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    Öğe
    From industrial waste to carbon-containing nanocomposites to obtain multifunctional properties for industrial applications
    (Elsevier, 2022) Yildiz, Aylin; Acikbas, Burcu; Atav, Riza; Dalmis, Ibrahim Savas; Bayramol, Derman Vatansever; Bugdayci, Burhan
    Helianthus annuus (sunflower) and Brassica napus (canola) are two important crops for vegetable oil industry, but their residues after harvesting cause agricultural waste. In this study, agricultural wastes of sunflower and canola were utilized as activated carbon (AC) after pyrolysing the wastes at 450 degrees C and activating with HNO3 at 90 degrees C. Obtained AC was then used to produce Fe3O4@AC nanocomposites and beta-cyclodextrin(CD):Fe3O4@AC complex structures. Structural, morphological, spectroscopic, and thermal characteristic properties of the obtained nanocomposites and complex structures were examined by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier transform infrared (FTIR) and Thermogravimetric Analysis (TGA), respectively. Produced nanocomposites and complex structures were coated onto cotton woven fabrics which were then tested for their UV protection, flame retardant and antibacterial activity. The test results of the coated fabrics and the control (uncoated cotton fabric) samples showed that Fe3O4@AC and CD:Fe3O4@AC coated fabrics showed significant UV protection, flame retardancy and antibacterial properties. Thus, the effects which would normally be obtained with 3 different finishing chemicals, each of which causes individual waste load, were achieved with a single chemical recycled from a waste. This work is critical in terms of waste management and providing a cleaner production alternative in the field of textile finishing.
  • [ X ]
    Öğe
    Inclusion complexes of ?-cyclodextrıne with Fe3O4@HA@Ag Part II: Their use in the production of PVP nanowebs
    (Inst Natl Cercetare-Dezvoltare Textile Pielarie-Bucuresti, 2023) Atav, Riza; Agirgan, Ahmet Ozgur; Yildiz, Aylin; Bayramol, Derman Vatansever; Erguenay, Ugur
    Humic acid is a material formed as a result of the degradation of animal and plant wastes, it cleans heavy metals which are industrial wastes that threaten both the environment and human health. In part I of this study, the Fe3O4@HA@Ag compound was synthesized, its inclusion complex with beta-cyclodextrin was prepared by using the kneading technique and obtained inclusion complexes were characterized. In this study, part II, nanowebs were formed from the inclusion of complex-containing polymer solution via the electrospinning method. The electrospinning solution consisted of beta-CD:Fe3O4@HA@Ag inclusion complexes at the rate of 5%, 7.5% and 10% by weight and the polyvinylpyrrolidone (PVP) polymer as the carrier. The obtained nanoweb material was characterized by instrumental methods such as SEM, FTIR, XRD, and TGA. The results obtained from FTIR, XRD and TGA revealed that beta-CD:Fe3O4@HA@Ag inclusion complexes containing nanowebs were successfully produced. The uniform fibre formation was detected from SEM images. The average fibre diameter of 5%, 7.5% and 10% beta-CD:Fe3O4@HA@Ag inclusion complex containing nanowebs were measured to be 612.5 nm, 610.8 nm and 431.2 nm, respectively.