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Optimization of Physical and Mechanical Properties of an Active Film of PLA/EEP by a Full Factorial Design
Author(s) -
Nacera Chibani,
Nadjet Ardjoum,
Hocine Djidjelli,
Boukerrou Amar
Publication year - 2021
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.202000257
Subject(s) - propolis , factorial experiment , absorption of water , materials science , lactic acid , modulus , composite material , antimicrobial , elastic modulus , absorption (acoustics) , mathematics , food science , chemistry , organic chemistry , bacteria , statistics , biology , genetics
The objective of this work is to develop an active food packaging material based on poly (lactic acid) and ethanolic extracts propolis. Poly(lactic acid)/ethanolic extract propolis films are prepared by casting, using a three level full factorial design that allowed to study the parameters influencing Young's modulus and water absorption. Many experiments are carried out, with a suitable choice of two variables, leading to a mathematical model in the form of a first degree polynomial. The films are subjected to several analyzes: physical and mechanical properties and antibacterial activity. The results show that the optimal film is obtained with an amount of 14% w/w of ethanolic extracts propolis, giving an antimicrobial food packaging material with the following characteristics: amount of propolis extract: 0.14 g, Young's modulus: 1594.16 N mm −2 , water absorption rate: 3%, breaking stress: 29.45% and elongation at break: 39.27%.