腐殖酸-聚丙烯酸包衣尿素的制备及其性能研究

Preparation and properties of urea coated by humic acid-poly-sodium acrylate

以腐植酸和丙烯酸为原料,通过水溶液聚合反应,合成了一种交联型腐植酸-聚丙烯酸保水性缓释肥包膜材料并应用于包衣尿素的制备。腐植酸质量分数为10%时,材料具有最大吸水率:675 g/g(去离子水),524 g/g(自来水),包衣尿素的氮素释放率为12.0%(24 h),59.0%(28 d)。

A series of high absorbent resins were prepared by cross-linking reaction of humic acid with acrylic acid and solution polymerization,and had been applied to prepare coated ureas.When the mass fraction of humic acid was 10%,the water absorbency was the best：675 g/g for deionized water and 524 g/g for tap water,and the mounts of release nitrogen of the coat urea were 12.0%（24 h） and 59.0%（28 d）.