Loading…

Magnetic hyperthermia studies in magnetite ferrofluids based on bio-friendly oils extracted from Calophyllum inophyllum, Brassica juncea, Ricinus communis and Madhuca longifolia

•High magnetic heating efficiency for bio-friendly oil-based ferrofluids.•Increased Brownian relaxation time with medium viscosity lowers heating efficiency.•Heating efficiency increases by ~ 11 times on ~ 88% reduction in medium viscosity.•Highest heating efficiency for punnaga oil-based ferrofluid...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2021-11, Vol.537, p.168134, Article 168134
Main Authors: Gopika, M.S., Lahiri, B.B., Anju, B., Philip, John, Savitha Pillai, S.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•High magnetic heating efficiency for bio-friendly oil-based ferrofluids.•Increased Brownian relaxation time with medium viscosity lowers heating efficiency.•Heating efficiency increases by ~ 11 times on ~ 88% reduction in medium viscosity.•Highest heating efficiency for punnaga oil-based ferrofluid.•Dynamic hysteresis loop simulations agree with the experimental data. We study the magnetic hyperthermia efficiency of magnetite ferrofluids based on bio-friendly oils extracted from Calophyllum inophyllum (punnaga), Brassica juncea (mustard), Ricinus communis (castor) and Madhuca longifolia (iluppai) seeds. Reported medicinal uses of these bio-friendly oils make them interesting candidates for hyperthermia from a perspective of topical skin applications. Magneto-caloric experiments are performed at a fixed frequency of 126 kHz and varying field amplitudes of 33.1–25.7 kA/m. Experimental findings show that field induced heating efficiency is the highest for the punnaga oil based ferrofluids (~170.0 ± 8.2 W/gFe) and the estimated intrinsic loss power of ~ 1.26 nHm2kg−1 is found to be comparable to several commercially available ferrofluids. The obtained results further indicate that field induced heating efficiency increased by ~ 11 times on ~ 88% reduction in medium viscosity, which is due to the reduction in Brownian relaxation time of the dispersed magnetite nanoparticles at lower medium viscosity. Dynamic hysteresis loop simulations are carried out to theoretically estimate the heating efficiencies and the experimental and theoretical data are found to exhibit similar trends. The obtained results are beneficial for optimal design of bio-friendly oil based ferrofluids for possible topical hyperthermia applications over skin surfaces.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2021.168134