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Page 79
Volume 4
December 10-12, 2018
Rome, Italy
Nano Research & Applications
ISSN: 2471-9838
Advanced Materials 2018
Nano Engineering 2018
JOINT EVENT
22
nd
International Conference on
Advanced Materials
and Simulation
&
22
nd
Edition of International Conference on
Nano Engineering &
Technology
S
elf-healing materials have intensively been investigated over
the past 15 years. Several approaches have been developed
resulting in materials capable of dealing with damage events in a
more or less independent way, thereby extending their service life
and thus reducing waste. Large interest has been drawn to self-
healingelastomericmaterials, followingeither extrinsicor intrinsic
approaches. However, limited attention has been paid to the self-
healing of vulcanized rubbers. Healing is especially challenging
in vulcanized rubbers, where the confinements imposed by the
high density of cross-links restrict polymer chains to diffuse and
form new bonds across former (pre-) fractured surfaces. We
will discuss the development of rubber compounds with self-
healing properties. While it is relatively easy to demonstrate the
occurrence of self-healing (i.e., the restoration of mechanical
properties) the underlying physico-chemical reactions which
take place at molecular level during the healing process are
less easy to be monitored. Thus, a systematic research on the
molecular dynamics of these elastomers will help to elucidate
the key healing reactions and how the relaxation behavior of the
compounds can be affected by the degree of curing. In addition,
themajorityof studiescovering thehealingof polymer composites
report on the healing of structural properties and on the use of
reinforcing agents (e.g., nanofillers) for improving the mechanical
performance. However, nanofillers can also be used for restoring
other functionalities, i.e., non-mechanical properties such as
thermal conduction, electrical conduction and magnetic shielding
among others. Our aim is to restore more than one functionality
after healing macroscopic damage in rubber nanocomposites.
This study also focuses on the development of rubber composites
that can combine together self-healing properties with the use
of ground tire rubber (GTR) as alternative sustainable filler. The
self-healing efficiency of GTR filled rubber composites will be
compared to conventional carbon black filled compounds. These
results will be seen as a starting model material for developing
new sustainable applications economically and environmentally
convenient with good mechanical properties as well as healing
ability.
marherna@ictp.csic.esMarianella Hernández Santana, Javier Araujo, Raquel Verdejo
and
Miguel Ángel
López Manchado
Institute of Polymer Science and Technology-CSIC, Spain
Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C7-028
Rubber composites with self-healing ability