Synthesis of superabsorbent composite based on chitosan-g-poly(acrylamide)/attapulgite

Abstract The production of environmentally friendly SAP using biodegradable natural resources such as chitosan was synthesized for water saving and controlled-released fertilizer. Chitosan-g-poly(acrylamide)/attapulgite superabsorbent composites (CTS) were created by crosslinking N , '-methylene-bis-acrylamide (MBA) with (Ch), acrylamide, attapulgite (ATP) initiating the reaction potassium persulfate (KPS). Spectroscopic techniques Fourier transform infrared spectroscopy, thermal gravimetric analysis (TGA), scanning electron microscope used to characterize composite structures. It done determine how certain characteristics, initiator percentage, crosslinker ratio, clay content, affected composite's ability swell. results confirmed that stability improved addition ATP. maximum swelling attained when KPS concentration 0.1 g. However, 0.2 g a lower capacity. When amount ATP increased up 0.4 g, from 210 319 g/g. further 1.2 capacity decreased 170 As pH 3.0, ATP2 grew larger; nevertheless, it shrank between values 3 6. climbed 8, sharply grew. chosen composition evaluated controlled-release method urea fertilizer swelled g/g in (CTS2). findings demonstrated formulation's content 0 release rate delayed, length 5 21 h. Graphical abstract