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	Urea particle coating for controlled release by using DCPD modified sulfur
	Liu, Yong-Hui ; Wang, Ting-Jie ; Qin, Liang ; Jin, Yong
	2010-05-07 ; 2010-05-07
会议名称	POWDER TECHNOLOGY ; UK-China Particle Technology Forum ; Leeds, ENGLAND ; Web of Science
关键词	coating urea sulfur modification control release Engineering, Chemical
中文摘要	The shell of sulfur coated urea was easily cracked due to sulfur being friable. Sulfur was modified with dicyclopentadiene (DCPD) to increase its strength and abrasion resistance. SEM images showed that the micro-structure of modified sulfur was denser and more uniform than pure sulfur. The strength of modified sulfur increased with the DCPD/S ratio. Experiments of urea particle coating with sulfur and modified sulfur were carried out in a fluidized bed coater. The shell of coated urea particles with modified sulfur was more compact than that with pure sulfur. The modification retarded the sulfur phase transformation from monoclinic to orthorhombic, avoiding the crack formation in the coating shell of sulfur. The modified sulfur coated urea particles can be produced with thinner shell and higher strength, and had better controlled release properties. (C) 2007 Elsevier B.V. All rights reserved.
会议录出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/17100]
专题	清华大学
推荐引用方式 GB/T 7714	Liu, Yong-Hui,Wang, Ting-Jie,Qin, Liang,et al. Urea particle coating for controlled release by using DCPD modified sulfur[C]. 见:POWDER TECHNOLOGY, UK-China Particle Technology Forum, Leeds, ENGLAND, Web of Science.

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