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首页> 外文期刊>RSC Advances >Three-dimensionally interconnected porous boron nitride foam derived from polymeric foams
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Three-dimensionally interconnected porous boron nitride foam derived from polymeric foams

机译：三维互连的多孔硼氮化物泡沫衍生自聚孔泡沫

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摘要

In this work, for the first time, we report the successful synthesis of three-dimensionally interconnected porous boron nitride foams (BNFs) with a high degree of crystallinity using porous sacrificial polymeric hard templates. Ammonia borane/CTAB solution were infiltrated inside highly porous preforms of poly(styrene-co-divinylbenzene) (PS), poly(acrylonitrile-co-divinylbenzene) (PAN) and poly(ethylhexyl acrylate-co-divinylbenzene) (PEHA) made using a high internal phase emulsion process. These were later subjected to pyrolysis under an ammonia atmosphere at the rather low temperature of 1150 degrees C for 90 minutes. The obtained products were characterized using X-ray diffraction, Fourier transformed infrared spectroscopy, N-2 sorption analysis, scanning electron microscopy, scanning transmission electron microscopy and high resolution transmission electron microscopy (HR-TEM). The synthesized BNFs closely replicated and retained the open-cellular interconnected microstructure of the polymeric templates. The HR-TEM results revealed the formation of highly crystalline BN stack layers in small domains. The prepared BNF using the PS template showed superhydrophobic behavior which was typical for all of the prepared samples, with a water contact angle of similar to 144 degrees and a high adsorption capacity of 1800% for used engine oil.
机译：在这项工作中，我们首次报告了使用多孔牺牲聚合物硬模板的高度结晶度的三维互连的多孔硼氮化物泡沫（BNF）的成功合成。氨气硼烷/ CTAB溶液在聚（苯乙烯 - 共分二乙烯基苯）（PS），聚（丙烯腈 - 二二乙烯基苯）（PAN）和聚（乙基己酸酯 - 共分二乙烯基苯）（PEHA）中的高度多孔预成型件内渗透高内相乳液过程。这些后来在1150℃的相当低温下在氨气氛下进行热解90分钟。使用X射线衍射，傅里叶转化的红外光谱，N-2吸附分析，扫描电子显微镜，扫描透射电子显微镜和高分辨率透射电子显微镜（HR-TEM）的傅立叶变化分析。合成的BNFS紧密地复制并保留了聚合物模板的开口互连微结构。 HR-TEM结果表明，在小型结构域中形成高结晶BN堆叠层。使用PS模板的制备的BNF显示出所有制备样品的典型的超疏水性能，水接触角与144度相似，并且使用的发动机油的高吸附容量为1800％。

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  • 来源
    《RSC Advances》 |2016年第56期|共9页
  • 作者

    Maleki Mahdi; Shokouhimehr Mohammadreza; Karimian Hossein; Beitollahi Ali;

  • 作者单位

    Iran Univ Sci &

    Technol IUST Sch Met &

    Mat Engn Ctr Excellence Ceram Mat Energy &

    Environm Applic Tehran 16846 Iran;

    Iran Univ Sci &

    Technol IUST Sch Met &

    Mat Engn Ctr Excellence Ceram Mat Energy &

    Environm Applic Tehran 16846 Iran;

    Golestan Univ Sch Chem Engn POB 45138-15739 Gorgan Iran;

    Iran Univ Sci &

    Technol IUST Sch Met &

    Mat Engn Ctr Excellence Ceram Mat Energy &

    Environm Applic Tehran 16846 Iran;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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