**4. Conclusions**

The goal of the present work was to investigate an ecofriendly flame-retardant treatment for cellulosic fibers. An organic phosphorus monomer was immobilized onto cotton fabrics grafted with polyacrylic acid to improve tethering. Polyacrylic acid was first introduced onto the cellulosic fibers by plasma-induced grafting polymerization. FTIR, SEM, EDX, wettability and mechanical property analysis were conducted to characterize the coated fabric samples. The washing durability was also evaluated.

The important results of the study are summarized as follows:


Thus, plasma-treated cotton grafted with acrylic acid and linked with phosphorus monomer holds promising potential for firefighting applications. Further experimental investigations are, however, needed to improve the low washing fastness of the coated surfaces.

**Author Contributions:** Conceptualization, R.Z. and S.G.; methodology, R.Z.; software, S.G.; validation, R.Z. and S.G.; formal analysis, R.Z.; investigation, S.G.; resources, R.Z.; data curation, S.G.; writing—original draft preparation, R.Z and S.G.; writing—review and editing, R.Z and S.G.; visualization, S.G.; supervision, R.Z.; project administration, R.Z. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was funded by the Tunisian Ministry of Higher Education and Scientific Research in the framework of the PROJECT 18PJEC12-22.

**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.
