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Silver zeolite-loaded silicone elastomers: a multidisciplinary approach to synthesis and antimicrobial assessment

机译：加载银沸石的硅氧烷弹性体：用于合成和抗微生物评估的多学科方法

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摘要

A multidisciplinary approach has been applied to the preparation of antibacterial Ag zeolite/silicone elastomer composites aimed at products that satisfy a range of requirements, namely good mechanical properties after zeolite incorporation and strongly antibacterial. Zeolite X was synthesised and used as antibacterial agent after ion-exchange with silver. The high level of silver (14 wt%) within the zeolite enabled the preparation of antibacterial composites containing a relatively low level of zeolite (2 wt%). The composites showed strong efficacy against Escherichia coli and Staphylococcus epidermidis. Organic functionalization of the zeolite with organo-silanes prior blending with the matrix usefully improved composite mechanical properties and reduced color development in Ag zeolite containing silicone elastomers. Organo-silane modification did not substantially affect the antibacterial performance of the materials; the number of viable cells of both Gram-positive and Gram-negative bacteria was reduced to beyond detection limits within 24 hours of incubation. Efficacy of the Ag zeolite containing composites against the yeast Candida albicans was found to be substantially less than observed with the two bacteria. This study demonstrates that evaluation of polymer composites needs to be performed via a multidisciplinary approach in order to avoid compromising a particular aspect of the materials' design, characteristics or performance, including the use of reliable testing methods to determine the latter.
机译：多学科方法已应用于抗菌Ag沸石/硅氧烷弹性体复合材料的制备，其旨在满足一系列要求的产品，即沸石掺入和强抗菌后的良好机械性能。合成沸石X并用银与银离子交换后用作抗菌剂。沸石内的高水平的银（14wt％）使得制备含有相对低水平的沸石（2wt％）的抗菌复合材料。复合材料对大肠杆菌和葡萄球菌表皮表现出强烈的疗效。具有有机硅烷的沸石的有机官能化与基质有用改善的复合力学机械性能和含有硅氧烷弹性体的Ag沸石中的显着显色。有机硅烷改性并未影响材料的抗菌性能;革兰氏阳性和革兰氏阴性细菌的可活细胞数量减少到超出孵育后24小时内的检测限。发现含有复合材料对酵母念珠菌的效果的功效基本上比用两种细菌观察到。本研究表明，需要通过多学科方法进行聚合物复合材料的评估，以避免材料的设计，特性或性能的特定方面，包括使用可靠的测试方法来确定后者。

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  • 来源
    《RSC Advances》 |2015年第51期|共8页
  • 作者

    Belkhair Sama; Kinninmonth Malcolm; Fisher Leanne; Gasharova Biliana; Liauw Christopher M.; Verran Joanna; Mihailova Boriana; Tosheva Lubomira;

  • 作者单位

    Manchester Metropolitan Univ Fac Sci &

    Engn Manchester M1 5GD Lancs England;

    Manchester Metropolitan Univ Fac Sci &

    Engn Manchester M1 5GD Lancs England;

    Manchester Metropolitan Univ Fac Sci &

    Engn Manchester M1 5GD Lancs England;

    Karlsruhe Inst Technol Inst Photon Sci &

    Synchrotron Radiat D-76021 Karlsruhe Germany;

    Manchester Metropolitan Univ Fac Sci &

    Engn Manchester M1 5GD Lancs England;

    Manchester Metropolitan Univ Fac Sci &

    Engn Manchester M1 5GD Lancs England;

    Univ Hamburg Mineral Petrog Inst D-20146 Hamburg Germany;

    Manchester Metropolitan Univ Fac Sci &

    Engn Manchester M1 5GD Lancs England;

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  • 正文语种 eng
  • 中图分类 化学;
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