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首页> 外文期刊>Applied Surface Science >Deposition parameters to improve the fouling-release properties of thin siloxane coatings prepared by PACVD
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Deposition parameters to improve the fouling-release properties of thin siloxane coatings prepared by PACVD

机译：沉积参数以改善PACVD制备的薄硅氧烷涂料的结垢释放性能

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摘要

A range of SiO_x-like coatings was deposited on glass slides from a hexamethylsiloxane precursor by plasma-assisted CVD. The effect of varying deposition parameters, specifically ion cleaning time and HMDSO/O_2 ratios, on the coating properties and antifouling performance was investigated. At low HMDSO/O_2 ratios, the resulting coatings were close to SiO_2. Carbon content in the bulk of the coatings increased with increasing HMDSO/O_2 ratio. Coatings deposited at high HMDSO/O_2 ratios and with the longest cleaning time (30 min), elevated the relative carbon content to 25 atomic %. Surface energies (22-43 mJ/m) were correlated with the degree of surface oxidation and hydrocarbon content. With the exception of the most polar coatings the apolar component of the surface energy (γ~(LW)) was the dominant component. In the most hydrophilic coatings, the Lewis base component of the surface energy (γ~-) was dominant. Significantly improved antifouling performance was detected with the most reduced coatings deposited using the extended ion cleaning times. For both, the removal of sporelings of the marine green alga, Viva linza and the initial adhesion of the freshwater bacterium, Pseudomonas fluorescens, there was a strong, positive correlation between strength of attachment and ion cleaning time. Increased ion cleaning time will elevate the deposition temperature, increasing decomposition rates and thus the crosslinking of the polymer. Increased cross-linking may render these coatings less permeable to penetration and mechanical interlocking by the adhesive polymers used by these organisms, thus reducing their adhesion. Films with improved biological performance have potential for use as coatings in the control of biofouling in applications such as heat exchangers, where thin films are important for effective thermal transfer, or optical windows where transparency is important.
机译：通过等离子体辅助CVD，从六甲基硅氧烷前体在玻璃载玻片上沉积了一系列类似于SiO x的涂层。研究了不同沉积参数，特别是离子清洗时间和HMDSO / O_2比率对涂层性能和防污性能的影响。在低HMDSO / O_2比率下，所得涂层接近SiO_2。随着HMDSO / O_2比的增加，大部分涂料中的碳含量增加。以高HMDSO / O_2比例和最长的清洁时间（30分钟）沉积的涂层将相对碳含量提高到25原子％。表面能（22-43 mJ / m）与表面氧化程度和碳氢化合物含量相关。除了极性最大的涂层外，表面能的非极性成分（γ〜（LW））是主要成分。在最亲水的涂料中，表面能的路易斯碱成分占主导地位。使用延长的离子清洁时间，可以最大程度减少沉积的涂层，从而显着提高了防污性能。对于这两种方法，去除海洋绿藻的孢子和Viva linza以及淡水细菌荧光假单胞菌的初始黏附，在附着强度和离子清洗时间之间都具有很强的正相关性。离子清洁时间的增加将提高沉积温度，提高分解速率，从而提高聚合物的交联度。交联的增加可能会使这些涂层不易被这些生物使用的粘合剂聚合物渗透和渗透机械，从而降低其粘附性。具有改善的生物性能的薄膜具有潜力用作控制生物污垢的涂料，例如热交换器（其中薄膜对于有效传热很重要）或光学窗口（其中透明度很重要）等应用中。

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  • 来源
    《Applied Surface Science》 |2009年第14期|6508-6514|共7页
  • 作者

    Laurent Akesso; Parnia Navabpour; Dennis Teer; Michala E. Pettitt; Maureen E. Callow; Chen Liu; Xueju Su; Su Wang; Qi Zhao; Crtomir Donik; Aleksandra Kocijan; Monika Jenko; James A. Callow;

  • 作者单位

    TEER Coatings Ltd, West Stone House, Berry Hill Industrial Estate, Droitwich, Worcestershire, WR9 9AS, UK;

    TEER Coatings Ltd, West Stone House, Berry Hill Industrial Estate, Droitwich, Worcestershire, WR9 9AS, UK;

    TEER Coatings Ltd, West Stone House, Berry Hill Industrial Estate, Droitwich, Worcestershire, WR9 9AS, UK;

    School of Biosciences, The University of Birmingham, Birmingham B15 2TT, UK;

    School of Biosciences, The University of Birmingham, Birmingham B15 2TT, UK;

    Department of Mechanical Engineering, University of Dundee, UK;

    Department of Mechanical Engineering, University of Dundee, UK;

    Department of Mechanical Engineering, University of Dundee, UK;

    Department of Mechanical Engineering, University of Dundee, UK;

    Institute of Metals and Technology, Lepi pot 11, p.p. 431, SI-1001 Ljubljana, Slovenia;

    Institute of Metals and Technology, Lepi pot 11, p.p. 431, SI-1001 Ljubljana, Slovenia;

    Institute of Metals and Technology, Lepi pot 11, p.p. 431, SI-1001 Ljubljana, Slovenia;

    School of Biosciences, The University of Birmingham, Birmingham B15 2TT, UK;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    PACVD films; silicon oxide; biofouling; ulva linza; pseudomonas fluorescens;

    机译：PACVD膜氧化硅生物污染乌尔瓦·林扎荧光假单胞菌;

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