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首页> 外文期刊>Environmental Science & Technology >Release of Nanoclay and Surfactant from Polymer-Clay Nanocomposites into a Food Simulant
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Release of Nanoclay and Surfactant from Polymer-Clay Nanocomposites into a Food Simulant

机译：将纳米粘土和表面活性剂从聚合物粘土纳米复合材料释放到食品模拟物中

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摘要

Release assessment of organo-modified mont- morillonite (O-MMT) nanoclay and the organo-modifiers (surfactants) was performed on two types of polymer-clay nanocomposites: polypropylene (PP) and polyamide 6 (PA6) with O-MMT. In accordance with ASTM D4754-11, nano- composite films were exposed to ethanol as a fatty-food simulant at 70 ℃. The release of O-MMT, with Si and Al used as the nanoclay markers, was evaluated by graphite furnace atomic absorption spectrometry. The nanoclay particles released in ethanol were visualized by transmission electron microscopy (TEM). More nanoclay particles were released from PP-day films (0.15 mg L~(-1)) than from PA6-day films (0.10 mg L~(-1)), possibly due to the lack of interaction between the nanoclay and PP as indicated by the structure and morphology in the TEM images. The surfactant release was quantified by a liquid chromatography tandem mass spectrometry (LC-MS/MS) method. A substantial amount of surfactant was released into ethanol (3.5 mg L~(-1) from PP-day films and 16.2 mg L~(-1) from PA6-clay films), indicating changes in the nanoclay structure within the nanocomposite while it was exposed to ethanol. This research has provided information for the determination of exposure doses of nanoclay and surfactant in biosystems and the environment, which enabled the risk assessment.
机译：在两种类型的聚合物-粘土纳米复合材料上进行了有机改性的蒙脱土（O-MMT）纳米粘土和有机改性剂（表面活性剂）的释放评估：聚丙烯（PP）和具有O-MMT的聚酰胺6（PA6）。根据ASTM D4754-11，将纳米复合膜在70℃下暴露于乙醇中作为脂肪食物模拟物。通过石墨炉原子吸收光谱法评估了以Si和Al为纳米粘土标记的O-MMT的释放。通过透射电子显微镜（TEM）观察在乙醇中释放的纳米粘土颗粒。 PP天膜（0.15 mg L〜（-1））比PA6天膜（0.10 mg L〜（-1））释放出更多的纳米粘土颗粒，这可能是由于纳米粘土与PP之间缺乏相互作用所致。由TEM图像的结构和形态表示。通过液相色谱串联质谱法（LC-MS / MS）对表面活性剂的释放进行定量。大量的表面活性剂被释放到乙醇中（PP-day膜中为3.5 mg L〜（-1），PA6-粘土膜中为16.2 mg L〜（-1）），表明纳米复合材料中的纳米粘土结构发生了变化。暴露于乙醇。这项研究为确定生物系统和环境中纳米粘土和表面活性剂的暴露剂量提供了信息，从而可以进行风险评估。

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  • 来源
    《Environmental Science & Technology》 |2014年第23期|13617-13624|共8页
  • 作者

    Yining Xia; Maria Rubino; Rafael Auras;

  • 作者单位

    School of Packaging, Michigan State University, East Lansing, Michigan 48824-1226, United States;

    School of Packaging, Michigan State University, East Lansing, Michigan 48824-1226, United States;

    School of Packaging, Michigan State University, East Lansing, Michigan 48824-1226, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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