Journal
ROYAL SOCIETY OPEN SCIENCE
Volume 6, Issue 3, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsos.182213
Keywords
superabsorbent; sodium polyacrylate; micropump; solution processing; disposable device; switchable valve
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Funding
- Japan Society for the Promotion of Science (JSPS), Japan [26560365]
- SUST research centre, Shahjalal University of Science and Technology, Bangladesh [LS/2017/04]
- Grants-in-Aid for Scientific Research [26560365] Funding Source: KAKEN
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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.
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