Details
| Original language | English |
|---|---|
| Pages (from-to) | 5857-5875 |
| Number of pages | 19 |
| Journal | Waste and biomass valorization |
| Volume | 11 |
| Issue number | 11 |
| Early online date | 30 Oct 2019 |
| Publication status | Published - Nov 2020 |
Abstract
Abstract: This study focuses on the preparation of porous poly(phospho-siloxo) networks for thermal insulation applications using commercial calcium carbonate and calcium-rich wastes such as oyster shell, snail shell and eggshell powders as pore-forming agents. The control and porous poly(phospho-siloxo) networks were prepared by adding phosphoric acid (4 M) as a chemical ingredient to metakaolin containing 0 and 15 wt% of each foaming agents. The final products were monitored using the X-ray diffractometry, infrared spectroscopy, apparent density, absolute density, thermal conductivity, optical microscopy, scanning electron microscopy and mercury intrusion porosimetry. The results show that the thermal conductivity of the control and porous poly(phospho-siloxo) network from commercial calcium carbonate are 0.35 and 0.20 W/mK, respectively. They were higher compared to those from snail shell (0.17 W/mK), eggshell (0.15 W/mK) and oyster shell (0.14 W/mK). The cumulative pore volumes are 211.4, 365.5, 380.6, 389.7 and 393.3 mm3/g for the control and porous specimens from chicken eggshell, commercial calcium carbonate, snail shell and oyster shell powders, respectively. Their total porosity measured by mercury intrusion porosimeter are 30.9, 45.5, 46.0, 45.9 and 45.4%, respectively, whereas those calculated with apparent and true density measured by pycnometer are 34.48, 45.25, 52.74, 50.84 and 52.60%, respectively. The concentrated pore size diameter of the porous sample from eggshell is highest compared to the others. It can be seen that the total porosities measured by mercury intrusion porosimeter of porous specimens are nearly the same trend as well as the thermal conductivity. It was found that the low-value calcium-rich wastes could be used for producing porous poly(phospho-siloxos) networks which could be utilized for thermal insulation applications. Graphic Abstract: [Figure not available: see fulltext.].
Keywords
- Chemical ingredient, Foaming agents, Metakaolin, Poly(phospho-siloxo), Porosity, Thermal conductivity
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Environmental Science(all)
- Waste Management and Disposal
Sustainable Development Goals
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In: Waste and biomass valorization, Vol. 11, No. 11, 11.2020, p. 5857-5875.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Production of Porous Poly(phospho-siloxo) Networks for Thermal Insulations Using Low-Value Calcium-Rich Wastes as Pore-Forming Agents
AU - Tchakouté, Hervé K.
AU - Bewa, Christelle N.
AU - Kesseng, Nadine A.
AU - Rüscher, Claus H.
AU - Kamseu, Elie
AU - Andreola, Fernanda
AU - Ali, Benoît Nait
AU - Leonelli, Cristina
N1 - Funding Information: Dr. Tchakouté Kouamo Hervé gratefully acknowledges the Alexander von Humboldt Foundation for its financial support this work under Grant N ° KAM/1155741 GFHERMES-P. The authors would like to thank Mr Valerie Petrov for SEM observations. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
PY - 2020/11
Y1 - 2020/11
N2 - Abstract: This study focuses on the preparation of porous poly(phospho-siloxo) networks for thermal insulation applications using commercial calcium carbonate and calcium-rich wastes such as oyster shell, snail shell and eggshell powders as pore-forming agents. The control and porous poly(phospho-siloxo) networks were prepared by adding phosphoric acid (4 M) as a chemical ingredient to metakaolin containing 0 and 15 wt% of each foaming agents. The final products were monitored using the X-ray diffractometry, infrared spectroscopy, apparent density, absolute density, thermal conductivity, optical microscopy, scanning electron microscopy and mercury intrusion porosimetry. The results show that the thermal conductivity of the control and porous poly(phospho-siloxo) network from commercial calcium carbonate are 0.35 and 0.20 W/mK, respectively. They were higher compared to those from snail shell (0.17 W/mK), eggshell (0.15 W/mK) and oyster shell (0.14 W/mK). The cumulative pore volumes are 211.4, 365.5, 380.6, 389.7 and 393.3 mm3/g for the control and porous specimens from chicken eggshell, commercial calcium carbonate, snail shell and oyster shell powders, respectively. Their total porosity measured by mercury intrusion porosimeter are 30.9, 45.5, 46.0, 45.9 and 45.4%, respectively, whereas those calculated with apparent and true density measured by pycnometer are 34.48, 45.25, 52.74, 50.84 and 52.60%, respectively. The concentrated pore size diameter of the porous sample from eggshell is highest compared to the others. It can be seen that the total porosities measured by mercury intrusion porosimeter of porous specimens are nearly the same trend as well as the thermal conductivity. It was found that the low-value calcium-rich wastes could be used for producing porous poly(phospho-siloxos) networks which could be utilized for thermal insulation applications. Graphic Abstract: [Figure not available: see fulltext.].
AB - Abstract: This study focuses on the preparation of porous poly(phospho-siloxo) networks for thermal insulation applications using commercial calcium carbonate and calcium-rich wastes such as oyster shell, snail shell and eggshell powders as pore-forming agents. The control and porous poly(phospho-siloxo) networks were prepared by adding phosphoric acid (4 M) as a chemical ingredient to metakaolin containing 0 and 15 wt% of each foaming agents. The final products were monitored using the X-ray diffractometry, infrared spectroscopy, apparent density, absolute density, thermal conductivity, optical microscopy, scanning electron microscopy and mercury intrusion porosimetry. The results show that the thermal conductivity of the control and porous poly(phospho-siloxo) network from commercial calcium carbonate are 0.35 and 0.20 W/mK, respectively. They were higher compared to those from snail shell (0.17 W/mK), eggshell (0.15 W/mK) and oyster shell (0.14 W/mK). The cumulative pore volumes are 211.4, 365.5, 380.6, 389.7 and 393.3 mm3/g for the control and porous specimens from chicken eggshell, commercial calcium carbonate, snail shell and oyster shell powders, respectively. Their total porosity measured by mercury intrusion porosimeter are 30.9, 45.5, 46.0, 45.9 and 45.4%, respectively, whereas those calculated with apparent and true density measured by pycnometer are 34.48, 45.25, 52.74, 50.84 and 52.60%, respectively. The concentrated pore size diameter of the porous sample from eggshell is highest compared to the others. It can be seen that the total porosities measured by mercury intrusion porosimeter of porous specimens are nearly the same trend as well as the thermal conductivity. It was found that the low-value calcium-rich wastes could be used for producing porous poly(phospho-siloxos) networks which could be utilized for thermal insulation applications. Graphic Abstract: [Figure not available: see fulltext.].
KW - Chemical ingredient
KW - Foaming agents
KW - Metakaolin
KW - Poly(phospho-siloxo)
KW - Porosity
KW - Thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=85074695313&partnerID=8YFLogxK
U2 - 10.1007/s12649-019-00846-z
DO - 10.1007/s12649-019-00846-z
M3 - Article
AN - SCOPUS:85074695313
VL - 11
SP - 5857
EP - 5875
JO - Waste and biomass valorization
JF - Waste and biomass valorization
SN - 1877-2641
IS - 11
ER -