Optimization of human-like collagen composite polysaccharide hydrogel dressing preparation using response surface for burn repair.

Collagen and polysaccharide materials have great advantages for burn wound healing and skin regeneration. The purpose of this study was to develop a promising burn dressing. Mixing hyaluronic acid (HA), carboxylated chitosan (CCS) and human-like collagen (HLC) to simulate extracellular matrix (ECM), and glutamine transaminase (TG) was used as a crosslinker. The mechanical properties and pore size of the hydrogel were optimized by response surface methodology. The results showed that the tensile elastic modulus of the hydrogel was 480.43 ± 15.82 kPa, the tensile strain was 55.23 ± 2.43 %, and the pore size was 90.43 ± 5.57 μm. This study constructed a skin burn model and demonstrated that the hydrogel dressing could effectively prevent bacteria infection and confirmed that the hydrogel dressing was more beneficial for promoting burn wound healing than a commercial film (DUO DERM). Therefore, the HLC/HA/CCS hydrogel can be considered a promising burn wound dressing.