Preparation and characterization of hydrophilic, spectroscopic, and kinetic properties of hydrogels based on polyacrylamide and methylcellulose polysaccharide

Authors

  • Fauze Ahmad Aouada,

    1. Department of Chemistry, Universidade Federal de São Carlos, 13560-905, São Carlos, SP, Brazil
    2. National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Instrumentation (EMBRAPA), C.P. 741, 13560-970, São Carlos, SP, Brazil
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  • Márcia Regina de Moura,

    1. Department of Chemistry, Universidade Federal de São Carlos, 13560-905, São Carlos, SP, Brazil
    2. National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Instrumentation (EMBRAPA), C.P. 741, 13560-970, São Carlos, SP, Brazil
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  • Wilson Tadeu Lopes da Silva,

    1. National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Instrumentation (EMBRAPA), C.P. 741, 13560-970, São Carlos, SP, Brazil
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  • Edvani Curti Muniz,

    1. Department of Chemistry, Universidade Estadual de Maringá, 87020-900, Maringá, PR, Brazil
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  • Luiz Henrique Capparelli Mattoso

    Corresponding author
    1. National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Instrumentation (EMBRAPA), C.P. 741, 13560-970, São Carlos, SP, Brazil
    • National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Instrumentation (EMBRAPA), C.P. 741, 13560-970, São Carlos, SP, Brazil
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Abstract

Hydrogels with potential technological applications has been prepared using polyacrylamide (PAAm) and methylcellulose (MC) polymers by free radical polymerization reaction. The spectroscopic, morphological, swelling, and kinetic properties were investigated by solid state 13C VACP-MAS nuclear magnetic resonance (NMR), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), water uptake (WU) measurements, respectively. FTIR and NMR analysis confirmed the formation of semi-IPN structured hydrogel. Data from WU and SEM revealed that the addition of MC into the solution-forming hydrogel leads to increase in average pore size and hydrophilicity. By varying of AAm, MC, pH and ionic-strength of swelling medium, it was possible to obtain hydrogels with hydrophilic properties controlled and optimized. The water uptake mechanism is dependent of the AAm concentration, which can follow the Fickian diffusion and anomalous transport process. In this way, PAAm-MC hydrogels are promising materials for technological applications, such as agricultural field. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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