Electrokinetic and Hemostatic Profiles of Nonwoven Cellulosic/Synthetic Fiber Blends with Unbleached Cotton

Journal of Functional Biomaterials

J. Vincent Edwards¹  Elena Graves²  Alvin Bopp²  Nicolette Prevost²  Michael Santiago²  Brian Condon² 

[1] USDA-ARS, Southern Regional Research Center, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA;

关键词: nonwoven cotton;    hemostasis;    thromboelastography;    electrokinetic properties;    accelerated clotting;    contact angle;   

DOI  :  10.3390/jfb5040273

来源: mdpi

【 摘 要 】

Greige cotton contains waxes and pectin on the outer surface of the fiber that are removed when bleached, but these components present potential wound dressing functionality. Cotton nonwovens blended with hydrophobic and hydrophilic fibers including viscose, polyester, and polypropylene were assessed for clotting activity with thromboelastography (TEG) and thrombin production. Clotting was evaluated based on TEG measurements: R (time to initiation of clot formation), K (time from end of R to a 20 mm clot), α (rate of clot formation according to the angle tangent to the curve as K is reached), and MA (clot strength). TEG values correlate to material surface polarity as measured with electrokinetic parameters (ζ_plateau, Δζ and swell ratio). The material surface polarity (ζ_plateau) varied from −22 to −61 mV. K values and thrombin concentrations were found to be inversely proportional to ζ_plateau with an increase in material hydrophobicity. An increase in the swell ratios of the materials correlated with decreased K values suggesting that clotting rates following fibrin formation increase with increasing material surface area due to swelling. Clot strength (MA) also increased with material hydrophobicity. Structure/function implications from the observed clotting physiology induced by the materials are discussed.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.