2 research outputs found
Flexible, Quickly Responsive, and Highly Efficient Carbon Nanotube/Thermoplastic Polyurethane Composite Yarn for Multifunctional Wearable Devices
The advancement of next-generation
wearable electronics is highly
inclined with electro-conductive yarn having excellent flexibility
and functionality. However, the deficiency of existing metal-based
and nanomaterial (carbon nanotube, i.e., CNT)-based conductive wires
indeed limits their modest requirements due to inadequate elasticity
and mediocre antiabrasion ability in conjunction with stable electrothermal
performance for enough effective utilization in real textiles. This
study introduces an interesting approach to overcome the extant issue
by encapsulating CNT yarn with a thin, even shield of textile polymer,
i.e., TPU (thermoplastic polyurethane), combining two simple operations
of polymer infiltration and twisting. Two different concentrations%
of TPU solution (5 and 10%) were selected, and twisted CNT yarn was
prepared. Compared to pristine CNT yarn, 5% TPU-CNT yarn possesses
brilliantly enhanced tensile strength (+241%), stretchability (+125%),
exceptional tensile force (+216%), and extraordinary antiabrasive
performance (+1752%). In addition, the good range strain sensitivity
(∼39%), stable electromechanical prominence during 28 cyclic
loading at 6% tensile strain, and outstanding electrothermal stability
(for 200 s) reaching the temperature of 228 °C only within ∼10
s by low driving voltage (2 V) simply represent its high efficacy
to satisfy the prerequisite regarding comfort wear and steady conduction
for wearable electronics. The potential demonstrations of deicing
of ice by CNT/TPU yarn embedded 3D spacer woven composites with 58
times weight ratio within 9.6 min just signify its exceptional E-thermal
performance. The well-enough mechanical harmony with schemes and robustness
over periodical usages of as-developed highly flexible and sewable
TPU-CNT yarn opens up its promising prospects for new-generation smart
clothing as well as multifunctional composites
Controlled Mineralization of Calcium Carbonate on the Surface of Nonpolar Organic Fibers
Isotactic polypropylene (iPP) fiber, the surface of which
is hydrophobic,
can modulate the crystallization polymorphs of calcium carbonate (CaCO<sub>3</sub>) at the air/solution interface under mild conditions. The
present results provide a novel perspective on controlling the crystallization
of biominerals by an insoluble matrix, and they can shed new light
on understanding the biomineralization process of CaCO<sub>3</sub> as it occurs in nature