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Moisture Sorption Isotherm and Isosteric Heat of Sorption Characteristics of PVP-CMC Hydrogel Film: A Useful Food Packaging Material

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Book cover Cellulose-Based Superabsorbent Hydrogels

Part of the book series: Polymers and Polymeric Composites: A Reference Series ((POPOC))

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Abstract

Hydrogels are polymeric materials possessing a three-dimensional network structure and can absorb a large quantity of liquid water. Recently, hydrogel-based polymeric materials are being focused and encouraged as they are breathable and maintain the shelf life of fresh fruit and vegetables. A hydrogel film was prepared using synthetic polymer, polyvinylpyrrolidone (PVP), and biopolymer, carboxymethyl cellulose (CMC) and agar, along with polyethylene glycol and glycerol as plasticizer to create a breathable and biodegradable film termed as “PVP-CMC” hydrogel film. In general, hydrogel film provides poor but composition- and structure-dependent moisture resistance in normal atmosphere. Further, interaction among the plasticized ingredients, which are dependent on its ultimate moisture content, controls the physical and mechanical properties of the film. Therefore, it is important to know moisture sorption characteristics of each hydrogel film. The “PVP-CMC” hydrogel film exhibited a tendency to adsorb/desorb moisture depending on environmental relative humidity and temperature during storage. Hence, the general features and the equilibrium relationship between moisture contents of “PVP-CMC” hydrogel film at different temperatures (25, 35, 45 and 55 °C) and relative humidities (≈ 10–90%) of the environment in which the film generally resides, i.e., moisture sorption isotherm (MSI), will be discussed in this chapter. The isosteric heat of sorption at different moisture contents of “PVP-CMC” hydrogel film will also be discussed.

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Acknowledgments

The authors are thankful for the support of Operational Programme Research and Development for Innovation co-funded by the European Regional Development Fund (ERDF) and the national budget of the Czech Republic within the framework of the Centre of Polymer Systems Project (reg. number: CZ.1.05/2.1.00/03.0111). Authors are also pleased to acknowledge for the partial financial support provided by the Ministry of Education, Youth and Sports of the Czech Republic – Program NPU I (LO1504).

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Authors and Affiliations

  1. Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Zlín, Czech Republic

    Nabanita Saha, Antonin Minařík & Petr Saha

  2. Department of Agricultural and Food Engineering, Indian Institute of Technology, Kharagpur, India

    Madhusweta Das & Dipali S. Shinde

Authors
  1. Nabanita Saha
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  2. Madhusweta Das
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  3. Dipali S. Shinde
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  4. Antonin Minařík
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  5. Petr Saha
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Correspondence to Nabanita Saha .

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Editors and Affiliations

  1. Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi, Bangladesh

    Md. Ibrahim H. Mondal

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Saha, N., Das, M., Shinde, D.S., Minařík, A., Saha, P. (2019). Moisture Sorption Isotherm and Isosteric Heat of Sorption Characteristics of PVP-CMC Hydrogel Film: A Useful Food Packaging Material. In: Mondal, M. (eds) Cellulose-Based Superabsorbent Hydrogels. Polymers and Polymeric Composites: A Reference Series. Springer, Cham. https://doi.org/10.1007/978-3-319-77830-3_36

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