Thermal post-treatment alters nutrient release from a controlled-release fertilizer coated with a waterborne polymer

Scientific Reports
Zijun ZhouJian-min Zhou

Abstract

Controlled-release fertilizers (CRF) use a controlled-release technology to enhance the nutrient use efficiency of crops. Many factors affect the release of nutrients from the waterborne polymer-coated CRF, but the effects of thermal post-treatments remain unclear. In this study, a waterborne polyacrylate-coated CRF was post-treated at different temperatures (30 °C, 60 °C, and 80 °C) and durations (2, 4, 8, 12, and 24 h) after being developed in the Wurster fluidized bed. To characterize the polyacrylate membrane, and hence to analyze the mechanism of nutrient release, Fourier transform mid-infrared spectroscopy, scanning electron microscopy, and atomic force microscopy were employed. The nutrient-release model of CRF post-treated at 30 °C was the inverse "L" curve, but an increased duration of the post-treatment had no effect. The nutrient-release model was "S" curve and nutrient-release period was enhanced at higher post-treatment temperatures, and increased post-treatment duration lengthened slowed nutrient release due to a more compact membrane and a smoother membrane surface as well as a promoted crosslinking action. CRF equipped with specified nutrient-release behaviors can be achieved by optimizing the thermal post-treat...Continue Reading

References

Jul 10, 2009·Pest Management Science·Atsushi WatanabeMutsuhisa Furukawa
Nov 21, 2009·Environmental Science & Technology·Molly E BrownNathaniel Higgins
Mar 23, 2011·Pharmaceutical Research·Elizabeth Rosado BalmayorRui L Reis
Jun 7, 2011·International Journal of Pharmaceutics·Susanne FredenbergAnders Axelsson
Mar 7, 2014·Journal of Controlled Release : Official Journal of the Controlled Release Society·Babar AzeemTrinh H Thanh

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Citations

Oct 25, 2017·Journal of the Science of Food and Agriculture·Dae-Young KimGajanan Ghodake

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Methods Mentioned

BETA
scanning
atomic force microscopy
AFM

Software Mentioned

NanoScope Analysis
AFM
NanoScope

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