Abstract
Iron oxide magnetic nanoparticles (MNPs) with average diameter 11.7 nm synthesized by laser target evaporation were used for the synthesis of composites and ferrogels based on polyacrylamide network. The chemical composition of MNPs corresponded to maghemite. It was shown that intact MNPs strongly interacted with polyacrylamide polymeric network, while the adsorption of electrostatic stabilizer on the surface of MNPs efficiently prevents such interaction. Synthesis of ferrogels was performed by the radical polymerization of acrylamide in electrostatically stabilized suspensions of MNPs in water. It was shown that the molecular structure, water uptake, and compression modulus can be controlled by the concentration of monomer taken in the synthesis.
Highlights
Novel advanced polymeric composites with embedded magnetic particles attract special attention due to their prospective applications in biomedical applications, which include magnetic sensors, actuators, and systems for the controlled drug delivery [1,2,3]
One of the methods of MNPs synthesis providing a high production rate is the physical method of the laser target evaporation (LTE) [6,7,8,9]: it provides 10 to 50 nm spherical MNPs at ca. 100 g per hour production rate
Iron oxide magnetic nanoparticles (FeOx MNPs) synthesized by laser target evaporation can be succefully embedded in composites and ferrogels based on polyacrylamide (PAAm)
Summary
Novel advanced polymeric composites with embedded magnetic particles attract special attention due to their prospective applications in biomedical applications, which include magnetic sensors, actuators, and systems for the controlled drug delivery [1,2,3]. Such materials are based on the matrix of a biocompatible polymer with magnetic particles, which are embedded into it. Considering the practical application in biomedicine and bioengineering it is important to ensure well controlled shape of iron oxide particles and a large single batch of their production. One of the methods of MNPs synthesis providing a high production rate is the physical method of the laser target evaporation (LTE) [6,7,8,9]: it provides 10 to 50 nm spherical MNPs at ca. 100 g per hour production rate
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