以CMCTS-g-PAA和CMCTS-g-(PAANa-co-PVP)两类羧甲基壳聚糖改性阴离子型高吸水性树脂凝胶为研究对象,对其所吸收液体性能变化的响应性进行了研究.研究发现,阴离子型高吸水性树脂随乙醇/水混合溶剂中乙醇体积分数(φ)的增大发生体积相转变;随树脂结构中链段极性的增大,凝胶相变点相应的(φ)值降低;并随所吸收液体中低极性乙醇含量的增大,-COO-之间的相互排斥作用减弱,树脂的吸水速率降低.当研究溶液离子强度对树脂溶胀性能的影响时发现,1/S值较大时,离子强度与Q5/3成正比;但离子浓度较大时,Q5/3与1/S的线性关系消失.此外所吸收溶液的pH值对树脂的吸收率也有很大的影响.
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