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Preparation and intercalation structure model of halloysite-stearic acid intercalation compound
https://orcid.org/0000-0002-7736-5337
Abstract The Halloysite/stearic acid (SA) intercalation complex was successfully prepared basing on dimethylsulfoxide (DMSO) intercalated halloysite complex as intermediates. The prepared intercalation samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (thermogravimetry (TGA) and differential scanning calorimetry (DSC)) and transmission electron microscopy (TEM). The XRD data presented that basal interlayer spacing was enlarged to 3.99 nm as the intercalation of SA molecules, meanwhile, the presence of two strong bands observed at 2918 cm−1 and 2849 cm−1 in FT-IR spectrum also indicated SA intercalated into interlayer of Hal. The stearic acid molecules may arranged in a combination form of trilayer parallel arrangement and monolayer aslant at angle of 56.74° to 64.51°. The SA molecules were linked to Al-O-CH3 by hydrogen bond and the hydroxonium ions was absorbed on the SiO4 tetrahedral sheets. The prepared Hal-SA intercalate was stable below 150 °C, and the activation energy E of de-intercalation is 86.81 kJ/mol, which increased by 4.64 kJ/mol compared with that of Hal-DMSO complex. The approximate structure model of the new intercalate was proposed on the basis of XRD, IR and NMR data.
Highlights The halloysite-stearic acid intercalation compound was successfully prepared. The thermal decomposition kinetics parameters of Halloysite-stearic acid (SA) intercalation complex was obtained. The stearic acid molecules may arranged in a combination form of trilayer parallel arrangement and monolayer aslant at angle of 56.74° to 64.51°.
Preparation and intercalation structure model of halloysite-stearic acid intercalation compound
https://orcid.org/0000-0002-7736-5337
Abstract The Halloysite/stearic acid (SA) intercalation complex was successfully prepared basing on dimethylsulfoxide (DMSO) intercalated halloysite complex as intermediates. The prepared intercalation samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (thermogravimetry (TGA) and differential scanning calorimetry (DSC)) and transmission electron microscopy (TEM). The XRD data presented that basal interlayer spacing was enlarged to 3.99 nm as the intercalation of SA molecules, meanwhile, the presence of two strong bands observed at 2918 cm−1 and 2849 cm−1 in FT-IR spectrum also indicated SA intercalated into interlayer of Hal. The stearic acid molecules may arranged in a combination form of trilayer parallel arrangement and monolayer aslant at angle of 56.74° to 64.51°. The SA molecules were linked to Al-O-CH3 by hydrogen bond and the hydroxonium ions was absorbed on the SiO4 tetrahedral sheets. The prepared Hal-SA intercalate was stable below 150 °C, and the activation energy E of de-intercalation is 86.81 kJ/mol, which increased by 4.64 kJ/mol compared with that of Hal-DMSO complex. The approximate structure model of the new intercalate was proposed on the basis of XRD, IR and NMR data.
Highlights The halloysite-stearic acid intercalation compound was successfully prepared. The thermal decomposition kinetics parameters of Halloysite-stearic acid (SA) intercalation complex was obtained. The stearic acid molecules may arranged in a combination form of trilayer parallel arrangement and monolayer aslant at angle of 56.74° to 64.51°.
Preparation and intercalation structure model of halloysite-stearic acid intercalation compound
https://orcid.org/0000-0002-7736-5337
Abstract The Halloysite/stearic acid (SA) intercalation complex was successfully prepared basing on dimethylsulfoxide (DMSO) intercalated halloysite complex as intermediates. The prepared intercalation samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (thermogravimetry (TGA) and differential scanning calorimetry (DSC)) and transmission electron microscopy (TEM). The XRD data presented that basal interlayer spacing was enlarged to 3.99 nm as the intercalation of SA molecules, meanwhile, the presence of two strong bands observed at 2918 cm−1 and 2849 cm−1 in FT-IR spectrum also indicated SA intercalated into interlayer of Hal. The stearic acid molecules may arranged in a combination form of trilayer parallel arrangement and monolayer aslant at angle of 56.74° to 64.51°. The SA molecules were linked to Al-O-CH3 by hydrogen bond and the hydroxonium ions was absorbed on the SiO4 tetrahedral sheets. The prepared Hal-SA intercalate was stable below 150 °C, and the activation energy E of de-intercalation is 86.81 kJ/mol, which increased by 4.64 kJ/mol compared with that of Hal-DMSO complex. The approximate structure model of the new intercalate was proposed on the basis of XRD, IR and NMR data.
Highlights The halloysite-stearic acid intercalation compound was successfully prepared. The thermal decomposition kinetics parameters of Halloysite-stearic acid (SA) intercalation complex was obtained. The stearic acid molecules may arranged in a combination form of trilayer parallel arrangement and monolayer aslant at angle of 56.74° to 64.51°.
Preparation and intercalation structure model of halloysite-stearic acid intercalation compound
Zhang, Yinmin (author) / Li, Yaqiong (author) / Zhang, Yongfeng (author)
Applied Clay Science ; 187
2020-01-15
Article (Journal)
Electronic Resource
English
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