• Gang Zhou, Ruhan A, Heng Ge, Lin Wang, Meili Liu, Binbin Wang, Haisheng Su, Ming Yan, Yuan Xi, and Yubo Fan.
• Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
• Burns. 2014 Dec 1;40(8):1668-78.

AbstractBurn wound dressings have played significant roles in daily clinical practice. An "ideal" burn wound dressing is non-adhesion, absorbency and antimicrobial activity. However, such a dressing is currently not available. A novel composite hydrogel was based on poly (vinyl alcohol) (PVA) containing lysine (Lys) and vanillin (V) using freezing-thawing method. The properties of this hydrogel were characterized by environmental scanning electron microscope (ESEM), attenuated total reflectance fourier transform infrared spectroscopy (ATR-FTIR), tensile testing, differential scanning calorimetry (DSC) and water vapour transmission rate (WVTR). Then the antibacterial activity of PVA/Lys/V composite hydrogel was examined by bacteriolytic plate. In vivo experiment, a burn rat model was used to evaluate the histological analysis of this hydrogel. In results, the Schiff base formed in the three-phase system. It improved the tensile strength and crystallization of the PVA/Lys/V composite hydrogel. Meanwhile, this hydrogel showed excellent bactericidal activities to both gram-negative bacteria (E. coli) and gram-positive bacteria (S. aureus) due to the Schiff base. And the antibacterial activity toward gram-negative bacteria was better than another. On Day 7, 95-100% of the surface areas of PVA/Lys/V composite treated burns were covered with regenerating epidermis. And the new tissue and capillary vessel formed around the wounds after treatment. Therefore, it is suggested that treatment with PVA/Lys/V composite hydrogel will be effective also in patients with burns and other skin wounds.Copyright © 2014 Elsevier Ltd and ISBI. All rights reserved.

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