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Abstract
The adsorption of anionic surfactant sodium dodecylbenzenesulfonate (SDBS) onto preformed particle gels (PPGs) and the effect of SDBS on the swelling ratio and rheology of PPGs were investigated. SDBS molecules can adsorb onto PPGs because of the hydrophobic association with the chain of PPGs at low concentration and the association of the SDBS micelles with the chains of PPGs at high concentration. PPGs contract and the shear stress of PPGs decreases after adsorption of SDBS. In addition, the storage modulus decreases first and then increases with increasing SDBS concentration.
Acknowledgments
The authors acknowledge the projects (No. 20873181 and 21273286) supported by the NSFC, the project (No. ts20070704) supported by Taishan Scholars Construction Engineering, and the Natural Science Foundation of Shandong Province (ZRA10E8006).