title: Towards multifunctional cellulosic fabric: UV photo-reduction and in-situ synthesis of silver nanoparticles into cellulose fabrics.
abstract: Herein, the highly multifunctional cotton fabric surfaces were designed with excellent coloration, UV-protection function, and antimicrobial activity. These multifunctional functions were developed by in-situ synthesis of silver nanoparticles (Ag NPs) into the cotton fabric surface using a simple green one-pot "UV-reduction" method. Cotton fabrics were pretreated with non-anionic detergent, immersed into alcoholic silver nitrate solution (concentration ranging from 100 to 500ppm), squeezed to remove excess solution and then exposed to UV-irradiation (range 320-400nm) for 1h. The influence UV-irradiation on the thermal, chemical, optical and biological properties of the cotton fabric surface was discussed in details. The UV-irradiation promotes reducing of Ag+ions and the cotton fabrics act as seed medium for Ag NPs formation by "heterogeneous nucleation". Increasing Ag+concentration (from 100 to 500ppm) results in Ag NPs of particle size (distribution) of 50-100nm. Interestingly, the Ag NPs exhibited different localized surface Plasmon resonance properties causing a coloration of the cotton fabrics with different color shades ranging from bright to dark brown with excellent color fastness properties. The treated cotton fabrics also show high protecting functions against UV-transmission (reduction of 65%) and Escherichia coli growth (99%). The side-effects of the UV-reduction process are further investigated.
authors.affiliation: Department of Pretreatment and Finishing of Cellulosic Fibers, Textile Research Division, National Research Centre, 33 El-Behouth Street, Dokki, Giza 12311, Egypt; Fraunhofer Institute for Manufacturing Technology and Applied Materials Research (IFAM), Wiener Street 12, D-28359 Bremen, Germany. Electronic address: rehan_nrc@yahoo.com.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Rehan
authors.affiliation: Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium; Institut Européen des Membranes, UMR 5635 Université Montpellier CNRS ENSCM, Place Eugene Bataillon, F-34095 Montpellier Cedex 5, France; Chemistry Department, Faculty of Science, Helwan University, 11795 Helwan, Cairo, Egypt. Electronic address: chem_brhom@hotmail.com.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Barhoum
authors.affiliation: Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
authors.forename: Guy
authors.initials: G
authors.lastname: Van Assche
authors.affiliation: Universiteit Grenoble Alpes, LGP2, 38000 Grenoble, France; CNRS, LGP2, 38000 Grenoble, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Dufresne
authors.affiliation: Fraunhofer Institute for Manufacturing Technology and Applied Materials Research (IFAM), Wiener Street 12, D-28359 Bremen, Germany.
authors.forename: Linda
authors.initials: L
authors.lastname: Gätjen
authors.affiliation: Fraunhofer Institute for Manufacturing Technology and Applied Materials Research (IFAM), Wiener Street 12, D-28359 Bremen, Germany.
authors.forename: Ralph
authors.initials: R
authors.lastname: Wilken
mesh_terms: D002482:Cellulose / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology / Q000528:radiation effects; D032561:Cotton Fiber; D004926:Escherichia coli / Q000187:drug effects; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry; D013211:Staphylococcus aureus / Q000187:drug effects; D013784:Textiles; D014466:Ultraviolet Rays
chemical_list: D012834:Silver; D002482:Cellulose
keywords: In-situ silver nanoparticles; Multi-function cotton fabric; UV photo-reduction