3-D structured porous carbons with virtually any shape from whey powders. (30th April 2021)
- Record Type:
- Journal Article
- Title:
- 3-D structured porous carbons with virtually any shape from whey powders. (30th April 2021)
- Main Title:
- 3-D structured porous carbons with virtually any shape from whey powders
- Authors:
- Llamas-Unzueta, Raúl
Menéndez, J. Angel
Ramírez-Montoya, Luis A.
Viña, Jaime
Argüelles, Antonio
Montes-Morán, Miguel A. - Abstract:
- Abstract: The conventional carbonisation (450-1000 °C) of whey powders gives totally unexpected results in terms of the mechanical integrity of the resulting carbons. Pieces of different geometries can be easily prepared by pouring the powders loosely into a mould. This green precursor adopts the shape of the predesigned mould at relatively low temperatures (120-150 °C) through the sintering of the whey particles surfaces. The shape of the pre-conformed pieces is preserved at least up to 1000 °C under N2 atmosphere, with a linear shrinkage of ca. 23%. The flexural strength and modulus of the resulting 3-D structured porous carbons are outstanding for a biomass derived carbon monolith, and their abrasiveness exceptionally low, similar to porous monoliths derived from phenolic resins. In addition, carbons obtained at temperatures above 800 °C develop a hierarchical porosity covering from micropores to macropores up to 400 μm granting high permeable structures. It is postulated that the presence of both lactose and whey proteins in whey powders is key for their atypical behaviour during carbonisation. Graphical abstract: Image 1 Highlights: Atmospheric pressure casting of whey powder and subsequent carbonization produces very consistent porous carbon structures. The mechanical properties of the 3D whey carbons are similar to those of porous carbon monoliths derived from resins. Powdered whey does not melt when heated, but sinters at 150 ° C. Whey powder carbonization differsAbstract: The conventional carbonisation (450-1000 °C) of whey powders gives totally unexpected results in terms of the mechanical integrity of the resulting carbons. Pieces of different geometries can be easily prepared by pouring the powders loosely into a mould. This green precursor adopts the shape of the predesigned mould at relatively low temperatures (120-150 °C) through the sintering of the whey particles surfaces. The shape of the pre-conformed pieces is preserved at least up to 1000 °C under N2 atmosphere, with a linear shrinkage of ca. 23%. The flexural strength and modulus of the resulting 3-D structured porous carbons are outstanding for a biomass derived carbon monolith, and their abrasiveness exceptionally low, similar to porous monoliths derived from phenolic resins. In addition, carbons obtained at temperatures above 800 °C develop a hierarchical porosity covering from micropores to macropores up to 400 μm granting high permeable structures. It is postulated that the presence of both lactose and whey proteins in whey powders is key for their atypical behaviour during carbonisation. Graphical abstract: Image 1 Highlights: Atmospheric pressure casting of whey powder and subsequent carbonization produces very consistent porous carbon structures. The mechanical properties of the 3D whey carbons are similar to those of porous carbon monoliths derived from resins. Powdered whey does not melt when heated, but sinters at 150 ° C. Whey powder carbonization differs strongly from the pyrolysis behavior of its main components, lactose and whey proteins. … (more)
- Is Part Of:
- Carbon. Volume 175(2021)
- Journal:
- Carbon
- Issue:
- Volume 175(2021)
- Issue Display:
- Volume 175, Issue 2021 (2021)
- Year:
- 2021
- Volume:
- 175
- Issue:
- 2021
- Issue Sort Value:
- 2021-0175-2021-0000
- Page Start:
- 403
- Page End:
- 412
- Publication Date:
- 2021-04-30
- Subjects:
- Carbon monoliths -- Porous carbon -- Whey
Carbon -- Periodicals
Carbone -- Périodiques
Koolstof
Toepassingen
Electronic journals
546.681 - Journal URLs:
- http://www.sciencedirect.com/science/journal/00086223 ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.carbon.2021.01.021 ↗
- Languages:
- English
- ISSNs:
- 0008-6223
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3050.991000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 20690.xml