Open AccessA simple micropump based on a freeze-dried superabsorbent polymer for multiplex solution processing in disposable devices
Author(s) -
Gokul Chandra Biswas,
Mohosin Rana,
Kazuhiro Takekoshi,
Hiroaki Suzuki
Publication year - 2019
Publication title -
royal society open science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 51
ISSN - 2054-5703
DOI - 10.1098/rsos.182213
Subject(s) - micropump , microfluidics , materials science , polymer , volumetric flow rate , superabsorbent polymer , flow (mathematics) , swell , nanotechnology , optoelectronics , biomedical engineering , composite material , mechanics , engineering , physics , thermodynamics
We describe a simple micropump for disposable microfluidic devices. The pump is constructed using a freeze-dried disc of a superabsorbent polymer (SAP). The disc absorbs a solution in a flow channel and swells upward in a pumping chamber. Despite the simple structure of this device, the rate of absorption remains constant and can be adjusted by changing the composition of the SAP, its size, the dimensions of the flow channel and the medium to be absorbed. The pumping action can be initiated by applying an electrical signal using a switchable hydrophobic valve. The integrated approach of the SAP pump and switchable valve could facilitate the automatic processing of many solutions required for bioassay.