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中文摘要：
采用丙烯酸与丙烯酰胺单体共聚法制备高吸水树脂（SAP）是提高吸水树脂性能的有效途径之一。选取两种聚丙烯酸钾-丙烯酰胺共聚型高吸水树脂,系统研究了四种金属离子对其交替吸水吸盐特征的影响。结果表明,金属离子对SAP有较强的抑制作用,四种金属阳离子对两种SAP吸水倍率及最大吸水能力的影响顺序为去离子水〈K＋〈Na＋〈Ca2＋〈Fe3＋,K＋、Na＋等一价离子对SAP吸盐特征的影响具有良好的恢复特性,而Ca2＋、Fe3＋等高价阳离子不具备可恢复特性。聚丙烯酸钾-丙烯酰胺共聚型SAP吸去离子水后的水凝胶并非经典三维网络交联结构,而是呈现出一个个形状及大小各异的蜂窝状立体交联网格膜结构,而吸四种金属离子后的SAP水凝胶内部结构存在形态各异的微形态特征。
英文摘要：
It is the effective approach to enhance the characteristics of superabsorbent polymers（SAP）by copolymerization with polyacrylate and polyacrylamide monomer.In this paper,two potassium-polyacrylate-polyacrylamide SAPs were chose,and the effect of four metal ions on its characteristics under alternated water-absorbing and salinity-absorbing was studied.The results show that：the metal ions have strong restrain function to the SAPs,and the effect order of two SAPs on the water-absorbing ratio and max capability is deionized waterK＋ Na＋ Ca2＋ Fe3＋.The effect of K＋ and Na＋ on the characteristics of salinity-absorbing can be comeback,but the Ca2＋ and Fe3＋ cannot.The micro-morphology of potassium-polyacrylate-polyacrylamide SAP hydrogel isn＇t the classical 3-dimensional network structure,but all membranes in 3-dimensional gridding membrane structure.The four cations have different influences on the micro-morphology of hydrogel.
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