Specialty Fabrics Review January 2022 - 45

Triboelectric energy
Kinetic energy has received only
cautious attention until now, largely
because of the difficulty inherent
in quantifying it accurately. Recent
developments in triboelectric
nanogenerators (TENGs) could change
that. TENGs have the ability to convert
mechanical energy into electrical
power utilizing multiple sources, such
as wind, rain and human footfall.
The principles of triboelectrics
can be traced back to 1757, when
they were discovered by the Swedish
physicist Johan Carl Wilcke. Derived
from the Greek word " tribo, " which
means " rubbing, " the energy harvesting
occurs when materials are rubbed
together resulting in friction and an
exchange of electrons. The material
aspect is crucial, as the performance
of the TENG is directly linked to the
charge density of the contact surface
with nanotechnology particularly
important to maximize this.
Researchers at Pohang University
of Science and Technology in South
Korea (Kim et al.) have reported
enthusiastically on the potential for
lipid-based TENG in particular that
have the additional benefit of being
regenerative, which makes them more
sustainable. Still at an early stage of
development, the researchers say the
material is comprised of four distinct
layers: charge-generating, chargetrapping
layer, charge-collecting and
finally the energy storage layers.
Looking to the future, the researchers
see great potential for TENG-based
sensing in the body that harness the
subject's own biomechanical motion
to generate power.
Sweat energy
Human sweat is more usually
associated with power exerted rather
than a source of energy. At Nanyang
 DITF embroidered coils with a diameter of 60 mm(l. to r.): 60E12 ELITEX,
60U12 wrapping yarn, 60L12 copper yarn. Photo: DITF.
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Specialty Fabrics Review January 2022

Table of Contents for the Digital Edition of Specialty Fabrics Review January 2022

Specialty Fabrics Review January 2022 - Cover1
Specialty Fabrics Review January 2022 - Cover2
Specialty Fabrics Review January 2022 - 1
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Specialty Fabrics Review January 2022 - Cover3
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