TY - JOUR
T1 - Preparation and characterization of slow-release fertilizer encapsulated by starch-based superabsorbent polymer
AU - Qiao, Dongling
AU - Liu, Hongsheng
AU - Yu, Long
AU - Bao, Xianyang
AU - Simon, George P.
AU - Petinakis, Eustathios
AU - Chen, Ling
PY - 2016/8/20
Y1 - 2016/8/20
N2 - To enhance the effectiveness of fertilizers, a novel double-coated slow-release fertilizer was developed using ethyl cellulose (EC) as inner coating and starch-based superabsorbent polymer (starch-SAP) as outer coating. For starch-SAPs synthesized by a twin-roll mixer using starches from three botanical origins, a reduced grid size and an increased fractal gel size on nano-scale (i.e., increased stretch of 3D network) contributed to increasing the water absorbing capacity with a reduced absorbing rate and thus improving the slow-release property of fertilizer. The fertilizer particles coated with starch-SAP displayed well slow-release behaviors. In soil, compared to urea particles without and with EC coating, the particles further coated with starch-SAP showed reduced nitrogen release rate, and in particular, those with potato starch-SAP coating exhibited a steady release behavior for a period longer than 96 h. Therefore, this work has demonstrated the potential of this new slow-release fertilizer system for improving the effectiveness of fertilizers.
AB - To enhance the effectiveness of fertilizers, a novel double-coated slow-release fertilizer was developed using ethyl cellulose (EC) as inner coating and starch-based superabsorbent polymer (starch-SAP) as outer coating. For starch-SAPs synthesized by a twin-roll mixer using starches from three botanical origins, a reduced grid size and an increased fractal gel size on nano-scale (i.e., increased stretch of 3D network) contributed to increasing the water absorbing capacity with a reduced absorbing rate and thus improving the slow-release property of fertilizer. The fertilizer particles coated with starch-SAP displayed well slow-release behaviors. In soil, compared to urea particles without and with EC coating, the particles further coated with starch-SAP showed reduced nitrogen release rate, and in particular, those with potato starch-SAP coating exhibited a steady release behavior for a period longer than 96 h. Therefore, this work has demonstrated the potential of this new slow-release fertilizer system for improving the effectiveness of fertilizers.
KW - Different botanical origins
KW - Nutrient slow-release
KW - Slow-release fertilizer
KW - Starch-based superabsorbent polymer
UR - http://www.scopus.com/inward/record.url?scp=84964329279&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2016.04.010
DO - 10.1016/j.carbpol.2016.04.010
M3 - Article
AN - SCOPUS:84964329279
SN - 0144-8617
VL - 147
SP - 146
EP - 154
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
ER -