Recently, smart
hydrogels have attracted much attention for their abilities to respond to subtle changes in external and internal stimuli. Also, natural
polysaccharide-based
biomaterials are more appealing for their biocompatibility and biodegradability. However, limitations owing to their complex compositions and mechanisms, cumbersome synthetic routes, and single function call for a simple and effective strategy to develop novel multifunctional smart
hydrogels. Herein, this developed work was achieved based on Bletilla striata
polysaccharide (BSP), a kind of natural
glucomannan with diverse bioactivities and biocompatibility, we fabricated a low-cost multifunctional
hydrogel by oxidizing the
catechol groups of carboxymethylated BSP(CBSP)-
dopamine(DA) conjugate with adhesion,
antioxidant, and pH-responsive properties. In this
hydrogel system, CBSP as the backbone material, was negatively charged and conferred the
hydrogel with pH sensitivity. The presence of
catechol groups greatly enhanced the
tissue adhesion and
antioxidant capacities of the
hydrogel. Meanwhile, the highly porous structure of
hydrogel allowed
berberine to be encapsulated and released to exhibit excellent and long-lasting antibacterial activity. In summary, the adhesion,
antioxidant, pH-sensitive, and antibacterial multifunctional
hydrogel showed massive potential in the biomedical field.