Dispersions of Two-Dimensional Titanium Carbide MXene in Organic Solvents
Dispersions of Two-Dimensional Titanium Carbide MXene in Organic Solvents
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DOI：
10.1021/acs.chemmater.6b04830
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发表时间：
2017-02-28
影响因子：
8.6
通讯作者：
Gogotsi, Yury
中科院分区：
文献类型：
--
作者：
Maleski, Kathleen;Mochalin, Vadym N.;Gogotsi, Yury
二维碳化钛（Ti 3C 2 Tx）MXene在研究界引起了极大的关注，并已在许多应用中显示出前景，但以前只有其在水溶液中的分散体可用。在这里，我们表明，Ti 3C 2 Tx可以分散在许多极性有机溶剂中，但最好的分散体是在N，N-二甲基甲酰胺，N-甲基-2-吡咯烷酮，二甲亚砜，碳酸丙烯酯，和乙醇中实现的。通过测量MXene在有机溶剂中的浓度和吸收光谱以及将浓度与溶剂物理性质（例如表面张力、沸点和极性指数）相关联来检查分散体。Hildebrand和汉森溶解度参数还用于初步了解Ti 3C 2 Tx MXene在有机介质中的行为，并可能开发定量相关性，以选择可以分散Ti 3C 2 Tx和其他MXene的溶剂及其组合。使用这种分析，我们已经概述了一系列有机溶剂，可以分散Ti 3C 2 Tx，扩大加工技术的机会，例如将MXenes与其他纳米材料或聚合物混合以形成复合材料，制备用于印刷的油墨，以及需要溶液可加工材料的沉积，允许在众多应用中使用Ti 3C 2 Tx。
Two-dimensional titanium carbide (Ti3C2Tx) MXene has attracted a great deal of attention in the research community and has already showed promise in numerous applications, but only its dispersions in aqueous solutions have previously been available. Here we show that Ti3C2Tx can be dispersed in many polar organic solvents, but the best dispersions were achieved in N,N-dimethylformamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide, propylene carbonate, and ethanol. The dispersions were examined by measuring the concentration and absorbance spectra of MXene in organic solvents as well as correlating the concentration to solvent physical properties, such as surface tension, boiling point, and polarity index. Hildebrand and Hansen solubility parameters were additionally used to provide an initial understanding of how Ti3C2Tx MXene behaves in organic media and potentially develop quantitative correlations to select solvents and their combinations that can disperse Ti3C2Tx and other MXenes. Using this analysis, we have outlined a range of organic solvents, which can disperse Ti3C2Tx, expanding the opportunities for processing techniques, such as mixing MXenes with other nanomaterials or polymers to form composites, preparing inks for printing, and deposition requiring solution processable materials, allowing the use of Ti3C2Tx in a multitude of applications.