Akademik Veri Yönetim Sistemi
CHEMTECH '16, IV. International Chemical Engineering and Technologies Conference, İstanbul, Türkiye, 17 - 19 Kasım 2016, ss.65-66
In recent years, polymer nanocomposite materials have attracted the interest of a number of researchers; due
to their properties derived from several components. Polymer nanocomposites can offer significant
improvements compared to neat polymers such as enhancement of elasticity and tensile strength, as well as
antibacterial, thermal, electrical and gas barrier properties. Metal-organic frameworks (MOFs) represent a new
class of porous crystalline materials for which it is possible to design organic linkers and inorganic joints. As a
new type of porous crystalline materials, MOFs have received huge attention in the past decade due to their
unique properties, i.e. huge surface area, high porosity, low density, controllable structure and tunable pore size
[1]. Zeolitic imidazolate frameworks (ZIFs) are a subclass of MOFs that are porous hybrid materials with structures
analogous to zeolites that are built upon 4-connected nets of tetrahedral units, wherein metal ions, such as Zn2+
or Co2+, are linked through N atoms in ditopic imidazolate anions [2-4]. ZIFs which are a new type of porous
materials, possess several remarkable properties, such as controllable structures, adjustable pore size, enormous
specific surface area, and particularly good hydrothermal stability. ZIF-8, one of the most widely studied ZIFs
made by zinc ions coordinated by four imidazolate rings [4].
The aim of this study was to synthesize and investigate the polyurethane/ZIF-8 (PU/ZIF-8) coated fabric with
unique properties, including water vapor permeability and antibacterial activity. Coated fabric is “a textile fabric”
on which there has been formed in situ, on one or both surfaces, a layer or multilayer of adherent coating
material. Coated fabric is material composed of two or more layers, at least one of which is a polyester based
textile fabric and at least one of which is a substantially continuous polymeric layer [5]. PU was used a polymer
layer of coated fabric widely. As a result of their many benefits, MOFs appear to be excellent candidates for
biomedical applications. The antimicrobial activity of MOFs can result from the guests incorporated in the particle
voids or properties of the metal component in the framework [6]. A zeolitic imidazolate framework, ZIF-8, was
prepared via a variety of synthesis routes: solvothermal, microwave-assisted, sonochemical, mechanochemical,
dry-gel, and microfluidic methods [7]. In this paper, ZIF 8 was successfully synthesized under room temperature
by using solvothermal synthesis route and characterized in terms of structure, adsorption isotherms and surface
area by scanning electron microscopy, FT-IR spectroscopy and BET analysis. The mixture of PU/ZIF-8 nacomposite
with % 1 ZIF-8 content was prepared in dimethyl formamid as a solvent and coated on polyester fabric using
indirect transfer coating method. After preparing PU/ZIF-8 coated fabric, different mechanical tests such as
tensile strength, tear strength, accelerated life, water penetration and water vapor permeability tests were
performed. Also, antibacterial activities of PU/ZIF-8 nanocomposite coated polyester fabrics were tested against
Gram-positive Staphylococcus aureus (S. aureus, ATCC 25923) according to ISO 22196:2011 test method. It was
found that PU/ZIF-8 nanocomposite coated polyester fabrics have antibacterial and good mechanical stability.