松香凹凸棒石粘土包膜尿素的制备及缓释性能的研究  

Synthesis of urea coating with attapulgite-rosin and study on its slow release properties

作　　者：朱鸿杰[1,2] 陈天虎[1] 彭书传[1] 

机构地区：[1]合肥工业大学资源与环境学院,安徽合肥230009 [2]安徽省农业科学院农产品加工研究所,安徽合肥230031

出　　处：《中国土壤与肥料》2011年第5期88-91,共4页Soil and Fertilizer Sciences in China

基　　金：安徽省2008年科技攻关项目(08010202140)

摘　　要：矿物和有机物复合包膜有利于提高肥料的利用效率。以松香的无水乙醇溶液为粘结剂,凹凸棒石粘土作为内包层,石蜡作为外层,采用熔融喷雾包膜的方法制备一种缓释包膜尿素。通过扫描电镜(SEM)分析得出,尿素内部形成一层以松香和凹凸棒石粘土为内包层的均匀膜,根据水浸泡试验和抗压强度测定表明,添加凹凸棒石粘土增加了包膜层的强度,松香粘结剂有利于增强膜的致密性与牢固性。缓释效果理想的样品初期释放率(24h)≤15%,28 d累积的释放率≤75%,能够达到缓控释肥料的国家标准或行业标准的要求。Coating of fertilizer with mineral and organic matter can enhance efficiency of fertilizer.In this paper,attapulgite clay mineral with rosin as the inner cladding and paraffin wax as the outer layer of package were employed to synthesize an engineering materials by using molten spray method.According to SEM analysis,the formation of uniform inner cladding film between urea and attapulgite with rosin bonder.Addition of attapulgite clay mineral and rosin bonder increased the strength and density of coating film respectively in terms of water immersion test and compressive strength measurement.The ideal product initial release rate（24 h）was more than 15%,28 days accumulated release rate was more than 75%,which could achieve national standards or industry standards of sustained and controlled release fertilizers.

关 键 词：松香 凹凸棒石粘土 包膜尿素 缓释肥料 

分 类 号：S145.6[农业科学—肥料学]