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首页> 外文期刊>RSC Advances >Preparation of novel phosphorus-nitrogen-silicone grafted graphene oxide and its synergistic effect on intumescent flame-retardant polypropylene composites
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Preparation of novel phosphorus-nitrogen-silicone grafted graphene oxide and its synergistic effect on intumescent flame-retardant polypropylene composites

机译：新型磷 - 氮硅氧烷接枝石墨烯氧化物的制备及其对膨胀型阻燃聚丙烯复合材料的协同作用

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摘要

Due to the poor dispersion in polymer matrix, graphene can hardly be used alone as a flame-retardant additive for polymers. In this paper, a novel halogen-free flame retardant - the ternary graft product of silsesquioxane, graphene oxide and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (PMGO) with a structure of graphene oxide layers modified with the synergistic flame retardant multiple elements of phosphorous, nitrogen and silicon was synthesized and then used in combination with traditional intumescent flame retardant (IFR) to enhance the flame retardancy of polypropylene (PP). The experimental results show that the thermal and flame retardant properties of flame-retardant (FR) PP composites are significantly improved by introducing 5 wt% PMGO as well as 20 wt% IFR. The peak heat release rate and total heat release of the FR PP composite are reduced 61.5% and 40.2%, respectively, compared to neat PP. Based on the char layer observation and thermal analysis, the enhancement in flame retardancy is mainly attributed to the outstanding intumescent char layers with high strength and thermal stability formed under the synergistic effect of PMGO and IFR. Besides, the introduced phosphorous, nitrogen and silicon hydrophilic groups do not show the negative effects on the surface hydrophobicity of flame retardant PP materials, which could broaden its scope of application.
机译：由于聚合物基质中的分散差，石墨烯几乎不能单独用作聚合物的阻燃添加剂。本文采用了一种新的无卤阻燃剂 - 倍半硅氧烷，石墨烯和9,10-二氢-9-氧化萘蒽 - 氧化物（PMGO）的三元接枝产物，具有改性石墨烯氧化物层的结构通过协同阻燃剂，合成磷，氮和硅的多个元素，然后与传统膨胀阻燃剂（IFR）组合使用以增强聚丙烯（PP）的阻燃性。实验结果表明，通过引入5wt％PMGO以及20wt％IFR，通过引入5wt％的PMG，显着改善了阻燃剂（FR）PP复合材料的热量和阻燃性能。与整齐PP相比，FR PP复合材料的峰值热释放速率和FR PP复合材料的总热释放分别降低了61.5％和40.2％。基于Char层观察和热分析，阻燃性的增强主要归因于在PMGO和IFR的协同作用下形成具有高强度和热稳定性的优异膨胀型炭层。此外，引入的磷，氮和硅亲水基团没有显示对阻燃PP材料的表面疏水性的负面影响，这可能扩大其应用范围。

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  • 来源
    《RSC Advances》 |2018年第63期|共12页
  • 作者

    Yuan Gaowei; Yang Bing; Chen Yinghong; Jia Yinggang;

  • 作者单位

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Polymer Res Inst Chengdu 610065 Sichuan Peoples R China;

    Northeastern Univ Coll Sci Shenyang 110819 Liaoning Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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