Incorporation of Saqez essential oil into polyvinyl alcohol/chitosan bilayer hydrogel as a potent wound dressing material

Nowadays, many studies are conducted on multilayer hydrogels for wound dressing. On the other hand, considering the emergence of bacterial resistance to common antibiotics, studies on the use of natural essential oils and their derivatives that have antibacterial and antioxidant activity can be useful. Herein, a novel bilayer hydrogel developed from polyvinyl alcohol and chitosan with the incorporation of Saqez essential oil (SEO) was synthesized. The results showed a gel-type structure with specific compression and flexibility, while the microscopic images confirmed the formation of a bilayer hydrogel. Further, the data showed that increasing the concentration of SEO reduces the swelling and water vapor permeability and increases the water retention and hydrophobicity of the hydrogel surface. The effects of the combination of SEO in the bilayer hydrogel led to a strong antioxidant property and increased antimicrobial activity. Also, the in vitro results demonstrated that the bilayer hydrogels are biocompatible, non-toxic, and blood compatible. Finally, the results of the in vivo tests showed that these bilayer hydrogels had good homeostatic efficiency. Overall, the obtained results indicate that these bilayer hydrogels are promising candidates for wound dressing.

Automated summary

Currently, research is being conducted in the field of multilayer hydrogels for wound dressing. Additionally, the use of natural essential oils and their derivatives with antibacterial and antioxidant properties has gained attention due to developing bacterial resistance to common antibiotics. In this study, a novel bilayer hydrogel composed of polyvinyl alcohol and chitosan with the incorporation of Saqez essential oil (SEO) was synthesized. The results indicated that the bilayer hydrogel showed gel-type structure, specific compression, and flexibility. Moreover, increasing the concentration of SEO resulted in reduced swelling and water vapor permeability, increased water retention, and enhanced hydrophobicity. The combination of SEO in the bilayer hydrogel demonstrated strong antioxidant properties and increased antimicrobial activity. The bilayer hydrogels were found to be biocompatible, non-toxic, and blood compatible according to in vitro tests. In vivo tests showed that these bilayer hydrogels exhibited good homeostatic efficiency. Overall, these bilayer hydrogels hold great potential as wound dressings.