CN101183590A - A kind of water-based magnetic fluid material coated with malic acid and its preparation - Google Patents
A kind of water-based magnetic fluid material coated with malic acid and its preparation Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 30
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 title claims abstract description 22
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000001630 malic acid Substances 0.000 title claims abstract description 22
- 235000011090 malic acid Nutrition 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 13
- 239000002244 precipitate Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- 239000012153 distilled water Substances 0.000 claims description 7
- 239000011790 ferrous sulphate Substances 0.000 claims description 7
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 7
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 150000002505 iron Chemical class 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 239000006228 supernatant Substances 0.000 claims 1
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- 239000002105 nanoparticle Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000000696 magnetic material Substances 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 238000004220 aggregation Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 229940099690 malic acid Drugs 0.000 description 11
- 229940116298 l- malic acid Drugs 0.000 description 5
- 239000002114 nanocomposite Substances 0.000 description 5
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
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- 108010010803 Gelatin Proteins 0.000 description 1
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- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
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- FZWBNHMXJMCXLU-BLAUPYHCSA-N isomaltotriose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@@H](OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O)O1 FZWBNHMXJMCXLU-BLAUPYHCSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
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- 238000000518 rheometry Methods 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
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- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 1
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- 235000011004 sodium tartrates Nutrition 0.000 description 1
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
本发明涉及一种苹果酸包覆的水基磁流体材料及其制备方法，属材料及其制备技术领域。所述的水基磁流体由磁性纳米Fe3O4、苹果酸包覆层和载体水组成，其中磁性纳米Fe3O4粒子颗粒直径为8.9－15.4nm，饱和磁化强度为31－45.6emu/g。本发明采用化学共沉淀法制备出纳米级Fe3O4，苹果酸中的羧基能与Fe3O4纳米粒子表面发生化学键合，包覆在粒子周围的苹果酸可阻止纳米粒子团聚从而形成稳定的磁流体。制得的纳米Fe3O4粒径小，且分布窄，包覆了苹果酸后的饱和磁化强度较强，是优良的磁性材料。制备方法操作简便，对仪器和实验条件的要求低，由于反应温度低，所以无须隔绝氧气，环保效应好。The invention relates to a malic acid-coated water-based magnetic fluid material and a preparation method thereof, belonging to the technical field of materials and their preparation. The water-based magnetic fluid is composed of magnetic nano Fe 3 O 4 , malic acid coating layer and carrier water, wherein the diameter of the magnetic nano Fe 3 O 4 particles is 8.9-15.4 nm, and the saturation magnetization is 31-45.6 emu/ g. The present invention adopts the chemical co-precipitation method to prepare nano-scale Fe 3 O 4 , the carboxyl group in malic acid can chemically bond with the surface of Fe 3 O 4 nanoparticles, and the malic acid coated around the particles can prevent the aggregation of nanoparticles to form a stable of magnetic fluid. The prepared nano-Fe 3 O 4 has small particle size and narrow distribution, and the saturation magnetization after being coated with malic acid is relatively strong, so it is an excellent magnetic material. The preparation method is simple and convenient to operate, has low requirements on instruments and experimental conditions, does not need to isolate oxygen because of the low reaction temperature, and has good environmental protection effect.
Description
技术领域technical field
本发明涉及一种水基磁流体材料，尤其是涉及一种苹果酸包覆的水基磁流体材料及其制备方法，属材料及其制备技术领域。The invention relates to a water-based magnetic fluid material, in particular to a malic acid-coated water-based magnetic fluid material and a preparation method thereof, belonging to the technical field of materials and their preparation.
背景技术Background technique
磁流体是一种随外加磁场变化有可控流变性的智能材料，它既有固体磁性材料的强磁性，又有液体的流动性，因此已成功应用到航天航空、电子、化工、机械、能源、冶金、生物医药等许多领域中。Magnetic fluid is a smart material with controllable rheology as the external magnetic field changes. It has both the strong magnetism of solid magnetic materials and the fluidity of liquids. Therefore, it has been successfully applied to aerospace, electronics, chemical industry, machinery, energy , metallurgy, biomedicine and many other fields.
磁流体载液的类型根据密封介质和工况选择，可以是水、煤油、硅油、汞等。随着绿色化学的发展，水基磁流体避免了有机溶剂对环境的污染，且水对人体无害，目前所有应用于生物医药的磁流体都以水为载液，所以水基磁流体在化工、环保、医疗等方面都有着很重要的应用前景。The type of ferrofluid carrier liquid is selected according to the sealing medium and working conditions, and can be water, kerosene, silicone oil, mercury, etc. With the development of green chemistry, water-based magnetic fluids avoid the pollution of organic solvents to the environment, and water is harmless to the human body. At present, all magnetic fluids used in biomedicine use water as the carrier liquid, so water-based magnetic fluids are used in chemical industry , environmental protection, medical and other aspects have very important application prospects.
目前用于制备水基磁流体的表面活性剂主要有油酸钠、十二烷基磺酸钠、聚乙二醇、柠檬酸、酒石酸钠、聚丙烯酸、聚乙烯醇等，而医疗用磁流体要考虑包覆层的生物相容性，因此常选择一些生物大分子如正癸酸、明胶、环糊精、葡聚糖、氨基酸等。The surfactants currently used to prepare water-based magnetic fluids mainly include sodium oleate, sodium dodecylsulfonate, polyethylene glycol, citric acid, sodium tartrate, polyacrylic acid, polyvinyl alcohol, etc., and medical magnetic fluids The biocompatibility of the coating layer should be considered, so some biomacromolecules such as n-decanoic acid, gelatin, cyclodextrin, dextran, amino acids, etc. are often selected.
本发明采用苹果酸为表面活性剂，用化学共沉淀法制得稳定的水基磁流体，操作简便易行且原料易得。The invention adopts malic acid as a surfactant, and prepares a stable water-based magnetic fluid by a chemical co-precipitation method, and the operation is simple and easy, and the raw materials are easy to obtain.
发明内容Contents of the invention
本发明的目的在于提供一种性能优异的苹果酸包覆的水基磁流体材料。The object of the present invention is to provide a water-based magnetic fluid material coated with malic acid with excellent performance.
本发明的另一目的在于提供一种操作简便、环境效应好的苹果酸包覆的水基磁流体的制备方法。Another object of the present invention is to provide a method for preparing malic acid-coated water-based magnetic fluid with simple operation and good environmental effect.
本发明所述的水基磁流体由磁性纳米Fe3O4、苹果酸包覆层和载体水组成，其中磁性纳米Fe3O4粒子颗粒直径为8.9-15.4nm，饱和磁化强度为31-45.6emu/g。The water-based magnetic fluid of the present invention is composed of magnetic nano Fe3O4, malic acid coating layer and carrier water, wherein the diameter of the magnetic nano Fe3O4 particles is 8.9-15.4nm, and the saturation magnetization is 31-45.6emu/g.
上述磁流体的制备方法，采用化学共沉淀法制得，其具体工艺步骤如下：The preparation method of the above-mentioned magnetic fluid is prepared by chemical co-precipitation method, and its specific process steps are as follows:
第一步，原料配备：将硝酸铁配制成0.12-0.36mol/L的水溶液，硫酸亚铁配制成0.08-0.24mol/L的水溶液，将苹果酸配制成0.17mol/L的水溶液；The first step, raw material preparation: prepare ferric nitrate into 0.12-0.36mol/L aqueous solution, ferrous sulfate into 0.08-0.24mol/L aqueous solution, and malic acid into 0.17mol/L aqueous solution;
第二步，纳米Fe3O4的制备：将配制好的铁盐溶液各取10ml混合，在40℃恒温水浴中，加入1.6-4.8ml氨水(25％)，搅拌15min，升温至60℃搅拌5min，停止反应。用蒸馏水洗涤生成的黑色沉淀，直至上层液体为中性；The second step, the preparation of nano-Fe3O4: take 10ml of the prepared iron salt solution and mix them, add 1.6-4.8ml of ammonia water (25%) in a constant temperature water bath at 40°C, stir for 15min, heat up to 60°C and stir for 5min, stop reaction. Wash the resulting black precipitate with distilled water until the upper liquid is neutral;
第三步，磁流体的制备：在洗净的沉淀中加入16-48ml水，搅拌均匀，超声，得黑色均一溶液，记为溶液A；取4-12ml配制好的苹果酸水溶液，分别加入0.027-0.081g NaOH，记为溶液B。将溶液B加入溶液A中，搅拌6h，超声2min，得稳定的水基磁流体。The third step, preparation of magnetic fluid: add 16-48ml of water to the washed precipitate, stir evenly, and ultrasonically obtain a black uniform solution, which is recorded as solution A; take 4-12ml of prepared malic acid aqueous solution, add 0.027 -0.081g NaOH, recorded as solution B. Add solution B to solution A, stir for 6 hours, and sonicate for 2 minutes to obtain a stable water-based magnetic fluid.
本发明方法的基本原理为：利用化学共沉淀法制备出纳米级Fe3O4，苹果酸中的羧基能与Fe3O4纳米粒子表面发生化学键合，包覆在粒子周围的苹果酸可阻止纳米粒子团聚从而形成稳定的磁流体。The basic principle of the method of the present invention is: use the chemical co-precipitation method to prepare nano-scale Fe 3 O 4 , the carboxyl group in malic acid can chemically bond with the surface of Fe 3 O 4 nanoparticles, and the malic acid coated around the particles can prevent The nanoparticles aggregate to form a stable magnetic fluid.
本发明方法与现有技术相比具有以下优点：Compared with the prior art, the inventive method has the following advantages:
(1)本发明采用化学共沉淀法制备Fe3O4，该方法操作简便，对仪器和实验条件的要求低，由于反应温度低，所以无须隔绝氧气。(1) The present invention adopts the chemical co-precipitation method to prepare Fe 3 O 4 , which is easy to operate, has low requirements on instruments and experimental conditions, and does not need to isolate oxygen because of the low reaction temperature.
(2)制得的纳米Fe3O4粒径小，且分布窄，包覆了苹果酸后的饱和磁化强度较强，是优良的磁性材料。(2) The prepared nano-Fe 3 O 4 has a small particle size and a narrow distribution, and the saturation magnetization after being coated with malic acid is relatively strong, so it is an excellent magnetic material.
(3)该磁流体以水为载液，以苹果酸为表面活性剂，对环境和人体均无害，符合绿色化学的要求。(3) The magnetic fluid uses water as a carrier liquid and malic acid as a surfactant, is harmless to the environment and human body, and meets the requirements of green chemistry.
(4)原料易得，易于工业应用。(4) The raw material is easy to obtain and easy for industrial application.
具体实施方式Detailed ways
实施例1：取10ml 0.12mol/L的硝酸铁溶液和10ml 0.08mol/L的硫酸亚铁溶液，混合并搅拌均匀，在40℃恒温水浴中，快速加入1.6ml氨水(25％)，搅拌15min，升温至60℃反应5min后停止。用蒸馏水洗涤生成的黑色沉淀，直至上层液体为中性，得到的就是纳米Fe3O4。向该沉淀中加入16ml水，超声2min可得一分散均一的黑色溶液，记为溶液A；取4ml 0.17mol/L的苹果酸水溶液，加入0.027g NaON，搅拌至完全溶解，记为溶液B。将溶液B加入溶液A中，搅拌6h使两者充分作用，超声2min，最终可得稳定的水基磁流体。该方法制得的纳米复合颗粒的粒径为8.9nm，饱和磁化强度为3 1emu/g。Embodiment 1: get the ferric nitrate solution of 10ml 0.12mol/L and the ferrous sulfate solution of 10ml 0.08mol/L, mix and stir evenly, in 40 ℃ constant temperature water bath, add 1.6ml ammoniacal liquor (25%) rapidly, stir 15min , the temperature was raised to 60°C and the reaction was stopped for 5 minutes. The resulting black precipitate was washed with distilled water until the upper liquid was neutral, and nano-Fe 3 O 4 was obtained. Add 16ml of water to the precipitate, and ultrasonicate for 2 minutes to obtain a uniformly dispersed black solution, which is recorded as solution A; take 4ml of 0.17mol/L malic acid aqueous solution, add 0.027g NaON, stir until completely dissolved, and record as solution B. Add solution B into solution A, stir for 6 hours to fully interact with each other, and ultrasonicate for 2 minutes to finally obtain a stable water-based magnetic fluid. The particle size of the nanocomposite particles prepared by the method is 8.9nm, and the saturation magnetization is 3 1emu/g.
实施例2：取10ml 0.18mol/L的硝酸铁溶液和10ml 0.12mol/L的硫酸亚铁溶液，混合并搅拌均匀，在40℃恒温水浴中，快速加入2.4ml氨水(25％)，搅拌15min，升温至60℃反应5min后停止。用蒸馏水洗涤生成的黑色沉淀，直至上层液体为中性。向该沉淀中加入24ml水，超声2min可得一分散均一的黑色溶液，记为溶液A；取6ml 0.17mol/L的苹果酸水溶液，加入0.04g NaOH，搅拌至完全溶解，记为溶液B。将溶液B加入溶液A中，搅拌6h，超声2min，最终可得稳定的水基磁流体。该方法制得的纳米复合颗粒的粒径为10.2nm，饱和磁化强度为33.5emu/g。Embodiment 2: get the ferric nitrate solution of 10ml 0.18mol/L and the ferrous sulfate solution of 10ml 0.12mol/L, mix and stir evenly, in 40 ℃ of constant temperature water baths, add 2.4ml ammoniacal liquor (25%) rapidly, stir 15min , the temperature was raised to 60°C and the reaction was stopped for 5 minutes. The resulting black precipitate was washed with distilled water until the upper liquid was neutral. Add 24ml of water to the precipitate, and sonicate for 2 minutes to obtain a uniformly dispersed black solution, which is recorded as solution A; take 6ml of 0.17mol/L malic acid aqueous solution, add 0.04g NaOH, stir until completely dissolved, and record as solution B. Add solution B to solution A, stir for 6 hours, and sonicate for 2 minutes to finally obtain a stable water-based magnetic fluid. The particle size of the nanocomposite particles prepared by the method is 10.2nm, and the saturation magnetization is 33.5emu/g.
实施例3：取10ml 0.24mol/L的硝酸铁溶液和10ml 0.16mol/L的硫酸亚铁溶液，混合并搅拌均匀，在40℃恒温水浴中，快速加入3.2ml氨水(25％)，搅拌15min，升温至60℃反应5min后停止。用蒸馏水洗涤生成的黑色沉淀，直至上层液体为中性。向该沉淀中加入32ml水，超声2min可得一分散均一的黑色溶液，记为溶液A；取8ml 0.17mol/L的苹果酸水溶液，加入0.054g NaOH，搅拌至完全溶解，记为溶液B。将溶液B加入溶液A中，搅拌6h，超声2min，最终可得稳定的水基磁流体。该方法制得的纳米复合颗粒的粒径为12nm，饱和磁化强度为36emu/g。Embodiment 3: get the ferric nitrate solution of 10ml 0.24mol/L and the ferrous sulfate solution of 10ml 0.16mol/L, mix and stir evenly, in 40 ℃ of constant temperature water baths, add 3.2ml ammoniacal liquor (25%) rapidly, stir 15min , the temperature was raised to 60°C and the reaction was stopped for 5 minutes. The resulting black precipitate was washed with distilled water until the upper liquid was neutral. Add 32ml of water to the precipitate, and ultrasonicate for 2min to obtain a uniformly dispersed black solution, which is recorded as solution A; take 8ml of 0.17mol/L malic acid aqueous solution, add 0.054g NaOH, stir until completely dissolved, and record as solution B. Add solution B to solution A, stir for 6 hours, and sonicate for 2 minutes to finally obtain a stable water-based magnetic fluid. The particle size of the nanocomposite particles prepared by the method is 12nm, and the saturation magnetization is 36emu/g.
实施例4：取10ml 0.3mol/L的硝酸铁溶液和10ml 0.2mol/L的硫酸亚铁溶液，混合并搅拌均匀，在40℃恒温水浴中，快速加入4ml氨水(25％)，搅拌15min，升温至60℃反应5min后停止。用蒸馏水洗涤生成的黑色沉淀，直至上层液体为中性。向该沉淀中加入40ml水，超声2min可得一分散均一的黑色溶液，记为溶液A；取10ml 0.17mol/L的苹果酸水溶液，加入0.068g NaOH，搅拌至完全溶解，记为溶液B。将溶液B加入溶液A中，搅拌6h，超声2min，最终可得稳定的水基磁流体。该方法制得的纳米复合颗粒的粒径为14.5nm，饱和磁化强度为42emu/g。Embodiment 4: get the ferric nitrate solution of 10ml 0.3mol/L and the ferrous sulfate solution of 10ml 0.2mol/L, mix and stir, in 40 ℃ of constant temperature water baths, add 4ml ammoniacal liquor (25%) rapidly, stir 15min, The temperature was raised to 60°C and the reaction was stopped after 5 minutes. The resulting black precipitate was washed with distilled water until the upper liquid was neutral. Add 40ml of water to the precipitate, and ultrasonicate for 2 minutes to obtain a uniformly dispersed black solution, which is recorded as solution A; take 10ml of 0.17mol/L malic acid aqueous solution, add 0.068g NaOH, stir until completely dissolved, and record as solution B. Add solution B to solution A, stir for 6 hours, and sonicate for 2 minutes to finally obtain a stable water-based magnetic fluid. The particle size of the nanocomposite particles prepared by the method is 14.5nm, and the saturation magnetization is 42emu/g.
实施例5：取10ml 0.36mol/L的硝酸铁溶液和10ml 0.24mol/L的硫酸亚铁溶液，混合并搅拌均匀，在40℃恒温水浴中，快速加入4.8ml氨水(25％)，搅拌15min，升温至60℃反应5min后停止。用蒸馏水洗涤生成的黑色沉淀，直至上层液体为中性。向该沉淀中加入48ml水，超声2min可得一分散均一的黑色溶液，记为溶液A；取12ml 0.17mol/L的苹果酸水溶液，加入0.081g NaOH，搅拌至完全溶解，记为溶液B。将溶液B加入溶液A中，搅拌6h，超声2min，最终可得稳定的水基磁流体。该方法制得的纳米复合颗粒的粒径为15.4nm，饱和磁化强度为45.6emu/g。Embodiment 5: get the ferric nitrate solution of 10ml 0.36mol/L and the ferrous sulfate solution of 10ml 0.24mol/L, mix and stir evenly, in 40 ℃ of constant temperature water baths, add 4.8ml ammoniacal liquor (25%) rapidly, stir 15min , the temperature was raised to 60°C and the reaction was stopped for 5 minutes. The resulting black precipitate was washed with distilled water until the upper liquid was neutral. Add 48ml of water to the precipitate, and ultrasonicate for 2min to obtain a uniformly dispersed black solution, which is recorded as solution A; take 12ml of 0.17mol/L malic acid aqueous solution, add 0.081g NaOH, stir until completely dissolved, and record as solution B. Add solution B to solution A, stir for 6 hours, and sonicate for 2 minutes to finally obtain a stable water-based magnetic fluid. The particle size of the nanocomposite particles prepared by the method is 15.4nm, and the saturation magnetization is 45.6emu/g.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101307192B (en) * | 2008-07-02 | 2011-04-06 | 北京航空航天大学 | Ferroferric oxide nanometer particles with excellent water dispersancy and method for preparing same |
| CN101882495B (en) * | 2009-05-09 | 2011-12-21 | 西北师范大学 | Nano Fe3O4/ polystyrene-maleic anhydride magnetic hybrid material and preparation method thereof |
| CN101901656B (en) * | 2009-12-24 | 2013-01-16 | 陕西北美基因股份有限公司 | Preparation method of magnetic particle with surface modified isothiocyanato active group |
| CN103273081A (en) * | 2013-05-31 | 2013-09-04 | 上海师范大学 | Process for preparing ferriferrous oxide magnetic fluid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307192B (en) * | 2008-07-02 | 2011-04-06 | 北京航空航天大学 | Ferroferric oxide nanometer particles with excellent water dispersancy and method for preparing same |
| CN101882495B (en) * | 2009-05-09 | 2011-12-21 | 西北师范大学 | Nano Fe3O4/ polystyrene-maleic anhydride magnetic hybrid material and preparation method thereof |
| CN101901656B (en) * | 2009-12-24 | 2013-01-16 | 陕西北美基因股份有限公司 | Preparation method of magnetic particle with surface modified isothiocyanato active group |
| CN103273081A (en) * | 2013-05-31 | 2013-09-04 | 上海师范大学 | Process for preparing ferriferrous oxide magnetic fluid |
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