单 位：
合肥工业大学资源与环境工程学院;合肥工业大学化工学院
关键词：
苯丙乳液;石蜡;凹凸棒石;包膜尿素;干燥时间;干燥温度
摘 要：
[目的]改进苯丙乳液-石蜡-凹凸棒石复合包膜尿素的生产技术。[方法]通过分别改变各种包膜材料(苯丙乳液、石蜡和凹凸棒石粉末)的用量、干燥时间以及干燥温度,制得不同的苯丙乳液-石蜡-凹凸棒石复合包膜尿素,并且利用水浸泡试验研究制得的不同包膜尿素在水中的溶解特征。[结果]苯丙乳液-石蜡-凹凸棒石复合包膜尿素的制备最佳工艺参数为:每包膜100克尿素,石蜡用量为20 g,凹凸棒石粘土用量为3 g,苯丙乳液用量为50~60 ml,干燥温度为60℃,干燥时间为120 min。[结论]各种膜材料用量、干燥时间以及干燥温度均影响着该复合包膜尿素的缓释效果。
译 名：
Influence Factors of Nitrogen Release Characteristics of Urea Coated with Styrene-acrylate Emulsion,Paraffin Wax and Attapulgite
作 者：
ZHANG Yan et al(School of Resources and Environment Engineering,Hefei University of Technology,Hefei,Anhui 230009)
关键词：
Styrene-acrylate emulsion;Paraffin wax;Attapulgite;Coated urea;Drying time;Drying temperature
摘 要：
[Objective] The research aimed to improve the production technology of urea coated with styrene-acrylate emulsion,paraffin wax and attapulgite.[Method] Different kinds of controlled-release coated urea were prepared from normal urea by coating with styrene-acrylate emulsion,paraffin wax and attapulgite by changing coating material.Consumptions,drying time and drying temperature.Their nitrogen slow-release characteristics were investigated by water immersion research.[Result] The best process parameters of the urea coated with styrene-acrylate emulsion,paraffin wax and attapulgite preparation were as follows: in 100 grams urea per parcel,the amount of paraffin wax was 20 grams,attapulgite was 3 grams,the amount of styrene-acrylic emulsion was 50-60 ml,drying temperature was 60 oC,and the drying time was 120 minutes.[Conclusion]Coating material(styrene-acrylate emulsion,paraffin wax and attapulgite) consumptions,drying time and drying temperature influenced the coated urea′s slow release effect.
