盐浓度对环糊精包合交联的PAA水凝胶流变性能的影响

Effect of Ionic Strength on the Rheological Properties of PAA Hydrogel Crosslinked by Cyclodextrin Inclusive Association

将6-乙二胺-β-环糊精(βCDen)和1-乙二胺-金刚烷(ADen)分别接枝于聚丙烯酸上并进行复配,制备了新型的聚合物网络。运用流变学方法研究盐浓度对该体系的弹性模量G′、粘性模量G″以及表观活化能的影响。结果表明:随着盐浓度从0.03 mol/L增大到0.1mol/L,水凝胶体系的弹性模量和粘性模量均明显增大,而体系的表观活化能逐步降低。

βCDen and ADen were grafted onto the poly（acrylic acid）（PAA） backbone.Novel polymer network hydrogel was formed by the complexation of the two grafted polymers.The effect of ionic strength on the storage modulus G′,loss modulus G″ and activation energies of the hydrogel system was studied by rheological method.The result indicated that： as the ionic concentration increased from 0.03 mol/L to 0.1 mol/L,the storage modulus and loss modulus increased while the activation energies decreased.