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The preparation of fully bio-based flame retardant poly(lactic acid) composites containing casein

机译：含有酪蛋白的完全生物基阻燃聚（乳酸）复合材料的制备

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摘要

In this work, a bio-based flame retardant, casein, was incorporated into poly(lactic acid) (PLA) matrix by melt compounding in order to improve the fire resistance and sustain the biodegradable character of PLA simultaneously. The fire performance of PLA composites was evaluated by limiting oxygen index, UL-94 vertical burning, and cone calorimeter tests, respectively. The results indicated that the introduction of 20% casein increased the limiting oxygen index value of PLA composites from 20.0% to 32.2%, upgraded the UL-94 rating from no rating to V-0, and decreased the peak heat release rate from 779 to 639 kW/m(2). The decomposition products of PLA composites were analyzed by Fourier transform infrared, and the morphology of the char after combustion was observed by scanning electron microscopy. It was suggested that casein took effects in both gas phase by releasing non-flammable gases (such as NH3 and H2O) and condensed phase by the formation of protective char layers. However, the presence of casein in PLA induced an unavoidable deterioration in the mechanical performance. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46599.
机译：在这项工作中，通过熔融配合将生物基阻燃剂，酪蛋白掺入聚（乳酸）（PLA）基质中，以提高耐火性并同时维持PLA的可生物降解性。通过限制氧指数，UL-94垂直燃烧和锥形量热计测试来评估PLA复合材料的火灾性能。结果表明，20％酪蛋白的引入增加了PLA复合材料的限制氧指数值，从20.0％到32.2％，从无额定值到V-0的UL-94评级升级，并降低了779的峰值热释放率。 639 kW / m（2）。通过傅里叶变换红外分析PLA复合材料的分解产物，通过扫描电子显微镜观察燃烧后的焦炭的形态。有人建议酪蛋白通过形成保护性炭层通过释放不易燃气体（例如NH 3和H 2 O）和冷凝相中而作用。然而，在PLA中存在酪蛋白在机械性能下诱导不可避免的劣化。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46599。

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  • 来源
    《Journal of Applied Polymer Science》 |2018年第34期|共9页
  • 作者

    Zhang Sheng; Jin Xiaodong; Gu Xiaoyu; Chen Chen; Li Hongfei; Zhang Zongwen; Sun Jun;

  • 作者单位

    Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Xinyang Normal Univ Xinyang City 464000 Henan Peoples R China;

    Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    biodegradable; flame retardance; proteins;

    机译：可生物降解;阻燃;蛋白质;

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