Hybrid Geopolymers from Fly Ash and Polysiloxanes
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Dipartimento di Ingegneria, Università di Napoli ‘Parthenope’, Centro Direzionale, Isola C4, 80143 Napoli, Italy
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INSTM Research Group Napoli Parthenope, National Consortium for Science and Technology of Materials, Via G. Giusti, 9 50121 Firenze, Italy
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Dipartimento di Strutture per l’Ingegneria e l’Architettura, Università degli Studi di Napoli “Federico II”, 80125 Napoli, Italy
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Dipartimento di Scienze Chimiche, Università degli Studi di Napoli “Federico II”, Complesso Universitario di Monte S. Angelo, via Cintia, 80126 Napoli, Italy
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(19), 3510; https://doi.org/10.3390/molecules24193510
Received: 17 August 2019
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Revised: 22 September 2019
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Accepted: 25 September 2019
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Published: 27 September 2019
The preparation and characterization of innovative organic-inorganic hybrid geopolymers, obtained by valorizing coal fly ash generated from thermoelectric power plants, is reported for the first time. These hybrid materials are prepared by simultaneously reacting fly ash and dimethylsiloxane oligomers at 25 °C in a strongly alkaline environment. Despite their lower density, the obtained materials are characterized by highly improved mechanical properties when compared to the unmodified geopolymer obtained without the use of polysiloxanes, hence confirming the effectiveness of the applied synthetic strategy which specifically aims at obtaining hybrid materials with better mechanical properties in respect to conventional ones. This study is an example of the production of new materials by reusing and valorizing waste raw resources and by-products, thus representing a possible contribution towards the circular economy.
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Keywords:
hybrid geopolymer; geopolymer; fly ash; polysiloxane; microtomography; morphology; mechanical properties
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MDPI and ACS Style
Roviello, G.; Ricciotti, L.; Molino, A.J.; Menna, C.; Ferone, C.; Cioffi, R.; Tarallo, O. Hybrid Geopolymers from Fly Ash and Polysiloxanes. Molecules 2019, 24, 3510. https://doi.org/10.3390/molecules24193510
AMA Style
Roviello G, Ricciotti L, Molino AJ, Menna C, Ferone C, Cioffi R, Tarallo O. Hybrid Geopolymers from Fly Ash and Polysiloxanes. Molecules. 2019; 24(19):3510. https://doi.org/10.3390/molecules24193510
Chicago/Turabian StyleRoviello, Giuseppina, Laura Ricciotti, Antonio J. Molino, Costantino Menna, Claudio Ferone, Raffaele Cioffi, and Oreste Tarallo. 2019. "Hybrid Geopolymers from Fly Ash and Polysiloxanes" Molecules 24, no. 19: 3510. https://doi.org/10.3390/molecules24193510
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