Physicochemical Properties of Hybrid Biodegradable Silica-Hydrogel Composites

Author(s)

Watanuki Filho, Adhemar ; Yonezawa, Uilian Gabaldi ; de Moura, Marcia Regina ; Aouada, Fauze Ahmad

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 26, p. 9-pg., 2023-01-01.

Abstract

Hydrogels based on polyacrylamide, carboxymethylcellulose and silica are composites with good absorption and release properties over time, and this behavior allow their application in several areas. Thus, the aim of study was to analyze the absorption kinetic, spectroscopic, morphological, and structural properties of hydrogels prepared using different silica concentrations (0, 0.5, and 2.5%). The results showed that the swelling degree reduces with increasing silica, i.e., there was increase in crosslinking density, which was confirmed by SEM images. The reductions in the swelling degrees at equilibrium were 26.19% (0.50% silica) and 22.02% (2.5% silica) when compared to PAAm+CMC hydrogel. FTIR spectra showed characteristic spectroscopic bands of silica between 1384 and 1120 cm-1 indicating that its incorporation into the hydrogel matrix has occurred, which was also observed in the XRD diffractograms. Thus, the study of biodegradable hybrid hydrogels is relevant because they can potentially be applied in areas such as agriculture, tissue engineering and even civil construction. (AU)

• FAPESP's process: 13/03643-0 - Study of novel biodegradable carrier vehicles of fertilizers and agricultural defensives based on hydrogel and nanostructure silicates as an alternative in the combat of environmental impacts
• Grantee: Fauze Ahmad Aouada
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 18/18697-1 - Development of novel magnetic nanocomposites based on hydrogel for evaluation as carrier vehicle of drugs and agricultural inputs
• Grantee: Fauze Ahmad Aouada
• Support Opportunities: Regular Research Grants