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Im Sommersemester 2013 initiierte die Hochschule Rosenheim mit der Fakultät Innenarchitektur, Architektur und Design sowie der Fakultät Holztechnik und Bau unter der gemeinsamen Leitung von Prof. Kilian Stauss und Prof. Thorsten Ober im Auftrag der Häfele GmbH & Co. KG das Forschungsprojekt »Transforming Space«. In diesem sollte untersucht werden, wie ein typisches Einraum-Appartment mit 25 m2 Grundfläche, wie es für Großstädte und vor allem für viele Neubauten im asiatischen Raum typisch ist, flexibel und komfortabel für zwei Personen möbliert werden kann.
Dieser Markt ist sowohl für die Innenarchitektur als auch für das Möbeldesign und die Möbelkonstruktion interessant, schließlich liegt die Verstädterungsquote, also der Anteil der Weltbevölkerung, der in Städten lebt, seit Mitte der 1990er Jahre bei über 50% und die Tendenz ist steigend. Die aktuellen vielgeschossigen Wohnungsbauten werden noch mindestens 3 Jahrzehnte unverändert bestehen und bilden damit eine Konstante, mit der sich die Möbelgestaltung auseinandersetzen muss.
GHG network analysis FMCG
(2013)
Novel hybrid admixtures for construction applications were prepared by layer-by-layer deposition technique. Colloidal core templates consisting of styrene/n-butylacrylate latex particles were coated with multilayers of superplasticizers commonly used in concrete. This way, core-shell particles possessing both dispersing and film-forming properties were achieved. Incorporation of the latex@dispersant hybrid additive into a cement paste results in a slow release of the superplasticizer as a result of gradual shell disintegration which instigates prolonged plastification (long ”slump life”) of the cement slurry. Once the shell has been dissolved, latex particles are released into the pore solution and can coalesce into a polymer film which improves the mechanical properties of the hardened cement. Characterization of the templates and novel additives was performed by means of zeta potential measurement, dynamic light scattering and electron microscopy. Our method allows to synthesize multifunctional additives with time-controlled release effect.
Novel microcapsules were prepared from colloidal core–shell particles by acid dissolution of the organic core. Weakly crosslinked, monodisperse and spherical melamine-formaldehyde polycondensate particles (diameter ∼ 1 μm) were synthesized as core template and coated with multilayers of an anionic polyelectrolyte via layer-by-layer deposition technique. As polyelectrolytes, an anionic naphthalenesulfonate formaldehyde polycondensate that is a common concrete superplasticizer and thus industrially available, and cationic poly(allylamine hydrochloride) were used. Core removal was achieved by soaking the core–shell particles in aqueous hydrochloric acid at pH 1.6, resulting in hollow microcapsules consisting of the polyelectrolytes. Characterization of the template, the core–shell particles, and the microcapsules plus tracking of the layer-by-layer polyelectrolyte deposition was performed by means of zeta potential measurement and scanning electron microscopy. The microcapsules might be useful as microcontainers for cement additives.
Several methods were employed to study the time dependent film formation of a self synthesized anionic latex dispersion in water and cement pore solution. First, a model carboxylated styrene/n-butyl acrylate latex dispersion possessing a minimum film forming temperature (MFFT) of 18 °C and a glass transition temperature (Tg) of 30 °C was synthesized via emulsion polymerization. Next, its film forming behaviour was studied at 40 °C, using an ESEM instrument. The analysis revealed that upon removal of water, film formation occurs as a result of particle packing, particle deformation and finally particle coalescence. Film formation is significantly hindered in synthetic cement pore solution. This effect can be ascribed to adsorption of Ca2+ ions onto the surface of the anionic latex particles and to interfacial secondary phases. This layer of adsorbed Ca2+ ions hinders interdiffusion of the macromolecules and subsequent film formation of the latex polymer.
People can exert control over the contents of their memory and can intentionally forget information when cued to do so. The present study examined such intentional forgetting in older adults using the listwise directed forgetting (DF) task. We replicated prior work by finding intact forgetting in young-old adults (up to 75 years). Extending the prior work, we additionally found forgetting to decline gradually with individuals' age and to be inefficient in old-old adults (above 75 years). The results indicate that listwise DF is a late-declining capability, suggesting a deficit in very old adults' episodic memory control.
High-Tech Supply Chains
(2013)