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Updated: May 28, 2026
Biomimetic Materials to Characterize Bacteria-host Interactions
Published on: November 16, 2015
Theoretical and Experimental Bacterial Adherence on Chitosan Films with Varied Characteristics
Anouar Mouhoub1, Amine Guendouz1, Zainab El Alaoui-Talibi1
1Centre d'Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech, URL-CNRST 05), Faculté des Sciences et Techniques, Université Cadi Ayyad, Marrakech 40000, Morocco.
Chitosan films with higher deacetylation degrees (DDA) exhibit enhanced antibacterial properties and reduced biofilm formation. These functional chitosan-based films show significant potential for preventing bacterial adherence and are excellent candidates for biofilm prevention applications.
Area of Science:
- Materials Science
- Biotechnology
- Microbiology
Background:
- Chitosan is a versatile biopolymer with potential applications in functional films.
- Intrinsic parameters like deacetylation degree (DDA) significantly influence chitosan film properties.
- Understanding these parameters is crucial for optimizing chitosan-based film performance.
Purpose of the Study:
- To investigate the impact of different deacetylation degrees (DDA) on chitosan-based film properties.
- To evaluate the physicochemical properties and bioactivities of fungal (FC) and crustacean (CSC) chitosan films.
- To assess the potential of these chitosan films in preventing bacterial adherence and biofilm formation.
Main Methods:
- Preparation of chitosan-based films (C-films) from fungal and crustacean chitosan with similar molecular weight but different DDAs.
- Evaluation of physicochemical properties including zeta potential, moisture, swelling, and hydrophobicity.
- Assessment of antibacterial activity against Gram-negative and Gram-positive bacteria and bacterial adherence mitigation.
Main Results:
- Deacetylation degree (DDA) positively correlated with zeta potential.
- Fungal chitosan (FC) films exhibited reduced moisture and swelling, with enhanced antibacterial activity against Gram-negative bacteria.
- Chitosan films significantly mitigated adherence of common pathogenic bacteria, with high correlation between theoretical prediction and experimental results (r = -0.89).
Conclusions:
- Chitosan films with high deacetylation degrees (DDA) demonstrate superior antibacterial efficacy and biofilm prevention capabilities.
- FC-derived C-films show promising functional properties for applications requiring bacterial resistance.
- These findings highlight the potential of high-DDA chitosan films as effective agents against biofilm formation.
