title: Green technology for durable finishing of viscose fibers via self-formation of AuNPs.
abstract: Sensitivity of dyes' colors to the surrounding environment causes lower durability and stability of color, which reflects the importance of durable finishing treatment. Current technique offered antimicrobial/durable finishing of viscose fibers through direct formation of AuNPs inside fibers macromolecules without using any external agents. By using the reducing properties of cellulose in viscose, Au+3was reduced to AuNPs and CHO/OH of cellulose subsequently were oxidized to COOH. For comparison, two different media were used; aqueous and alkaline. Increasing the reactivity and accessibility of cellulose macromolecules in alkali leaded to enlargement of the reduction process and more incorporation of AuNPs. Size of AuNPs inside fiber was recorded to be in range of 22-112nm and 14-100nm, in case of using aqueous and alkaline medium, respectively. Structure and properties of fibers were not changed by treatment according to XRD and ATR-FTIR data. The treated fibers were acquired durable violet color by the action of LSPR for AuNPs and darker color obtained using higher Au+3concentration. The treated fibers exhibited good inhibition against different pathogenic microbes including bacteria and fungi. One-pot, quite simple, inexpensive, green and industrial viable are the significant advantages of the current technique for viscose finishing (pigmentation and antimicrobial action).
authors.affiliation: Pretreatment and Finishing of Cellulosic Fibers, Textile Research Division, National Research Centre, Scopus affiliation ID 60014618, 33 EL Buhouth St., Dokki, Giza 12311, Egypt. Electronic address: hossamelemam@yahoo.com.
authors.forename: Hossam E
authors.initials: HE
authors.lastname: Emam
authors.affiliation: Dyeing, Printing and Auxiliaries Department, Textile Research Division, National Research Centre, Scopus affiliation ID 60014618, 33 EL Buhouth St., Dokki, Giza 12311, Egypt.
authors.forename: Nancy S
authors.initials: NS
authors.lastname: El-Hawary
authors.affiliation: Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan, Cairo 11795, Egypt. Electronic address: hananbasiony@gmail.com.
authors.forename: Hanan B
authors.initials: HB
authors.lastname: Ahmed
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D002482:Cellulose / Q000737:chemistry* / Q000494:pharmacology; D003116:Color; D004926:Escherichia coli / Q000187:drug effects; D006046:Gold / Q000737:chemistry*; D055772:Green Chemistry Technology; D055595:Mechanical Phenomena; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology; D010084:Oxidation-Reduction; D010316:Particle Size; D013211:Staphylococcus aureus / Q000187:drug effects
chemical_list: D000890:Anti-Infective Agents; D006046:Gold; D002482:Cellulose; C012024:rayon, purified
keywords: Antimicrobial fibers; AuNPs; Coloration; Durable; In-situ; Viscose