Terahertz time domain detection of imidazolium ionic liquid reactivity in nanohybrid materials based on Kaolinite and Halloysite
作者： Tomáš Zacher , Viktor Hronský , Mira Naftaly , Mária Čaplovičová , Katja Emmerich
DOI: 10.1016/J.CLAY.2016.10.036
关键词: Halloysite 、 Powder diffraction 、 Electromagnetics 、 Intercalation (chemistry) 、 Materials science 、 Chemical engineering 、 Kaolinite 、 Fourier transform infrared spectroscopy 、 Inorganic chemistry 、 Ionic liquid 、 Spectroscopy
摘要: Abstract A new nanohybrid material based on kaolinite intercalate with imidazolium ionic liquid (IL) was compared in its physical-chemical behavior an analogue specimen prepared from halloysite. The intercalation of well-ordered and poorly ordered halloysite, successfully observed by terahertz time-domain spectroscopy (THz-TDS) the far infra-red region. showed unique spectral response: e.g. four broadened bands were for kaolinite-IL intercalate, whereas only one band halloysite-IL intercalate. These spectra make it possible to observe guest reactivity this type materials using THz (far infra-red) spectroscopy. reactions confirmed independent techniques such as X-ray powder diffraction, Fourier transform infrared spectroscopy, simultaneous thermal analysis mass spectrometry, high-resolution solid-state NMR TEM that nanolayers upon repeated IL preserved their platy morphology. This contrast diffraction data showing transformation halloysite-like material. Such delaminated preserving morphology has a good potential application nanocomposite barrier properties.
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