Heating of polyacrylamide ferrogel by alternating magnetic field / Safronov A. P.,Samatov O. M.,Tyukova I. S.,Mikhnevich E. A.,Beketov I. V. // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 2016. - V. 415, l. . - P. 24-29.

ISSN/EISSN:

0304-8853 / 1873-4766

Type:

Article; Proceedings Paper

Abstract:

Ferrogel based on polacryamide network with embedded maghemite nanoparticles with mean number average particle diameter 12 nm was synthesized by radical polymerization in water-based ferrofluid. The network structure of ferrogel was characterized by Flory-Rehner theory and it was shown that the embedded particles were substantially larger than the mesh size. It prevented the translational movement of particles in the ferrogel. The immobilization of particles was confirmed by dynamic light scattering. The adhesion of macromolecular chains to the particles was determined by calorimetry using thermochemical cycle. The enthalpy of interfacial adhesion was found several orders of magnitude higher than the energy of dipoles in typically applied magnetic fields. Despite the differenve in the mobility of particles in ferrofluid and ferrogel the comparative study of their heating in alternating magnetic field, however, revealed their close similarity. In both cases it was goverened by superposing of Neel and Brownian relaxation mechanisms. (C) 2016 Elsevier B.V. All rights reserved.

Author keywords:

Iron oxide; Nanoparticles; Ferrogel; Magneto-induced heating IRON-OXIDE NANOPOWDERS; PARTICLE HYPERTHERMIA; NANOPARTICLES; LOSSES; FLUIDS

DOI:

10.1016/j.jmmm.2015.11.024

Web of Science ID:

ISI:000377391300006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	OCT 1
Note	International Baltic Conference on Magnetism - Focus on Biomedical Aspects (IBCM), Svetlogorsk, RUSSIA, AUG 30-SEP 03, 2015
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-4766
Keywords-Plus	IRON-OXIDE NANOPOWDERS; PARTICLE HYPERTHERMIA; NANOPARTICLES; LOSSES; FLUIDS
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email	Safronov@iep.uran.ru
Number-of-Cited-References	24
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	22
Journal-ISO	J. Magn. Magn. Mater.
Doc-Delivery-Number	DN9HY