Herein, we demonstrate a simple and versatile way for preparing stable Ti3C2Tx MXene dispersions in nonpolar organic solvents through a simultaneous interfacial chemical grafting reaction and phase transfer method. Alkylphosphonic acid ligands were chemically grafted on the hydroxyl terminal groups of Ti3C2Tx flakes at the liquid-liquid interface between water and water-immiscible organic medium to form a covalent Ti-O-P bond via interfacial nucleophilic addition and sequential condensation reaction at room temperature; the surface-functionalized Ti3C2Tx flakes concurrently migrated from the aqueous phase to the organic phase. Unlike conventional surface chemical modification methods that require many complex and tedious steps, this is a simple and easy process for fabricating a Ti3C2Tx organic dispersion in various organic solvents, from highly polar to nonpolar. The nonpolar Ti3C2Tx dispersion in chloroform also exhibits strong oxidation resistance and stable long-term storage. This approach provides an opportunity for preparing MXene nanocomposites with nonpolar polymeric matrices that are soluble in organic media for future applications such as stretchable electrode.

中文翻译：

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通过同时界面化学接枝和相转移方法对2D Ti3C2Tx MXene薄片进行非极性有机分散。

在这里，我们演示了一种通过同时进行的界面化学接枝反应和相转移方法在非极性有机溶剂中制备稳定的Ti3C2Tx MXene分散体的简单通用方法。烷基膦酸配体通过界面亲核加成和室温下的顺序缩合反应化学接枝到Ti3C2Tx薄片的羟基与水和与水不混溶的有机介质之间的液-液界面上，从而形成共价Ti-OP键。表面官能化的Ti3C2Tx薄片同时从水相迁移到有机相。与需要许多复杂且繁琐步骤的常规表面化学改性方法不同，这是一种在各种有机溶剂中制备Ti3C2Tx有机分散体的简单方法，从高极性到非极性。氯仿中的非极性Ti3C2Tx分散体还具有很强的抗氧化性和稳定的长期储存性。这种方法提供了用非极性聚合物基体制备MXene纳米复合材料的机会，该基体可溶于有机介质中以用于未来的应用，例如可拉伸电极。