Thesis

Gelatin-Chitosan Edible Film with Kesum Extracts: Evaluation of Physical, Mechanical, and Antimicrobial Properties of the Film

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The utilization of edible film has gained much attention in food packaging development and
industry due to its potential to preserve food and biodegradability, which could reduce
environmental waste compared to conventional food packaging. Moreover, the application of
pure polymers has shown insufficient defense against microbial deterioration; thus, the
incorporation of plant-derived secondary active compounds into the edible film has been
extensively studied as a potential antimicrobial activity. In this study, a gelatin-chitosan
composite incorporated with Polygonum Minus Huds (Kesum) extract was developed, and its
antimicrobial, mechanical, and physical properties were evaluated. The antimicrobial activity of
the KLE and gelatin-chitosan edible film with KLE extract showed that 2% of KLE has the highest
antimicrobial activity on both S. aureus and Salmonella spp. The 2% of KLE film was evaluated
for its physical, chemical, and microstructure. The result showed that the incorporation of 2%
KLE significantly affects the mechanical and physical properties of the film. Adding 2% KLE
significantly increased the thickness, water vapor permeability (WVP), and opacity of the film,
while the film solubility (FS) decreased. For its mechanical properties, the elongation at break
(EAB) and Tensile Strength (TS) showed significant decreases with the addition of KLE, while the
Young Modulus (YM) is not significantly different compared to the control film. The SEM analysis
showed that the adding 2% KLE resulted in a heterogeneous film with uneven granule
distribution over the film’s surface and crack or pore formed within the film, while the control
film had a homogeneous film with a smooth surface. The presence of cracks and pores may be
related to the loss of mechanical and physical properties of the film. Even though there are
adverse effects on the mechanical and physical properties of the film, the 2% KLE film is still
within the acceptable range to be used as food packaging.

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Availability

Detail Information

Series Title

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Call Number

BT 23-026

Publisher

i3L, Jakarta : i3L, Jakarta., 2023

Collation

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Language

English

ISBN/ISSN

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Classification

NONE

Content Type

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Media Type

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Carrier Type

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Edition

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Subject(s)

Antimicrobial
Gelatin-chitosan edible film
Polygonum Minus Huds extract
mechanical
physical
SEM

Specific Detail Info

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Statement of Responsibility

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