Cellulose Nanofibers as a Modifier for Rheology, Curing and Mechanical Performance of Oil Well Cement.
Cellulose Nanofibers as a Modifier for Rheology, Curing and Mechanical Performance of Oil Well Cement.
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DOI：
10.1038/srep31654
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发表时间：
2016-08-16
影响因子：
4.6
通讯作者：
Wu Y
中科院分区：
文献类型：
--
作者：
Sun X;Wu Q;Lee S;Qing Y;Wu Y
尽管纳米纤维素技术及其相关复合材料最近取得了进展，但纳米纤维素对油井水泥（OWC）性能的影响尚不清楚。使用一系列光谱方法结合流变建模和强度分析，研究了纤维素纳米纤维 (CNF) 对 OWC 的流动、水合、形态和强度的影响。 Vom-Berg 模型显示了流变数据的最佳拟合结果。 CNF的添加提高了OWC浆料的屈服应力和水合CNF-OWC复合材料的水合度值。当CNF/OWC比率为0.04wt%时，水合OWC样品的弯曲强度增加了20.7%。 OWC 基体中过量添加 CNF 对水合 CNF-OWC 复合材料的机械性能产生不利影响。这种现象归因于通过形态学和元素耦合分析观察到的 CNF 聚集。这项研究展示了一种用于水泥基配方的可持续增强纳米材料。
The influence of nanocellulose on oil well cement (OWC) properties is not known in detail, despite recent advances in nanocellulose technology and its related composite materials. The effect of cellulose nanofibers (CNFs) on flow, hydration, morphology, and strength of OWC was investigated using a range of spectroscopic methods coupled with rheological modelling and strength analysis. The Vom-Berg model showed the best fitting result of the rheology data. The addition of CNFs increased the yield stress of OWC slurry and degree of hydration value of hydrated CNF-OWC composites. The flexural strength of hydrated OWC samples was increased by 20.7% at the CNF/OWC ratio of 0.04 wt%. Excessive addition of CNFs into OWC matrix had a detrimental effect on the mechanical properties of hydrated CNF-OWC composites. This phenomenon was attributed to the aggregation of CNFs as observed through coupled morphological and elemental analysis. This study demonstrates a sustainable reinforcing nano-material for use in cement-based formulations.