Principal investigator: Professor Yachin Cohen, Department of Chemical Engineering
Researchers: Dr. Lev Vaikhanski, Ms. Oksana Ostrovki

Our research focuses on the relation between processing, structure, properties and function of
polymeric systems. These include: dissolution and processing of carbon nanotubes and graphene
for fabrication of fibers, nanofibers, foams and nano-composites in polymer matrices. Utilization
of natural cellulose as sustainable raw material for gels, encapsulating emulsions, and biofuel.
The main experimental tools used for nano-structure characterization are scattering of x-rays and
neutrons, and transmission and electron microscopy. The research group includes, in addition to
the PI, 3 senior (Ph.D) researchers, and 6 graduate students.
Selected publications:
N. Behabtu, et al., “Strong, light, multi-functional fibers of carbon nanotubes with ultrahigh
conductivity", Science 339, 182-186 (2013)
O. Kleinerman, et al., "Cryogenic-temperature electron microscopy direct imaging of carbon
nanotubes and graphene solutions in superacids", J. Microsocpy 259, 16-25 (2015).
L. Hossain, et al., “Structure and Swelling of Cross-linked Nanocellulose Foams”, J. Colloid &
Interface Sci. 568, 234-244 (2020)
The objective of our project in the framework of the GRAPHENE Consortium is to utilize
develop and fabricate graphene-based nano-composites in epoxy-resin matrix as a basis for
laminates and pre-preg materials use in production of printed circuit boards with enhanced
ability for heat conductivity. In particular, we employ microspheres coated by graphene as a
filler material in order to maintain a three-dimensional orientation of the graphene plates, to
achieve heat conduction away from the surface source, in all dimensions. For enhanced dielectric
properties, hollow microspheres are used.