Graphene oxides (GOs), an oxygenated derivative of graphene, spontaneously undergo monolayer exfoliation in water, and thus, form liquid crystalline (LC) suspensions. Unfortunately, the resultant suspensions vitrify around a 1 wt% composition, which commonly act as an obstacle for GO based material fabrication, while degrading the molecular ordering and relevant material properties. Here, we systematically investigate the phase behavior and structural evolution of GO LC suspensions under various experimental conditions and disclose how the glass transition of GO dispersion is affected particularly in the presence of strongly interacting polymers. The supplementary polymer additives can effectively retard the ‘glass transition’ of a GO suspension, broaden the concentration range for a nematic LC phase toward a lower as well as higher concentration range and dramatically decrease the viscosity of the suspension down to the 1/100 – 1/1000 level. Extensive small angle x-ray scattering and rheological measurements are employed to characterize the molecular level GO structures in LC suspensions.

中文翻译：

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具有相互作用的聚合物的氧化石墨烯水悬浮液的宽浓度液晶性

石墨烯的氧化衍生物氧化石墨烯（GOs）在水中自发地发生单层剥落，因此形成液晶（LC）悬浮液。不幸的是，所得的悬浮液在约1wt％的组成下玻璃化，这通常成为GO基材料制造的障碍，同时降低了分子有序性和相关的材料性能。在这里，我们系统地研究了各种实验条件下GO LC悬浮液的相行为和结构演变，并揭示了GO分散体的玻璃化转变如何受到影响，尤其是在存在强相互作用的聚合物的情况下。补充的聚合物添加剂可以有效地阻止GO悬浮液的“玻璃化转变”，将向列型液相的浓度范围扩大到较低和较高的浓度范围，并将悬浮液的粘度显着降低到1/100 – 1/1000的水平。广泛的小角度X射线散射和流变学测量用于表征LC悬浮液中的分子水平GO结构。