Preparation and Characterization of Na-Alginate Hydrogel Beads

Authors : Mehlika PULAT, Duygu OZUKAYA

Pages : 32-38

View : 21 | Download : 10

Publication Date : 2019-07-25

Article Type : Research Paper

Abstract :A series of Na Alginate insert ignore into journalissuearticles values(Na-Alg); hydrogel beads were prepared by using ionic cross linking method. The beads were obtained by dropping of Na-Alg solution in chilled oil bath at -18 ºC first and then leaving the hardened beads into the cross linker solution. CaCl2 solution was used for ionic cross linking of Na-Alg molecules. While the concentration of Na-Alg solution was kept constant, crosslinking time was changed from 5 to 30 minutes. In general, longer crosslinking times negatively affect hydrogel formation. Swelling behaviors of the hydrogels were studied by changing time, temperature and pH. The higher crosslinker / polymer rates caused lower swelling values. It was determined that the swelling percentages regularly decreased with increasing the crossliking time. While the time increased from 5 to 30 minute, swelling percentages decreased from 158 % to 33 %. Temperature changing negligibly affects the swelling percentages. The prepared Na-Alg  hydrogels could not be commended as temperature sensitive.
Keywords : Hydrogel, Na Alginate, CaCl2, Swelling