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A kind of preparation method of civil ferrofluid

A ferrofluid and civil technology, applied in the field of ferrofluid, can solve problems such as product unevenness, toxic environment, pollution, etc., and achieve the effect of increasing life and improving stability

Inactive Publication Date: 2018-09-11
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it has a certain range of application in industry, and gradually enters the civilian field; at present, there are almost no strict industry standards for civil magnetic fluid, and the products are uneven. Most of them are industrial products and are sold in small batches to manufacturers of magnetic fluid products. Processing and manufacturing have certain toxicity and environmental pollution; the application in the civilian field can create a lot of economic value, but it is difficult to be widely used in civilian applications due to problems such as adhesion to container walls

Method used

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  • A kind of preparation method of civil ferrofluid

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preparation example Construction

[0018] A preparation method of civil ferrofluid, the method comprises the following steps:

[0019] (1) Add Fe with a weight ratio of 1:1 to the three-necked flask 2+ , Fe 3+ salt, and dilute it to a total iron concentration of 0.5-2mol / L;

[0020] (2) Heating to 40°C under the condition that the mechanical stirring speed is 700-1500r / min;

[0021] (3) After stirring for 10-40min at 40°C, add 20-50ml of concentrated lye, and stir for 20-90min;

[0022] (4) Heat to 60-95°C and add 1-5ml of surfactant, reduce the stirring speed to 200-500r / min and keep stirring for 0.5-24h;

[0023] (5) After the stirring is completed, add the carrier liquid dissolved with organic antioxidant, continue to stir for 10-35mim, add 5-30ml of separating agent, stir for 10min, then add the organic metal salt solution accounting for 5-20% of the weight of the carrier liquid, Cool to room temperature and separate the two phases with a magnet.

[0024] The Fe 2+ , Fe 3+ The salt is ferrous sulfate...

Embodiment 1

[0032] A method for preparing civil magnetic fluid, the method is composed of the following steps:

[0033] (1) Add Fe with a weight ratio of 1:1 to the three-necked flask 2+ , Fe 3+ salt, and dilute it to a total iron concentration of 0.5mol / L;

[0034] (2) Heating to 40°C under the condition that the mechanical stirring speed is 700r / min;

[0035] (3) After stirring at 40°C for 10 minutes, add 20ml of concentrated lye, and stir for 20 minutes;

[0036] (4) Then heat to 60°C and add 1ml of surfactant, reduce the stirring speed to 200r / min and keep stirring for 0.5h;

[0037] (5) After the stirring is completed, add the carrier liquid dissolved with organic antioxidant, continue to stir for 10 minutes, add 5ml of separating agent, after stirring for 10 minutes, add an organic metal salt solution accounting for 5% of the weight of the carrier liquid, cool to room temperature and separate with a magnet Two phases are enough.

Embodiment 2

[0039] A method for preparing civil magnetic fluid, the method is composed of the following steps:

[0040] (1) Add weight ratio 1:1e to the three-necked flask 2+ , Fe 3+ salt, and dilute it so that the total iron concentration is 2mol / L;

[0041] (2) Heating to 40°C under the condition that the mechanical stirring speed is 1500r / min;

[0042] (3) After stirring at 40°C for 40 minutes, add 50ml of concentrated lye, and stir for 90 minutes;

[0043] (4) Then heat to 95°C and add 5ml of surfactant, reduce the stirring speed to 500r / min and keep stirring for 24h;

[0044] (5) After the stirring is completed, add the carrier liquid dissolved with organic antioxidants, continue to stir for 35 minutes, add 30ml of separating agent, and after stirring for 10 minutes, add an organic metal salt solution accounting for 20% of the weight of the carrier liquid, cool to room temperature and separate with a magnet Two phases are enough.

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Abstract

The invention provides a method for preparing civilian use magnetic fluid. The method comprises the following steps: (1) Adding Fe2+, Fe3+ salt to a flask with three necks, and diluting the total iron concentration to 0.5-2 mol / L; (2) Heating to 40 DEG C under the condition of the mechanical agitation speed for 700-1500r / min; (3) Adding the dense alkali liquid of 20-50 ml after stirring for 10-40 min at 40 DEG C, and stirring for 20-90 min; (4) Heating to 60-95 DEG C and adding the surface-activeagent of 1-5 ml, and stirring; (5) Stirring continues after adding the base fluid soluting with the organic antioxidants , and stirring after adding the separating agent, and cooling down to ambient temperature after adding organic metal salt solution, by mass or weight, accounting for 5-20% of the base fluid, and separating with a magnet. The method has the advantages of: (1) Being high in security and stability; (2) Being environment-friendly and reliable; (3) Being safe and controllable in production process.

Description

technical field [0001] The invention proposes a preparation method of civil magnetic fluid, which belongs to the technical field of magnetic fluid. Background technique [0002] Magnetic fluid is a kind of nano-magnetic functional material, which has high research and application value. At present, it has a certain range of application in industry, and gradually enters the civilian field; at present, there are almost no strict industry standards for civil magnetic fluid, and the products are uneven. Most of them are industrial products and are sold in small batches to manufacturers of magnetic fluid products. Processing and manufacturing have certain toxicity and environmental pollution; the application in the civilian field can create a lot of economic value, but it is difficult to be widely used in civilian applications due to problems such as adhesion to container walls. Contents of the invention [0003] The present invention proposes a preparation method of civil mag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/44H01F41/02
CPCH01F1/44H01F41/0253
Inventor 龚吉
Owner NANJING FORESTRY UNIV
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