| 聚乙烯醇空心微球的制备及其对尿素的缓释作用(英文) |
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| 引用本文： | 邵兵,邱舒,张文莉,倪良,邵怿,王超.聚乙烯醇空心微球的制备及其对尿素的缓释作用(英文)[J].农业科学与技术,2008,9(5):8-12. |
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| 作者姓名： | 邵兵 邱舒 张文莉 倪良 邵怿 王超 |
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| 作者单位： | 江苏大学化学化工学院 |
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| 基金项目： | 国家自然科学基金
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江苏省镇江市社会发展基金
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| 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 respectively.Thus,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 study.Furthermore,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 ml.PVA 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.
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| 关 键 词： | Polyvinyl alcohol Hollow microsphere Emulsion chemical cross-linking Urea Sustained release effect |
Preparation for Polyvinyl Alcohol Hollow Microsphere and Its Sustained Release Effect on Urea |
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| SHAO Bing,QIU Shu,ZHANG Wen-li,NI Liang,SHAO Yi,WANG Chao.Preparation for Polyvinyl Alcohol Hollow Microsphere and Its Sustained Release Effect on Urea[J].Agricultural Science ＆ Technology,2008,9(5):8-12. |
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| Authors: | SHAO Bing QIU Shu ZHANG Wen-li NI Liang SHAO Yi WANG Chao |
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| Institution: | School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013 |
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| Abstract: | 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 meth-od, while its composition, morphology and particle size was analyzed by technologies of FT-IR, SEM and TEM respectively. Thus, 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 study. Furthermore, 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 e-mulsified speed 6 000 r/min, crosslink temperature 35 ℃ and linking agent amount 25 ml. PVA fertilizer cartier microsphere had significant sustained re-lease 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. |
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| Keywords: | Polyvinyl alcohol Hollow micrasphere Emulsion chemical cross-linking Urea Sustained release effect |
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