聚(丙烯酸-丙烯酰胺)高吸水树脂吸水保水性能研究

摘要

Superabsorbent polymer has been attracted widespread attention and application,because of its higher water absorption,better water retention and salt-resistance.The water absorption and retention of PAA-AM in salt solution of different anion and cation strength,different pH values and different soil texture was investigated.The results show that PAA-AM has a big effect on salt solution of different anion and cation strength,the sequence of influence to ionic of different valence state was trivalence ＞ bivalence＞ monovalence; and optimum condition of used in environment of acid and alkali was pH value between 6 to 8; PAA-AM was put in soil and sand rate of different proportion,it can improve capability of soil water retention and soil aggregate structure;the water retention capability of infliction PAA-AM in sand is better than the other soil of same processed,so PAA-AM is more suitable for using in the soil of sand soil.%高吸水树脂具有良好的吸水性、保水性及耐盐性,受到广泛的关注及应用.研究了不同阴、阳离子强度、pH值及不同质地的土壤对聚(丙烯酸-丙烯酰胺)(PAA-AM)树脂的吸水保水性能的影响.结果表明,对于不同价态的阴、阳离子盐溶液,其对树脂吸液性能影响的大小顺序为三价＞二价＞一价;树脂在酸碱性环境中的最佳使用条件为pH值=6～8;在不同泥沙比的土壤中施加PAA-AM树脂,能显著改善土壤的蓄水保水能力及土壤团粒结构,其中施加PAA-AM树脂的沙土蓄水保水能力优于经同样处理的其它土壤,故PAA-AM树脂更适合施用于沙性土质土壤中.