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    Investigation into the functional properties of cotton, wool, and denim textile materials finished with chitosan and the use of chitosan in textile-reinforced composites and medical textiles
    (Elsevier, 2020) Becenen N.; Erdoğan S.; Fındık E.E.
    The interest in environment-friendly production technologies has significantly increased the production of functional textile products that protect the environment and human health. In this chapter, chitosan, which is a natural biopolymer obtained from shrimp, is characterized and its antimicrobial activity against bacteria and yeast species is determined. Chitosan was coated on cotton, wool, and for the first time on denim fabrics (99% cotton and 1% elastane) to reveal how the antibacterial activity of shrimp chitosan has changed after it was coated on textile materials. The antibacterial activity against Staphylococcus aureus was investigated comparatively by qualitative and quantitative methods before and after washing. In order to improve the washing resistance of the shrimp chitosan on textile materials, chitosan-acrylic binder coatings were prepared for the first time. Chitosan can be used as a good antibacterial agent in the production of nonwashable, disposable medical textiles and skin contact textiles both alone and in composites. © 2020 Elsevier Inc.
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    An investigation on plastic matrix composite materials
    (Trans Tech Publications Ltd, 2014) Misirli C.; Becenen N.; Şahin M.
    Composite materials with plastic matrix consist of a fiber material, which is used as the core and a matrix material, which forms the volumetric majority around that fiber material. Glass fiber reinforced plastics (GRP) are polymer-based plastic matrix composites that are used in a wide range of applications. In this work, a plastic-based composite material, which is used in tractor bonnets, was produced and thermal analysis and scanning electron microscopy (SEM) analysis of fracture surfaces for this material were performed. The SEM images of the fractured surfaces of the composites showed varied extents of fiber pull-outs under tensile failure modes. The nature of interfacial adhesion was discussed on the basis of the SEM study. A good correlation was established between the SEM study and the mechanical strength properties of the composites. However, it was observed that vinyl ester resin is a more suitable matrix for tractor bonnet parts due to its higher thermal resistance compared with orthophthalic resin. © (2014) Trans Tech Publications, Switzerland.
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    A study of the effect of reinforcement's kind on the impact strength in fiber reinforced composites
    (2009) Becenen N.
    Fiber reinforced plastics are the composite materials which are obtained by adding fibers into the resin as a reinforcement material. The fiber in the composite can be in a continuous or transient form. The fiber reinforced composite materials have advantages according to the metal materials in use since the specific weights of the fiber reinforced composite materials are low and they have resistance against the corrosion, they provide heat, sound and electric isolation. In this work, the impact strengths of the composite mate rials which are formed by combining thermoset plastic matrix with the fiber-glass in sheared, weaving and felt forms are tested. The effects of the chemical structure and cure process on the impact strength of the compos ite material are searched and it is studied to determine the reinforcement's kind which provides the highest im pact strength.