Preparation and characterization of a hemostatic porous platelet-rich plasma chitosan/silk fibroin wound dressing

Abstract

In order to further improve the hemostatic performance of wound dressings, human platelet-rich plasma (PRP) containing various growth factors was introduced into chitosan solution. The silk fibroin solutions with different volume ratios (1:1, 1:3, 3:1 and 1:0) were added to improve the porosity and hemostasis of materials. The hPRP-chitosan/silk wound dressings with different ratios was prepared by freeze-drying and pure chitosan dressing was considered as the control group to study the effects of PRP and silk fibroin in different proportions on the hemostasis properties and the growth factors burst release. The hemostasis of chitosan dressing was improved by introducing PRP, but the porous structure and water absorption were not significantly improved. If silk fibroin solution was added in the ratio of 1:1, the more uniform porous structure and better hemostatic performance could be obtained. The porosity and water absorption could reach 86.83%±3.84% and 1 474%±114% respectively. In addition, the dressings with ratio of 1:1 had positive effects on reducing the burst release of growth factors on initial stage. Therefore, PRP-chitosan/silk fibroin composite dressing can become a kind of wound dressing that can achieve rapid hemostasis and promote wound healing.