Biodegradable IPN Hydrogels Based on Pre-vulcanized Natural Rubber and Cassava Starch as Coating Membrane for Environment-Friendly Slow-Release Urea Fertilizer

This study is to investigate the potential of ENR to be incorporated with chitosan for slow release urea fertilizer. In this research, mixture of chitosan and epoxidized natural rubber (ENR) was used as binder to take advantage of their biodegradable and polar characteristics, respectively. The effect of mixing formulation to the properties of fertilizer was studied. Firstly, the chitosan and ENR were diluted in toluene with the presence of bentonite as filler. Then, urea powder was mixed and stirred for 20 minutes before left to dry overnight in an oven at 60°C. Water absorption and water retention analysis were carried out on compressed pellets. The increase of ENR loading was observed to contribute to the increase of hydrophobic properties of the fertilizer. The findings were supported by compositional analysis using Fourier Transform Infrared spectroscopy (FTIR).

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Biodegradable hydrogels of cassava starch-g-polyacrylic acid/natural rubber/polyvinyl alcohol as environmentally friendly and highly efficient coating material for slow-release urea fertilizers

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2021.06.008 ◽

2021 ◽

Author(s):

Warunee Tanan ◽

Jate Panichpakdee ◽

Pitchayaporn Suwanakood ◽

Sayant Saengsuwan

Keyword(s):

Polyvinyl Alcohol ◽

Natural Rubber ◽

Polyacrylic Acid ◽

Slow Release ◽

Environmentally Friendly ◽

Cassava Starch ◽

Coating Material ◽

Biodegradable Hydrogels ◽

Highly Efficient ◽

Slow Release Urea

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An Eco-Friendly Slow-Release Urea Fertilizer Based on Waste Mulberry Branches for Potential Agriculture and Horticulture Applications

ACS Sustainable Chemistry & Engineering ◽

10.1021/sc500204z ◽

2014 ◽

Vol 2 (7) ◽

pp. 1871-1878 ◽

Cited By ~ 48

Author(s):

Yong Zhang ◽

Xiying Liang ◽

Xiaogang Yang ◽

Hongyi Liu ◽

Juming Yao

Keyword(s):

Slow Release ◽

Urea Fertilizer ◽

Slow Release Urea

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Characterization of Alginate-Cellulose-Kaolin Composites for Slow-Release Urea Fertilizer

Indo J Chem Res ◽

10.30598//ijcr.2021.8-sun ◽

2021 ◽

Vol 8 (3) ◽

pp. 219-227

Author(s):

Sunardi Sunardi ◽

Gusti Nia Faramitha ◽

Uripto Trisno Santoso

Keyword(s):

Slow Release ◽

Aqueous Media ◽

Entrapment Efficiency ◽

Swelling Ratio ◽

Release Agent ◽

Urea Fertilizer ◽

Wet Condition ◽

Slow Release Urea ◽

Cie Lab

Research on the effect of cellulose and kaolin addition to alginate-cellulose-kaolin composites' characteristics as a slow-release agent of urea fertilizer has been done. The technique used in composites' preparation is an extrusion technique using 2% CaCl2 solution as a cross-linker. The compositions of alginate-cellulose-kaolin were varied to determine their effect on composites' characteristics such as diameter, color, swelling ratio, entrapment efficiency, and release of urea. The results showed that the diameter of beads in wet condition produced ranges from 2.98 to 3.54 mm, whereas the diameter of dry beads ranges from 1.22 to 1.92 mm. The addition of cellulose and kaolin affected the color of the beads produced based on CIE Lab analysis. The value of the swelling ratio decreased with the addition of cellulose and kaolin. The entrapment efficiency of urea in beads obtained ranged from 37.25 to 45.06%. The release of urea in aqueous media showed that cellulose and kaolin's addition into the alginate affected the amount of released urea.

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