Matches in SemOpenAlex for { <https://semopenalex.org/work/W1492147304> ?p ?o ?g. }
Showing items 1 to 81 of
81
with 100 items per page.
- W1492147304 endingPage "129" @default.
- W1492147304 startingPage "123" @default.
- W1492147304 abstract "The surface properties of three Elementary Chlorine Free (ECF) bleached hardwood kraft pulps were determined before and after ageing. The intention was to evaluate the differences in fibre surface properties between different hardwood species and, in particular, to determine the influence of ageing on these pulps. The characteristics of the fibre surfaces were determined by measuring the dynamic contact angle (DCA) and using Electron Spectroscopy for Chemical Analysis (ESCA) and Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). The correlation between the fibre surface properties and the sizing efficiency of the pulps was measured by comparing the amount of alkyl ketene dimer (AKD) required to reach a certain level of water absorption determined by Cobb{60}. The study showed that there were measurable differences in the sizing efficiency of the hardwood pulps studied: Eucalyptus urograndis, Eucalyptus globulus and Betula ssp. The birch pulp was more hydrophilic and required more AKD to reach a certain water absorption value, especially before ageing. The surface properties of the pulps became more hydrophobic after ageing due to an increasing amount of extractives, particularly of fatty acids and fatty acids salts, but also of sterols and glycerides on the fibre surfaces. A migration of these components from the interior of the fibre wall to the fibre surface during ageing was suggested based on ToF-SIMS. The amount of AKD necessary for a certain pulp grade seemed to be related to the hydrophobicity of the fibre surfaces and correlated to the coverage of extractives on the fibre surface. The results indicated that DCA measurements can be used to postulate changes in the hydrophobicity of the fibres and thereby predict necessary changes in sizing strategy in the production of paper." @default.
- W1492147304 created "2016-06-24" @default.
- W1492147304 creator A5019791830 @default.
- W1492147304 creator A5059966656 @default.
- W1492147304 date "2009-03-01" @default.
- W1492147304 modified "2023-10-01" @default.
- W1492147304 title "Aspects on the AKD demand of hardwood kraft pulps before and after ageing" @default.
- W1492147304 hasPublicationYear "2009" @default.
- W1492147304 type Work @default.
- W1492147304 sameAs 1492147304 @default.
- W1492147304 citedByCount "0" @default.
- W1492147304 crossrefType "journal-article" @default.
- W1492147304 hasAuthorship W1492147304A5019791830 @default.
- W1492147304 hasAuthorship W1492147304A5059966656 @default.
- W1492147304 hasConcept C106486073 @default.
- W1492147304 hasConcept C127413603 @default.
- W1492147304 hasConcept C142724271 @default.
- W1492147304 hasConcept C159985019 @default.
- W1492147304 hasConcept C185592680 @default.
- W1492147304 hasConcept C188442228 @default.
- W1492147304 hasConcept C192562407 @default.
- W1492147304 hasConcept C2776491502 @default.
- W1492147304 hasConcept C2779752776 @default.
- W1492147304 hasConcept C2780674770 @default.
- W1492147304 hasConcept C500499127 @default.
- W1492147304 hasConcept C528095902 @default.
- W1492147304 hasConcept C54355233 @default.
- W1492147304 hasConcept C59822182 @default.
- W1492147304 hasConcept C6556556 @default.
- W1492147304 hasConcept C71924100 @default.
- W1492147304 hasConcept C86803240 @default.
- W1492147304 hasConcept C99148416 @default.
- W1492147304 hasConceptScore W1492147304C106486073 @default.
- W1492147304 hasConceptScore W1492147304C127413603 @default.
- W1492147304 hasConceptScore W1492147304C142724271 @default.
- W1492147304 hasConceptScore W1492147304C159985019 @default.
- W1492147304 hasConceptScore W1492147304C185592680 @default.
- W1492147304 hasConceptScore W1492147304C188442228 @default.
- W1492147304 hasConceptScore W1492147304C192562407 @default.
- W1492147304 hasConceptScore W1492147304C2776491502 @default.
- W1492147304 hasConceptScore W1492147304C2779752776 @default.
- W1492147304 hasConceptScore W1492147304C2780674770 @default.
- W1492147304 hasConceptScore W1492147304C500499127 @default.
- W1492147304 hasConceptScore W1492147304C528095902 @default.
- W1492147304 hasConceptScore W1492147304C54355233 @default.
- W1492147304 hasConceptScore W1492147304C59822182 @default.
- W1492147304 hasConceptScore W1492147304C6556556 @default.
- W1492147304 hasConceptScore W1492147304C71924100 @default.
- W1492147304 hasConceptScore W1492147304C86803240 @default.
- W1492147304 hasConceptScore W1492147304C99148416 @default.
- W1492147304 hasIssue "2" @default.
- W1492147304 hasLocation W14921473041 @default.
- W1492147304 hasOpenAccess W1492147304 @default.
- W1492147304 hasPrimaryLocation W14921473041 @default.
- W1492147304 hasRelatedWork W141940965 @default.
- W1492147304 hasRelatedWork W1557839930 @default.
- W1492147304 hasRelatedWork W1980101561 @default.
- W1492147304 hasRelatedWork W1984007327 @default.
- W1492147304 hasRelatedWork W1989213966 @default.
- W1492147304 hasRelatedWork W2013131657 @default.
- W1492147304 hasRelatedWork W2032715648 @default.
- W1492147304 hasRelatedWork W2034269068 @default.
- W1492147304 hasRelatedWork W2049083550 @default.
- W1492147304 hasRelatedWork W2074730963 @default.
- W1492147304 hasRelatedWork W21365206 @default.
- W1492147304 hasRelatedWork W2143498030 @default.
- W1492147304 hasRelatedWork W220997485 @default.
- W1492147304 hasRelatedWork W2253571673 @default.
- W1492147304 hasRelatedWork W2289856240 @default.
- W1492147304 hasRelatedWork W352461918 @default.
- W1492147304 hasRelatedWork W4490364 @default.
- W1492147304 hasRelatedWork W626406020 @default.
- W1492147304 hasRelatedWork W2510511150 @default.
- W1492147304 hasRelatedWork W52830404 @default.
- W1492147304 hasVolume "62" @default.
- W1492147304 isParatext "false" @default.
- W1492147304 isRetracted "false" @default.
- W1492147304 magId "1492147304" @default.
- W1492147304 workType "article" @default.