Abstract
Poly(acrylic acid) (PAA) and poly(vinylpyrrolidone) (PVP) are both highly safe synthetic polymers approved as pharmaceutical excipients. When their aqueous solutions are mixed, insoluble rigid complex is precipitated. On the other hand, if the dried PAA film was immersed in aqueous PVP solution, swollen PAA/PVP soft hydrogel was obtained. Heated drying of the gel afforded a transparent water-swellable film. The swellable PAA/PVP complex film exhibited favorable properties in medical use. If the film was put on a bleeding site, it swelled, and stuck to a hemorrhaging spot, and efficiently arrested bleeding. It could also prevent the adhesion formation by injured intestines.
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This work was partly supported by Izumi Science and Technology Foundation. Authors also thank CBC Co. Ltd., and BASF Japan Ltd. (Tokyo, Japan) for kindly giving PAA and PVP, respectively.
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Ito, T., Eriguchi, M. & Koyama, Y. Bioabsorbable bioadhesive hydrogel comprising poly(acrylic acid) and poly (vinylpyrrolidone) for adhesion barrier and hemostatic device. MRS Communications 5, 291–295 (2015). https://doi.org/10.1557/mrc.2015.14
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DOI: https://doi.org/10.1557/mrc.2015.14