Nutrient controlled release performance of bio-based coated fertilizer enhanced by synergistic effects of liquefied starch and siloxane

被引：17
作者：
Wang, Chao [1 ,2 ]
Song, Shuhui [1 ]
Du, Liqing [1 ,2 ]
Yang, Ziming [1 ]
Liu, Yunhao [1 ]
He, Zuyu [1 ]
Zhou, Chuang [1 ]
Li, Puwang [1 ]
机构：
[1] Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Hainan Key Lab Trop Crop Nutr, Zhanjiang 524091, Guangdong, Peoples R China
[2] Minist Agr & Rural Affairs, Key Lab Trop Fruit Biol, Zhanjiang 524091, Guangdong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2023年 / 236卷
基金：
中国国家自然科学基金;
关键词：
Bio-based material; Liquefied starch; Siloxane; Hydrophobic; Controlled release; SLOW-RELEASE; WATERBORNE POLYURETHANE; NITROGEN RELEASE; LIQUEFACTION; OIL; POLYMER;
D O I：
10.1016/j.ijbiomac.2023.123994
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The porous structure and hydrophilicity of coating shells affect the nutrient controlled-release performance of castor oil-based (CO) coated fertilizers. In order to solve these problems, in this study, the castor oil-based polyurethane (PCU) coating material was modified with liquefied starch polyol (LS) and siloxane, and a new coating material with cross-linked network structure and hydrophobic surface was synthesized, and used it to prepare the coated controlled-release urea (SSPCU). The results demonstrated that the cross-linked network formed by LS and CO improved the density and reduced the pores on the surface of the coating shells. The siloxane was grafted on the surface of coating shells to improve its hydrophobicity and thus delayed water entry. The nitrogen release experiment indicated that the synergistic effects of LS and siloxane improved the nitrogen controlled-release performance of bio-based coated fertilizers. Nutrient released longevity of SSPCU with 7 % coating percentage reached >63 days. Moreover, the nutrient release mechanism of coated fertilizer was further revealed by the analysis of the release kinetics analysis. Therefore, the results of this study provide a new idea and technical support for development of efficient and environment-friendly bio-based coated controlled-release fertilizers.
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页数：11
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