present embodiment
The enthalpy of the powder of structure is 171Jg-1。
Synthesis heat accumulation magnetic material includes the following steps：
6. the powder of core shell structure is dispersed in distilled water, while the lauryl sodium sulfate as surfactant is added in,
Then stir evenly to form uniform dispersion；
7. FeCl is added in a nitrogen environment to dispersion2·4H2O and FeCl3·6H2O stirring and dissolvings；
8. NH is added in into dispersion3· H2The pH to 10.0-11.0 that O adjusts dispersion continues to stir to get heat accumulation magnetism material
Feed powder end, then rinses drying by magnet adsorption, obtains the heat accumulation magnetic material of double-deck shell-like structure.
Core is used as by n-octadecane, as the integral support for forming heat accumulation magnetic material, with being covered in core surface
Methyl methacrylate-methacrylic acid polymer collectively as heat accumulation magnetic material heat accumulation main body.In view of n-octadecane
Can not with ferroso-ferric oxide directly in conjunction with, using methyl methacrylate-methacrylic acid polymer as connecting material on the basis of,
Further increase the heat storage capacity of heat accumulation magnetic material.Methyl methacrylate-methacrylic acid polymer, which has, simultaneously preferably should
Stress-strain properties can be more not easily broken in n-octadecane melting and solidification.Meanwhile synthesizing methylmethacrylate-isobutyl
Olefin(e) acid polymer is to prepare manufacturing cost of the cost of heat accumulation internal layer less than other most inorganic organic heat accumulation internal layers.
It is attached between heat accumulation internal layer and magnetic outer layer by lauryl sodium sulfate.Methyl methacrylate-isobutyl
It can not be directly attached between olefin(e) acid polymer and ferroso-ferric oxide, using the hydrophilic and hydrophobic property of dodecyl sulphate,
Its both ends is connected respectively with methyl methacrylate-methacrylic acid polymer and ferroso-ferric oxide so that has preferable magnetism
Ferroso-ferric oxide is securely joined together with heat accumulation internal layer, forms the heat accumulation magnetic material of stable shell-like structure, realizes storage
The integration of thermomagnetion.
Embodiment 4.
A kind of heat accumulation magnetic material of shell-like structure is present embodiments provided, including core, heat accumulation internal layer and magnetic outer layer,
The shape of core is spherical, and heat accumulation internal layer is coated on the outer layer of core, and magnetic external sheath is in the outer layer of heat accumulation internal layer.
Specifically, the preparation method of the heat accumulation magnetic material of shell-like structure, including synthesis core and synthesis heat accumulation magnetism material
Material.
Synthesis core includes the following steps：
1. configure aqueous mixture：It is dissolved to using 0.5g lauryl sodium sulfate as dispersant in distilled water, forms water and mutually mix
Close object；
2. configure oil mixture：N-octadecane, methyl methacrylate, methacrylate and benzoyl peroxide are mixed, shape
Into oil mixture；
Water oil mixture is formed 3. oil mixture is mixed with water and closes object heating mixing, in nitrogen environment and at 85 DEG C
Under the conditions of the monomer of methyl methacrylate and the monomer of methacrylate start polymerization and form methyl methacrylate-methacrylate
Polymer；
4. add in K into water oil mixture2S2O8Aqueous solution under the conditions of 85 DEG C then stir, methyl methacrylate-different
Crotonic acid poiymers occur further polymerization and are coated on the phase-change microcapsule that core shell structure is generated on n-octadecane；
5. carrying out washing suction filtration and drying to phase-change microcapsule under the conditions of 85 DEG C, the powder of core shell structure is formed；
In the present embodiment, the preparation process of the powder of core shell structure uses 0.125g lauryl sodium sulfate, the present embodiment core
The enthalpy of the powder of shell structure is 143Jg-1。
Synthesis heat accumulation magnetic material includes the following steps：
6. the powder of core shell structure is dispersed in distilled water, while the lauryl sodium sulfate as surfactant is added in,
Then stir evenly to form uniform dispersion；
7. FeCl is added in a nitrogen environment to dispersion2·4H2O and FeCl3·6H2O stirring and dissolvings；
8. NH is added in into dispersion3· H2The pH to 10.0-11.0 that O adjusts dispersion continues to stir to get heat accumulation magnetism material
Feed powder end, then rinses drying by magnet adsorption, obtains the heat accumulation magnetic material of double-deck shell-like structure.
Core is used as by n-octadecane, as the integral support for forming heat accumulation magnetic material, with being covered in core surface
Methyl methacrylate-methacrylic acid polymer collectively as heat accumulation magnetic material heat accumulation main body.In view of n-octadecane
Can not with ferroso-ferric oxide directly in conjunction with, using methyl methacrylate-methacrylic acid polymer as connecting material on the basis of,
Further increase the heat storage capacity of heat accumulation magnetic material.Methyl methacrylate-methacrylic acid polymer, which has, simultaneously preferably should
Stress-strain properties can be more not easily broken in n-octadecane melting and solidification.Meanwhile synthesizing methylmethacrylate-isobutyl
Olefin(e) acid polymer is to prepare manufacturing cost of the cost of heat accumulation internal layer less than other most inorganic organic heat accumulation internal layers.
It is attached between heat accumulation internal layer and magnetic outer layer by lauryl sodium sulfate.Methyl methacrylate-isobutyl
It can not be directly attached between olefin(e) acid polymer and ferroso-ferric oxide, using the hydrophilic and hydrophobic property of dodecyl sulphate,
Its both ends is connected respectively with methyl methacrylate-methacrylic acid polymer and ferroso-ferric oxide so that has preferable magnetism
Ferroso-ferric oxide is securely joined together with heat accumulation internal layer, forms the heat accumulation magnetic material of stable shell-like structure, realizes storage
The integration of thermomagnetion.
Each drug metering is removed in embodiment 1-4 uses the metering of lauryl sodium sulfate to generate variation as dispersant,
His all same.
Changed by the enthalpy of embodiment 1-4, the powder of core rises after falling before, and has absolutely proved dodecyl sulphate
Sodium largely affects the particle size of the powder of core in core preparation process again, while is tested and found by DSC, passes through
The covering of ferroso-ferric oxide, the thermal stability of core can be promoted further again.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Title etc. can be different, and the above content described in this specification is only to structure example explanation of the present invention.It is all according to
According to equivalence changes or simple change that construction, feature and the principle described in inventional idea of the present invention are done, it is included in this hair
In the protection domain of bright patent.Those skilled in the art can do described specific embodiment various
The modification of various kinds or supplement substitute in a similar way, without departing from structure of the invention or surmount present claims
Scope defined in book, is within the scope of protection of the invention.
Claims (8)
1. a kind of heat accumulation magnetic material of shell-like structure, it is characterised in that：Including core, heat accumulation internal layer and magnetic outer layer, core
Shape to be spherical, heat accumulation internal layer is coated on the outer layer of core, and magnetic external sheath is in the outer layer of heat accumulation internal layer；The material of core
For n-octadecane, the material of heat accumulation internal layer is methyl methacrylate-methacrylic acid polymer, and the material of magnetic outer layer is four oxygen
Change three-iron.
2. the heat accumulation magnetic material of shell-like structure according to claim 1, it is characterised in that：The heat accumulation internal layer and magnetism
It is attached between outer layer by lauryl sodium sulfate.
3. a kind of preparation method of the heat accumulation magnetic material of shell-like structure as claimed in claim 1 or 2, it is characterised in that：Bag
Include following steps：
1. configure aqueous mixture：It is dissolved to lauryl sodium sulfate as dispersant in distilled water, forms aqueous mixture；
2. configure oil mixture：N-octadecane, methyl methacrylate, methacrylate and benzoyl peroxide are mixed, shape
Into oil mixture；
Water oil mixture is formed 3. oil mixture is mixed with water and closes object heating mixing, in a nitrogen environment methyl-prop
The monomer of e pioic acid methyl ester and the monomer of methacrylate start polymerization and form methyl methacrylate-methacrylic acid polymer；
4. add in K into water oil mixture2S2O8Aqueous solution then stir, methyl methacrylate-methacrylic acid polymer
Further polymerization occurs and is coated on the phase-change microcapsule that core shell structure is generated on n-octadecane；
5. carrying out washing suction filtration and drying to phase-change microcapsule, the powder of core shell structure is formed；
6. the powder of core shell structure is dispersed in distilled water, while the lauryl sodium sulfate as surfactant is added in,
Then stir evenly to form uniform dispersion；
7. FeCl is added in a nitrogen environment to dispersion2·4H2O and FeCl3·6H2O stirring and dissolvings；
8. NH is added in into dispersion3· H2The pH to 10.0-11.0 that O adjusts dispersion continues to stir to get heat accumulation magnetic material
Then powder rinses drying by magnet adsorption, obtain the heat accumulation magnetic material of double-deck shell-like structure.
4. the preparation method of the heat accumulation magnetic material of shell-like structure according to claim 3, it is characterised in that：Step is 3.
In, using benzoyl peroxide as initiator, methyl methacrylate and methacrylate carry out polymerisation and form metering system
Sour methyl esters-methacrylic acid polymer, due to the hydrophily of methyl methacrylate and methacrylate, centered on n-octadecane,
Form the structure of heat accumulation internal layer cladding core.
5. the preparation method of the heat accumulation magnetic material of shell-like structure according to claim 4, it is characterised in that：Step is 5.
In, in vacuum filter and drying process, lauryl sodium sulfate is eliminated water oil mixture.
6. the preparation method of the heat accumulation magnetic material of shell-like structure according to claim 5, it is characterised in that：Step is 8.
In, FeCl2·4H2O and FeCl3·6H2O utilizes the hydrophily and hydrophobicity of lauryl sodium sulfate, in the surface shape of core
Into magnetic outer layer.
7. the preparation method of the heat accumulation magnetic material of shell-like structure according to claim 6, it is characterised in that：It is described
K2S2O8As secondary initiator.
8. the preparation method of the heat accumulation magnetic material of shell-like structure according to claim 4, it is characterised in that：3. 4. step
5. temperature control at 85 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127375.4A CN108053962B (en) | 2017-11-15 | 2017-11-15 | A kind of heat accumulation magnetic material of shell-like structure and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127375.4A CN108053962B (en) | 2017-11-15 | 2017-11-15 | A kind of heat accumulation magnetic material of shell-like structure and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108053962A true CN108053962A (en) | 2018-05-18 |
| CN108053962B CN108053962B (en) | 2019-11-08 |
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