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A kind of preparation method of biological magnetic fluid

A biomagnetic and fluid technology, applied in the direction of magnetic liquid, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of magnetic particle and carrier liquid phase tolerance, uneven dispersion, easy agglomeration, etc., to achieve the preparation The process is simple, the stability is good, and the service life is improved

Active Publication Date: 2018-11-30
求法问律(菏泽)法律咨询服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: in view of the poor compatibility between the magnetic particles of the existing biological magnetic fluid material and the carrier liquid, which leads to its uneven dispersion in use and the problem of easy agglomeration, the black fungus is dehydrated and pulverized, and then Separation and collection, compounding black fungus gel and internal iron-containing magnetic polysaccharides, through the resource utilization of black fungus, make its carrier liquid and magnetic particles completely combined, enhance its dispersibility, and effectively solve the problem of magnetic particles in biological magnetic fluid materials. Poor compatibility with carrier fluid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First collect the black fungus and vacuum freeze-dry for 6 hours, then collect the dried black fungus, grind and pulverize it in a mortar to prepare black fungus powder, and weigh 15 parts of black fungus powder and 2 parts of citric acid tris Sodium and 65 parts of deionized water were heated in a water bath at 55°C for 25 minutes, then 15% sodium hydroxide solution was added dropwise to pH 8.0, and then kept for 45 minutes; Centrifuge at 3500r / min for 10min, collect the supernatant and the lower precipitate, and mix the supernatant and absolute ethanol for 10min at a volume ratio of 1:3, filter and collect the filter cake, and wash the filter cake with absolute ethanol and Wash three times with deionized water, dry at 45°C for 6 hours to prepare the magnetic black fungus extract; wash the lower precipitate collected above with deionized water until the washing liquid is neutral, then vacuum freeze-dry, and then grind to prepare To obtain the fungus gel powder, weigh 4...

example 2

[0018] First collect the black fungus and vacuum freeze-dry for 7 hours, then collect the dried black fungus, grind and pulverize it in a mortar, and prepare the black fungus powder. In parts by weight, weigh 17 parts of black fungus powder, 3 parts of citric acid three Sodium and 67 parts of deionized water were heated in a water bath at 57°C for 27 minutes, then 15% sodium hydroxide solution was added dropwise to pH 8.2, and then kept for 47 minutes; Centrifuge at 3750r / min for 12min, collect the supernatant and the lower precipitate, and mix the supernatant and absolute ethanol for 12min at a volume ratio of 1:3, filter and collect the filter cake, and wash the filter cake with absolute ethanol and Wash 4 times with deionized water, dry at 47°C for 7 hours to prepare the magnetic black fungus extract; wash the lower precipitate collected above with deionized water until the washing liquid is neutral, then vacuum freeze-dry, and then grind to prepare To obtain the fungus gel...

example 3

[0020] First collect the black fungus and vacuum freeze-dry for 8 hours, then collect the dried black fungus, grind and pulverize it in a mortar, and prepare the black fungus powder. In parts by weight, weigh 20 parts of black fungus powder, 3 parts of citric acid three Sodium and 70 parts of deionized water were heated in a water bath at 60°C for 30 minutes, then 15% sodium hydroxide solution was added dropwise to pH 8.5, and then kept for 60 minutes; Centrifuge at 4000r / min for 15min, collect the supernatant and the lower precipitate, and mix the supernatant and absolute ethanol for 15min at a volume ratio of 1:3, filter and collect the filter cake, and wash the filter cake with absolute ethanol and Wash with deionized water for 5 times, and dry at 50°C for 8 hours to prepare the magnetic black fungus extract; wash the lower precipitate collected above with deionized water until the washing liquid is neutral, then vacuum freeze-dry, and then grind to prepare To obtain the fu...

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Abstract

The invention relates a biology magnetic fluid preparation method, and belongs to the technical field of magnetic fluid preparation, which can solve the problem that magnetic particles of the conventional biology magnetic fluid materials are difficult to dissolve a carrier liquid, and then the magnetic particles are unevenly dispersed and are prone to aggregation in use. Dewatering and crushing is performed on black fungus; separation and collection is performed on black fungus powder; black fungus gel and polysaccharide containing ferromagnetism are composted; resource utilization is performed on the black fungus, a carrier liquid and magnetic particles of the black fungus can combined completely, and the dispersity is improved. According to the prepared biology magnetic fluid, the stability is improved by 15-20% more that of the similar products, and the service life is prolonged by 3-5%; the preparation process is simple; and the biology magnetic fluid is made of the black fungus and is safe and non-pollution.

Description

technical field [0001] The invention relates to a preparation method of biological magnetic fluid, which belongs to the technical field of magnetic fluid preparation. Background technique [0002] Magnetic fluid, also known as magnetic liquid, refers to nano-scale ferromagnetic or ferrimagnetic ultrafine particles (such as ferric oxide, iron nitride, etc.), which are modified by surfactant coating and stably dispersed in the carrier liquid. Colloidal solution formed in . This stable colloidal system, even under the long-term action of gravity, centrifugal force or strong magnetic field, not only does the ultrafine particles not agglomerate and maintains stable magnetic properties, but also the colloid of the magnetic liquid is not destroyed. As a colloidal system, magnetic fluid prevents agglomeration through the thermal movement of particles, so the composition of magnetic fluid is the main factor determining the stability. For a stable magnetic fluid system, the followin...

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 许斌蒋玉芳
Owner 求法问律(菏泽)法律咨询服务有限公司