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Author: search.filters.author.Sriseubsai, WipooSubject: search.filters.subject.Antibacterial

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    Antibacterial and mechanical properties of the TiO2/ABS composites
    (2017-01-01)
    Sangkatip, Rittichai
    ;
    Sriseubsai, Wipoo
    ;
    Kiatkittipong, Kunlanan
    The aim of this present work is to enhance photoantibacterial performance on a surface of Acrylonitrile-Butadiene-Styrene (ABS) by mixing titanium dioxide (TiO<inf>2</inf>). The influences of different ratios for TiO<inf>2</inf> under UV light irradiation were investigated according to JIS Z 2801: 2010 standard. 0.5%, 1% and 2% TiO<inf>2</inf>/ABS were formed by melting process with internal mixer and compression molding process. E.coli were chosen as a model of bacteria. The best photoantibacterial activity was provided by 0.5% TiO<inf>2</inf>/ABS. The result showed that E.coli could reduce up to 46.95%. However, a higher amount of TiO<inf>2</inf> (i.e., 1% and 2% TiO<inf>2</inf>/ABS) obstructed the reaction, and E.coli was reduced to 42.6% and 36.08%, respectively. This was due to its aggregation observed from SEM image. For mechanical properties for TiO<inf>2</inf>/ABS, The results showed that tensile modulus and tensile strength of blending TiO<inf>2</inf> at 0.5 %wt was the highest but the tensile was decreased when increasing TiO<inf>2</inf> in polymer blended.
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    Preparation and characterization of the Na2Ti3O7: ABS/Na2Ti3O7 composites
    (2017-01-01)
    Sangkatip, Rittichai
    ;
    Sriseubsai, Wipoo
    ;
    Kiatkittipong, Kunlanan
    Titanate Ribbon (Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf>) used in ABS plastic was synthesized to study the mechanical properties and to conduct test on the E-coli bacteria inhibition performance. The polymer blends of ABS/Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf> by Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf>, was synthesized through alkaline hydrothermal reaction with 0.5 grams of titanium dioxide as a precursor with 20 ml. of sodium hydroxide (NaOH) at the concentration of 10 molar under the alkalinity at 200°c for 24 hours. The study on the microstructure by scanning electron microscope revealed that the Layered structure was shaped as a complete ribbon. The mechanical testing activities on the E-coli bacteria inhibition polymer mixed ABS/Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf>; it was found that the mechanical properties for ABS/Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf>, The results showed that tensile modulus and tensile strength of blending Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf> at 0.5 %wt was the highest. The result showed that E.coli could reduce up to 66.01%.