Effect of Sodium Alginate Content on the Properties of Chemical-Ionic Cross-Linked Hydrogel

Abstract:

Chemical-ionic cross-linked hydrogel (CIC) was prepared by using chemical-ionic cross-linker with acrylamide (AM) and sodium alginate (SA) of different contents serving as monomer, N,N'-Methylenebisacrylamide (MBA) and calcium chloride (CaCl2) acting as cross-linker. Swelling behaviors, micro pore structures, percentage of calcium atoms and tensile fracture stress of CIC hydrogel were investigated by weighting instrument, field transmission electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and tensile strength testing machine, respectively. The results indicate that with the contents of SA from 0.1g/20ml up to 0.4g/20ml, atom percentage of calcium of CIC hydrogel increases from 0.03 at% to 0.14 at%, and ionic cross-linked mechanism network in composite hydrogel increases, maximum swelling ratio (MSR) decreases from 21.96 g/g to 14.06 g/g, the pore structures which are interconnect at 0.1g gradually turn to cellular and isolate, and then appear compact. Maximum tensile fracture stress of hydrogel reinforced from 0.03 MPa up to 0.18 MPa.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 663-668
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.663
• Online since: December 2013
• Authors: Nian Yi Zhang*, Qing Song Zhang, Xue Feng Gao, Li Chen
• Keywords: Calcium Chloride, Chemical-Ionic Cross-Linking, Hydrogel, Sodium Alginate

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