2D transition metal carbides and nitrides called “MXene” are recent exciting additions to the 2D nanomaterials family. The high electrical conductivity, specific capacitance, and hydrophilic nature of MXenes rival many other 2D nanosheets and have made MXenes excellent candidates for diverse applications including energy storage, electromagnetic shielding, water purification, and photocatalysis. However, MXene nanosheets degrade relatively quickly in the presence of water and oxygen, imposing great processing challenges for various applications. Here, a facile solvent exchange (SE) processing route is introduced to produce nonoxidized and highly delaminated Ti₃C₂T_x MXene dispersions. A wide range of organic solvents including methanol, ethanol, isopropanol, butanol, acetone, dimethylformamide, dimethyl sulfoxide, chloroform, dichloromethane, toluene, and n‐hexane is used. Compared to known processing approaches, the SE approach is straightforward, sonication‐free, and highly versatile as multiple solvent transfers can be carried out in sequence to yield MXene in a wide range of solvents. Conductive MXene polymer composite fibers are achieved by using MXene processed via the solvent exchange (SE) approach, while the traditional redispersion approach has proven ineffective for fiber processing. This study offers a new processing route for the development of novel MXene‐based architectures, devices, and applications.

中文翻译：

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对导电复合纤维进行稳定 MXene 分散体的简便溶液加工。

被称为“MXene”的二维过渡金属碳化物和氮化物是二维纳米材料家族中最新令人兴奋的新成员。MXene 的高电导率、比电容和亲水性可与许多其他 2D 纳米片相媲美，并使 MXene 成为储能、电磁屏蔽、水净化和光催化等多种应用的绝佳候选者。然而，MXene 纳米片在水和氧气存在下降解相对较快，这给各种应用带来了巨大的加工挑战。在此，引入了一种简便的溶剂交换（SE）加工路线来生产非氧化且高度分层的Ti ₃ C ₂ T _x MXene分散体。使用多种有机溶剂，包括甲醇、乙醇、异丙醇、丁醇、丙酮、二甲基甲酰胺、二甲亚砜、氯仿、二氯甲烷、甲苯和正己烷。与已知的加工方法相比，SE 方法简单、无需超声处理且用途广泛，因为可以按顺序进行多种溶剂转移，以在多种溶剂中产生 MXene。导电 MXene 聚合物复合纤维是通过使用溶剂交换 (SE) 方法加工的 MXene 来实现的，而传统的再分散方法已被证明对于纤维加工是无效的。这项研究为开发基于 MXene 的新型架构、设备和应用提供了一条新的处理途径。