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Synthesis and Characterization of Carbosilane Dendrimer−Sodium Montmorillonite Clay Nanocomposites. Experimental and Theoretical Studies.
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SYSNO ASEP 0467743 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Synthesis and Characterization of Carbosilane Dendrimer−Sodium Montmorillonite Clay Nanocomposites. Experimental and Theoretical Studies. Author(s) Strašák, Tomáš (UCHP-M) RID, ORCID, SAI
Malý, M. (CZ)
Müllerová, M. (CZ)
Čermák, Jan (UCHP-M) RID, ORCID, SAI
Kormunda, M. (CZ)
Čapková, P. (CZ)
Matoušek, J. (CZ)
Červenková Šťastná, Lucie (UCHP-M) RID, ORCID, SAI
Rejnek, J. (CZ)
Holubová, J. (CZ)
Jandová, Věra (UCHP-M) RID, ORCID, SAI
Čépe, K. (CZ)Source Title RSC Advances. - : Royal Society of Chemistry
Roč. 6, č. 49 (2016), s. 43356-43366Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords silicates ; ionic liquids ; molecular dynamics Subject RIV CC - Organic Chemistry Institutional support UCHP-M - RVO:67985858 UT WOS 000375611100069 EID SCOPUS 84968784474 DOI 10.1039/C6RA04442E Annotation Novel organic/inorganic hybrid materials with carbosilane fillers were developed. New carbosilane dendrimers of the first (Dm1) and second (Dm2) generations bearing four and eight cationic ammonium groups on their periphery were synthesized first. Their structure was elucidated by NMR spectroscopy and ESI-HRMS whereas their thermal stability was confirmed by TGA. Both dendrimers were used as organic components in the preparation of organoclays. A series of nanocomposites Dm1Mt and Dm2Mt with varied content of dendrimers were prepared and characterized by a wide variety of analytical techniques. The analytical data show that the structure of organoclays and the ability of dendrimers to effectively interact with montmorillonite is strongly affected by their generation. Both species Dm1 and Dm2 intercalated into the interlayer space of montmorillonite increasing correspondingly the basal spacing of Mt. In contrast to Dm2, increased loadings of Dm1 in suspension during intercalation process have negligible effect on d-spacing in the studied concentration range, as confirmed by XRD analysis. Besides unmodified Mt we studied also interactions of dendrimers with plasma treated Mt and results are presented. Computer modelling based mainly on Molecular Dynamics has shown non-linear dependence of d-spacing on the amount of dendrimers in interlayer space within the studied dendrimer/montrmorillonite mass ratio interval. Filling capacity of plasma unmodified montmorillonite with respect to both dendrimers was estimated using combination of experimental and theoretical results. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2017
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