title: Surface modification of electrospun polyester nanofibers with cyclodextrin polymer for the removal of phenanthrene from aqueous solution.
abstract: Surface modified electrospun polyester (PET) nanofibers with cyclodextrin polymer (CDP) were produced (PET/CDP). CDP formation onto electrospun PET nanofibers was achieved by polymerization between citric acid (CTR, crosslinking agent) and cyclodextrin (CD). Three different types of native CD (α-CD, β-CD and γ-CD) were used to form CDP. Water-insoluble crosslinked CDP coating was permanently adhered onto the PET nanofibers. SEM imaging indicated that the nanofibrous structure of PET mats was preserved after CDP surface modification process. PET/CDP nanofibers have shown rougher/irregular surface and larger fiber diameter when compared to untreated PET nanofibers. The surface analyses of PET/CDP nanofibers by XPS elucidated that CDP was present on the fiber surface. DMA analyses revealed the enhanced mechanical properties for PET/CDP where PET/CDP nanofibers have shown higher storage modulus and higher glass transition temperature compared to untreated PET nanofibers. The surface area of the PET/CDP nanofibers investigated by BET measurements showed slight decrease due to the presence of CDP coating compared to pristine PET nanofibers. Yet, it was observed that PET/CDP nanofibers were more efficient for the removal of phenanthrene as a model polycyclic aromatic hydrocarbon (PAH) from aqueous solution when compared to pristine PET nanofibers. Our findings suggested that PET/CDP nanofibers can be a very good candidate as a filter material for water purification and waste treatment owing to their very large surface area as well as inclusion complexation capability of surface associated CDP.
authors: UNAM-Institute of Materials Science & Nanotechnology, Bilkent University, Ankara 06800, Turkey.
authors: Fatma
authors: F
authors: Kayaci
authors: Zeynep
authors: Z
authors: Aytac
authors: Tamer
authors: T
authors: Uyar
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D003505:Cyclodextrins / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D010616:Phenanthrenes / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry*; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D047391:alpha-Cyclodextrins / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry; D047408:gamma-Cyclodextrins / Q000737:chemistry
chemical_list: D003505:Cyclodextrins; D010616:Phenanthrenes; D011091:Polyesters; D014874:Water Pollutants, Chemical; D047391:alpha-Cyclodextrins; D047392:beta-Cyclodextrins; C041953:cyclodextrin polymer; D047408:gamma-Cyclodextrins; C031181:phenanthrene; D002482:Cellulose; C031215:betadex; C023792:gamma-cyclodextrin; C032613:alpha-cyclodextrin
keywords: Cyclodextrin polymer; Electrospinning; Nanofibers; Phenathrene; Polyester