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Langmuir

Title:		Calcium Sulfate Nanoparticles with Unusual Dispersibility in Organic Solvents for Transparent Film Processing
Author(s):		Leukel S; Panthofer M; Mondeshki M; Schartl W; Plana-Ruiz S; Tremel W;
Address:		"Institut fur Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universitat , Duesbergweg 10-14 , D-55128 Mainz , Germany. Graduate School Materials Science in Mainz, Staudingerweg 9 , D-55128 Mainz , Germany. Institut fur Physikalische Chemie , Johannes Gutenberg-Universitat Mainz , Jakob-Welder-Weg 11-15 , D-55128 Mainz , Germany. Department of Materials and Geoscience , Technische Universitat Darmstadt , Petersenstrasse 23 , 64287 Darmstadt , Germany. LENS, MIND/IN2UB, Department of Electronics and Biomedical Engineering , Universitat de Barcelona , Marti i Franques 1 , 08028 Barcelona , Catalonia"
Journal Title:		Langmuir
Year:		2018
Volume:		20180608
Issue:		24
Page Number:		7096 - 7105
DOI:		10.1021/acs.langmuir.8b00927
ISSN/ISBN:		1520-5827 (Electronic) 0743-7463 (Linking)
Abstract:		"Calcium sulfate is one of the most important construction materials. Today it is employed as high-performance compound in medical applications and cement mixtures. We report a synthesis for calcium sulfate nanoparticles with outstanding dispersibility properties in organic solvents without further functionalization. The nanoparticles (amorphous with small gamma-anhydrite crystallites, 5-50 nm particle size) form long-term stable dispersions in acetone without any sign of precipitation. (1)H NMR spectroscopic techniques and Fourier-transform infrared spectroscopy (FTIR) reveal absorbed 2-propanol on the particle surfaces that induce the unusual dispersibility. Adding water to the nanoparticle dispersion leads to immediate precipitation. A phase transformation to gypsum via bassanite was monitored by an in situ kinetic FT-IR spectroscopic study and transmission electron microscopy (TEM). The dispersibility in a volatile organic solvent and the crystallization upon contact with water open a broad field of applications for the CaSO(4) nanoparticles, e.g., as nanogypsum for coatings or the fabrication of hybrid composites"
Keywords:
Notes:		"PubMed-not-MEDLINELeukel, Sebastian Panthofer, Martin Mondeshki, Mihail Schartl, Wolfgang Plana-Ruiz, Sergi Tremel, Wolfgang eng Research Support, Non-U.S. Gov't 2018/06/02 Langmuir. 2018 Jun 19; 34(24):7096-7105. doi: 10.1021/acs.langmuir.8b00927. Epub 2018 Jun 8"