Specialty Fabrics Review February 2022 - 18

[ BRIEFS ]
breakthroughs
Innovations in advanced textiles
Minimally obtrusive sensing
with smart textiles
I
n his presentation at IFAI EXPO 2021, Carsten
Linti of the German Institutes of Textile
and Fiber Research (DITF) outlined some
of the institutes' work with e-textiles R & D.
Smart textiles are proving particularly effective
as diagnostic systems, providing real time data
communication and diagnostics in a minimally
obtrusive connection between the human
body and the digital world. The integration into
leggings of sensors for EMG monitoring of
muscle fatigue eliminates the need for wetting or
adhesive attachments to the body making them
more comfortable and unobtrusive-particularly important when they need to be
worn over a length of time. Because they are easy to position with no wires or
sensor nodes, the wearer can fit the garment with sensors themselves, making
it suited for rehabilitation and sports training. Data is communicated to a smart
phone with a shift of the median frequency indicating muscle fatigue.
Eco-friendly passive cooling solution
S
cientists from MIT's Dept. of Mechanical Engineering have developed
a means to modify fibers of PE (polyethylene), found in plastic wrap
and grocery bags, to create fabrics that absorb and evaporate water more
quickly than common textiles such as cotton, nylon and polyester.
The nanopores in fabrics made of PE allow heat to escape rather than
trapping it against the body. PE is normally hydrophobic, but by extruding
the PE and bundling the fibers, the surface energy becomes weakly
hydrophilic, and the spaces between fibers form capillaries through
which water molecules can be passively absorbed. The absorption and
evaporation creates passive cooling. In addition, the researchers found it
would require less energy to produce PE textiles, compared to polyester
and cotton. MIT research scientist Svetlana Boriskina reports that a new
startup is working with the military and industrial partners on appropriate
applications for the textile.
18 SPECIALTY FABRICS REVIEW / February 2022
Nanopores in fabrics made of
PE allow heat to escape from
the body. Photos: MIT Dept.
of Mechanical Engineering.
Sensors can now be
integrated into leggings
making EMG monitoring
unobtrusive. Photo: DITF.
Fabric cross-sectional view.

Specialty Fabrics Review February 2022

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Specialty Fabrics Review February 2022 - Cover2
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