Preparation and characterization of triple polymer‐coated controlled‐release urea with water‐retention property and enhanced durability
Preparation and characterization of triple polymer‐coated controlled‐release urea with water‐retention property and enhanced durability
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DOI：
10.1002/app.33366
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发表时间：
2011-05
影响因子：
3
通讯作者：
Shuming Tao;Jun Liu;Kemo Jin;Xiaoyun Qiu;Y. Zhang;X. Ren;Shuwen Hu
中科院分区：
文献类型：
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作者：
Shuming Tao;Jun Liu;Kemo Jin;Xiaoyun Qiu;Y. Zhang;X. Ren;Shuwen Hu
在流化床涂布机中，将聚乙烯（第一层）、聚（丙烯酸-共聚-丙烯酰胺）高吸水性树脂（第二层）和聚（甲基丙烯酸丁酯）（第三层）依次涂布在颗粒核心尿素上，制得了缓释保水肥料（TCWF）包裹的三重聚合物，增强了力学性能。内层具有控释特性，中间层具有吸水特性，外层较薄，用于保护高吸水性树脂的脆性层。建立了包膜层厚度与养分释放性能的关系。研究了聚合工艺参数对高吸水性树脂吸水倍率的影响，并进行了优化。研究并比较了该三层包膜尿素在水和土壤中的养分释放行为。结果表明，TCWF不仅是一种良好的控释肥料，而且具有良好的保水性能。© 2010 Wiley Periodicals，Inc.应用聚合物科学杂志，2011年
Triple polymer coated with controlled-release water retention fertilizer (TCWF) and enhanced mechanical property was developed by coating polyethylene (first layer), poly (acrylic acid-co-acrylamide) superabsorbent (second layer), and poly (butyl methacrylate) (third layer) consecutively on the granule core urea in the fluidized-bed coater. The inner layer possessed controlled-release property, the middle layer had water absorbent characteristic, and the thin outer layer aimed to protect the fragile layer of the superabsorbent. The relationship between the thickness of coating layer and the nutrient releasing properties was established. The effects of polymerization parameters on the water absorbency of the superabsorbent were studied and optimized as well. The nutrients release behaviors of this triple-coated urea in both water and soil were investigated and compared. The results showed that TCWF not only performed as a good controlled-release fertilizer but also had excellent water retention capacity. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011