ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Kaolinite/formamide intercalation materials are characterized using X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), Raman spectroscopy and 1H magic anglespinning nuclear magnetic resonance spectroscopy (1H MAS NMR). The d(001) spacing ofkaolinite treated with formamide is 1.020nm, which is larger than that of the original clay. The 1HMAS NMR graphs show that the proton chemical shifts of the inner hydroxyl and inner surfacehydroxyl of kaolinte are δ-1.3 and δ2.4 respectively. After formamide intercalation, the protonpeaks of the inner surface hydroxyls shifted to high-field with δ2.3, the proton peak of the innerhydroxyl shifted to δ-0.3 toward low-field. In the hydroxyl stretching vibration region of Ramanspectrum, the formamide intercalation resulted in the decrease of the intensities of kaolinite innersurface hydroxyl bands at 3699cm-1,3682cm-1, 3665cm-1 and 3642cm-1, and the appearance ofadditional bands at 3610cm-1,3628cm-1. In the NH stretching region of FT-IR spectrum, two bandsare observed at 3336cm-1 and 3466cm-1 corresponding to the two types of the hydrogen bondsbetween formamide and kaolinite. In the carboxyl stretching region, an additional band at 1667cm-1is assigned to C=O group that bonded to the inner surface hydroxyl of kaolinite
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1362.pdf
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