Tough, Rapidly Swelling Thermoplastic Elastomer Hydrogels for Hemorrhage Control

We present a novel elastomer with an amphiphilic triblock/graft architecture, allowing it to rapidly swell in water and form a tough hydrogel. The design was motivated by uncontrolled hemorrhage, responsible for 80–90% of potentially survivable deaths of US soldiers over the past 15 years. The polym...

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Veröffentlicht in:Macromolecules 2018-06, Vol.51 (12), p.4705-4717
Hauptverfasser: Bain, Erich D, Long, Tyler R, Beyer, Frederick L, Savage, Alice M, Dadmun, Mark D, Martin, Halie, Lenhart, Joseph L, Mrozek, Randy A
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Sprache:eng
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Zusammenfassung:We present a novel elastomer with an amphiphilic triblock/graft architecture, allowing it to rapidly swell in water and form a tough hydrogel. The design was motivated by uncontrolled hemorrhage, responsible for 80–90% of potentially survivable deaths of US soldiers over the past 15 years. The polymer is 5.7 times as absorbent and 3 times as tough as a state of the art gauze-based hemostatic dressing. It swells to equilibrium within seconds in phosphate buffered saline due to a microphase-separated morphology featuring a continuous mobile ionic phase supported by hydrophobic glassy domains and rubbery linkages, as observed by transmission electron microscopy and small-angle neutron scattering. Thickness-dependent swelling is as much as an order of magnitude faster than many tough hydrogels in the literature, yet toughness is comparable as a function of water content. The polymer is combined with gauze to form a rapidly swelling, fiber-reinforced hydrogel composite with promising mechanical properties.
ISSN:0024-9297
1520-5835
DOI:10.1021/acs.macromol.8b00428