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| No.9657563
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Information Name: | Iron oxide nano- |
Published: | 2013-11-08 |
Validity: | 30 |
Specifications: | |
Quantity: | 1.00 |
Price Description: | |
Detailed Product Description: | Nano-iron oxide (MH-Fe3O4) Features: iron oxide is an iron salts, namely Fe2 + Fe3 + (Fe3 + O4) (ie FeFe (FeO4) front 2 + and Fe 3 + valence state representatives ). In Fe3O4, the valence of iron were two kinds, one iron atom were +2, two iron atoms are trivalent, so that the iron oxide can be considered to consist of a compound consisting of FeO and Fe2O3, can be expressed as FeO · Fe2O3, and can not be said to be composed of a mixture of FeO and Fe2O3, it belongs to the pure iron oxide was placed in nanometer medium, using the method and the addition of modified peptized dispersant agent method, the surface of the particles adsorbed bis layer structure prevents agglomeration of nanoparticles, preparation of stable dispersion of water-and organic-based nano-magnetic fluid. Prepared magnetic liquid 2 to 12 months can be a good dispersion of magnetic particles in the liquid 16 ~ 35nm average particle size of between. Parameters index: Purity:> 99%, average particle size: 20nm, specific surface area:> 60 m2 / g, Color: Black, Shape: spherical particles, bulk density: 0.84 g/cm3, true density: 4.8-5.1 g/cm3 , molecular weight: 231.54, density: 5.18g/cm ^ 3, melting point: 1867.5K (1594.5 ℃) main purposes: (1), the magnetic seal: magnetic fluid called magnetic fluid or ferrofluid controlled by a magnetic field having its physical performance characteristics, a liquid carrier mobility, lubrication and sealing. It is composed of nanometer (10nm or less) of the ferromagnetic fine particles dispersed in a liquid height in the formation of a stable colloidal system. Mechanical seal used as a rotary shaft seal (dynamic seal), the use of magnetic fluid as the fluid is magnetic characteristics, it can be adsorbed on the permanent magnet or electromagnet in the gap, the relative motion of the two objects to get sealed. O-ring to form a liquid, used in precision instruments, precision machinery, gas seals, vacuum seals, pressure seals, etc.; dynamic seal most widely used, can achieve zero leakage, with sealing liquid with less vibration, no mechanical wear, small friction , low power consumption, no aging, self-lubricating, long life, speed to a wide range, simple structure, right axis machining accuracy and finish less demanding, sealed and reliable. (2), the biomedical field: magnetic nano materials are widely used as a carrier of various anticancer drugs, to form a magnetic targeting delivery system; with magnetic nano materials of magnetic microspheres can be widely used in the magnetic immunization cell separation, magnetic resonance angiography imaging and so on. The use of magnetic nanomaterials in external alternating electromagnetic field characteristics that produce heat to kill cancer cells, to treat tumors. (3), magnetic health is well known that the human body has a bio-magnetic field, every cell of the human body is a magnetic micro unit, so the external magnetic field can influence the body's physiological function. According to reports shows that the magnetic field on the human body's nervous system, heart function, blood components, vascular system, blood lipids, blood rheology, immune function, endocrine function and have an impact on the activity of such action. Therefore, the human body has a disease treatment and health care. Based on this principle, we have invented a nano-magnetic powder, the powder to add this product to adjust the body functions and improve disease resistance, play a role in health care. Obtained good stability of water-based magnetic fluid, place a few months still dispersed. Therefore, the water-based magnetic fluid as a similar magnetic pigment easily added to a variety of products; can be widely used in all kinds of chemical fiber, plastics, rubber, etc., is health care products, health products, excellent add material. Currently on the market there are some nano-magnetic application products, such as nano-magnetic products, magnetic nanoparticles knee, nano-magnetic bracelets. (4) the use of nano Fe3O4 magnetic powder and deep black color, can be made magnetic recording materials, high gradient magnetic separator, microwave absorbing materials, special coatings and xerographic developer. Preparation method: the amount of Fe3O4 added to a dispersing agent (sodium oleate, and polyethylene glycol mixture) in 100mL of hot water, dispersed with an ultrasonic stirring, the reaction 1h, the obtained magnetic fluid. Added amount Example: 2.5g Fe3O4 were dispersed in 100mL water, were added different amounts of dispersing agent (sodium oleate, and polyethylene glycol mixture) (respectively, 0.25mL, 0.50mL, 0.75mL, 1.00mL, 1.25 mL), were placed in a strong magnetic field observed 320mT stratification found dispersant is 0.25mL and 0.50mL with scattered phenomenon, 0.75mL no longer stratification, then more little effect, but a waste of reagents. It is a general principle of dispersant amount of fine, to the amount of non-stratification case, unnecessary added more numerous. |
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Copyright © GuangDong ICP No. 10089450, Nanjing 埃普瑞纳米 Material Co., Ltd. All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
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You are the 6458 visitor
Copyright © GuangDong ICP No. 10089450, Nanjing 埃普瑞纳米 Material Co., Ltd. All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility