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1. Context
The large family of materials can be subdivided into several subgroups, notably according to their chemical nature: organic/inorganic, metallic/non-metallic, natural/synthetic, etc. As materials are by definition useful solids, chosen by the user for their properties, another classification is based on their applications: structural materials on the one hand, and functional materials on the other. The former are used for their mechanical performance, the latter for any other property of interest: optical, electrical, magnetic, catalytic, etc. This article focuses on the latter family, and more specifically on porous materials.
Generally speaking, three types of porosity are considered: micropores, with a width of 2 nm or less, mesopores, between 2 and 50 nm, and macropores, over 50 nm. This definition is that of IUPAC
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Context
Main constituents of wood
Bibliography
- (1) - SING (K.S.W.), EVERETT (D.H.), HAUL (R.A.W.), MOSCOU (L.), PIEROTTI (R.A.), ROUQUEROL (J.), SIEMIENIEWSKA (T.) - Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendation 1984). - Pure Appl. Chem., 57(4), p. 603-619 (1985).
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Standards and norms
- Reaction to fire tests – Heat output, smoke development rate and mass loss rate – Part 1: Heat flow (conical calorimeter method) - ISO/CD 5660-1 - 1993
- Standard test method for determining material ignition and flame spread properties - ASTM E1321-97a -
- Determination of the emission of volatile organic compounds an aldehydes for building products – Small chamber method - JIS A 1901 - 2003
Patents
Composizione per la fabbricazione di un materiale espanso a base di tannini, materiale espanso da essa ottenibile, e relativo procedimento di fabbricazione. Italian patent, filed on 21/07/2011 under no. TO2011A000656
Rigid foams based on procyanidin or prodelphinidin tannins and process for their preparation. French patent, filed on 23/08/2011 under n° 11/025821. Extension filed on 2/08/2012 under PCT/FR2012/051828....
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