High strength metakaolin/epoxy hybrid geopolymers: Synthesis, characterization and mechanical properties

Singla, Rashmi; Senna, Mamoru; Mishra, Trilochan; Alex, T C; Kumar, Sanjay

doi:10.1016/j.clay.2022.106459

Cited by 17 publications

(2 citation statements)

References 54 publications

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“…All the sample figures indicate some slightly larger stacked grains of unreacted metakaolin that are between 5 µm and 20 µm in size. This is consistent with the activation process of aluminosilicates, such as metakaolin, where unreacted quartz and kaolin grains stay unreacted during the geopolymerization process [ 32 ]. The aluminosilicate matrix shows extremely small grains below the size of 1 µm, respectively, which are mutually agglomerated into larger spherical amorphous masses.…”

Section: Resultssupporting

confidence: 84%

Design of PEI and Amine Modified Metakaolin-Brushite Hybrid Polymeric Composite Materials for CO2 Capturing

et al. 2023

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In this paper, the properties of organic-inorganic hybrid polymer materials, which were synthesized from an aluminosilicate inorganic matrix with the addition of brushite and aminosilane grafted on one side and PEI covalently bonded composites on the other side, were examined. The synthesized organic-inorganic hybrid polymers were examined in terms of a structural, morphological, thermo-gravimetric, and adsorption-desorption analysis and also as potential CO2 capturers. The structural and phase properties as well as the percentage contents of the crystalline and amorphous phase were determined by the X-ray diffraction method. The higher content of the amorphous phase in the structure of hybrid polymers was proven in metakaolin and metakaolin-brushite hybrid samples with the addition of amino silane and with 1,000,000 PEI in a structure. The DRIFT method showed the main band changes with the addition of an organic phase and inorganic matrix. Microstructural studies with the EDS analysis showed a uniform distribution of organic and inorganic phases in the hybrid geopolymers. The thermo-gravimetric analysis showed that organic compounds are successfully bonded to inorganic polymer matrix, while adsorption-desorption analysis confirmed that the organic phase completely covered the surface of the inorganic matrix. The CO2 adsorption experiments showed that the amine-modified composites have the higher capture capacity, which is 0.685 mmol·g−1 for the GM10 sample and 0.581 mmol·g−1 for the BGM10 sample, with 1,000,000 PEI in the structure.

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Section: Resultssupporting

confidence: 84%

Design of PEI and Amine Modified Metakaolin-Brushite Hybrid Polymeric Composite Materials for CO2 Capturing

et al. 2023

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“…Geopolymers are inorganic polymers formed by polycondensation of various precursor materials [1], including metakaolin [2], fly ash [3] and granulated blast furnace slag [4], in strongly alkaline environment, by using special activator solutions, usually water solutions of hydroxides or silicates [5]. During geopolymerization process, a zeolitic, microporous structure, similar to natural zeolites, is formed [6].…”

Section: Introductionmentioning

confidence: 99%

The Military and Civilian Applications of Geopolymers

Růžek,

Louda,

Nosek

2023

AiMT

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In this article, various geopolymer applications in the context of both existing and potential future military applications are summarized. Geopolymers are a type of alkaline activated concrete binder with many advantageous properties over ordinary Portland cement based materials. Geopolymers are first compared to ordinary Portland cement based materials in regards to their mechanical properties, thermal properties, chemical resistance and CO2 emissions during manufacturing. History of geopolymer applications and research is also discussed. Then, various geopolymer applications are summarized, including their use as a passive fire protection, material for general construction, “ink”for 3D printing. These types of applications are also discussed in the context of existing and potential military applications of geopolymers, including their use by U.S. armed forces and U.S. military research. Superior geopolymer resistance to explosions is also presented.

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New insights into the early-age reaction kinetics of metakaolin geopolymer by 1H low-field NMR and isothermal calorimetry

Liang

Yao

She

2023

Cement and Concrete Composites

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High strength metakaolin/epoxy hybrid geopolymers: Synthesis, characterization and mechanical properties

Cited by 17 publications

References 54 publications

Design of PEI and Amine Modified Metakaolin-Brushite Hybrid Polymeric Composite Materials for CO2 Capturing

Design of PEI and Amine Modified Metakaolin-Brushite Hybrid Polymeric Composite Materials for CO2 Capturing

The Military and Civilian Applications of Geopolymers

New insights into the early-age reaction kinetics of metakaolin geopolymer by 1H low-field NMR and isothermal calorimetry

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