丙烯酰胺/丙烯酸水凝胶的pH敏感性研究

The research about pH sensitivity of AAm/Ac hydrogel

测定并研究了丙烯酰胺 /丙烯酸凝胶的pH敏感性 ,及各因素对其性能的影响 ,实验表明 :当丙烯酰胺 /丙烯酸比在 2 :3附近时 ,形成的凝胶溶胀比最大 ;随着交联剂含量的增加 ,会使凝胶的溶胀比显著减小 ;引发剂含量适当时 ,可使凝胶溶胀比达到最大。并且从离子强度、相互反应方面对这种变化进行了解释。

We carried out a research to determine the pH sensitivity of PAAm/PAc hydrogel and the effect of all other factors on it.The experiment showed that swelling ratio of the hydrogel is maximum when the two kinds of subsatnces are mixed in composition ratio of about 2:3.It has been also found that,the more the amount of across-linking agent,the less the swelling rate of the hydrogel formed.When an appropriate amount of initializing agent is used,the hydrogel can reach the highest swelling ratio.Further analysis from many factors such as ionic intensity and interaction was also carried out.