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November 13-14, 2017 Paris, France
5th International Conference on
PLASMA CHEMISTRY AND
PLASMA PROCESSING
Journal of Biotechnology and Phytochemistry
Volume 1, Issue 2 Plasma Chemistry 2017
Dielectric barrier discharge plasma surface
modification of polymers
Lalita Ledwani1, Hemen Dave2 and S K Nema3
1Manipal University, India
2MSU Baroda, India
3FCIPT - Institute for Plasma Research, India
With increase of industrialization, demand for all polymeric
materials for various applications in fastest growing field.
At a time increase in environmental concern needs to develop
environmental friendly processing of these polymers. Non-
thermal plasma is an emerging eco-technology for surface
modification which can advantageously improve dyeing of
various natural and synthetic materials. Dielectric barrier
discharge (DBD) plasma treatment of polymers has attracted
great interest due to low cost, high processing speed, reduced
environmental impacts and simple system of operation. The
advantage of DBD over other discharges lies in having the option
to work with non-thermal plasma at atmospheric pressure and a
comparatively straightforward scale-up to large dimensions. In
the present study, two different types of polymers: Polyester and
leather polymers were exposed to dielectric barrier discharge at
atmospheric pressure in oxygen and air plasma. DBD plasma
treatment changes surfacemorphologyandchemical composition
of polyester and leather polymers. Surface analysis was carried
out using with various characterization techniques such as ATR-
FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS),
Scanning electron microscopy (SEM) for both the polymers. We
observed significant improvement in hydrophilic properties after
oxygen and air plasma treatment. Apparent decrease in contact
angle in plasma treated polymers is attributed to functional
group formation and roughness which is created by DBD plasma
treatment. Aging effect on plasma treated polymer surfaces was
also studied. Dyeing of untreated and plasma treated polyester
textile has been carried out using six natural dyes by alcohol
assisted dyeing method at room temperature. Spectroscopic
measurement and fastness analysis have shown significant
increase in colour intensity and dye uptake properties on plasma
treated samples. This study divulges that DBD plasma treatment
is dry and eco-friendly technique to modify the polymer surface
to improve dye uptake properties with natural dyes at room
temperature.
Biography
Lalita Ledwani is a professor in the department of chemistry at Manipal
University Jaipur; served as head of chemistry department from year 2011-
2014, and she is the controller of examinations in the same University. She
has been extensively working in plasma surface modification of polymers and
natural products research areas. She has received external research grant from
different funding agencies namely KWEF, Japan, DST, Govt of India, DST, Govt
of Rajasthan and UGC, Govt of India. On her credit, she has more than twenty
research papers published in peer reviewed international and national journals,
she also delivered several invited/expert lectures besides more than forty
research papers in international and national conferences. She has supervised
three PhD theses and three PG dissertations and four UG dissertations. At
present, six research scholars and one post doc fellow are working under
her supervision. She has also organized various national and international
academic events as a convener/coordinator.
Lalita Ledwani et al., J Biot Phyt 2017