A pure magnetite hydrogel: synthesis, properties and possible applications
Чистый гидрогель магнетита: синтез, свойства и возможные применения
2017-01-01
SCID: 54.1/xh4s9xyk
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10 nm magnetite nanoparticlesbiocompatibilitycoercivity 65 emu g^-1 at 6000 Oeenhanced heavy metal adsorption (Cr, Pb)high volume fraction (99%)high water content (93.6% by mass)interparticle Fe-O-Fe bondslow cytotoxicity (≤207 μg mL^-1)magnetic drug deliverymagnetite aerogelsmagnetite hydrosolsmechanical stimuli-responsive releasepure magnetite hydrogelsorbents for hydrometallurgysuperparamagnetic behaviorthixotropic behaviorultrasound-triggered release (up to 98%)weak base mediated gelation
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Abstract (AI)
at 6000 Oe. The magnetite gels prepared could be used for the production of magnetite aerogels, magnetic drug delivery systems with controlled release and highly efficient sorbents for hydrometallurgy.
Key Findings
1
A magnetite-only hydrogel was synthesized for the first time by weak base mediated gelation of stable magnetite hydrosols at room temperature.
2
Potential applications include production of magnetite aerogels, magnetic drug delivery systems with controlled release, and highly efficient sorbents for hydrometallurgy.
3
The gel’s heavy metal adsorption capacity (for chromium and lead ions) is 225% higher than that of magnetite nanoparticles.
4
The hydrogel can contain up to 93.6% water by mass and reach a volume fraction of 99%.
5
The hydrogel is composed of ~10 nm magnetite nanoparticles linked by interparticle Fe-O-Fe bonds, forming a dark-brown thixotropic material.
6
The material is superparamagnetic with a coercivity of 65 emu g^-1 measured at 6000 Oe.
7
The material shows excellent biocompatibility with minor cytotoxic effects at concentrations up to 207 μg mL^-1.
8
The thixotropic gel exhibits mechanical stimuli-responsive release, achieving up to 98% release when triggered by ultrasound irradiation.
Research Object
Pure magnetite hydrogel composed of ~10 nm magnetite nanoparticles linked by interparticle Fe–O–Fe bonds
Research Subject
Synthesis, physicochemical properties (water content, thixotropy, sorption capacity, superparamagnetism, coercivity), biocompatibility/cytotoxicity, ultrasound-triggered release behavior, and potential applications (aerogels, magnetic drug delivery, sorbents)
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2017-01-01
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