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    ELASTIC BANDAGES WITH IMPROVED COMFORT PROPERTIES
    (Ege Universitesi, 2016) Basal, Guldemet; Deveci, Senem Sirin
    Elastic bandage samples were produced on a crochet knitting machine utilizing some special polyester, cotton and viscose yarns. Air permeability, porosity, thermal conductivity, thermal absorbtivity, thermal resistance and water absorbency of these bandages were compared. Results revealed that air permeability depended on fabric density and porosity. Capillarity action played a significant role in water absorbency. Particularly, channeled fiber structure improved water absorbency in a great extent. Thermal conductivity was affected by fiber type and fabric density. Cotton and viscose fibers, and dense fabric structure caused high thermal conductivity. Thermal resistance showed an opposite trend. In addition, in order to improve thermal comfort characteristics of the bandages phase change material (PCM) loaded microcapsules were applied to one of bandage samples. Alambeta test results confirmed that application of PCM microcapsules improved the thermal comfort properties of bandages in some extend.
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    Preparation of PCM microcapsules by complex coacervation of silk fibroin and chitosan
    (Springer, 2009) Deveci, Senem Sirin; Basal, Guldemet
    Phase change material microcapsules were prepared by complex coacervation of silk fibroin (SF) and chitosan (CHI). n-Eicosane was used as the core material. The effects of SF/CHI ratio, and percentage of cross-linking agent and n-Eicosane content on the properties of microcapsules were studied. The size distribution and the surface morphology of microcapsules were characterized by optical and scanning electron microscopy. The encapsulation of core material was determined by energy dispersive spectrometer analysis. The results indicated that SF/CHI microcapsules were prepared successfully. Microcapsules had smooth outer surface when the ratio of SF to CHI was close to 5. On the other hand, at high SF/CHI ratios (a parts per thousand yen14), microcapsules showed a two-layer structure, an inner compact layer, and an outer, more porous, sponge-like layer. The highest microencapsulation efficiency was obtained at a SF/CHI ratio of 20 in the presence of 0.9% cross-linking agent and of 1.5% n-Eicosane content.
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    Preparation of PCM microcapsules by complex coacervation of silk fibroin and chitosan
    (Springer, 2009) Deveci, Senem Sirin; Basal, Guldemet
    Phase change material microcapsules were prepared by complex coacervation of silk fibroin (SF) and chitosan (CHI). n-Eicosane was used as the core material. The effects of SF/CHI ratio, and percentage of cross-linking agent and n-Eicosane content on the properties of microcapsules were studied. The size distribution and the surface morphology of microcapsules were characterized by optical and scanning electron microscopy. The encapsulation of core material was determined by energy dispersive spectrometer analysis. The results indicated that SF/CHI microcapsules were prepared successfully. Microcapsules had smooth outer surface when the ratio of SF to CHI was close to 5. On the other hand, at high SF/CHI ratios (a parts per thousand yen14), microcapsules showed a two-layer structure, an inner compact layer, and an outer, more porous, sponge-like layer. The highest microencapsulation efficiency was obtained at a SF/CHI ratio of 20 in the presence of 0.9% cross-linking agent and of 1.5% n-Eicosane content.
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    Properties of n-Eicosane-Loaded Silk Fibroin-Chitosan Microcapsules
    (Wiley-Blackwell, 2011) Basal, Guldemet; Deveci, Senem Sirin; Yalcin, Dilek; Bayraktar, Oguz
    PCM microcapsules containing n-eicosane were prepared by complex coacervation of silk fibroin (SF) and chitosan (CHI). Chemical characterization of microcapsules was carried out using Fourier-transform infrared (FT-IR) spectroscopy. Thermal properties and thermal stability of microencapsulated n-eicosane were determined by differential scanning calorimetry (DSC) and thermal gravimetric analysis TGA). FTIR spectra confirmed the encapsulation of n-eicosane within the microcapsules. Results from thermal analyses showed that microcapsules consisted of an average of 45.7 wt % n-eicosane, and had a thermal energy storage and release capacity of about 93.04 J/g and 89.68 J/g, respectively. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121:1885-1889, 2011