Hybrid Geopolymers from Fly Ash and Polysiloxanes

Molecules

Laura Ricciotti¹  Giuseppina Roviello¹  AntonioJacopo Molino¹  Claudio Ferone¹  Raffaele Cioffi¹  Oreste Tarallo²  Costantino Menna³ 

[1] Dipartimento di Ingegneria, Università di Napoli ‘Parthenope’, Centro Direzionale, Isola C4, 80143 Napoli, Italy;Dipartimento di Scienze Chimiche, Università degli Studi di Napoli “Federico II”, Complesso Universitario di Monte S. Angelo, via Cintia, 80126 Napoli, Italy;Dipartimento di Strutture per l’Ingegneria e l’Architettura, Università degli Studi di Napoli “Federico II”, 80125 Napoli, Italy;

关键词: hybrid geopolymer;    geopolymer;    fly ash;    polysiloxane;    microtomography;    morphology;    mechanical properties;   

DOI  :  10.3390/molecules24193510

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown