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Issue 4, 2021
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Mineral plastic foams

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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.

Graphical abstract: Mineral plastic foams

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Article information

22 Jan 2021
29 Jan 2021
First published
03 Feb 2021

Mater. Horiz., 2021,8, 1222-1229
Article type

Mineral plastic foams

P. Menold, H. Cölfen and C. Stubenrauch, Mater. Horiz., 2021, 8, 1222
DOI: 10.1039/D1MH00122A

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