Preparation for Polyvinyl Alcohol Hollow Microsphere and Its Sustained Release Effect on Urea

作     者：邵兵 邱舒 张文莉 倪良 邵怿 王超 SHAO Bing;QIU Shu;ZHANG Wen-li;NI Liang;SHAO Yi;WANG Chao

作者机构：江苏大学化学化工学院江苏镇江212013 

出 版 物：《Agricultural Science & Technology》 (农业科学与技术（英文版）)

年 卷 期：2008年第9卷第5期

页      面：8-12,18页

学科分类：09[农学] 090101[农学-作物栽培学与耕作学] 0901[农学-作物学] 

基　　金：Supported by National Natural Science Foundation(20773109) Fund for Social Development in Zhenjiang(SH2006067)~~ 

主　　题：Polyvinyl alcohol Hollow microsphere Emulsion chemical cross-linking Urea Sustained release effect 

摘      要：[Objective] The aim of this study was to discuss the optimizing preparation conditions of polyvinyl alcohol(PVA)hollow microsphere and its application in the production of slow-release urea fertilizer.[Method]PVA hollow microsphere was prepared by the emulsion chemical cross-linking method,while its composition,morphology and particle size was analyzed by technologies of FT-IR,SEM and TEM ***,factors such as rate of emulsified speed,crosslink temperature and linking agent amount with effects on morphology and particle size of hollow microsphere were also discussed in this ***,based on the optimizing preparation conditions,PVA fertilizer carrier microsphere was prepared by coating urea to investigate its sustained release effect on urea.[Result]The optimizing preparation conditions of polyvinyl alcohol(PVA)hollow microsphere were as follows:rate of emulsified speed 6 000 r/min,crosslink temperature 35 ℃ and linking agent amount 25 *** fertilizer carrier microsphere had significant sustained release effect on urea,and the optimal cross-linking time was 3 hours.[Conclusion]This study provides theoretical basis for the development of new slow-release fertilizer.