Radial Wicking of Biological Fluids in Paper.
Michael J Hertaeg, Rico F Tabor, Joseph D Berry, Gil Garnier
Langmuir | American Chemical Society | Published : 2020
In this study, we analyze stain growth kinetics from droplets of biological fluids such as blood, plasma, and protein solutions on paper both experimentally and numerically. The primary difference of biological fluids from a simple fluid is a significant wetting/dewetting hysteresis in paper. This becomes important in later stages of droplet wicking, after the droplet has been completely absorbed into paper. This is shown by anomalous power dependence of area with time in the later stages of radial wicking. At early stages, current numerical wicking models can predict stain growth of biological fluids. However, at later stages, the introduction of hysteresis complicates modeling significantl..View full abstract
Awarded by Australian Research Council
This research was funded by an ARC Linkage grant (LP160100544), Haemokinesis, and an Australian Government Research Training Program (RTP) Scholarship. The research was supported in part by Monash eResearch Centre and eSolutions-Research Support Services through the use of the MonARCH HPC Cluster. Thanks to David Paganin for advice on the analysis of X-ray images and the Red Cross Australia for supplying blood products.