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Biopolymers and Bioplastics 2016
September 12-14, 2016
Volume 7, Issue 5(Suppl) J Bioremed Biodeg 2016
ISSN: 2155-6199 JBRBD, an open access journal
conferenceseries .com
September 12-14, 2016 San Antonio, USA
3rd International Conference and Exhibition onBiopolymers & Bioplastics
J Bioremed Biodeg 2016, 7:5(Suppl)
Balancing performance and sustainability in natural fiber-reinforced composites
Umeyr Kureemun1, Lee Heow Pueh1, Tran Le Quan Ngoc2 and Yucheng Zhong1
1National University of Singapore, Singapore
2Singapore Institute of Manufacturing Technology, Singapore
Natural and synthetic fibers have been used increasingly as matrix reinforcements in various applications. While the latter is
popular for its generally superior mechanical properties, natural fibers are environmental friendly and sustainable. As more
businesses are inclined towards going green, natural fibers are gaining increasing attention in recent years, often as a substitute
or as a complementary to glass fibers. However, its utilization is usually bound to applications in not requiring high mechanical
performance. In this study, we investigate an extended use of natural fibers in polymeric composites to structural applications
requiring highermechanical performance, through hybridizationwith carbon fibers, aiming at a good balance between performance
and sustainability. Having more than one fiber type in a polymer matrix gives greater flexibility in achieving optimal characteristics
with a proper understanding of the material behavior and failure mechanics. Experimental investigation was carried out on various
flax-carbon reinforced polymer hybrid systems fabricated using a custom-designed composites prepreg extrusion plant, suitable
for large-scale industrial output, to impregnate fibers with a recyclable polymer, which are then hot-pressed, producing composite
laminates with high fiber volume fraction. The reinforcing effect of carbon in flax-polypropylene composite at various carbon fibre
loadings is determined with regards to the hybrid’s strength and stiffness under tension and bending.
Reticulationmechanismof advanceddiacrylate cis-1,4-polyisoprenewith temperature:In situ investigations
on thin films by infrared and Raman spectroscopies
Kenza Ayche, Jean François Bardeau, Jean François Pilard and Nicolas Delorme
Institut des Molécules et Matériaux du Mans, France
The increasing number of mobile devices and the race to energy sobriety make the decrease of the size of microelectronic
systems (MEMS) a major challenge. Today, lithium micro batteries are currently the best solution for high-power and
energy applications. Incorporate them into credit cards containing a screen or associate them to electronic sensors for the
supervision is the challenge which raises international companies such as STMicro Electronics. However, these micro batteries
contain some lithium metal which can be dangerous if the metallic lithium is in contact with water or humid air. In addition,
the substance can spontaneously ignite in the contact of the humidity. So, in order to avoid the problems of safety, we absolutely
have to protect the lithium contained in our micro batteries using an encapsulation layer. Polymeric encapsulation has the
advantage, compared with other materials (ceramic, metal), to present a moderate cost of shaping and a low weight. However,
such systems of encapsulation are insufficient to guarantee a satisfactory life cycle of components. Indeed, in the presence
of humidity or important temperature variation, the mechanical assemblies can be weakened and engender an irreparable
break. Our project is thus to develop thin encapsulation layers of polymers based on natural rubber. The interesting physical
and chemical properties of such polymers represent an attractive alternative to existing packaging materials. Moreover, in
addition to their barrier properties against water and air, these polymers are known to be ecological, very flexible and have a
good elasticity. Diacrylate oligoisoprene derived of natural rubber is associated with a thermal initiator known for its capacity
to crosslink a large range of polymers. The process consists of forming a thin film by dip coating a substrate into a polymer/
di-sulfonyl azide mixture and then thermally anneal the film up to a temperature at which the sulfonyl azide decompose.
The effects of both the selected annealing temperature, the heating rate and the reaction time were investigated using Fourier
transform infrared spectroscopy and Raman spectroscopy. A full analysis of the vibrational spectra provides significant
information regarding the thermal reticulation. Our investigations allowed us to determine both the kinetics of thermal cross
linking and the main parameters that can help to develop industrial thermal process. This project is realized in collaboration
with ST Micro Electronics and applications in micro batteries will be discussed.