Controlled Delivery System for NPK Agrochemical Release from Chitosan Copolymer Hydrogels
- 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.
Copyright: © 2022 Fawzi Habeeb Jabrail and Maysam S. Mutlaq. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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- NPK Agrochemical Fertilizer
- Poly (Vinyl Alcohol)
- Carboxymethyl Cellulose
- Controlled Release
- Water Retention