Synthesis, Characterization and Water Swelling Properties of Borassus Aethiopum Starch-G Polyacrylamide Hydrogels
Year: 2024
Type: article
Abstract: Starch was extracted from Borassus aethiopum tuber using blending, filtration decantation methods. The starch-g-polyacrylamide was prepared by graft copolymerization between the Borassus aethiopum starch and acrylamide via solution polymerization using potassium per sulphate (KPS), as initiator and N1, N1Methylenebisacrylamide (crosslinker) respectively. The maximum water swelling percentage of the starch-g-polyacrylamide obtained at 0.2 g of initiator content was found to be 470 % with starch to the monomer ratio of 1:1. The functional group of the Borassus aethiopum starch, and the synthesized hydrogel were characterized by fourier transform infrared (FTIR) spectroscopy (model Cary 630 MY13270004 G8043-64002). The IR spectra of Borassus aethiopum starch obtained depict the presence of O-H stretching absorption band in the region of 3286 cm-1 (broad). The C-H bond stretching at 2933 cm-1 (medium) and absorption bands of 1153, 1082 and 996 cm-1 (s) for the C-O-C bond stretching. While spectra of starch-gpolyacrylamide display N–H stretching in the region 3500-3200 cm-1, 1655, and 1607 cm-1 indicated the presece of C=O stretching and N–H bending of the amide bands, respectively. This revealed the presence of -CONH2 functional group of the acrylamide before and after purification which shows all the absorption peaks of Borassus aethiopum starch. The raw starch and synthesized hydrogels were characterized using SEM and DSC. The SEM micrograph of the starch sample showed irregular shapes and varied particle sizes with white smooth surfaces. The SEM micrograph of the starch-g-polyacrylamide shows a very smooth surface with three dimensional networks on the SEM micrograph. The thermal stability of the Borassus aethiopum starch and starch-g-polyacrylamide hydrogels was also determined and found to be 68 oC and 75 oC respectively. This shows improvement of the thermal stability of the synthesized hydrogel. Therefore, purified Borassus aethiopum starch could be used in the synthesis of hydrogel
Institutions: Abubakar Tafawa Balewa University, Gombe State University
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7216624143