Vijay Immanuel Raman
Bosch
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Publication
Featured researches published by Vijay Immanuel Raman.
Langmuir | 2008
Chrystelle Egger; C. du Fresne; Vijay Immanuel Raman; Volker Schädler; T. Frechen; S. V. Roth; P. Müller-Buschbaum
Highly porous polymeric materials with pore sizes ranging from 100 nm to 1 microm are a very challenging class of materials not only to prepare synthetically (due to the high capillary pressures generated upon solvent removal) but also to characterize structurally. Through the examples of three different types of porous compounds synthesized in our laboratory (i) high-density melamine-based MF-hd with monomodal pore diameters around 500-900 nm, (ii) low-density melamine-based MF-ld with bimodal pore size distribution and average diameters around 2.3 microm and 350 nm, (iii) highly porous polyurethane PU with monomodal pore sizes around 150 nm, we confirm the limitations of mercury porosimetry as a means to investigate the architecture of materials with very high porosity (>80 vol %) and low compressive strength. Instead, a combination of high-resolution scanning electron microscopy and small-angle and ultrasmall-angle X-ray scattering (SAXS and USAXS, respectively) studies of these three types of materials helps in determining both the network and the pore structures. This work elucidates the need and applicability of the SAXS/USAXS techniques in characterizing such porous materials. For instance, the polyurethane specimens can only be quantitatively characterized by scattering techniques, the results of which are corroborated by high-resolution scanning electron microscopy observations.
Archive | 2008
Volker Schädler; Marc Fricke; Werner Wiegmann; Andreas Emge; Vijay Immanuel Raman; Antonio Sanchez-Ferrer
Materials Science and Engineering: C | 2007
Daniel Schmidt; Vijay Immanuel Raman; Chrystelle Egger; Cedric du Fresne; Volker Schädler
Archive | 2017
Volker Schädler; Antonio Sanchez-Ferrer; Vijay Immanuel Raman; Marc Fricke; Bernd Bruchmann
Archive | 2008
Volker Schädler; Vijay Immanuel Raman; Marc Fricke
Archive | 2006
Volker Schädler; Vijay Immanuel Raman; Fresne Von Hohenesche Cedric Du
Archive | 2006
Volker Schädler; Vijay Immanuel Raman; Cedric Du Fresne von Hohenesche
Archive | 2008
Volker Schädler; Vijay Immanuel Raman; Marc Fricke
Archive | 2008
Volker Schaedler; Marc Fricke; Werner Wiegmann; Andreas Emge; Vijay Immanuel Raman; Antonio Sanchez-Ferrer
Archive | 2008
Andreas Emge; Marc Fricke; Vijay Immanuel Raman; Antonio Sanchez-Ferrer; Volker Schädler; Werner Wiegmann