Next Article in Journal
ZnO Films Incorporation Study on Macroporous Silicon Structure
Previous Article in Journal
Impact of Microfluidization on the Emulsifying Properties of Zein-Based Emulsions: Influence of Diutan Gum Concentration
 
 
Article

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

1
National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
2
Faculty of Physics, University of Bucharest, Atomistilor 405, 077125 Magurele, Romania
3
Department of Electrical Measurements and Materials, Faculty of Electrical Engineering, Technical University Gh. Asachi Iasi, Boulevard Profesor Dimitrie Mangeron 67, 70050 Iasi, Romania
4
All Green SRL, 8 G. Cosbuc Street, 700470 Iasi, Romania
*
Author to whom correspondence should be addressed.
Academic Editors: Dario Pasini and Jānis Andersons
Materials 2021, 14(13), 3696; https://doi.org/10.3390/ma14133696
Received: 28 May 2021 / Revised: 22 June 2021 / Accepted: 28 June 2021 / Published: 1 July 2021
Composites of magnetite (Fe3O4) nanoparticles dispersed in a polydimethylsiloxane (PDMS) matrix were prepared by a molding process. Two types of samples were obtained by free polymerization with randomly dispersed particles and by polymerization in an applied magnetic field. The magnetite nanoparticles were obtained from magnetic micrograins of acicular goethite (α-FeOOH) and spherical hematite (α-Fe2O3), as demonstrated by XRD measurements. The evaluation of morphological and compositional properties of the PDMS:Fe3O4 composites, performed by SEM and EDX, showed that the magnetic particles were uniformly distributed in the polymer matrix. Addition of magnetic dispersions promotes an increase of thermal conductivity compared with pristine PDMS, while further orienting the powders in a magnetic field during the polymerization process induces a decrease of the thermal conductivity compared with the un-oriented samples. The shape of the magnetic dispersions is an important factor, acicular dispersions providing a higher value for thermal conductivity compared with classic commercial powders with almost spherical shapes. View Full-Text
Keywords: PDMS; magnetite; magnetic field polymerizations; thermal conductivity properties PDMS; magnetite; magnetic field polymerizations; thermal conductivity properties
Show Figures

Figure 1

MDPI and ACS Style

Stancu, V.; Galatanu, A.; Enculescu, M.; Onea, M.; Popescu, B.; Palade, P.; Aradoaie, M.; Ciobanu, R.; Pintilie, L. Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites. Materials 2021, 14, 3696. https://doi.org/10.3390/ma14133696

AMA Style

Stancu V, Galatanu A, Enculescu M, Onea M, Popescu B, Palade P, Aradoaie M, Ciobanu R, Pintilie L. Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites. Materials. 2021; 14(13):3696. https://doi.org/10.3390/ma14133696

Chicago/Turabian Style

Stancu, V., A. Galatanu, M. Enculescu, M. Onea, B. Popescu, P. Palade, M. Aradoaie, R. Ciobanu, and L. Pintilie. 2021. "Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites" Materials 14, no. 13: 3696. https://doi.org/10.3390/ma14133696

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop