魔芋超强吸水剂的保水性及水分活度研究

Water Absorption Ability and Water Activity of Konjac Superabsorbent Polymer

对魔芋超强吸水剂（KSAP）粒径,溶液的pH值以及不同种类化肥溶液对KSAP吸液能力的影响进行了分析研究;测试了不同吸液率凝胶水分活度,并与植物根系水分活度进行了比较;且对KSAP的农林保水应用进行了尝试。结果表明,KSAP在pH值为6-8,KSAP粒径〉1 mm时,吸液性能最好;不同种类的化肥溶液对保水剂吸液倍率的影响按：（NH4）2SO4〉KH2PO4〉Na2SO4〉KNO3〉KCl〉（NH2）2CO〉去离子水的顺序递增;吸液率大于100倍时KSAP的水分活度高于植物根部水分活度,可充分提供植物生长所需水分且可有效减缓水分的自然流失和蒸发。

The effect of the grain size of the konjac superabsorbent polymer（KSAP）,the pH of the solution,the different kinds of fertilizer on the absorbent ability was studied,and water activity of different water absorbenct gel was measured and compared with that of root.A preliminary application in water conservation forestry was also attempted.The results indicated that the water absorption ability of the resin was the best at the pH value 6-8 and the grain size about 1 mm.The effect of different fertilizers on the water absorbent ability of KSAP followed the order of（NH4）2SO4〉KH2PO4〉Na2SO4 〉KNO3〉KCl（NH2）2CO〉（NH4）2SO4donized water.When KSAP water absorption was greater than 100 folds,the water activity is higher than that of plant roots,suggesting KSAP can not only provide adequate moisture for plant growth but also effectively slow down the natural loss of moisture and evaporation.