Philipp Menold

2021

1. Cölfen, H., Menold, P., Stubenrauch, C.: Mineralplastikschäume, https://patents.google.com/patent/DE102020002914A1/de?q=Mineral+plastic+foams&inventor=menold&oq=Mineral+plastic+foams+menold), (2021).
   • Abstract
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   Abstract

   Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von makroporösen Hydrogelschäumen sowie hieraus erhältlichen makroporösen Mineralplastik-schäumen.

   Link

   https://patents.google.com/patent/DE102020002914A1/de?q=Mineral+plastic+foams&inventor=menold&oq=Mineral+plastic+foams+menold)
2. Cölfen, H., Menold, P., Stubenrauch, C., Koch, L.: Mineral plastic foams, https://patents.google.com/patent/WO2021228996A1/en?q=Mineral+plastic+foams&inventor=menold&oq=Mineral+plastic+foams+menold, (2021).
   • Abstract
   • Link

   Abstract

   The present invention relates to a method for producing macroporous hydrogel foams and to macroporous mineral plastic foams obtainable by said method.

   Link

   https://patents.google.com/patent/WO2021228996A1/en?q=Mineral+plastic+foams&inventor=menold&oq=Mineral+plastic+foams+menold
3. Menold, P., Strey, R., Preisig, N., Stubenrauch, C.: Experimental evidence of a transition from a sponge-like to a foam-like nanostructure in water-rich L3 phases. Journal of Colloid and Interface Science. 601, 133–142 (2021). https://doi.org/10.1016/j.jcis.2021.05.063.
   • Abstract
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   Abstract

   Hypothesis The micrometer-sized gas bubbles of a liquid foam with a dispersed gas phase of > 74 vol% are polyhedral and surrounded by a continuous aqueous phase. The structure of a water-rich microemulsion with a water phase of > 74 vol% normally consists of oil droplets in water or is bicontinuous. We hypothesize that at these high water contents polyhedral water droplets in oil can also exist. Experiments We (a) carried out phase studies on the water-rich side of the phase diagram of the quaternary system water/NaCl – hexyl methacrylate – AOT, because AOT is known for its propensity to form water-in-oil structures and hexyl methacrylate can be polymerized, (b) measured the electrical conductivities and viscosities, and (c) visualized the nanostructure with freeze-fracture electron microscopy (FFEM). Findings We found narrow 1-phase regions emanating from the L3 phase of the oil-free water/NaCl – AOT system by adding small amounts of oil. In these regions the conductivities become extremely low and the viscosities are extremely high. In addition, FFEM images clearly show the foam-like nanostructure.

   Link

   https://www.sciencedirect.com/science/article/pii/S0021979721007360
4. Menold, P., Cölfen, H., Stubenrauch, C.: Mineral plastic foams. Mater. Horiz. 8, 1222–1229 (2021). https://doi.org/10.1039/D1MH00122A.
   • Abstract
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   Abstract

   We describe a route to synthesize a mechanically stable, non-flammable poly(acrylic acid)–calcium salt (the so-called mineral plastic) foam whose structure can be tailored. Main steps of the foam synthesis are: (1) foaming of the PAA-containing solution, (2) gelation of the continuous foam phase, and (3) drying of the hydrogel foam. The main challenge was to formulate an aqueous solution with a large amount of poly(acrylic acid), PAA, and calcium to yield a mechanically stable foam. The resulting PAA-based solid foams with pore sizes of around 220 μm can easily be dissolved, i.e. recycled, in an acidic solution.

   Link

   http://dx.doi.org/10.1039/D1MH00122A
5. Stubenrauch, C., Cölfen, H., Menold, P.: Materialien: Immer wieder schäumen und lösen. Nachrichten aus der Chemie. 69, (2021). https://doi.org/10.1002/nadc.20214103874.
   • Abstract
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   Abstract

   Eine Alternative zu organischen Kunststoffschäumen für die Wärmedämmung von Gebäuden können Mineralkunststoffe sein. Sie sind nicht brennbar und im Gegensatz zu Silica‐Aerogelen oder Steinwolle gut zu recyceln.

   Link

   https://onlinelibrary.wiley.com/doi/10.1002/nadc.20214103874