利用含有氨基和羧基官能团的多肽原位掺杂聚苯胺,在聚苯胺的表面引入游离的氨基,再通过氨基与氧化石墨烯表面羧基的酰胺化反应使聚苯胺与氧化石墨烯通过共价键结合形成共价复合物。利用傅里叶变换红外光谱仪、热重分析仪、场发射扫描电子显微镜、透射电子显微镜和高倍透射电子显微镜对共价复合物进行了表征。研究结果表明,共价键能够提高复合物的稳定性,共价键还能够影响其超分子结构。
The covalent attachment of copolypeptide-doped polyaniline (PANI) nanofibers onto graphene oxide (GO) sheets in an aqueous medium was investigated for the first time.The copolypeptide,comprising of glutamic acid (Glu) and lysine (Lys) units,was in situ doped into PANI by the free carboxylic groups of Glu segments.Copolypeptide-doped PANI was covalently attached onto the GO surface through simple amidation.Characterization techniques,including fourier transform infrared spectroscopy,thermogravimetry analysis,field emission scanning electron microscopy,transmission electron microscopy and high-power transmission electron microscopy,indicated that the successful binding of copolypeptide-doped PANI nanofibers to GO.Covalent bonds can improve the stability of the proposed hybrid nanomaterial,and can also affect the supramolecular structure of the material.
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