Aqueous Phase Exfoliation of Two-Dimensional Materials Assisted by Thermoresponsive Polymeric Ionic Liquid and Their Applications in Stimuli-Responsive Hydrogels and Highly Thermally Conductive Films,ACS Applied Materials & Interfaces

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Aqueous Phase Exfoliation of Two-Dimensional Materials Assisted by Thermoresponsive Polymeric Ionic Liquid and Their Applications in Stimuli-Responsive Hydrogels and Highly Thermally Conductive Films
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-12 00:00:00 , DOI: 10.1021/acsami.7b15712
Xiongwei Wang ₁ , Peiyi Wu _{1,

2}

Affiliation

With the increasing attention for various two-dimensional (2D) materials in recent years, developing a universal, facile, and eco-friendly method to exfoliate them into single- and few-layered nanosheets is becoming more and more urgent. Herein, we use a thermoresponsive polymeric ionic liquid (TRPIL) as a universal polymer surfactant to assist the high-efficiency exfoliation of molybdenum disulfide (MoS₂), graphite, and hexagonal boron nitride in an aqueous medium through consecutive sonication. In this case, the reliable interaction between 2D materials and the TRPIL would facilitate the exfoliation and simultaneously achieve a noncovalent functionalization of the exfoliated nanosheets. Interestingly, the dispersion stability of exfoliated nanosheet suspensions can be reversibly tuned by temperature because of the thermoresponsive phase transition behavior of the TRPIL. As a proof of potential applications, a temperature and photo-dual-responsive TRPIL/MoS₂ coloring hydrogel with robust mechanical property and an artificial nacre-like BN nanosheet film with high thermal conductivity were fabricated.

中文翻译：

热响应性聚合物离子液体辅助的二维材料的水相剥落及其在刺激响应水凝胶和高导热膜中的应用

近年来，随着对各种二维（2D）材料的关注日益增加，开发一种通用，简便且环保的方法来将它们剥落成单层和几层纳米片变得越来越迫切。本文中，我们使用热响应性聚合物离子液体（TRPIL）作为通用聚合物表面活性剂，以帮助高效剥离二硫化钼（MoS ₂），石墨和六方氮化硼在水性介质中通过连续超声处理。在这种情况下，二维材料和TRPIL之间的可靠相互作用将促进剥离并同时实现剥离纳米片的非共价官能化。有趣的是，由于TRPIL的热响应相变行为，可以通过温度可逆地调节剥离的纳米片悬浮液的分散稳定性。作为潜在应用的证明，制造了具有强大机械性能的温度和光敏双反应型TRPIL / MoS ₂着色水凝胶，以及具有高导热率的人造珍珠质BN纳米片薄膜。

更新日期：2018-01-12

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