Ethylenediamine Modified Graphene and Its Chemically Responsive Supramolecular Hydrogels
Ethylenediamine Modified Graphene and Its Chemically Responsive Supramolecular Hydrogels
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DOI：
10.1021/ie501448p
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发表时间：
2014-08
影响因子：
4.2
通讯作者：
Shanshan Wang;J. Wang;Wenfeng Zhang;J. Ji;Yang Li;Guoliang Zhang;Feng-bao Zhang;Xiaobin Fan
中科院分区：
文献类型：
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作者：
Shanshan Wang;J. Wang;Wenfeng Zhang;J. Ji;Yang Li;Guoliang Zhang;Feng-bao Zhang;Xiaobin Fan
在这项研究中，还原的氧化石墨烯通过简单的一锅法用乙二胺（EDA）官能化，使用乙二胺锂衍生物作为亲核试剂在50 °C下10小时。通过傅里叶变换红外光谱（FTIR）、电子能量损失谱（EELS）、X射线光电子能谱（XPS）和zeta电位来鉴定石墨烯中EDA链的存在。利用EDA修饰石墨烯的简单酰胺化反应，以及随后β-环糊精（β-CD）与带有客体结构的聚合物之间的主客体相互作用，我们还合成了一种新型的石墨烯基β-CD超分子水凝胶。通过加入竞争性客体金刚烷羧酸钠（AdCNa）或竞争性主体α-CD，得到的水凝胶表现出凝胶-溶胶转变。
In this study, reduced graphene oxide was functionalized with ethylenediamine (EDA) by a simple one-pot process, using a lithium ethylenediamine derivative as a nucleophilic reagent at 50 °C for 10 h. The presence of EDA chains in graphene was identified by Fourier transform infrared spectroscopy (FTIR), electronic energy loss spectroscopy (EELS), X-ray photoelectron spectroscopy (XPS), and zeta potential. By using the simple amidation reaction of EDA modified graphene and subsequent host–guest interactions between β-cyclodextrins (β-CDs) and polymers carrying guest moieties, we also synthesized a new type of graphene-based β-CD supramolecular hydrogels. The obtained hydrogels exhibited the gel-to-sol transition by adding a competitive guest sodium adamantine carboxylate (AdCNa) or competitive host α-CD.