Stone wool is a remarkably versatile material which is finding an increasing use in addressing critical global challenges. Stone wool products for example significantly improve the energy efficiency of buildings, protect against fire, and improve acoustic comfort. Furthermore, stone wool materials can also be used in water management systems to counter the effects of climate changes, and in precision growing applications to improve the efficiency of fresh food production.<br/>Herein we present the systematic in-depth studies of greener binder systems for these stone wool products based on gelatins modified with tannins. The development and studies of these binder systems was achieved using composite bars comprising stone shots with submillimeter diameters as a versatile model for stone wool. The investigations revealed large and intriguing impacts from varying for example the nature of the gelatin component, the tannin component (natural and peptoid-based synthetic analogs), the metal cation of the hydroxide base, the final pH and the presence or absence of oxygen during the production of the composite bars.<br/>The studies presented herein have unveiled a new generation of highly promising greener binder technologies based on non-toxic and natural components that offers a wide range of possibilities for tailor-making properties towards various application areas.

Development of a gelatin-tannin based greener binder technology for stone wool materials

ACS Spring 2022

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