JPS633099A - Production of magnetic fluid - Google Patents
Production of magnetic fluidInfo
- Publication number
- JPS633099A JPS633099A JP61147812A JP14781286A JPS633099A JP S633099 A JPS633099 A JP S633099A JP 61147812 A JP61147812 A JP 61147812A JP 14781286 A JP14781286 A JP 14781286A JP S633099 A JPS633099 A JP S633099A
- Authority
- JP
- Japan
- Prior art keywords
- base oil
- boiling point
- low
- magnetic fluid
- boiling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002199 base oil Substances 0.000 claims abstract description 40
- 238000009835 boiling Methods 0.000 claims abstract description 40
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 230000001678 irradiating effect Effects 0.000 claims abstract description 3
- 150000002790 naphthalenes Chemical class 0.000 claims abstract description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract 2
- 229930195733 hydrocarbon Natural products 0.000 claims abstract 2
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000003921 oil Substances 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 3
- -1 alkyl dicarboxylic acid ester Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 239000011882 ultra-fine particle Substances 0.000 abstract description 8
- 239000006185 dispersion Substances 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 4
- 230000005415 magnetization Effects 0.000 abstract description 4
- 238000006467 substitution reaction Methods 0.000 abstract description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical class OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 abstract 1
- 125000005907 alkyl ester group Chemical group 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- ZHGIKBCGOGBDFG-UHFFFAOYSA-N 1-icosylnaphthalene Chemical compound C1=CC=C2C(CCCCCCCCCCCCCCCCCCCC)=CC=CC2=C1 ZHGIKBCGOGBDFG-UHFFFAOYSA-N 0.000 description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 1
- QYWXVBFLPIGNNL-UHFFFAOYSA-L disodium butanedioate 1-octylsulfonyloctane Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O.CCCCCCCCS(=O)(=O)CCCCCCCC QYWXVBFLPIGNNL-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁性流体の製造法に関する。更に詳しくは、
界面活性剤を吸着させたフェライト類超微粒子を所望の
高沸点基油中に分散させる磁性流体の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing magnetic fluids. For more details,
The present invention relates to a method for producing a magnetic fluid in which ultrafine ferrite particles adsorbed with a surfactant are dispersed in a desired high-boiling base oil.
強アルカリによる共沈法で得られたフェライト類（マグ
ネタイト、Ｍｎ−フェライト、Ｎｉ−フェライト、Ｍｎ
−Ｎｉ−フェライト、 Ｎｉ４ｎ−フェライトなど）の
超微粒子の水性けん濁液に、オレイン酸ナトリウム、ソ
ジウムジオクチルスルホンサクシネート（商品名Ａｅｒ
ｏｓｏｌ ＯＴ）などによって代表される各種の界面活
性剤を加え、これを例えば９０°Ｃ１３０分間加熱する
ことにより、フェライト類超微粒子に界面活性剤を吸着
させ、この界面活性剤吸着フェライト類超微粒子を減圧
乾燥した後、エイコシルナフタリンによって代表される
高級アルキル置換ナフタリン、セバシン酸ジオクチル、
アジピン酸ジオクチルによって代表されるジカルボン酸
ジ高級アルキルエステルなどの沸点約１５０℃以上の高
沸点基油中に、超音波を照射しながら分散せしめること
が従来から行われている。Ferrites obtained by coprecipitation with strong alkali (magnetite, Mn-ferrite, Ni-ferrite, Mn
Sodium oleate and sodium dioctyl sulfone succinate (trade name Aer
By adding various surfactants such as Osol OT and heating it for 130 minutes at 90°C, the surfactant is adsorbed to the ferrite ultrafine particles, and the surfactant-adsorbed ferrite ultrafine particles are After drying under reduced pressure, higher alkyl substituted naphthalenes typified by eicosylnaphthalene, dioctyl sebacate,
Conventionally, it has been carried out to disperse in a high boiling point base oil having a boiling point of about 150° C. or higher, such as a dihigher alkyl dicarboxylic acid typified by dioctyl adipate, while irradiating it with ultrasonic waves.
これは、磁性流体が濃縮されると超微粒子の分散安定性
が悪化するために、低蒸気圧、高沸点の基油を用いて、
基油の蒸発による濃縮を防止せんとしているのである。This is because the dispersion stability of ultrafine particles deteriorates when the magnetic fluid is concentrated, so a base oil with a low vapor pressure and high boiling point is used.
This is intended to prevent the base oil from condensing due to evaporation.
しかしながら、このような分散方法によったのでは、凝
集粉にこれらの基油が浸透しないため、全く分散が行わ
れないことが多い。However, when such a dispersion method is used, these base oils do not penetrate into the aggregated powder, so dispersion is often not performed at all.
そこで、本発明者らは、界面活性剤吸着フェライト類超
微粒子を所望の高沸点基油中に有効に分散させる方法に
ついて検討した結果、低沸点基油に一旦分散させたフェ
ライト類超微粒子を溶剤基油の置換法により高沸点基油
に分散させる方法がきわめて有効であることを見出した
。Therefore, the present inventors investigated a method for effectively dispersing surfactant-adsorbed ultrafine ferrite particles in a desired high-boiling point base oil. It has been found that a method of dispersing in a high boiling point base oil using a base oil substitution method is extremely effective.
従って、本発明は磁性流体の製造法に係り、磁性流体の
製造法は、界面活性剤を吸着させたフェライト類超微粒
子を一旦低沸点基油に分散させた後、該低沸点基油と相
溶性を有する沸点約１５０℃以上の高沸点基油と混合し
、超音波を照射しながら低沸点基油を蒸発除去する溶剤
基油の置換法によって行われる。Therefore, the present invention relates to a method for producing a magnetic fluid, and the method for producing a magnetic fluid involves first dispersing ultrafine ferrite particles on which a surfactant has been adsorbed into a low-boiling base oil, and then phase it with the low-boiling base oil. This is carried out by a solvent base oil replacement method in which the base oil is mixed with a soluble high boiling point base oil having a boiling point of about 150° C. or more, and the low boiling point base oil is evaporated off while being irradiated with ultrasonic waves.
界面活性剤を吸着させたフェライト類超微粒子としては
、従来公知のものが乾燥した上でそのまま用いられ、こ
れを低沸点基油、好ましくはシクロヘキサン、トルエン
などの沸点が約３０〜１００℃の炭化水素溶剤中に一旦
分散させる。ここでは、−般に超微粒子濃度が約０．１
〜１．３ｇ／ｍ１２になるように低沸点基油が用いられ
る。これ以上の濃度に調製されると、フェライト類超微
粒子はゲル化してしまい、磁性液体をもはや形成しない
。As ultrafine ferrite particles adsorbed with a surfactant, conventionally known particles can be used as they are after drying, and these are carbonized with a low boiling point base oil, preferably cyclohexane, toluene, etc. having a boiling point of about 30 to 100°C. Disperse once in a hydrogen solvent. Here, the ultrafine particle concentration is generally about 0.1
A low boiling point base oil is used to give ~1.3 g/m12. If the concentration is higher than this, the ultrafine ferrite particles will gel and will no longer form a magnetic liquid.
次いで、この低沸点基油分散磁性流体を、最終的に求め
られる磁性流体の超微粒子濃度に応じた量の、低沸点基
油と相溶性を有する高沸点基油と混合し、超音波を照射
しながら低沸点基油を一般に約１０〜３００ｍｍＨｇの
減圧条件下で蒸発除去すると、溶剤基油の置換によって
高沸点基油分散磁性流体が得られる。Next, this low-boiling point base oil-dispersed magnetic fluid is mixed with a high-boiling point base oil that is compatible with the low-boiling point base oil in an amount corresponding to the ultimately required ultrafine particle concentration of the magnetic fluid, and irradiated with ultrasound. However, when the low boiling base oil is removed by evaporation under reduced pressure conditions, generally from about 10 to 300 mm Hg, a high boiling base oil dispersed magnetic fluid is obtained by replacement of the solvent base oil.
本発明方法によれば、界面活性剤吸着フェライト類超微
粒子を一旦低沸点基油に分散させ、これを溶剤基油の置
換法により高沸点基油と置換することにより、低沸点基
油分散磁性流体の良好な分散性および飽和磁化を保持し
たまま、フェライト類超微粒子を高沸点基油に分散させ
た磁性流体を得ることができる。According to the method of the present invention, ultrafine particles of surfactant-adsorbed ferrites are once dispersed in a low-boiling point base oil, and this is replaced with a high-boiling point base oil by a solvent base oil substitution method, thereby creating a low-boiling point base oil-dispersed magnetic material. It is possible to obtain a magnetic fluid in which ultrafine ferrite particles are dispersed in a high-boiling base oil while maintaining good dispersibility and saturation magnetization of the fluid.
次に、実施例について本発明を説明する。 Next, the present invention will be explained with reference to examples.
実施例
ＦｅＣ１，・ｎＨ，０２０ｇおよびＦｅＣ１，・６Ｈ，
０５０ｇをそれぞれ水１００ｍｆｌに溶解させた後混合
し、そこに６Ｎ ＮａＯＨ水溶液をＰ）Ｉｌｌになる迄
、１０ｍ ｆｔ ／分の滴下速度で攪拌下に滴下する０
滴下終了後、１００°Ｃで３０分間加熱還流させた後冷
却し、水で洗浄する。洗浄された水性けん濁液の全量を
５００ｍ １２とした後、そこにオレイン酸ナトリウム
６ｇを加え、９０℃で３０分間加熱してから水で洗浄し
、乾燥する。Examples FeC1,·nH,020g and FeC1,·6H,
After dissolving 050 g of each in 100 mfl of water and mixing, 6N NaOH aqueous solution was added dropwise thereto under stirring at a dropping rate of 10 m ft/min until it reached P).
After the dropwise addition is completed, the mixture is heated under reflux at 100°C for 30 minutes, cooled, and washed with water. After the total volume of the washed aqueous suspension was brought to 500 m 12 , 6 g of sodium oleate was added thereto, heated at 90° C. for 30 minutes, washed with water, and dried.
得られた界面活性剤吸着マグネタイト超微粒子２３ｇを
シクロヘキサン１００ｍｆｌに分散させ、飽和磁化３．
４ Ｘ １Ｏ−３Ｔ（１，３ＫＡ／ｍ印加時）の磁性流
体を得た。23 g of the obtained surfactant-adsorbed magnetite ultrafine particles were dispersed in 100 mfl of cyclohexane, and the saturation magnetization was 3.
A magnetic fluid of 4×1O-3T (at the time of application of 1,3 KA/m) was obtained.
この磁性流体１００ｍαをエイコシルナフタリン１００
ｍ Ｑと混合した後、超音波を照射しながらシクロヘキ
サンを５０ｍ＋＊Ｈｇの減圧条件下で室温で蒸発除去す
ると、エイコシルナフタリンを基油とする磁性流体が得
られ、この磁性流体は３．４ Ｘ １Ｏ−３Ｔ（１，３
ＫＡ／ｍ印加時）の飽和磁化を維持していた。100 mα of this magnetic fluid is mixed with 100 mα of eicosylnaphthalene.
After mixing with mQ, cyclohexane is removed by evaporation at room temperature under a reduced pressure of 50m+*Hg while being irradiated with ultrasound to obtain a magnetic fluid with eicosylnaphthalene as a base oil, and this magnetic fluid has a X 1O-3T(1,3
When applying KA/m), the saturation magnetization was maintained.
比較例
実施例において、界面、活性剤吸着マグネタイト超微粒
子２３ｇをエイコシルナフタリン１００＋ｗ ｒｌ中に
加え、超音波照射を行なったが、殆んど分散は生じなか
った。Comparative Example In the example, 23 g of ultrafine magnetite particles adsorbing an interfacial active agent were added to 100+ wr of eicosylnaphthalene and irradiated with ultrasonic waves, but almost no dispersion occurred.
Claims (1)
旦低沸点基油に分散させた後、該低沸点基油と相溶性を
有する沸点約１５０℃以上の高沸点基油と混合し、超音
波を照射しながら低沸点基油を蒸発除去し、溶剤基油の
置換を行なうことを特徴とする磁性流体の製造法。 ２、低沸点基油が沸点約３０〜１００℃の炭化水素溶剤
である特許請求の範囲第１項記載の磁性流体の製造法。 ３、高沸点基油が高級アルキル置換ナフタリンである特
許請求の範囲項記載の磁性流体の製造法。 ４、高沸点基油がジカルボン酸ジ高級アルキルエステル
である特許請求の範囲第１項記載の磁性流体の製造法。[Scope of Claims] 1. After the ultrafine ferrite particles adsorbed with a surfactant are once dispersed in a low-boiling base oil, a high-boiling group with a boiling point of about 150°C or higher that is compatible with the low-boiling base oil is added. A method for producing a magnetic fluid, characterized by mixing it with oil, evaporating the low boiling point base oil while irradiating it with ultrasonic waves, and replacing it with a solvent base oil. 2. The method for producing a magnetic fluid according to claim 1, wherein the low boiling point base oil is a hydrocarbon solvent with a boiling point of about 30 to 100°C. 3. The method for producing a magnetic fluid according to the claims, wherein the high-boiling base oil is a higher alkyl-substituted naphthalene. 4. The method for producing a magnetic fluid according to claim 1, wherein the high-boiling base oil is a dihigher alkyl dicarboxylic acid ester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147812A JPS633099A (en) | 1986-06-24 | 1986-06-24 | Production of magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147812A JPS633099A (en) | 1986-06-24 | 1986-06-24 | Production of magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS633099A true JPS633099A (en) | 1988-01-08 |
Family
ID=15438774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61147812A Pending JPS633099A (en) | 1986-06-24 | 1986-06-24 | Production of magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS633099A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01302705A (en) * | 1988-05-31 | 1989-12-06 | Nok Corp | Manufacture of magnetic fluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516080A (en) * | 1978-07-19 | 1980-02-04 | Taptrust Ltd | Lubricant composition |
| JPS58174495A (en) * | 1982-04-07 | 1983-10-13 | Nippon Seiko Kk | Preparation of magnetic fluid |
-
1986
- 1986-06-24 JP JP61147812A patent/JPS633099A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516080A (en) * | 1978-07-19 | 1980-02-04 | Taptrust Ltd | Lubricant composition |
| JPS58174495A (en) * | 1982-04-07 | 1983-10-13 | Nippon Seiko Kk | Preparation of magnetic fluid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01302705A (en) * | 1988-05-31 | 1989-12-06 | Nok Corp | Manufacture of magnetic fluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8012450B2 (en) | Method for making mesoporous material | |
| CN106031862A (en) | Magnetic carbon nanotube composite material and preparation method and application thereof and method for removing pollutants in water | |
| Huang et al. | Facile one-pot synthesis of β-cyclodextrin-polymer-modified Fe 3 O 4 microspheres for stereoselective absorption of amino acid compounds | |
| JPH0727813B2 (en) | Magnetic fluid composition | |
| CN111467563B (en) | Synthetic method of RGO/MWCNT/HA/Fe3O4 composite material | |
| JP6555483B2 (en) | Acicular strontium carbonate fine particles and dispersions thereof | |
| JP2008110889A (en) | Method for production of ferric oxide particle | |
| CN105129765A (en) | Highly-ordered mesoporous carbon spheres and preparation method thereof | |
| CN108816179B (en) | Porous high-specific-surface-area amorphous MnPO material and preparation method and application thereof | |
| DE19923625A1 (en) | Production of redispersible metal (hydr)oxide nanoparticles, especially magnetic metal oxide for ferrofluid, involves precipitation from aqueous metal salt solution with base in presence of polymeric carboxylic acid | |
| JPS633099A (en) | Production of magnetic fluid | |
| CN108940187A (en) | Magnetic mesoporous nanosphere and preparation method thereof for dephosphorization load lanthanum hydroxide | |
| JPS638488A (en) | Production of magnetic fluid | |
| CN110203899A (en) | Fe doped hydroxyapatite nanocages material and preparation method thereof, adsorption method | |
| CN108795438A (en) | A kind of preparation and application of heavy metal-polluted soil leacheate | |
| JPH0477689B2 (en) | ||
| Qiao et al. | Efficient synthesis of sub-5 nm Ag nanoparticles by the desorption effect of supercritical CO2 in SBA-15 | |
| CN106215906A (en) | The preparation and application that a kind of magnetic iron oxide/ammonium phosphomolybdate is composite porous | |
| CN113755884A (en) | Reusable nano core-shell structure mimic enzyme material and preparation method thereof | |
| JPH1059716A (en) | Spherical aggregate of platy calcium carbonate and its production | |
| RU2618069C1 (en) | Method of producing magnetic liquid | |
| JPH0476484B2 (en) | ||
| JPH0661032A (en) | Water base magnetic fluid composition | |
| JPS61189607A (en) | Production of magnetic fluid | |
| RU2372292C1 (en) | Method of producing water based magnetic liquid |