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Materials Congress 2018
Page 54
Nano Research & Applications
ISSN: 2471-9838
W o r l d C o n g r e s s o n
Materials Science & Engineering
A u g u s t 2 3 - 2 5 , 2 0 1 8
Am s t e r d a m , N e t h e r l a n d s
Piezoelectric and triboelectric energy harvesting devices have been
developed in the past few years to convert mechanical energy into electrical
energy as renewable energy. Piezoelectric nanogenerator is a converting
energy source, by changing structural polarity of material when it is applied
with stress. On the other hand, triboelectric nanogenerator is a method of
generating electricity because two different materials created the electrostatic
charges on their surface when they are brought into physical contact, and the
electricity is built up due to a potential difference when they are separated. In
this work, a piezo-triboelectric nanogenerator (PTENG) has been developed for
harvesting energy from raindrops. The compositions are polydimethylsiloxane
(PDMS) as piezo-triboelectric surface and silver paint or an aluminium tape
as electrode. In addition, the surface of PDMS films are modified into a flat
surface with 3 patterns, including like a lotus-leaf, micro-pillar, and like shark-
skin. Polyvinyl alcohol (PVA) is used to replicate this pattern to make negative
moulds, which act as templates for fabricating PDMS films. The PDMS films
are fabricated by a spin-coating machine. Furthermore, the depth profile of
PVA negative mould is measured by atomic force microscope (AFM). The AFM
topologies reveal that the lower molecular weight and concentration is higher
efficiency for replicating structures. Hydrophobic property of PDMS films are
observed by the contact angle tester machine. The results show that micro-
pillars pattern give the highest value of contact angle as meaning the most
hydrophobic but it is not dramatically different from others. Field scanning
electron microscope (FE-SEM) is used to examine the size and shape of PDMS
surface structure. Finally, the electrical output of PTENG is measured using
a programmable electrometer, a digital oscilloscope and a low-noise current
preamplifer.
Biography
Atissun Kittilaksanon has completed his Bachelor’s degree
from King Mongkut’s University of Technology Thonburi,
major in Materials Engineering with 1st honours. Now, he is
pursuing Master’s degree of Polymer Science at the Petroleum
and Petrochemical College, Chulalongkorn University. He is a
student under supervision of Associate Professor Hathaikarn
Manuspiya, she has published more than 30 papers in the
worldwide journals such as Cellulose, Biomacromolecules, and
International Journal of Adhesion and Adhesive.
Piezo-triboelectric hybrid nanogenerator for raindrop energy
harvesting
Atissun Kittilaksanon and M Hathaikarn
The Petroleum and Petrochemical College, Thailand
Atissun Kittilaksanon et al., Nano Res Appl 2018, Volume: 4
DOI: 10.21767/2471-9838-C4-018