Porous Poly(Hexamethylene Biguanide) Hydrochloride Loaded Silk Fibroin Sponges with Antibacterial Function

Ahui Liang; Min Zhang; Hong Luo; Longxing Niu; Yanfei Feng; Mingzhong Li

doi:10.3390/ma13020285

Porous Poly(Hexamethylene Biguanide) Hydrochloride Loaded Silk Fibroin Sponges with Antibacterial Function

Materials (Basel). 2020 Jan 8;13(2):285. doi: 10.3390/ma13020285.

Authors

Ahui Liang¹, Min Zhang¹, Hong Luo¹, Longxing Niu¹, Yanfei Feng¹, Mingzhong Li¹

Affiliation

¹ National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China.

Abstract

In order to endue silk fibroin (SF) sponges with antibacterial function, positively charged poly(hexamethylene biguanide) hydrochloride (PHMB) was incorporated in SF through electrostatic interaction and by freeze-drying technique. The influence of PHMB on the structure and antibacterial activities of SF sponges was investigated. The zeta potential of SF was increased significantly when PHMB was incorporated in SF. The pores with size from 80 to 300 µm and the microscale holes in the pore walls within PHMB-loaded SF sponges provided the channels of PHMB release. The PHMB loaded in the porous sponges showed continuous and slow release for up to 20 days. Effective growth inhibition of both Escherichia coli and Staphylococcus aureus was achieved when the mass ratio of PHMB/SF was higher than 2/100. These results suggest that the porous PHMB/SF sponges have the potential to be used as a novel wound dressing for open skin wounds.

Keywords: antibacterial materials; poly(hexamethylene biguanide) hydrochloride; silk fibroin; sponges.

Abstract

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