Sorption-Related Characteristics of Surface Charred Spruce Wood.

ABSTRACT: Surface charring of wood is a one-sided thermal modification process that can be used to create a hydrophobic, durable surface to exterior claddings. Spruce (Picea abies L.) wood samples were charred with a hot plate and several time-temperature combinations while using simultaneous surface compression. Temperature profile, water sorption, cupping after water exposure and density profile were measured. Furthermore, changes in the microstructure and surface functional groups were investigated by scanning electron microscopy and photoacoustic FT-IR spectroscopy. Results show that surface charring notably improves the hydrophobicity measured by contact angle, water floating and dynamic vapour sorption. Increased holding time during charring reduced the sorption but at the same time inc

SUBMITTER: Kymalainen M 

PROVIDER: S-EPMC6266808 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature