Green Composite Based on PHB and Montmorillonite for KNO3 and NPK Delivery System

Green Composite Based on PHB and Montmorillonite for KNO3 and NPK Delivery System Controlled release fertilizer (CRF) as a safe system for reducing environmental pollution still remains as demand for the agribusiness. Natural and biodegradable polymer materials have been proposed as a prominent and sustainable controlled delivery system. Composite based on polyhydroxybutyrate (PHB), starch, glycerol and montmorillonite (PHBSGMMt) has been proposed as a carrier for controlled release fertilizers, such as KNO3 and NPK. PHBSGMMt with 10 wt% of KNO3 or NPK processed by melting at 162 °C, 60 rpm during 10 min in a mixer chamber of torque rheometer. Composites were characterized according to its structure by FTIR and XRD, in thermal behavior by TGA and DSC, and morphology by SEM. Fertilizers release in water was determined by ionic conductivity. Clay, KNO3, and NPK increased the PHB/starch compatibility and homogeneity, resulting in a well-interfaced material obtained for PHBSGMMTNPK. MMtKNO3 was mainly on PHB phase and MMtNPK on the compatible polymeric phase. These behaviors explain the faster release of KNO3 in water medium since the KNO3 has high solubility and the phase separation creates fissures that turn in water pathway. Kinetic parameters classified the material as a non-Fickian diffusion or anomalous transport mechanism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Polymers and the Environment Springer Journals

Green Composite Based on PHB and Montmorillonite for KNO3 and NPK Delivery System

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Chemistry; Polymer Sciences; Environmental Chemistry; Materials Science, general; Environmental Engineering/Biotechnology; Industrial Chemistry/Chemical Engineering
ISSN
1566-2543
eISSN
1572-8900
D.O.I.
10.1007/s10924-017-0979-4
Publisher site
See Article on Publisher Site

Abstract

Controlled release fertilizer (CRF) as a safe system for reducing environmental pollution still remains as demand for the agribusiness. Natural and biodegradable polymer materials have been proposed as a prominent and sustainable controlled delivery system. Composite based on polyhydroxybutyrate (PHB), starch, glycerol and montmorillonite (PHBSGMMt) has been proposed as a carrier for controlled release fertilizers, such as KNO3 and NPK. PHBSGMMt with 10 wt% of KNO3 or NPK processed by melting at 162 °C, 60 rpm during 10 min in a mixer chamber of torque rheometer. Composites were characterized according to its structure by FTIR and XRD, in thermal behavior by TGA and DSC, and morphology by SEM. Fertilizers release in water was determined by ionic conductivity. Clay, KNO3, and NPK increased the PHB/starch compatibility and homogeneity, resulting in a well-interfaced material obtained for PHBSGMMTNPK. MMtKNO3 was mainly on PHB phase and MMtNPK on the compatible polymeric phase. These behaviors explain the faster release of KNO3 in water medium since the KNO3 has high solubility and the phase separation creates fissures that turn in water pathway. Kinetic parameters classified the material as a non-Fickian diffusion or anomalous transport mechanism.

Journal

Journal of Polymers and the EnvironmentSpringer Journals

Published: Mar 10, 2017

References

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