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Influence of interlayer species on the thermal characteristics of montmorillonite
AbstractThe thermal characteristics of montmorillonite (Mt) play significant roles in the application of Mt In this work, a systematic and comparative study regarding the influence of interlayer species on thermal characteristics of Mt was conducted. The raw Mt (Ca-Mt) was first saturated with small inorganic cation (Li+), polyhydroxy-metal cation (polyhydroxy-aluminum, Al13), and organic cation (methylene blue, MB), respectively. The obtained Mt samples (i.e., Li-Mt, Al13-Mt, and MB-Mt) and Ca-Mt were heated from room temperature to 1100°C under Ar atmosphere. X-ray diffraction results indicated that the layers of Ca-Mt and Li-Mt collapsed at 500 and 300°C, respectively; while those of Al13-Mt and MB-Mt would not collapse in this temperature range, owing to the protection of the aluminum oxide pillars and graphene-like carbon sheets within the interlayer spaces, respectively. As the temperature further increased, the layers of Al13-Mt was directly destroyed at 900°C, while those of MB-Mt could be somewhat preserved even at 1100°C. Thermogravimetry analysis showed the DSC exothermic peaks related to the breakdown of the layered structures and the formation of new phases increased in the order Li-Mt<Ca-Mt<Al13-Mt; while no evident DSC exothermic peak was observed for MB-Mt in this high temperature range. Fourier transform infrared spectroscopy further confirmed that the formation of high-temperature mineral phases greatly depended on the interlayer species of Mt. This work would contribute to better understanding the physico-chemical properties of Mt, and developing novel Mt-based materials.
HighlightsThe effect of interlayer species on thermal characteristics of Mt was conducted.The thermal characteristics of Mt were greatly influenced by interlayer species.This work contributes to better understanding the physico-chemical properties of Mt.This work contributes to developing novel Mt-based materials.
Influence of interlayer species on the thermal characteristics of montmorillonite
AbstractThe thermal characteristics of montmorillonite (Mt) play significant roles in the application of Mt In this work, a systematic and comparative study regarding the influence of interlayer species on thermal characteristics of Mt was conducted. The raw Mt (Ca-Mt) was first saturated with small inorganic cation (Li+), polyhydroxy-metal cation (polyhydroxy-aluminum, Al13), and organic cation (methylene blue, MB), respectively. The obtained Mt samples (i.e., Li-Mt, Al13-Mt, and MB-Mt) and Ca-Mt were heated from room temperature to 1100°C under Ar atmosphere. X-ray diffraction results indicated that the layers of Ca-Mt and Li-Mt collapsed at 500 and 300°C, respectively; while those of Al13-Mt and MB-Mt would not collapse in this temperature range, owing to the protection of the aluminum oxide pillars and graphene-like carbon sheets within the interlayer spaces, respectively. As the temperature further increased, the layers of Al13-Mt was directly destroyed at 900°C, while those of MB-Mt could be somewhat preserved even at 1100°C. Thermogravimetry analysis showed the DSC exothermic peaks related to the breakdown of the layered structures and the formation of new phases increased in the order Li-Mt<Ca-Mt<Al13-Mt; while no evident DSC exothermic peak was observed for MB-Mt in this high temperature range. Fourier transform infrared spectroscopy further confirmed that the formation of high-temperature mineral phases greatly depended on the interlayer species of Mt. This work would contribute to better understanding the physico-chemical properties of Mt, and developing novel Mt-based materials.
HighlightsThe effect of interlayer species on thermal characteristics of Mt was conducted.The thermal characteristics of Mt were greatly influenced by interlayer species.This work contributes to better understanding the physico-chemical properties of Mt.This work contributes to developing novel Mt-based materials.
Influence of interlayer species on the thermal characteristics of montmorillonite
Chen, Qingze (author) / Zhu, Runliang (author) / Ma, Lingya (author) / Zhou, Qing (author) / Zhu, Jianxi (author) / He, Hongping (author)
Applied Clay Science ; 135 ; 129-135
2016-09-09
7 pages
Article (Journal)
Electronic Resource
English
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