In this study, we aim to evaluate the different dispersion methods that affect the dispersion behavior of graphene nanoribbons (GNRs) and to conduct a contrastive analysis of the different surfactants that influence the dispersion and stability of GNRs in deionized (DI) water and alkaline solution. Moreover, we studied uniformly dispersed GNRs with respect to the hydration, mechanical properties, and microstructure of the cement paste. Owing to the surface defects of the GNRs, electrostatic repulsion was sufficient to overcome the van der Waals force and provide a long-term period of high stability. The results show that by using SPs and 60 min of ultrasonication, the dispersibility of GNRs improved by 8.5 % and 25.7 % in DI water and alkaline solution, respectively. Uniformly dispersed GNRs accelerate the hydration and C-S-H polymerization, resulting in significant increases in compressive strength and splitting tensile strength by 17 % and 33 %, respectively, and reduced porosity by 14.6 % after 28 days of curing.

中文翻译：

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石墨烯纳米带分散和稳定性对水泥浆体机械和水化性能的影响：表面活性剂辅助超声处理的见解


在本研究中，我们旨在评估影响石墨烯纳米带（GNR）分散行为的不同分散方法，并对影响GNR在去离子（DI）水和碱性溶液中分散和稳定性的不同表面活性剂进行对比分析。此外，我们研究了均匀分散的 GNR 的水泥浆的水化、力学性能和微观结构。由于GNR的表面缺陷，静电斥力足以克服范德华力并提供长期的高稳定性。结果表明，通过使用 SP 和 60 分钟的超声波处理，GNR 在去离子水和碱性溶液中的分散性分别提高了 8.5 % 和 25.7 %。均匀分散的 GNR 加速水合和 CSH 聚合，固化 28 天后，压缩强度和劈裂拉伸强度分别显着增加 17% 和 33%，孔隙率降低 14.6%。