2021
DOI: 10.1016/j.eti.2021.101528
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The nitrogen slow-release fertilizer based on urea incorporating chitosan and poly(vinyl alcohol) blend

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Cited by 43 publications
(23 citation statements)
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“…Known release models (first-order, Higuchi, Hixon–Crowell, and Korsmeyer–Peppas models) were used to assess the urea release. The first-order model showed the best fit (Table ) for the release experiment data of low-amount urea formulations (U4.7/CP/G2.0, U4.7/CP/G3.2, and U2.8/CP/G3.2) …”
Section: Mathematical Models For Nutrient Releasementioning
confidence: 99%
See 1 more Smart Citation
“…Known release models (first-order, Higuchi, Hixon–Crowell, and Korsmeyer–Peppas models) were used to assess the urea release. The first-order model showed the best fit (Table ) for the release experiment data of low-amount urea formulations (U4.7/CP/G2.0, U4.7/CP/G3.2, and U2.8/CP/G3.2) …”
Section: Mathematical Models For Nutrient Releasementioning
confidence: 99%
“…As explained in the First-Order Release Kinetics section, Vo et al reported that the cross-linking strength of the CS/urea/PVA formulations affects the water absorbency in that further hydrolysis of the hydrogel contributed to the drop in water absorbency because the loose cross-linking structure created more space for entering water molecules …”
Section: Mathematical Models For Nutrient Releasementioning
confidence: 99%
“…The highest value of cumulative release reached 37.69% after 30 days. The combination between CS and glutaraldehyde as cross-linker has also been explored by Vo et al 110 Their main point was to improve the water absorbency and mechanical performance imparted by chitosan by blending it with poly (vinyl alcohol) (PVA). They both are biodegradable and present functional groups that can react with different reagents to change the structure of hydrogels for controlled release applications.…”
Section: Starchmentioning
confidence: 99%
“…As a result, they supply higher nutrient use efficiency and higher yields compared to conventional fertilizers [6]. There were some latest research on CRFs, such as polyurethane coatings which are modified castor oil and starch [7], poly (lactic acid-glycolic acid) and soy separation protein [8], biopolymer coatings which are liquefied corncob bio-based polyurethane, starch-based polyurethane (SPU) coating [7], wheat starch, polyethylene alcohol (PVA) and puffed soils, yak dung hydro-char (HC) [9], sawdust and tea waste biochar [10] and also a polysulfide-matrix [11], vitreous [12], iron-based metal-organic frameworks [13], municipal biowastes [14], hydrogel like tamarind kernel gum [14], chitosan (CS) and polyethylene alcohol (PVA) [15] and so on.…”
Section: Introductionmentioning
confidence: 99%