INVESTIGADORES
FRONTINI patricia Maria
artículos
Título:
Effect of Topology on the Adhesive Forces Between Electrospun Polymer Fibers Using a T-peel Test
Autor/es:
FLORENCIA MONTINI BALLARIN,; TODD A. BLACKLEDGE; NICOLE L. CAPITOS DAVIS; PATRICIA M. FRONTINI; GUSTAVO A. ABRAHAM,
Revista:
POLYMER ENGINEERING AND SCIENCE
Editorial:
JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 2013 vol. 53 p. 2219 - 2227
ISSN:
0032-3888
Resumen:
Volume 53, Issue 10, pages 2219?2227, October 2013.
Electrospinning provides an effective methodology to
obtain high aspect ratio polymer fibers for biomimetic
applications. In this article, we evaluate the effect of topology
on adhesion between aligned fibers. Polycaprolactone
is electrospun using two different setups: (i) a tip collector
and (ii) a flat collector. The tip collector enables the
fibers to self-align. When a fiber reaches the tip collector,
the next fiber is repelled by the charge they carry, forcing
the fibers to deposit in a parallel arrangement. The flat
collector allows the fibers to deposit at random. The adhesion
between the fiber mats is measured using a T-peel
test. Adhesion strength (758.7 6 211.7 kPa) changes marginally
with the peeling rate and applied pressure on the
membranes. Aligned fibers exhibit higher adhesion
strength between the membranes in comparison to randomly
oriented nonwovens (613.1 6 79.9 kPa). The estimated
Johnson?Kendall?Roberts contact energy (83.1 6
32.5 mJ/m2) is consistent with the range of van der Waals
adhesion forces. This work shows how the adhesion
between two polymer membranes can be modulated by
surface topology, based on a T-peel testing setup.