Nonmonotonic swelling of agarose‐carbopol hybrid hydrogel: Experimental and theoretical analysis

Journal of Polymer Science Part B Polymer Physics, Wiley, ISSN 1099-0488

Volume 55, 5, 2017

DOI:10.1002/polb.24286, Dimensions: pub.1074235861,



  1. (1) Department of Mechanical Engineering, Faculty of Engineering National University of Singapore Singapore
  2. (2) National University of Singapore, grid.4280.e
  3. (3) Aalborg University, grid.5117.2, AAU








A hybrid gel is synthesized by physical mixing of agarose and carbopol and an interpenetrating network of Agarose-Carbopol (AC) hybrid gel is observed by atomic force microscopy. This hybrid gel exhibits pH-responsiveness and mechanical stability as well as tunable swelling. These hydrogels depict a nonmonotonic swelling behavior as a function of pH. In particular, the equilibrium degree of swelling increases with pH of bath solution until its maximum value around pH =  , followed by a decrease at higher pH values. The degree of swelling is increased by the concentration of carbopol when the concentration of agarose is low [ ], or decreased by the concentration of agarose when is high [ ]. A physics-based model is also adapted to characterize the swelling-shrinking behavior of different compositions of AC gels. This swelling-shrinking behavior of AC hydrogels will have potential applications in smart hydrogel-based devices. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 444–454

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