Design of sustainable porous materials based on 3D-structured silica exoskeletons, Diatomite: Chemico-physical and functional properties

Galzerano, Barbara; Capasso, Ilaria; Verdolotti, Letizia; Lavorgna, Marino; Vollaro, Paolo; Caputo, Domenico; Iannace, Salvatore; Liguori, Barbara

doi:10.1016/j.matdes.2018.02.063

Cited by 35 publications

(21 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Moreover, comparing the micrographs with the results obtained in our previous work 27 it can be assessed that the thermal treatment due to the template removal process does not affect the microstructure of the foam, in fact no significant changes can be detected in the cellular structure of the foam. This was predictable considering the mainly ceramic nature of the foam matrix and consequently its intrinsic property of high resistance to elevated temperatures.…”

Section: Resultsmentioning

confidence: 88%

Process strategy to fabricate a hierarchical porosity gradient in diatomite-based foams by 3D printing

Capasso

Liguori

Verdolotti

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

Motivated by the hierarchical micro and nanoscale features in terms of porosity of diatomite, the production of ceramic-graded porous foams with tailored porosity, obtained by using it as raw material, has been proposed. the main challenge during the foam-production process has been the preservation of diatomite nanometric porosity and the addition of other levels of hierarchical porosity. the coupled use of two techniques of direct foaming (chemical and mechanical), combined with the use of 3D printing inverse replica method, assured the achievement of porosity of, respectively, microscopic and macroscopic dimensions. optical and scanning electron microscopies have been performed for an in-depth characterization of the final microstructure. XRD analysis has been carried out to check the influence of sacrificial templates on the matrix mineralogical composition. The porosity of the diatomite-based foams has been investigated by means of nitrogen-adsorption analysis and mercuryintrusion porosimetry. The experimental tests confirmed the presence of different porous architectures ranging over several orders of magnitudes, giving rise to complex systems, characterized by hierarchical levels of porosity. The presence of porosity of graded dimensions affects the final mechanical performances of the macroporous diatomite-based foams, while their mineralogical composition does not result to be affected by the addition of templates.

show abstract

Section: Resultsmentioning

confidence: 88%

Process strategy to fabricate a hierarchical porosity gradient in diatomite-based foams by 3D printing

Capasso

Liguori

Verdolotti

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Large-scale pollution caused by industrial, agricultural and municipal activities generates wastewater, which contains many toxic compounds [ 5 ]. For this reason, scientific and industrial communities are putting great effort into creating sustainable and multifunctional absorbent materials capable to remove or absorb toxic materials [ 6 , 7 , 8 , 9 ]. In this respect, the development of multifunctional porous materials based on natural compounds such as Diatomite [ 10 ] and chitosan [ 11 ] is a very interesting approach [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Green Diatomite/Chitosan-Based Hybrid Foams with Dye Sorption Capacity

et al. 2020

View full text Add to dashboard Cite

The latest tendency of the scientific community regards the development of different classes of green materials able to solve pollution problems caused by industrial and human activity. In this paper, chitosan and diatomite were used to produce a broad-spectrum hybrid adsorbent, either in powder or in monolithic form for environmental pollutant removal. Diatomite–chitosan-based powders and porous diatomite–chitosan hybrids were prepared and characterized by chemical-physical, thermal and morphological analysis. Moreover, their adsorbent capacity towards anionic dye (Indigo Carmine) was also evaluated. Obtained data showed that chitosan improves the adsorption capacity of both systems, increasing the uptake of dye in both diatomite–chitosan systems.

show abstract

“…As a result, it is urgent to find some modified asphalt with excellent road performance, simple construction, and low costs. Rock asphalt and diatomite are good choices among many asphalt modifiers [6,7].…”

Section: Introductionmentioning

confidence: 99%

Rheological Characteristics Evaluation of Bitumen Composites Containing Rock Asphalt and Diatomite

Huang

Wang

He³

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

Previous studies have showed that rock asphalt (RA) or diatomite were used to modify the petroleum bitumen. This paper presents the findings from a study conducted to evaluate the potential impact of RA and diatomite on the rheological characteristics of bitumen composites. RA and diatomite with three different dosages were added into the petroleum bitumen: 18% RA, 13% RA+7% diatomite, and 16% RA+9% diatomite by weight. The rheological characteristics of the RA and diatomite modified bitumens were evaluated in this study. The tests conducted included temperature sweep and frequency sweep tests with a dynamic shear rheometer (DSR), a Brookfield rotation viscosity test, and a scanning electron microscope test. The research showed that the addition of RA and diatomite to petroleum bitumen considerably increased the apparent viscosity, dynamic shear modulus, and rutting resistance in bitumen specimens. However, the DSR test indicated a slight reduction in the fatigue performance of composites made of RA and diatomite modified bitumens. Overall, RA and diatomite are good modifiers for petroleum bitumen for a performance improvement.

show abstract

Design of sustainable porous materials based on 3D-structured silica exoskeletons, Diatomite: Chemico-physical and functional properties

Cited by 35 publications

References 31 publications

Process strategy to fabricate a hierarchical porosity gradient in diatomite-based foams by 3D printing

Process strategy to fabricate a hierarchical porosity gradient in diatomite-based foams by 3D printing

Fabrication of Green Diatomite/Chitosan-Based Hybrid Foams with Dye Sorption Capacity

Rheological Characteristics Evaluation of Bitumen Composites Containing Rock Asphalt and Diatomite

Contact Info

Product

Resources

About