Bio-based Large Tablet Controlled-Release Urea: Synthesis, Characterization, and Controlled-Released Mechanisms | Zendy

Lu Liu | Zendy; Tianlin Shen | Zendy; Yuechao Yang | Zendy; Bin Gao | Zendy; Li Y | Zendy; Jiazhuo Xie | Zendy; Yafu Tang | Zendy; Shugang Zhang | Zendy; Wang Zhong-hua | Zendy; Jianqiu Chen | Zendy

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Bio-based Large Tablet Controlled-Release Urea: Synthesis, Characterization, and Controlled-Released Mechanisms

Author(s) -

Lu Liu,

Tianlin Shen,

Yuechao Yang,

Bin Gao,

Li Y,

Jiazhuo Xie,

Yafu Tang,

Shugang Zhang,

Wang Zhong-hua,

Jianqiu Chen

Publication year - 2018

Publication title -

journal of agricultural and food chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.203

H-Index - 297

eISSN - 1520-5118

pISSN - 0021-8561

DOI - 10.1021/acs.jafc.8b04042

Subject(s) - coating , materials science , fumed silica , urea , chemical engineering , porosity , controlled release , scanning electron microscope , coated urea , nanotechnology , composite material , chemistry , organic chemistry , engineering

To improve nitrogen (N) use efficiency and minimize environmental pollution caused by fertilizer overuse, novel bio-based large tablet controlled-release urea (LTCRU) was prepared using bio-based coating materials to coat large tablet urea (LTU) derived from urea prills (U). Nano fumed silica (NFS) was added to the bio-based coating materials to improve the slow-release properties. The surface area of the LTU and U was measured by three-dimensional scanning. In comparison to U, LTU had a smaller surface area/weight ratio, which can reduce the coating materials. Scanning electron microscopy analysis showed that the addition of NFS in bio-based coating materials reduced the porosity of the coating shells of LTCRUs and, thus, enhanced the N release longevity of the controlled-released fertilizer. Dependent upon the pores on the coating shells of LTCRU, two N release patterns were revealed. Because of the good release characteristics, the novel LTCRU shows great potential to support sustainable agricultural production.

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