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With the increasing need for bio‐based materials developed by environmentally friendly procedures, this work shows a green method to develop shape‐controlled structures from cellulose dissolving pulp coated by chitosan. This material was then tested to adsorb a common and widespread pollutant, 2,4‐dichlorophenol under different pH conditions (5.5 and 9). Herein it was noticed that the adsorption only occurred in acidic pH (5.5) where electrostatic interaction drove the adsorption, demonstrating the potential to tune the response under desired conditions only. The adsorption was successful in the hydrogel structure with an adsorption capacity of 905 ± 71 mg/g from a solution with 16.6 ppm; furthermore, adsorption was also possible with dried hydrogel structures, presenting a maximum of adsorption of 646 ± 50 mg/g in a similar 16.6 ppm solution. Finally, adsorbent regeneration was successfully tested for both, dry (rewetted) and never‐dried states, showing improved adsorption after regeneration in the case of the never dried hydrogel structures. [ABSTRACT FROM AUTHOR]

Gelatin and chitosan polysaccharides were chemically modified to get methacrylate functionality to obtain biocompatible hydrogels for use as tissue engineering scaffolds. The methacrylation reaction was verified by 1H‐NMR. The degree of methacrylation was varied from 7% to 40% by changing the molar ratio of polysaccharide to methacrylic anhydride and the type of polysaccharide utilized. After the modification, polysaccharide‐based hydrogels were prepared by free‐radical polymerization in the presence of UV light and Irgacure 184 as a photoinitiator. The physical, chemical, and mechanical performances of the hydrogels were further characterized. Also, the biodegradability and the viability of the polysaccharide hydrogels were investigated using fibroblast cells. These cells were seeded directly onto the hydrogel surface, populated the entirety of the hydrogel, and remained viable for up to 1 week. Altogether, the modified polysaccharides exhibit the properties which make them crucial for applications in the field of regenerative medicine. [ABSTRACT FROM AUTHOR]