Research Article Open Access

Controlled Delivery System for NPK Agrochemical Release from Chitosan Copolymer Hydrogels

Fawzi Habeeb Jabrail1 and Maysam S. Mutlaq1
  • 1 Department of Chemistry, Mosul University, Mosul 41002, Iraq


Chitosan(CS) the polysaccharide was copolymerized with Poly (Vinyl Alcohol) (PVA) forthe preparation of CS-co-PVA hydrogel and with Carboxymethyl Cellulose (CMC)for CS-co-CMC hydrogel. The prepared hydrogels were characterized by FTIR,thermal analysis (TGA and DSC), and SEM. The hydrogels were studied foragriculture applications, where their ability to swell and take largequantities of water many times its weight was exploited for water retentionwhen the hydrogel was mixed with agricultural soil. For almost 40 days the soilin the soil/hydrogel sample was kept wet whereas the reference sample (withouthydrogel) has a maximum of 20 days wet. The next application was loading theNPK fertilizer applied as a model into the prepared hydrogels and then allowingto release of the loaded fertilizer in a controlled manner and for long timeintervals. Both hydrogels CS-co-PVA and CS-co-CMC have shown a high maximum loading percentage (Lmax%) and a highlyefficient loading percentage (EL%). Equivalent to the release characterof both hydrogels has shown a controlled agrochemical deliver pattern.

American Journal of Applied Sciences
Volume 19 No. 1, 2022, 84-92


Submitted On: 26 July 2022 Published On: 8 September 2022

How to Cite: Jabrail, F. H. & Mutlaq, M. S. (2022). Controlled Delivery System for NPK Agrochemical Release from Chitosan Copolymer Hydrogels. American Journal of Applied Sciences, 19(1), 84-92.

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  • NPK Agrochemical Fertilizer
  • Chitosan
  • Poly (Vinyl Alcohol)
  • Carboxymethyl Cellulose
  • Controlled Release
  • Water Retention