Third Day Poster Session, 17 June 2010 - NanoTR-VI

Poster Session, Thursday, June 17
Theme F686 - N1123
Synthesis And Properties Of Clay-Cellulose-Polyester Nano-Hybrid materials
Erkan Bahçe 1 , Süleyman Köytepe 2 and Turgay Seçkin 2 *
1 Department of Mechanical Engineering, University of Inonu, Malatya, TR Türkiye 44280
2 Department of Chemistry, University of Inonu, Malatya, TR Türkiye 44280
Abstract-Polyester in which cellulose and clay reinforced particles are uniformly distributed are prepared. Novel hybrid polyester/cellulose/clay
composites are structurally elucidated by means of FTIR, SEM, XRD and thermal analytical techniques. The selected polymer for the
composites preparation was commercial polyester. The composites were prepared using a mixer. The polyester, cellulose and the various
proportions of clay were mixed at 90 ºC during selected time considered adequate for a homogeneous mixture. The extracted composites were
then dried using the vacuum oven for 24 hours.
Recent advances in polymer–clay nanocomposites due to the
pioneering work of researchers at Toyota on nylon-6/clay
nanocomposites have demonstrated an improvement in both
physical and mechanical properties [1]. Because of the
nanoscale structure, polymer–clay nanocomposites possess
unique properties which include an improvement in
mechanical (modulus, strength, toughness), thermal (thermal
stability, decomposition, flammability, coefficient of thermal
expansion), and physical (permeability, optical, dielectric,
shrinkage) properties [2]. Nanocomposites have been
demonstrated with many polymers of different polarities
including polystyrene, polycaprolactone, poly(ethylene oxide),
poly(butylene terephthalate), polymethylmethacrylate,
polyamide, polyimide, polyester, polyether, epoxy,
polysiloxane, and polyurethane. Similarly, cellulose and other
natural fibres are increasingly being used as reinforcements
for enhancing the strength and fracture resistance of polymeric
matrices because of their low density, low cost, renewability
and recyclability as well as excellent mechanical
characteristics that include flexibility, high specific strength
and high specific modulus [3]. These unique properties are
particularly desirable in applications as composite materials
for automobiles, armour, sports, and marine industries.
Natural fibers can be produced in many types of reinforcement
composites, such as continuous and discontinuous
unidirectional fibers, random orientation of fibers, etc. By
taking the advantages from those types of reinforced
composites such as produced good properties and reduced the
fabrication cost, they had been used in the development of
automotive, packaging and building materials. They can be
spun into filaments, thread or rope. They can be used as a
component of composite materials.
Natural fibers are now emerging as viable alternatives to
glass fibers either alone or combined in composite materials
for various applications. The advantages of natural fibers over
synthetic or man-made fibers such as glass are their relatively
high stiffness, a desirable property in composites, low density,
recyclable, biodegradable, renewable raw materials, and their
relatively low cost. Besides, natural fibers are expected to give
less health problems for the people producing the composites.
Natural fibers do not cause skin irritations and they are not
suspected of causing lung cancer [4]. The disadvantages are
their relatively high moisture sensitivity and their relatively
high variability of diameter and length. The abundance of
natural fibers combined with the ease of their processability is
an attractive feature, which makes it a covetable substitute for
synthetic fibers that are potentially toxic [5].
Figure 1. The sutructure of the cellulose (reference should be defined
as the square paratheses) [6].
Paint on ships, bridges, military vehicles and airplanes must
be removed from the surfaces in order to allow detail surface
in sections, to perform other works and repair operations, and
to keep the weight down to acceptable levels. In the past,
chemical have been used for removing paints. Due to the
development of tougher paint systems to meet the increasing
demands of the industry, more aggressive chemical paint
strippers have been developed. These aggressive paint
strippers are very efficient in doing the job, but they are
hazardous and toxic to the environment and generate large
amounts of hazardous waste. The present invention is a
method of stripping paint from the painted surface comprising
the step of cleaning the painted surface with a media
(polyester) comprising hard shell pit particles sized between
12 mesh and 50 mesh.
In this study, the selected polymer for the composites
preparation was commercial polyester, the composites were
prepared using a mixer. The polyester, cellulose and the
various proportions of clay were mixed at 90 ºC during
selected time considered adequate for a homogeneous mixture.
The extracted composites were then dried using the vacuum
oven for 24 hours.
It is an advantage of the present invention that the paint
stripping method generates less toxic waste than most prior art
methods. It is another advantage of the present invention that
the method is both effective and efficient. Other advantages,
features, and objects of the present invention will become
apparent after one of skill in the art has reviewed the
specification and claims.
*Corresponding author: 0Htseckin@inonu.edu.tr
[1] L. An, , H.M.Chan, , N.P. Padture, B.R. Lawn, J. Mater. Res. 11,
204 (1996)
[2] A.K. Bledzki, J. Gassan, Prog. Polym. Sci., 24, 221 (1999)
[3] X. Fu, S. Qutubuddin, Mater. Lett. 42, 12 (2000)
[4] I. Isik, U. Yilmazer, G. Bayram, Polymer, 44, 6371 (2003)
[5] B.Z. Jang, Y.K. Lieu, J. Appl. Polym. Sci. 30, 3925 (1985)
[6] R. Young, Cellulose structure modification and hydrolysis. New
York: Wiley (1986).
6th Nanoscience and Nanotechnology Conference, zmir, 2010 731