Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume -, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1007/s12010-023-04621-8
Keywords
Biocompatibility; Chitosan; Contact angle; Wettability; Wicking time; Woven fabric
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Chitosan is used to enhance the antibacterial properties of nonwoven PET by fixing it in activated carboxyl groups and biological primary amino groups. The surface chemical compositions, biocompatibility, antibacterial, and hydrophilic properties of polyester fabrics after being grafted with chitosan and activated by atmospheric pressure plasmas were evaluated. The chitosan-coated and -activated PET woven fabric showed improved biocompatibility, wetting properties, and antibacterial properties compared to untreated PET woven fabric.
The chitosan is fixed in an amide group of activated carboxyl groups and biological primary amino groups of nonwoven PET for antibacterial properties. Uncoated materials have fewer wetting properties and are less biocompatible. The objectives of the study were to evaluate surface chemical compositions and biocompatibility, antibacterial, and hydrophilic properties of polyester fabrics grafted with chitosan oligomers and after being activated by atmospheric pressure plasmas. A 2% 14.8 mg/cm(2) uncolored PET woven fabric was dissolved in chitosan solution. Atmospheric pressure plasmas were used to activate polyester fabrics grafted with chitosan oligomers on both sides. Cell proliferation assay was performed for the biocompatibility study. The American Association of Textile Chemists and Colorists method was used to measure the width of the antibacterial zone and the Japanese Industrial Standard was used to count the number of bacterial colonies. Chitosan-coated and -activated uncolored PET woven fabric showed fewer percentage free carbon (p < 0.0001), higher percentage free oxygen to free carbon ratio (p < 0.0001), higher percentage free nitrogen to free carbon ratio (p = 0.0453), and higher percentage free oxygen plus free nitrogen to free carbon ratio (p < 0.0001) than untreated PET woven fabric. The dynamic contact angle of a water droplet and the wicking time were shorter for chitosan-coated and -activated uncolored PET woven fabric than untreated PET weaved fabric (p < 0.0001 for all). Chitosan coating leads to PET woven fabric being higher biocompatible, wettable, and antibacterial than untreated PET woven fabric.
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