Xuqing Liu, Haixin Chang
Electrically conductive yarns have attracted
consider- able attention because of their desirable properties including
electrical conductivity, flexibility, electrostatic discharge, electromagnetic
interference protection and radio frequency interference protection.
The development of conductive yarns is also
critical for various applications in wearable electronics such as wearable
displays, solar cells, actuators, data managing devices, and biomedical
sensors.
Conductive yarns directly spun from conductive
materials including metals, metal oxides, carbon nanotubes (CNTs), and
conducting polymers were first demonstrated as prototype materials for wearable
electronics, yet they are expensive and difficult to be produced on a large
scale
A more economic and productive way of making
conductive yarns is coating conventional fibers with a layer of metals, CNTs,
or conducting polymers, followed by spinning into yarns.
Cotton, cellulose in nature, is the most widely
used natural fiber in the world. It is low-cost and clean to produce, and has a
wide variety of applications in textile clothe, upholstery, daily care, and
medicine
To address the challenge, this group of
scientist reported a novel, facile, and versatile approach for preparing highly
durable, electrically conductive cotton yarns by electroless deposition (ELD)
of metal particles onto cotton yarns modified with polyelectrolyte brushes as
adhesion layer. The process is really interesting, and can be
seen in the following figure.
The resulting yarns were tested as wires to power
LEDs, it can be seen that they don’t need more cables or conducting glue, just
a DC power (battery) and put the LED into the fabric. It turns on as it was connected
with normal wires.
This yarn can help to produce electronic textiles because
of its great conductive properties.
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