2018-10

1st International Conference on Advanced Science and Engineering (ICOASE2018)

In this paper, pH-sensitive hydrogels were prepared and developed from cellulose fibers extracted from rice husks with sodium alginate by using a double cross-linker. Cellulose fibers extraction process was carried out by alkaline and bleaching treatment. Cellulose fibers were used in variable quantities to investigate their effects on swelling degree. The resulted hydrogels showed a very strong swelling (1785–2718%) in phosphate buffer solution (pH 7), good swelling (776–1195%) in pH 10, and less swelling (81–124%) in pH 4. All of these swelling degrees and more properties of the resulted cellulose fibers and hydrogels were tested and evaluated via some techniques like Infrared spectroscopy (ATR), thermal analysis (TG, DTG, DSC, and DTA), and Scanning electron microscopy (SEM). These results show that cellulose/alginate hydrogels could provide many possible applications in the biomedical, and purification of the wastewater by adsorbing pollutants