We report on the synthesis and characterization of polyethylene-styrene-divinylbenzene-based interpolymer cation exchange membrane (ICEM) and its applicability as a separator in vanadium redox flow battery (VRFB). ICEM preparation involved radical...
A low-voltage nongassing electroosmotic
pump was assembled by sandwiching
a silica frit between two carbon paper electrodes that were dip-coated
with a paste consisting of phosphomolybdic acid/phosphotungstic acid
(PMA/PTA)-encapsulated multiwalled carbon nanotubes (MWCNTs) and Nafion.
The PMA/PTA encapsulation was a combined effect of their thermomigration
and nanocapillary action in MWCNTs. The encapsulated MWCNTs retained
desirable redox and charge transfer characteristics of PMA/PTA. The
stable voltammogram in 1 M H2SO4 solution exhibited
77% charge retention. A total of three different possible pump configurations,
namely, PUMP-I = PMA//SiO2//PMA, PUMP-II = PTA//SiO2//PTA, and PUMP-III = PMA//SiO2//PTA were put together.
They are in the sequence of the anode, silica frit, and cathode. All
pumps showed a linear dependence on the flow rate with a minimum operating
voltage of 1 V, which is well below the thermodynamic potential of
water splitting. PUMP-I provided an electroosmotic flux of 43.57 μLmin–1 V–1 cm–2 that
matched the requirement of an infusion device like an insulin pump.
The device was fabricated and its applicability has been demonstrated
by delivering ∼1.8 mL of water at a 10 ± 2 μLmin–1 flow rate at 2 V constant applied voltage over a
period of 3 h. Such a wearable device can be programed to deliver
model insulin or pain medication drugs for chronic diseases.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.