**4. Conclusions**

During this study, cinnamon oil was encapsulated using the coacervation technique and immobilized on the cotton fabrics.

Various characterization methods have allowed the evaluation of the microcapsules morphology and the efficiency of their grafting on the cellulosic fibers. Furthermore, mechanical properties and air permeability of different samples were tested. Washing durability was also evaluated. Finally, the resistance of treated fabric to bacteria growth was assessed using a qualitative method on gram-positive and gram-negative bacteria strains. Cotton grafting with chitosan-essential oil microcapsules was found to be a promising finishing process for the development of bio functional textile materials. Besides, essential oil appears as an interesting safe antibacterial agent.

**Author Contributions:** Conceptualization, A.B. (Aicha Bouaziz), D.D. and S.G.; methodology, A.B. (Aicha Bouaziz), D.D. and S.G.; experiments, A.B. (Aicha Bouaziz), D.D., S.G. and A.Z.; validation, H.M., C.B. and A.B. (Aghleb Bartegi); analysis, A.B. (Aicha Bouaziz), D.D., S.G., A.Z. and H.M.; investigation, A.B. (Aicha Bouaziz), D.D. and S.G.; resources, C.B. and H.M.; writing original draft preparation, A.B. (Aicha Bouaziz), D.D., S.G. and H.M.; writing review and editing A.B. (Aicha Bouaziz), D.D., S.G. and H.M.; supervision, A.B. (Aghleb Bartegi), H.M. and C.B.; project administration, S.G. and C.B. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Data sharing is not applicable to this article.

**Conflicts of Interest:** The authors declare no conflict of interest.
