Abstract
Poly (acrylamide-co-acrylic acid) [poly (AAm-co-AAc)]-based hydrogels were prepared by varying the cross-linking agent concentration (NMBA) in the range of 0.0077% to 0.077%. The effect of the NMBA content on swelling parameters, such as water absorbency, swelling ratio on the hydrogel was studied by keeping two monomers content, that is, AAm and AAc constant. The effect of KPS as an initiator in the range of 0.1% to 0.5% on the water absorbency of the hydrogels was also studied. The swelling value could be modulated in a great range by varying the cross-linking agent (NMBA) or initiator (KPS) concentration at fixed monomer concentration. The synthesized hydrogels were characterized by FTIR, SEM and network parameters, such as average molecular weight between cross-links (Mc), cross-link density (q) and mesh size (ξ). The experimental results showed that the equilibrium water absorbency decreases from 707.23 to 389 with increasing the NMBA content from 0.0096 % to 0.0385%. The network parameters, such as average molecular weight between cross-links (Mc) were decreased from 2.33 × 1012 to 2.30 × 1011 and cross-link density (q) decreased from 3.07 × 10−11 to 3.09 × 10−11; although mesh size (ξ) increased from 3.00 × 106 to 8.89 × 106 with increase in percentage of NMBA content from 0.009265% to 0.077%. The equilibrium water absorbency of various hydrogels were studied in distilled water and different types of saline solutions, which exhibited that hydrogels have higher equilibrium water absorbency in 0.009% saline (NaCl) solution than in 0.09% and 0.9% saline solutions. From the results it was clear that water absorbency increased from 302 to 573 g water/g sample with increasing the KPS content from 0.1 to 0.5%.
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Reference
Buchholz FL, Peppas NA (1994) Superabsorbent polymer science and technology, ACS Symposium Series 573, American Chemical Society, Washington DC
Kabiri K, Omidian H, Hashemi SA, MJ, Zohuriaan-Mehr (2003) J Polym Mater 20:17
Solpan D, Duran S, Guven O (2002) J Appl Polym Sci 86:3570
Tokuyama H, Ishihara N, Sakohara S (2007) Eur Polym J 43:4975
DSilva R, MG. deOliveira (2007) Polym 48:4114
Li A, Wang A (2005) Eur Polym J 41:1630
Chen J, Zhao Y (2000) J Appl Polym Sci 75:808
Tomar RS, Gupta I, Singhal R, Nagpal AK (2006) Dis Monomer Polym 9:1
Tomar RS, Gupta I, Singhal R, Nagpal AK (2007) Polym Plast Tech Eng 46:1
Omidian, Hashemi SA, Sammes PG, Meldrum I (1998) Polym 39:6697
Flory PJ (1953) Principles of Polymer Chemistry, Cornell University Press. Ithaca
Ding ZY, Akloins JJ, Salovey R (1991) J Polym Sci B Phys 29:1035
Chen J, Park H, Park K (1999) J Biom Mat Res 44:53
Xue W, Champ S, Huglin MB (2001) Polym 42:3665
Peppas NA, Merrill EW (1976) J Polym Sci Polym Chem 11:441
Gudeman LF, Peppas NA (1995) J Appl Polym Sci 55:919
Saradyin DD, Lsikver Y, Karadag E, Nurettin S, Olgun G (2002) Nucl Instrum Meth Phys Res B87:340
Alcock HR, Frederick WL (1981) Contemporary Polymer Chemistry; Prentice-Hall: Englewood, Cliffs
Mahdavinia GR, Pourjavadi A, Hosseinzade H, Zohuriaan MJ (2004) Eur Polym J 40:1399
Kabiri K, Omidian H, Hashemi SA, Zohuriaan-Mehr MJ (2003) J Polym Mater 20:17
Liu zs, Rampel GL (1997) J Appl Polym Sci 64:1345
Li A, Wang A (2005) Eur Polym J 41:1630
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Singhal, R., Tomar, R.S. & Nagpal, A.K. Effect of cross-linker and initiator concentration on the swelling behaviour and network parameters of superabsorbent hydrogels based on acrylamide and acrylic acid. Int J Plast Technol 13, 22–37 (2009). https://doi.org/10.1007/s12588-009-0004-4
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DOI: https://doi.org/10.1007/s12588-009-0004-4