凹凸棒土/聚丙烯酸钠保水保肥树脂制备及性能

[目的]探讨凹凸棒土/聚丙烯酸钠复合树脂制备的最佳条件及其保水保肥性能。[方法]采用水溶液聚合法合成出高吸水性能的凹凸棒土/聚丙烯酸钠复合树脂,通过正交试验确定制备保水剂的最佳条件,并通过性能研究试验确定最佳条件下制备的保水剂性能指标。[结果]制备吸水剂的最佳条件为：交联剂、凹凸棒土、引发剂用量分别占树脂单体质量的0.050%、15.000%、0.450%,温度为75℃,中和度为90%。在此条件下制备的保水剂性能指标是：蒸馏水吸水倍率为762 g/g;保水剂在室温下24 h的水分蒸发率〈10.00%,在50℃水浴锅中10 h水分蒸发率为99.11%。[结论]该保水剂具有良好的保水保肥性能,对10.0 g/L的尿素溶液的吸附倍率为500g/g;由0.1 g树脂饱和吸附15%尿素溶液后制备的溶胶肥,用50 m l蒸馏水动态淋滤后尿素残留为34.4%。

Preparation on Water and Fertilizer Retaining Agent of Attapulgite/sodium Polyacrylate Resin and Its Properties

[Objective] The study aimed to discuss the optimum condition for preparing attapulgite/sodium polyacrylate compound resin and its properties of retaining water and fertilizer.[Method] The attapulgite/sodium polyacrylate compound resin were synthesized by the aqueous solution polymerization method,the optimum conditions for preparing the water and fertilizer retaining agent were confirmed through the orthogonal test and the property indexes of the water and fertilizer retaining agent prepared under the optim...