Synthesis of acid-soluble graphene and its use in producing a reduced graphene oxide–poly(benzobisoxazole) composite
Synthesis of acid-soluble graphene and its use in producing a reduced graphene oxide–poly(benzobisoxazole) composite
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DOI：
10.1039/c2jm30285c
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发表时间：
2012-05
影响因子：
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通讯作者：
Qi-Fan Zhuang;Xilong Liu;Qing Wang;Xiaoyun Liu;Jingning Zhou;Zhe‐wen Han
中科院分区：
文献类型：
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作者：
Qi-Fan Zhuang;Xilong Liu;Qing Wang;Xiaoyun Liu;Jingning Zhou;Zhe‐wen Han
以羧基化氧化石墨烯（GO）和氟化聚羟基酰胺（6 FPHA）为原料制备了一种新型的化学修饰石墨烯，后者是氟化聚苯并二恶唑（6 FPBO）的前体。结果表明，与普通GO只能在中性或碱性条件下分散于水中不同，RGO-6 FPBO（reduced graphene oxide-6 FPBO）能稳定分散于刘易斯酸中。通过将RGO-6 FPBO与聚苯并二恶唑（PBO）在甲磺酸中进行简单的溶液共混，得到了RGO-6 FPBO-PBO复合材料。所获得的RGO-6 FPBO-PBO复合膜在RGO-6 FPBO含量为4wt%时表现出电导率显著增加8个数量级，而没有显著牺牲光学透明度。当RGO-6 FPBO含量大于4wt%时，复合膜的介电常数也显著增加。RGO-6 FPBO的加入提高了复合材料的力学性能和热稳定性。
A new chemically modified graphene was prepared using carboxylated graphene oxide (GO) and fluorinated poly(hydroxyamide) (6FPHA), the latter is the precursor of fluorinated poly(benzobisoxazole) (6FPBO). The results showed that, unlike common GO, which can only be dispersed in water under neutral or basic conditions, the RGO–6FPBO (reduced graphene oxide–6FPBO) could be stably dispersed in Lewis acids. The RGO–6FPBO–poly(benzobisoxazole) (PBO) composite was achieved by simple solution blending of RGO–6FPBO and PBO in methanesulfonic acid. The obtained RGO–6FPBO–PBO composite films exhibited a dramatic increase in electrical conductivity, by 8 orders of magnitude at the RGO–6FPBO content of 4 wt%, without significantly sacrificing optical transparency. When the content of RGO–6FPBO was higher than 4 wt%, the dielectric constant of the composite film also increased remarkably. The mechanical properties and thermal stability of the composite were also improved by the incorporation of RGO–6FPBO.