Advances in electrospun composite polymer/zeolite and geopolymer nanofibers: A comprehensive review

Schneider, Mariana; Rodríguez-Castellón, Enrique; Guerrero-Pérez, M. Olga; Hotza, Dachamir; De Noni, Agenor; de Fátima Peralta Muniz Moreira, Regina

doi:10.1016/j.seppur.2024.126684

Cited by 5 publications

(1 citation statement)

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“…can also be added to obtain the required properties [5,6,[9][10][11][12][13][14][15][16][17][19][20][21][22][23][24][25]. In addition, geopolymeric materials can also be reinforced by adding polymers in the production of hybrid materials [26][27][28][29][30][31]. These materials have been developed following the principles of "Green Chemistry", as they have been obtained by synthesis from a wide variety of raw materials, including mineral by-products and recycled products, thus reducing energy demand and environmental impact during their production [19,20,25,32].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Geopolymeric Materials from Industrial Kaolins, with Variable Kaolinite Content and Alkali Silicates Precursors

Martínez-Martínez,

Bouguermouh,

Bouzidi

et al. 2024

Materials

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In the present work, the development of geopolymeric materials with Na or K based on industrial kaolin samples, with variable kaolinite content and alkaline silicates, is studied. XRF, XRD, FTIR and SEM-EDS have been used as characterization techniques. Three ceramic kaolin samples, two from Algeria and one from Charente (France), have been considered. In particular, chemical and mineralogical characterization revealed elements distinct of Si and Al, and the content of pure kaolinite and secondary minerals. Metakaolinite was obtained by grinding and sieving raw kaolin at 80 μm and then by thermal activation at 750 °C for 1 h. This metakaolinite has been used as a base raw material to obtain geopolymers, using for this purpose different formulations of alkaline silicates with NaOH or KOH and variable Si/K molar ratios. The formation of geopolymeric materials by hydroxylation and polycondensation characterized with different Si/Al molar ratios, depending on the original metakaolinite content, has been demonstrated. Sodium carbonates have been detected by XRD and FTIR, and confirmed by SEM-EDS, in two of these geopolymer materials being products of NaOH carbonation.

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