Antimicrobial agent-free hybrid cationic starch/sodium alginate polyelectrolyte films for food packaging materials

Ferhat Şen; İrem Uzunsoy; Emre Baştürk; Memet Vezir Kahraman

doi:10.1016/j.carbpol.2017.04.079

Antimicrobial agent-free hybrid cationic starch/sodium alginate polyelectrolyte films for food packaging materials

Carbohydr Polym. 2017 Aug 15:170:264-270. doi: 10.1016/j.carbpol.2017.04.079. Epub 2017 Apr 26.

Authors

Ferhat Şen¹, İrem Uzunsoy², Emre Baştürk³, Memet Vezir Kahraman⁴

Affiliations

¹ Marmara University, Department of Chemistry, 34722 Istanbul, Turkey; Bülent Ecevit University, Department of Food Processing, 67900 Zonguldak, Turkey.
² Bülent Ecevit University, Department of Food Processing, 67900 Zonguldak, Turkey.
³ Marmara University, Department of Chemistry, 34722 Istanbul, Turkey.
⁴ Marmara University, Department of Chemistry, 34722 Istanbul, Turkey. Electronic address: mvezir@marmara.edu.tr.

PMID: 28521996
DOI: 10.1016/j.carbpol.2017.04.079

Abstract

This study aimed to develop polyelectrolyte structured antimicrobial food packaging materials that do not contain any antimicrobial agents. Cationic starch was synthesized and characterized by FT-IR spectroscopy and ¹H NMR spectroscopy. Its nitrogen content was determined by Kjeldahl method. Polyelectrolyte structured antimicrobial food packaging materials were prepared using starch, cationic starch and sodium alginate. Antimicrobial activity of materials was defined by inhibition zone method (disc diffusion method). Thermal stability of samples was evaluated by TGA and DSC. Hydrophobicity of samples was determined by contact angle measurements. Surface morphology of samples was investigated by SEM. Moreover, gel contents of samples were determined. The obtained results prove that produced food packaging materials have good thermal, antimicrobial and surface properties, and they can be used as food packaging material in many industries.

Keywords: Antimicrobial food packaging; Cationic starch; Polyelectrolyte; Sodium alginate; Starch.