Anti-bacterial efficacies and discolorations of polypropylene doped with HPQM based water solution and Neusilin

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Author list: Sributr A., Gitchaiwat A., Kositchaiyong A., Techangamvong S., Yamsaengsung W., Sombatsompop N.

Publisher: Trans Tech Publications

Publication year: 2013

Volume number: 747

Start page: 501

End page: 504

Number of pages: 4

ISBN: 9783037857717

ISSN: 1022-6680

eISSN: 1662-8985

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884794749&doi=10.4028%2fwww.scientific.net%2fAMR.747.501&partnerID=40&md5=d69c794363af2df19a61ae562200bd97

Languages: English-Great Britain (EN-GB)

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Abstract

2-Hydroxypropyl-3-Piperazinyl-Quinoline Carboxylic acid Methacrylate (HPQM), as one of the most effective anti-bacterial agents was introduced into polypropylene (PP) for the aim of anti-bacterial improvement. HPQM based water (HPQM-Solution) and HPQM based magnesium aluminometasilicate or Neusilin (HPQM-Neusilin) were supplied in the forms of liquid and solid powder, respectively. Physical appearances by means of discolorations of PP after introducing the HPQM-Solution or -Neusilin were also investigated. Halo test and the dynamic shake flask methods accompanying with plate count agar technique were used for quantitative anti-bacterial performance analyzes and the results were reported in terms of radius of inhibition zone and percentage of bacteria reduction. HPQM-Neusilin samples showed obvious and better anti-bacterial performance as compared with the HPQM-Solution samples. The results by dynamic method suggested that the anti-bacterial efficacies of the HPQM-Neusilin samples were three times higher than those of the HPQM-Solution. To achieve the 99.9% of bacteria reduction, the optimum concentration of HPQM-Solution and HPQM-Neusilin required were 7,500 and 2,500 ppm, respectively. The addition of HPQM-Neusilin considerably changed the total color difference (ΔE*), the lightness (L*) and chromatic coordinate values (a* and b* values) of the PP, the effect being less pronounced in the case of HPQM-Solution. © (2013) Trans Tech Publications, Switzerland.

Keywords

Color change, HPQM, Magnesium aluminometasilicate, Neusilin