The Effect of the Conformation Process on the Physicochemical Properties of Carboxymethylcellulose-Starch Hydrogels

Author(s)

Vedovello, Priscila ; Paiva, Robert Silva ; Bortoletto-Santos, Ricardo ; Ribeiro, Caue ; Putti, Fernando Ferrari

• Document type: Journal article
• Source: GELS; v. 11, n. 3, p. 15-pg., 2025-03-06.

Abstract

This study discusses the preparation of biopolymeric hydrogels (a biomaterial) via different techniques, such as casting and extrusion, to compare the effects of the process and the use of citric acid as a crosslinker on the morphology, physicochemical properties, and degree of swelling of the hydrogel. Casting is widely used for its low cost and space-saving nature, but upscaling is problematic. Extrusion offers a way to produce materials in large quantities; these materials can undergo mechanical and thermal energy, which can significantly alter their properties. The samples obtained by extrusion had porous surfaces, which are critical for the water penetration and swelling of superabsorbent hydrogels. In contrast, the hydrogels produced by casting did not form pores, resulting in a lower degree of swelling. Extrusion increased the degree of swelling threefold due to the formation of pores, influencing water absorption and diffusion dynamics, especially in samples with higher starch content, where crosslinking occurred more effectively. (AU)

• FAPESP's process: 23/01549-8 - Development of wet mechanochemical treatment for the use of WTP sludge as raw material for the production of controlled-release fertilizers
• Grantee: Cauê Ribeiro de Oliveira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 20/12210-3 - Development of technological alternatives for the use of ETA sludge as raw material for the production of controlled release fertilizers
• Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
• FAPESP's process: 22/03005-2 - Development of new technologies to reduce the effects of water stress in models integrated into nutrient administration
• Grantee: Fernando Ferrari Putti
• Support Opportunities: Research Grants - Initial Project