Bio-Inspired Hydro-Pressure Consolidation of Silica

J 2018

Bio-Inspired Hydro-Pressure Consolidation of Silica

TAVERI, Gianmarco, Salvatore GRASSO, Francesco GUCCI, Jaromír TOUŠEK, Ivo DLOUHÝ et. al.

Basic information

Original name

Bio-Inspired Hydro-Pressure Consolidation of Silica

Name in Czech

Tlakové zhutňování silikagelu

Authors

TAVERI, Gianmarco (203 Czech Republic, guarantor), Salvatore GRASSO (156 China), Francesco GUCCI (826 United Kingdom of Great Britain and Northern Ireland), Jaromír TOUŠEK (203 Czech Republic, belonging to the institution) and Ivo DLOUHÝ (203 Czech Republic)

Edition

Advanced Functional Materials, Wrinheim, Wiley-VCH Verlag, 2018, 1616-301X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 15.621

RIV identification code

RIV/00216224:14740/18:00104950

Organization unit

Central European Institute of Technology

DOI

http://dx.doi.org/10.1002/adfm.201805794

UT WoS

000451118800018

Keywords (in Czech)

biosilifikaceů hydrostatický tlak; polykondenzace

Keywords in English

biosilicification; hydrostatic pressure; Ostwald ripening; polycondensation; silica

Abstract

ORIG CZ

V originále

Room-temperature hydro-pressure-driven densification of amorphous silica (nanoparticles and microbeads) is developed. This technique is inspired by biological silicification with reference to dissolution, precipitation, and hardening mechanisms. Cold sintering based on uniaxial pressure is taken as a benchmark. Starting from a green-body relative density of 70%, densification exceeding 99% is achieved by adding distilled water or caustic solution to an amorphous powder under a hydrostatic pressure of 450-600 MPa for 5-30 min. Translucent samples are obtained. Silica microbeads are employed as a model system to define the effect of the sintering parameters: pressure, pH, and soaking time. Densification is attained through a preferential precipitation of a second phase from silica dissolution under hydro-pressure. Precipitation is governed by minimization of the surface energy (Ostwald ripening). Transmission electron microscopy, NMR, thermal gravimetric analysis/differential scanning calorimetry, and Fourier transform infrared spectroscopy reveal the mechanisms of the process and the analogies with biosilicification.

In Czech

Bylo studováno lakové zhutňování silikagelu za laboratorní teploty.

Links

LM2015043, research and development project

Name: Česká infrastruktura pro integrativní strukturní biologii (Acronym: CIISB)

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

TAVERI, Gianmarco, Salvatore GRASSO, Francesco GUCCI, Jaromír TOUŠEK and Ivo DLOUHÝ. Bio-Inspired Hydro-Pressure Consolidation of Silica. Advanced Functional Materials. Wrinheim: Wiley-VCH Verlag, 2018, vol. 28, No 48, p. 1805794-1805801. ISSN 1616-301X. Available from: https://dx.doi.org/10.1002/adfm.201805794.

@article{1479537,
   author = {Taveri, Gianmarco and Grasso, Salvatore and Gucci, Francesco and Toušek, Jaromír and Dlouhý, Ivo},
   article_location = {Wrinheim},
   article_number = {48},
   doi = {http://dx.doi.org/10.1002/adfm.201805794},
   keywords = {biosilicification; hydrostatic pressure; Ostwald ripening; polycondensation; silica},
   language = {eng},
   issn = {1616-301X},
   journal = {Advanced Functional Materials},
   title = {Bio-Inspired Hydro-Pressure Consolidation of Silica},
   url = {https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201805794},
   volume = {28},
   year = {2018}
}

TY  - JOUR
ID  - 1479537
AU  - Taveri, Gianmarco - Grasso, Salvatore - Gucci, Francesco - Toušek, Jaromír - Dlouhý, Ivo
PY  - 2018
TI  - Bio-Inspired Hydro-Pressure Consolidation of Silica
JF  - Advanced Functional Materials
VL  - 28
IS  - 48
SP  - 1805794
EP  - 1805794
PB  - Wiley-VCH Verlag
SN  - 1616301X
KW  - biosilicification
KW  - hydrostatic pressure
KW  - Ostwald ripening
KW  - polycondensation
KW  - silica
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201805794
N2  - Room-temperature hydro-pressure-driven densification of amorphous silica (nanoparticles and microbeads) is developed. This technique is inspired by biological silicification with reference to dissolution, precipitation, and hardening mechanisms. Cold sintering based on uniaxial pressure is taken as a benchmark. Starting from a green-body relative density of 70%, densification exceeding 99% is achieved by adding distilled water or caustic solution to an amorphous powder under a hydrostatic pressure of 450-600 MPa for 5-30 min. Translucent samples are obtained. Silica microbeads are employed as a model system to define the effect of the sintering parameters: pressure, pH, and soaking time. Densification is attained through a preferential precipitation of a second phase from silica dissolution under hydro-pressure. Precipitation is governed by minimization of the surface energy (Ostwald ripening). Transmission electron microscopy, NMR, thermal gravimetric analysis/differential scanning calorimetry, and Fourier transform infrared spectroscopy reveal the mechanisms of the process and the analogies with biosilicification.
ER  -

TAVERI, Gianmarco, Salvatore GRASSO, Francesco GUCCI, Jaromír TOUŠEK and Ivo DLOUHÝ. Bio-Inspired Hydro-Pressure Consolidation of Silica. \textit{Advanced Functional Materials}. Wrinheim: Wiley-VCH Verlag, 2018, vol.~28, No~48, p.~1805794-1805801. ISSN~1616-301X. Available from: https://dx.doi.org/10.1002/adfm.201805794.

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