Antibacterial and Structural Properties and Printability of Starch/Clay/Polyethylene Composite Films

A composite of thermoplastic starch (TPS), low-density polyethylene (LDPE) and citric acid-modified montmorillonite (CMMT) was prepared in a twin screw extruder for packaging film application. Starch was first converted to the thermoplastic state by using sorbitol and water. Composite films were pro...

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Bibliographic Details
Published inJournal of polymers and the environment Vol. 26; no. 4; pp. 1702 - 1714
Main Authors Pirooz, Majid, Navarchian, Amir H., Emtiazi, Giti
Format Journal Article
LanguageEnglish
Published New York Springer US 01.04.2018
Springer Nature B.V
Subjects
ACRYLONITRILE
Antimicrobial agents
Biodegradability
Biodegradation
Bioplastics
Calorimetry
Chemistry
Chemistry and Materials Science
Chill rolls
Citric acid
Differential scanning calorimetry
Electron microscopy
Environmental Chemistry
Environmental Engineering/Biotechnology
Fourier transforms
GRAFTS
Gravimetric analysis
Industrial Chemistry/Chemical Engineering
Infrared analysis
Low density polyethylenes
Materials Science
Montmorillonite
NANOCOMPOSITES
NANOSCIENCE AND NANOTECHNOLOGY
Original Paper
Packaging
Permeability
Polyethylene
POLYETHYLENES
Polymer Sciences
SCANNING ELECTRON MICROSCOPY
Sorbitol
STARCH
Thermal analysis
THERMAL GRAVIMETRIC ANALYSIS
Water absorption
X-RAY DIFFRACTION
Packaging film
Clay
Printability
Polyethylene
Antimicrobial property
Starch
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Summary:A composite of thermoplastic starch (TPS), low-density polyethylene (LDPE) and citric acid-modified montmorillonite (CMMT) was prepared in a twin screw extruder for packaging film application. Starch was first converted to the thermoplastic state by using sorbitol and water. Composite films were produced on a chill roll system and then were modified for printability by grafting of acrylonitrile onto the starch backbone. Antimicrobial property and printability of the films were studied from which the sample with the highest antimicrobial property and the best printability was selected. This optimal sample was then characterized by Fourier transform infrared, thermal gravimetric analysis, differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy. The composite film showed a matrix/dispersed morphology in which LDPE formed a continuous phase and TPS/CMMT nanocomposite particles appeared as dispersed phase. Biodegradability, water absorption, oxygen permeability, tensile strength and transparency of optimal film were also studied. The results indicated very good properties of the produced composite film for packaging application. Graphical Abstract
ISSN:1566-2543
1572-8919
1572-8900
DOI:10.1007/s10924-017-1056-8