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Influence of the interaction between surfactants and sepiolite on the rheological properties and thermal stability of organo-sepiolite in oil-based drilling fluids
Microporous and Mesoporous Materials ( IF 5.2 ) Pub Date : 2018-06-19 , DOI: 10.1016/j.micromeso.2018.06.017
Guanzheng Zhuang , Zepeng Zhang , Huiwen Chen

The influence of interaction between organic surfactants and sepiolite (Sep) on the structure and rheological properties of organo-sepiolite (OSep) in oil-based drilling fluids was investigated. Sep was modified with three kinds of cationic surfactant. X-ray diffraction, scanning electron microscope, surface properties, thermal analysis and X-ray photoelectron spectroscopy (XPS) were applied to characterize the structures of OSep and interaction between surfactants and Sep. Gel volume and dynamic rheological behavior were used to appraise the rheological properties of OSep/oil fluids. OSep keeps the crystal structure of sepiolite after organic modification and shows the more dispersed fibers. XPS results demonstrated that organic surfactants are in electronic interaction with sepiolite. Surfactants block the micropores of sepiolite by partially inserting and covering, resulting in the decrease of specific surface area. The size of the surfactants plays an important role to insert the channels. The partially insertion of surfactants into the channels leads to better rheological properties and thermal stability of OSep in oil-based drilling fluids.



中文翻译:

表面活性剂与海泡石之间的相互作用对油基钻井液中有机海泡石的流变性质和热稳定性的影响

研究了有机表面活性剂与海泡石(Sep)之间的相互作用对油基钻井液中有机海泡石(OSep)的结构和流变性能的影响。Sep用三种阳离子表面活性剂改性。用X射线衍射,扫描电子显微镜,表面性质,热分析和X射线光电子能谱(XPS)表征了OSep的结构,并研究了表面活性剂与Sep之间的相互作用。 OSep /油液的特性。OSep在有机修饰后保持海泡石的晶体结构,并显示出更分散的纤维。XPS结果表明,有机表面活性剂与海泡石具有电子相互作用。表面活性剂通过部分插入和覆盖来阻断海泡石的微孔,导致比表面积减小。表面活性剂的大小在插入通道中起着重要作用。表面活性剂在通道中的部分插入导致油基钻井液中OSep的流变性能和热稳定性更好。

更新日期:2018-06-19
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