Jump to main content
Jump to site search


A pure magnetite hydrogel: synthesis, properties and possible applications

Author affiliations

Abstract

A magnetite-only hydrogel was prepared for the first time by weak base mediated gelation of stable magnetite hydrosols at room temperature. The hydrogel consists of 10 nm magnetite nanoparticles linked by interparticle Fe–O–Fe bonds and has the appearance of a dark-brown viscous thixotropic material. The water content in the hydrogel could be up to 93.6% by mass while volume fraction reaches 99%. The material shows excellent biocompatibility and minor cytotoxic effects at concentrations up to 207 μg mL−1. The gel shows excellent sorption capacity for heavy metal adsorption such as chrome and lead ions, which is 225% more than the adsorption capacity of magnetite nanoparticles. Due to thixotropic nature, the gel demonstrates mechanical stimuli-responsive release behavior with up to 98% release triggered by ultrasound irradiation. The material shows superparamagnetic behavior with a coercivity of 65 emu g−1 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.

Graphical abstract: A pure magnetite hydrogel: synthesis, properties and possible applications

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Aug 2017, accepted on 27 Oct 2017 and first published on 30 Oct 2017


Article type: Paper
DOI: 10.1039/C7SM01702B
Citation: Soft Matter, 2017, Advance Article
  •   Request permissions

    A pure magnetite hydrogel: synthesis, properties and possible applications

    E. I. Anastasova, V. Ivanovski, A. F. Fakhardo, A. I. Lepeshkin, S. Omar, A. S. Drozdov and V. V. Vinogradov, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM01702B

Search articles by author

Spotlight

Advertisements