A one-pot strategy for preparation of carboxymethyl xylan-based hydrogels with antibacterial property

Hemicellulose-based hydrogels has been drawn more and more attention in recent years. In this paper, a series of carboxymethyl xylan-based hydrogels consisting carboxymethyl xylan (CMX), acrylamide (AM) and epsilon-poly-(Llysine) carbon dot (PL-CD) were synthesized by one-pot strategy via free radical polymerization. The N, N ' methylenebis(acrylamide) (MBA) was used as the crosslinking agent to form networks of the hydrogels. The PLCD was used as the antibacterial agent and nano-reinforcing agent to improve the antibacterial properties and mechanical properties of the hydrogels. The contents of AM, crosslinking agent and PL-CD had obvious effects on the compressive strength, swelling ratio (SR) and antibacterial properties. With the increase of AM, MBA and PLCD contents, the mechanical properties were improved. The SEM spectra confirmed the porous structure of the hydrogels. Furthermore, the pH-responsive behavior was also investigated by SR.