4种保水剂吸持水特性的比较研究

通过室内试验,比较研究了白金子(BJ),沃特(WT),巴斯夫(BF),黑金子(HJ)等4种保水剂的吸持水特性及对不同酸碱溶液的反应.结果表明,4种保水剂在蒸馏水中的吸水倍率最大,其次为1∶5的土壤漫提液中,在0.9%的NaCl溶液中的最小;且在土壤浸提液中,吸水倍率大小依次为:白金子(BJ)＞沃特(WT)＞巴斯夫(BF)＞黑金子(HJ).4种保水剂在pH 5～9的范围内,能吸收比自身重200多倍的水分.保水剂在蒸馏水中重复使用6次后,其吸水倍率仍可达到初始吸水倍率的50%以上.4种保水剂中,BF和WT具有快速吸水、缓慢释放的特性.初步认为测试的4种保水剂中BF的吸持水特性最好,其次为WT,最后是BJ和HJ.

Comparative study of water absorbing and retaining characteristics of four superabsorbents

Experiment was made to compare water absorbing and retaining characteristics of four superabsorbents,and their corresponding response to different alkali-saline solutions.The results indicated that the water absorption rate was the largest in distilled water,while in 0.9% NaCl solution,it was the least.In 1:5 soil saturation extract,the water absorption rate of the superabsorbents was compared as the following: BJ>WT>BF>HJ.The four superabsorbents could absorb water more than 200 times of their own weight,and the water absorption rate maintained over 50% of their original water absorption rate,even when they were reused for six times.BF and WT had the ability to absorb water quickly and release water slowly.We concluded that BF had the best water absorbing and retaining characteristics in four superabsorbents;secondly,it was WT.BJ and HJ were relatively worse.