کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
238524 465761 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Urea particle coating for controlled release by using DCPD modified sulfur
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Urea particle coating for controlled release by using DCPD modified sulfur
چکیده انگلیسی

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.

Sulfur was modified with dicyclopentadiene (DCPD) to increase its strength and abrasion resistance. The shell of coated urea particles with modified sulfur was more compact than that with pure sulfur. The modified sulfur coated urea particles can be produced with thinner shell and higher strength, and had better controlled release properties.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 183, Issue 1, 18 March 2008, Pages 88–93
نویسندگان
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