Klüppel, André

[["dc.bibliographiccitation.firstpage","493"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Holzforschung"],["dc.bibliographiccitation.lastpage","496"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Klüppel, André"],["dc.contributor.author","Mai, Carsten"],["dc.date.accessioned","2014-02-19T14:18:01Z"],["dc.date.accessioned","2021-10-27T13:13:25Z"],["dc.date.available","2014-02-19T14:18:01Z"],["dc.date.available","2021-10-27T13:13:25Z"],["dc.date.issued","2012"],["dc.description.abstract","Scots pine micro-veneers were subjected to hydrolysis with sulphuric acid or delignifi cation with acidic sodium chlorite and a combination of both treatments. The tensile strength of untreated and treated veneers was determined at fi nite span (f-strength) and zero span (z-strength) under both dry (20 ° C, 65 % relative humidity) and water-saturated conditions. Acidic hydrolysis resulted in signifi cant strength losses in both testing modes and both moisture conditions, with the greatest strength reduction found for f-strength tested dry. After delignification, only f-strength under wet conditions was substantially reduced; dry f-strength and both dry and wet z-strength hardly changed. A combined treatment of prehydrolysis and delignifi cation resulted in disintegration of the veneers, which made strength determination impossible. It was concluded that, in addition to cellulose, the hemicelluloses determine the f-strength under dry conditions, while lignin confers wet strength but appears not to contribute to interfi bre adhesion and f-strength under dry conditions."],["dc.identifier.doi","10.1515/hf.2011.173"],["dc.identifier.fs","590875"],["dc.identifier.isi","000304467600011"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9928"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91776"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Walter De Gruyter & Co"],["dc.relation.issn","1437-434X"],["dc.relation.issn","0018-3830"],["dc.relation.orgunit","Fakultät für Forstwissenschaften und Waldökologie"],["dc.rights","Goescholar"],["dc.rights.access","openAccess"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","dry strength; fi nite span; microtensile testing; micro-veneers; wet strength; zero span."],["dc.title","Effect of lignin and hemicelluloses on the tensile strength of micro-veneers determined at finite span and zero span"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","643"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Wood Science and Technology"],["dc.bibliographiccitation.lastpage","658"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Klueppel, Andre"],["dc.contributor.author","Mai, Carsten"],["dc.date.accessioned","2018-11-07T09:25:28Z"],["dc.date.available","2018-11-07T09:25:28Z"],["dc.date.issued","2013"],["dc.description.abstract","Scots pine (Pinus sylvestris L.) sapwood was impregnated with aqueous solutions of phenol formaldehyde and methylated melamine formaldehyde resins and subsequently cured in an oven. One set of specimens was cured in plastic bags to avoid drying (wet curing) while another set of samples was heated and water was allowed to freely evaporate (dry curing). Macroscopic resin distribution was investigated using X-ray densitometry and infrared spectroscopy (FTIR-ATR). During dry curing, the resins migrated to the wood surface resulting in a gradient. Wet curing resulted in even distribution of the resins because it was immobilized due to condensation and precipitation in the wood. Neither densitometry nor FTIR-ATR was found to be generally applicable for investigating resin distribution in modified wood. Wet curing resulted in low cell wall bulking as compared to dry curing, probably because resin precipitated before drying. Storing impregnated wood prior to curing under non-drying conditions (\"diffusion phase\") also reduced cell wall penetration and bulking."],["dc.description.sponsorship","Fachagentur Nachwachsende Rohstoffe (FNR) [22004407]"],["dc.identifier.doi","10.1007/s00226-013-0530-2"],["dc.identifier.fs","601057"],["dc.identifier.isi","000318292900015"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10985"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30072"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0043-7719"],["dc.rights.access","openAccess"],["dc.title","The influence of curing conditions on the chemical distribution in wood modified with thermosetting resins"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]