6533b853fe1ef96bd12acc98
RESEARCH PRODUCT
From Norway Spruce Bark to Carbon Foams : Characterization, and Applications
Hanna BrännströmJuha NurmiToni VarilaPetri KilpeläinenUlla LassiJarkko HellströmHenrik Romarsubject
0106 biological sciencesbarkEnvironmental EngineeringMaterials sciencechemistry.chemical_elementBioengineeringThermal treatment01 natural scienceshuokoisuusAdsorptiontannins010608 biotechnologySpecific surface areaextractivescardiovascular diseasesbiomassa (teollisuus)PorosityWaste Management and DisposalChemical compositiontanniinitbiologybiomasspuunkuoricarbon foamsPicea abiesbiology.organism_classificationvaahdotCompressive strengthchemistryChemical engineeringuuttometsäkuusiadsorptioCarbonbiomateriaalitsprucedescription
Fresh bark from spruce Picea abies was milled and extracted with hot water. The extracts were purified in a number of steps in order to get tannin-extracts pure enough to prepare tannin-based carbon foams. The chemical composition of the extracts were analyzed. The foams were maturated and thermally treated to obtain desired properties, such as specific surface area, porosity, and compressive strength. It was possible to produce carbon foams even if they contained carbohydrate impurities. Differences in the properties of the carbon foams such as compressive strength, specific surface areas, and pore size distributions might be related to the compositions of the extracts. The foams were finally activated chemically and physically and were tested in adsorption of methylene blue. Results from the adsorption tests showed that adsorption was highly related to the total pore volume and the amount of mesopores created inside the foam structure during the thermal treatment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-04-01 |