Preparation and characterization of slow-release fertilizer encapsulated by starch-based superabsorbent polymer

被引：336

作者：

Qiao, Dongling ^{[1
,2
,3
]}

Liu, Hongsheng ^{[1
]}

Yu, Long ^{[1
,2
]}

Bao, Xianyang ^{[1
]}

Simon, George P. ^{[2
]}

Petinakis, Eustathios ^{[3
]}

Chen, Ling ^{[1
]}

机构：

[1] S China Univ Technol, Ctr Polymer Renewable Resources, Guangzhou 510641, Guangdong, Peoples R China

[2] Monash Univ, Dept Mat Engn, Clayton, Vic 3168, Australia

[3] CSIRO, Mfg, Melbourne, Vic, Australia

来源：

CARBOHYDRATE POLYMERS | 2016年 / 147卷

关键词：

Starch-based superabsorbent polymer; Slow-release fertilizer; Different botanical origins; Nutrient slow-release; SMALL-ANGLE NEUTRON; TWIN-ROLL MIXER; WHEAT-STRAW; GRANULES; MICROCAPSULE; AMYLOPECTIN; POTATO; MODEL; RAMAN;

D O I：

10.1016/j.carbpol.2016.04.010

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：146 / 154

页数：9

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