Page 38 - Book of Abstracts

th
8 Biannual Conference on Chemistry - CHEM 08

Carboxymethyl Cellulose/chitosan Biguanidine

Hydrochloride Binary Composite Edible Films for Active
Food Packaging

Hend E. Salama*, Mohamed S. Abdel Aziz
Department of Chemistry, Faculty of Science, Cairo University.

ABSTRACT

Novel carboxymethyl cellulose (CMC)/ chitosan biguanidine
hydrochloride (CBg) binary composite edible films were prepared with

different CBg contents (0wt%, 10wt%, 30wt%, and 50wt%). FTIR
confirmed the successful preparation of the films. Water vapour
permeability was gradually reduced with increasing the CBg content
while the tensile testing showed an increase of both tensile strength and

elongation at break upon increasing the CBg content. Films tend to be
yellowish while no significant change in the total color difference was

observed in presence of CBg. Antibacterial study against both Gram-
positive bacteria and Gram-negative bacterium showed no inhibition for
CMC alone while a significant inhibition was observed for CMC/CBg
films. CMC/CBg films were applied to tomato fruits, and it’s observed that

the mass loss was significantly reduced with CBg increasing while the
surface spoilage of the coated tomato fruits was inhibited during the
storage period. The obtained results verify that CMC/CBg could be

potentially used as edible films for food and fruit preservation.

Keywords: Carboxymethyl cellulose, Edible films, Chitosan biguanidine
hydrochloride.

BOOK OF ABSTRACTS CHEM 08 (2020) Page 37