Surface modification of polypropylene by grafting films for active food packaging | ||
| Egyptian Journal of Chemistry | ||
| Volume 66, Issue 9, September 2023, Pages 439-458 PDF (2.25 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2023.173356.7168 | ||
| Authors | ||
| Mohamed Aboelela1; Nahed A Abdelghany2; Maher Zaki Elsabee* 2 | ||
| 1Copack Co, 6th of October City, Industrial Area No 3, Plot 154, Giza, Egypt | ||
| 2Department of Chemistry, Faculty of Science, Cairo University | ||
| Abstract | ||
| Polypropylene (PP) films were activated by corona discharge and then successfully chemically grafted with acrylonitrile monomer (AN). The grafted PP films were subsequently hydrolyzed in alkaline medium to introduce carboxyl and amide groups. The grafted PP films were characterized by infrared spectroscopy (FTIR), elemental analysis, thermal analysis (TGA), mechanical properties, x-ray diffraction analysis (XRD), density measurement, scanning electron microscopy (SEM), swelling characteristics, and permeability properties of oxygen and water vapor (OTR and WVTR). The hydrolyzed grafted PP was immersed in an acidic solution containing both chitosan and chitosan/thiourea. The chitosan and chitosan/thiouera immobilized grafted films were characterized by FTIR, XRD, SEM, swelling characteristics, and permeability properties of oxygen and water vapor. These films' were discovered to have improved antifungal and antibacterial properties over pristine PP film. A trial was conducted to illustrate the feasibility of using these modified films for active food packaging | ||
| Keywords | ||
| Polypropylene; Chitosan; Thiourea; Acrylonitrile; Antimicrobial; Food packaging | ||
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