(26c) Development of Magnetic Field-Responsive Surfactants | AIChE

(26c) Development of Magnetic Field-Responsive Surfactants


Bishop, K. J. M., Penn State University
Misra, R., The Pennsylvania State University
Schiffer, P., The Pennsylvania State University

of magnetic field-responsive surfactants

Sun Hae Ra Shin1,
Rajiv Misra2, Peter Schiffer2, Kyle Bishop1*

1Department of Chemical
Engineering, The Pennsylvania State University, University Park, PA 16802

2 Department of Physics, The
Pennsylvania State University, University Park, PA 16802

correspondence to kjmbishop@engr.psu.edu

This talk presents the
development of magnetic field-responsive surfactants that can be used for
dynamic and continuous tuning of interfacial properties. The magnetic
surfactants consist of inorganic nanoparticles with amphiphilic surfaces. Particles
of magnetic materials such as cobalt ferrite exhibit large magnetic moments and
can be oriented and positioned by externally applied fields. The preparation of
amphiphilic surface is readily achieved by spontaneous self-organization of a
mixed monolayer of hydrophobic and hydrophilic ligands on the particle surface.
Strong coupling between the particles' internal magnetic moments and their
asymmetric surface chemistry allows external magnetic fields to directly
influence the properties of the interface through the competition of magnetic
and surface forces. The field-induced response of liquid interfaces containing
these responsive surfactants is investigated with pendant drop tensiometry.

See more of this Session: Functional Nanoparticles and Nanocoatings on Particles I

See more of this Group/Topical: Particle Technology Forum