Abstract
The swelling behaviors of SAF in distilled water and various saline solutions were investigated and the absorption mechanism of SAF was discussed. Emphasises were laid on the effects of swelling time, saline solutions as well as the pH values of solutions on water absorbency of SAF. Results showed that water absorbency of SAF was significantly influenced by ion concentration and ionic valence of saline solutions as well as the pH values of solutions, but it was less affected by swelling time after reaching swelling equilibrium. The absorption mechanism of SAF is consistent with Flory’s theory of network and the osmotic pressure difference between SAF and the external solution is the motive force for swelling of SAF.
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