We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Structure and Electromagnetic Properties of Cellular Glassy Carbon Monoliths with Controlled Cell Size.
- Authors
Szczurek, Andrzej; Fierro, Vanessa; Plyushch, Artyom; Macutkevic, Jan; Kuzhir, Polina; Celzard, Alain
- Abstract
Electromagnetic shielding is a topic of high importance for which lightweight materials are highly sought. Porous carbon materials can meet this goal, but their structure needs to be controlled as much as possible. In this work, cellular carbon monoliths of well-defined porosity and cell size were prepared by a template method, using sacrificial paraffin spheres as the porogen and resorcinol-formaldehyde (RF) resin as the carbon precursor. Physicochemical studies were carried out for investigating the conversion of RF resin into carbon, and the final cellular monoliths were investigated in terms of elemental composition, total porosity, surface area, micropore volumes, and micro/macropore size distributions. Electrical and electromagnetic (EM) properties were investigated in the static regime and in the Ka-band, respectively. Due to the phenolic nature of the resin, the resultant carbon was glasslike, and the special preparation protocol that was used led to cellular materials whose cell size increased with density. The materials were shown to be relevant for EM shielding, and the relationships between those properties and the density/cell size of those cellular monoliths were elucidated.
- Subjects
ELECTROMAGNETIC shielding; PARAFFIN wax; POROSITY; FORMALDEHYDE; MACROPORES (Catalysis)
- Publication
Materials (1996-1944), 2018, Vol 11, Issue 5, p709
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma11050709