Kang Jiayuan, Al-Sabah Salam, Théo Roger
School of Civil, Structural & Environmental Engineering, University College Dublin, D04 V1W8, Dublin 04, Ireland.
Materials (Basel). 2020 Mar 13;13(6):1305. doi: 10.3390/ma13061305.
This study aimed to investigate the effects of single-walled carbon nanotubes (SWCNTs) on strength the properties of cement composites when surfactant (SAA) was applied as the dispersion method. TritonX-100 (TX10) was used as the SAA to pretreat SWCNTs, which has been proved to perform well in dispersing the agglomerates of SWCNTs. In this study, four different concentration of SWCNTs, namely 0.00 wt%, 0.02 wt%, 0.04 wt%, and 0.06 wt% by the mass of cement, were used to prepare cement composite specimens. The compressive strength and flexural strength of specimens were tested and recorded. The results show that the compressive and flexural strengths of cement composites decreased with the increase in the concentration of SWCNTs without the addition of TX10. However, when SWCNT suspensions were pretreated with TX10, the strength variation pattern changed; the compressive and flexural strengths of cement composites increased as a function of the concentration of SWCNTs, although there were reductions compared to non-TX10-treated specimens at all concentrations of SWCNTs. Furthermore, the relationship between the strength of cement composites and bulk density of specimens was considered.
本研究旨在探讨当采用表面活性剂（SAA）作为分散方法时，单壁碳纳米管（SWCNTs）对水泥复合材料性能的影响。使用TritonX - 100（TX10）作为SAA对SWCNTs进行预处理，已证明其在分散SWCNTs团聚体方面表现良好。在本研究中，采用四种不同浓度的SWCNTs，即按水泥质量计分别为0.00 wt%、0.02 wt%、0.04 wt%和0.06 wt%，来制备水泥复合材料试件。对试件的抗压强度和抗折强度进行了测试和记录。结果表明，在不添加TX10的情况下，水泥复合材料的抗压强度和抗折强度随SWCNTs浓度的增加而降低。然而，当用TX10对SWCNT悬浮液进行预处理时，强度变化模式发生改变；水泥复合材料的抗压强度和抗折强度随SWCNTs浓度的增加而增加，尽管在所有SWCNTs浓度下与未用TX10处理的试件相比都有所降低。此外，还考虑了水泥复合材料强度与试件体积密度之间的关系。
