摘要
针对粒状尿素包膜用材料,由正交试验确定了制备乙酰化淀粉(LSA)/聚乙烯醇(PVA)复合膜的优化配方:以LSA用量为100份基础上,PVA用量85份,纳米二氧化硅用量5份,六次甲基四胺用量14份,甘油用量12份。用对二甲氨基苯甲醛比色法初步研究了LSA/PLA包膜材料对尿素的透过性。并采用电导法研究了包膜化肥在水中的养分溶出情况。结果表明;LSA/PLA复合膜材料具有一定的控制释放性能LSA/PVA包膜化肥在水中浸泡1个月后相对电导率达到93%左右。
Aecording to coated material for granuled urea, the optimal formula of LSA/ PVA compound film was determined by orthogonal experiments. The optimal formula is as follows.on the basis of per hundred LSA, PVA 85 phr, nano-SiO2 5 phr, hexamethylene tet- ramine 14 phr, glycerol 12 phr. The urea permeability of LSA/PVA film was studied by the para-dimethylamine benzaldehyde colorimetry. The nutrient release rate of coated fertilizer in water was studied by conductivity method. The results indicate that LSA/PVA compound film can be applied as material for controlled release. The relative specific conductance of LSA/PVA coating fertilizer in water for a month reaches to about 93%.
出处
《现代塑料加工应用》
CAS
北大核心
2008年第4期16-19,共4页
Modern Plastics Processing and Applications
基金
国家"863"项目(2002AA6Z3181)。
关键词
包膜材料
乙酰化淀粉
尿素溶出率
养分释放速率
粒状尿素
coated material
acetylated starch
urea release rate
nutrient release rate
granuled urea
