Abstract
Clay is frequently incorporated to many materials including superabsorbent polymers (SAPs) to improve their properties. Superior properties have been reported for the SAP composite (SAPC) materials comparing to their clay-free counterparts. However, study of the effect of clay on some of very important requirements of superabsorbents, particularly the residual monomer (RM), has been unnoticed in the academic literature. Here, we report preparation of a series of SAPCs via a conventional solution polymerization of partially neutralized acrylic acid in the presence of common MMT clay (Na-montmorillonite). The products were characterized by FTIR spectroscopy, differential scanning calorimetry, thermogravimetric, thermomechanical, and rheometrical analyses. The RM content of the samples was determined by high performance liquid chromatography. It was found that the clay had unfavorable effects on the crosslinking polymerization process. This fact was observed as declining mechanical strength of the SAPCs in both dried and swollen states, increased swelling capacity, decreased gel fraction, and increased RM content. For instance, RM of clay-free sample was 740 ppm which was continuously increased with level of the clay incorporated. It surprisingly reached to ~34,000 ppm at clay content of 12%. The undesirable function of clay was attributed to inactivation and barrier effects of clay incorporated to the polymerization medium. These unwanted effects were more pronounced at high clay content. However, overall thermostability of SAPCs was improved comparing to the non-composite counterpart. It was concluded that such conventionally prepared SAPCs, in spite of the previously reported claims, could not be suitable candidates for hygienic applications, particularly those prepared with high clay percentages.
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References
Buchholz FL, Graham T (1998) Modern superabsorbent polymer technology. Wiley-VCH, New York, p 252
Zohuriaan-Mehr MJ, Kabiri K (2008) Iran Polym J 17:451
Zohuriaan-Mehr MJ, Omidian H, Doroudiani S, Kabiri K (2010) J Mater Sci 45:5711. doi:https://doi.org/10.1007/s10853-010-4780-1
Kabiri K, Zohuriaan-Mehr MJ, Bouhendi H, Jamshidi A, Khan-Beigi FA (2009) J Appl Polym Sci 114:2533
Kabiri K, Hesarian S, Zohuriaan-Mehr MJ, Jamshidi A, Boohendi H, Pourheravi MR, Hashemi SA, Khan-Beigi FA (2011) J Appl Polym Sci 120:2716
Kabiri K, Zohuriaan-Mehr MJ (2004) Macromol Mater Eng 289:653
Kabiri K, Zohuriaan-Mehr MJ (2003) Polym Adv Technol 14:438
Yi JZ, Zhang LM (2007) Eur Polym J 43:3215
Li A, Zhang JP, Wang AQ (2007) Bioresour Technol 98:327
Pourjavadi A, Hosseinzadeh H, Mahdavinia GR, Zohuriaan-Mehr MJ (2007) Polym Polym Compos 15:43
Gao D (2003) Ph.D. Thesis, Freiburg University, Germany
Su XF, Zhang G, Xu K, Wang JH, Song CL, Wang PX (2008) Polym Bull 60:69
Lee WF, Yang LG (2004) J Appl Polym Sci 92:3422
Santiago F, Mucientes AE, Osorio M, Poblete FJ (2006) Polym Int 55:843
Kabiri K, Mirzadeh H, Zohuriaan-Mehr MJ (2009) Polym Int 58:1252
Kabiri K, Mirzadeh H, Zohuriaan-Mehr MJ (2010) J Appl Polym Sci 116:2548
Kabiri K, Omidian H, Zohuriaan-Mehr MJ, Doroudiani S (2011) Polym Compos 32:277
Jamshidi A, Khan-Beigi FA, Kabiri K, Zohuriaan-Mehr MJ (2005) Polym Test 24:824
Ramazani-Harandy MJ, Zohuriaan-Mehr MJ, Ershad-Langroudi A, Yousefi AA, Kabiri K (2006) Polym Test 25:470
Kabiri K, Omidian H, Hashemi SA, Zohuriaan-Mehr MJ (2003) J Polym Mater 20:17
Kabiri K, Omidian H, Hashemi SA, Zohuriaan-Mehr MJ (2003) Eur Polym J 39:1341
Kabiri K, Omidian H, Zohuriaan-Mehr MJ (2003) Polym Int 52:1158
Kabiri K, Zohuriaan-Mehr MJ (2004) Iran Polym J 13:423
Zohuriaan-Mehr MJ, Motazedi Z, Kabiri K, Ershad-Langroudi A (2005) J Macromol Sci Pure Appl Chem 42:1655
Kabiri K, Mirzadeh H, Zohuriaan-Mehr MJ (2008) J Appl Polym Sci 110:3420
Yavari-Gohar MR, Kabiri K, Zohuriaan-Mehr MJ, Hashemi SA (2010) J Polym Res 17:151
Chen G, Liu S, Chen S, Qi Z (2001) Macromol Chem Phys 202:1189
Ibrahim M, Nada A, Kamal DE (2005) Indian J Pure Appl Phys 43:911
Kim HS, Chen GX, Jin HJ, Yoon JS (2008) Colloids Surf A Physicochem Eng Aspects 313:56
Lpoittevin B, Devalckenaere M, Patoustier N, Alexander M, Kubies D, Calberg C (2002) Polymer 43:4017
Haraguchi K, Takenisa T, Fan S (2002) Macromolecules 35:10162
Alexandre M, Dubois P (2000) Mater Sci Eng 28:1
Jiang H, Su W, Mather PT, Bunning TJ (1999) Polymer 40:4593
Chan CK, Chu IM (2001) Polymer 42:6089
Li L, Hsieh YL (2005) Nanotechnology 16:2852
Huang Y, Lu J, Xiao C (2007) Polym Degrad Stab 92:1072
Kabiri K, Azizi A, Zohuriaan-Mehr MJ, Bagheri Marandi G, Bouhendi H (2011) J Appl Polym Sci 119:2759
Yen MH, Lin KF (2009) J Polym Sci Part B Poly Phys 47:524
Ren Q, Shi TJ, Wang HL, Zhou YB, Zhai LF (2003) J Funct Polym (a Chinese Journal). doi: ISSN:1008-9357.0.2003-04-007
Liu PS, Li L, Zhou NL, Zhang J, Wei SH, Shen J (2006) J Appl Polym Sci 102:5725
Ramazani-Harandi MJ, Zohuriaan-Mehr MJ, Yousefi AA, Ershad-Langroudi A, Kabiri K (2009) J Appl Polym Sci 113:3676
Pourjavadi A, Kheirabadi M, Zohuriaan-Mehr MJ, Kabiri K (2009) J Appl Polym Sci 114:3542
Darvishi Z, Kabiri K, Zohuriaan-Mehr MJ, Morsali A (2011) J Appl Polym Sci 120:3453
Wu JH, Lin JM, Li GQ, Wei CR (2001) Polym Int 50:1050
Wu JH, Wei YL, Lin HM, Lin SB (2003) Polymer 44:6513
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Kabiri, K., Hesarian, S., Zohuriaan-Mehr, M.J. et al. Superabsorbent polymer composites: does clay always improve properties?. J Mater Sci 46, 6718–6725 (2011). https://doi.org/10.1007/s10853-011-5627-0
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DOI: https://doi.org/10.1007/s10853-011-5627-0