Medical Design Briefs - May 2021 - 33

Conductive Cellulose Thread Shows Promise for
Healthcare Applications
The thermoelectric textile
produces a small amount
of electricity when heated
on one side.
Chalmers University of
Technology, Gothenburg,
Sweden

The production process for the cellulose thread has been developed by coauthors from Aalto University in
Finland. In a subsequent process, the
Chalmers researchers made the thread
conductive through dyeing it with an
electrically conductive polymeric materi-

" Miniature, wearable, electronic gadgets are ever more common in our daily
lives. But currently, they are often dependent on rare, or in some cases
toxic, materials. They are also leading
to a gradual buildup of great mountains of electronic waste. There is a
real need for organic, renewable materials for use in electronic textiles, " says
Sozan Darabi, doctoral student in the
department of chemistry and chemical
engineering at Chalmers University of
Technology and the Wallenberg Wood
Science Center, and lead author of a
scientific article recently published in
ASC Applied Materials & Interfaces.
Together with Anja Lund, another
researcher in the same group, Sozan
Darabi, has been working with electrically conductive fibers for electronic
textiles for several years. The focus was
previously on silk, but now the discoveries have been taken further through
the use of cellulose.

al. The researchers' measurements show
that the dyeing process gives the cellulose thread a record-high conductivity
- which can be increased even further
through the addition of silver nanowires. In tests, the conductivity was maintained after several washes.

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■ Built-In Electronics in Nontoxic,
Renewable, and Natural Materials
The results now presented by the
researchers show how cellulose thread
offers huge potential as a material for
electronic textiles and can be used
in many different ways. Sewing the
electrically conductive cellulose
threads into a fabric using a standard
household sewing machine, the
researchers have succeeded in producing a thermo electric textile that
produces a small amount of electricity
when it is heated on one side - for
example, by a person's body heat. At a
temperature difference of 37 °C, the
textile can generate around 0.2 μW of
electricity.
" This cellulose thread could lead to
garments with built-in electronic, smart
functions, made from nontoxic, renewable and natural materials, " explains
Darabi.

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Medical Design Briefs - May 2021

Table of Contents for the Digital Edition of Medical Design Briefs - May 2021

Medical Design Briefs - May 2021 - Intro
Medical Design Briefs - May 2021 - Cov4
Medical Design Briefs - May 2021 - Cov1
Medical Design Briefs - May 2021 - Cov2
Medical Design Briefs - May 2021 - 1
Medical Design Briefs - May 2021 - 2
Medical Design Briefs - May 2021 - 3
Medical Design Briefs - May 2021 - 4
Medical Design Briefs - May 2021 - 5
Medical Design Briefs - May 2021 - 6
Medical Design Briefs - May 2021 - 7
Medical Design Briefs - May 2021 - 8
Medical Design Briefs - May 2021 - 9
Medical Design Briefs - May 2021 - 10
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Medical Design Briefs - May 2021 - 33
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Medical Design Briefs - May 2021 - 36
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Medical Design Briefs - May 2021 - 39
Medical Design Briefs - May 2021 - 40
Medical Design Briefs - May 2021 - Cov3
Medical Design Briefs - May 2021 - Cov4
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