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conferenceseries.com
RRJOMS | Volume 5 | Issue 4 | July, 2017
July 27-29, 2017 Vancouver, Canada
10th International Conference on
Emerging Materials and Nanotechnology
Res. Rev. J Mat. Sci. 2017
DOI: 10.4172/2321-6212-C1-003
Effect of nano-clay mineral addition on tribological properties on jute/epoxy composite by using design
of experiments approach
Heruthunnisa Shaik1 and B Chandra Mohan Reddy2
1Malla Reddy Engineering College, India
2Jawaharlal Nehru Technological University, Anantapur, India
Polymer nano-composites have received immense attention in the recent years, as many of these materials present promising
properties like high flexural strength, improved pressure barrier properties and depleting flammability. Polycarbonate is
one of the most interesting ones, due to characteristic properties like high toughness and strength, excellent ballistic strength
and good visual clarity. It could be expected that the addition of relatively low percentages of nano-reinforcements will result
into remarkable improvements in mechanical and thermal properties. In this work, (Cloisite 25A) nano clay, Araldite LY
556 epoxy, HY 951 hardener were used to prepare the matrix at various blends 0%, 4%, 8%, and 10% by using hand lay-
up method. And further detailed analysis was performed to study the tribological property of various percentage nano-clay
(Cloisite 25A) loaded epoxies, with inclusion of jute fiber using Taguchi’s technique. For this purpose, the test samples were
prepared according to the ASTM: G99 standard, and the test was carried out with the assistance of Pin-on- Disc machine. For
this experimentation L16 orthogonal array was used to evaluate the tribological property with four control variables such as %
of nano-clay content, normal load, sliding velocity and sliding distance at each level on friction co-efficient along with wear
rate. From the obtained results the combination of factors greatly influenced the process to achieve the minimum wear and
coefficient of friction for jute fiber reinforced laminates were analyzed. The microstructure behavior of the fabricated samples
were investigated with assistance of Scanning Electron Microscope (SEM), particle distribution was analyzed throughout the
matrix by Transmission Electron Microscopy (TEM) analysis before and after the wear test. ANOVA analysis revealed the nano
clay contribution on coefficient of friction and wear of the jute fiber laminate composites.
Solvent-induced effects in polymer-wrapped s-SWNTs based fully printed field-effect transistors
Isis Maqueira Albo and Giorgio Dell’ Erba
Istituto Italiano di Tecnologia, Italy
Despite the emergency of competing materials carbon nanotubes remain at the fore-front of the promising materials for
organic electronics like field-effect transistors. Due to their properties, are among the most suitable structure to support
the current advancements goals in flexible electronics. However, very few are the ways to make stable single walled carbon
nanotubes (SWNT) dispersions for simple processing. To further push the adoption of this kind of devices in everyday life
applications, high-throughput dispersion and fabrication methods must be adopted. In this work, we highlight how a simple
process for chirality selection and dispersion of semiconducting SWNT may be used for the realization of all-printed Field
Effect Transistors. Chirality selection is operated by polymer-wrapping of the s-SWNTs with poly [(9, 9-dioctylfluorenyl-2,7-
diyl)-alt-co-(6,6’-{2,2’-bipyridine})] in common organic solvents, with a process optimized for the [6,5] chirality selection.
After solution purification, wrapped nanotubes can be dispersed in those solvents suitable for printing. The printing process
was performed in ambient air and at room temperature, and the SWNT ink was dispense using a nozzle with an orifice
diameter of 60μm over pre-patterned source and drain electrodes. The devices exhibit ambipolarity, with a slight prevalence of
the n-type behavior. For both electron and hole accumulations, at VDS = ± 5V (linear regime) 106 on-off ratios can be observed,
with mobilities (μlin) around 0,3 cm2V-1s-1 for both carrier types. In saturation regime (VDS = ± 60 V) mobility values (μsat) up
to 0.8 cm2V-1s-1 for electrons and 0.65 cm2V-1s-1 for holes are reached. The study also highlights the effects of different solvents
on the carbon nanotube network formation and transistor performances with best results with those solvents that tend to form
polymer pre-aggregates in the printed solution.