Optical, magnetic and dielectric properties of non-liquid crystalline elastomers doped with magnetic colloids

A. M. Figueiredo Neto, M. H. Godinho, T. Toth-Katona, P. Palffy-Muhoray

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Magnetic nanoparticles from magnetic colloidal suspensions were incorporated in the urethane/urea elastomer (PU/PBDO) by swelling fully crosslinked elastomer samples with a toluene and ferrofluid mixture. It is shown that ferrofluid grains can be efficiently incorporated into the matrix of elastomers. The dependence of the birefringence of both the pure and ferrofluid-doped elastomer samples on strain is linear. The ratio of birefringence to strain of the ferrofluid-doped samples is greater than that of the pure elastomer samples, indicating that ferrofluid grains are oriented by the strained polymer network. We propose that this strain-induced orientation is due to the shape anisotropy of the nanoparticles.

Original languageEnglish
Pages (from-to)184-189
Number of pages6
JournalBrazilian Journal Of Physics
Volume35
Issue number1
DOIs
Publication statusPublished - 1 Mar 2005

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