The Hydrophobicity of Lignocellulosic Fiber Network Can Be Enhanced with Suberin Fatty Acids

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dc.contributor University of Helsinki, Department of Food and Nutrition en
dc.contributor University of Helsinki, Department of Food and Nutrition en
dc.contributor.author Korpinen, Risto I.
dc.contributor.author Kilpeläinen, Petri
dc.contributor.author Sarjala, Tytti
dc.contributor.author Nurmi, Maristiina
dc.contributor.author Saloranta, Pauliina
dc.contributor.author Holmbom, Thomas
dc.contributor.author Koivula, Hanna
dc.contributor.author Mikkonen, Kirsi S.
dc.contributor.author Willför, Stefan
dc.contributor.author Saranpää, Pekka T.
dc.date.accessioned 2020-02-04T07:15:31Z
dc.date.available 2020-02-04T07:15:31Z
dc.date.issued 2019
dc.identifier.citation Korpinen , R I , Kilpeläinen , P , Sarjala , T , Nurmi , M , Saloranta , P , Holmbom , T , Koivula , H , Mikkonen , K S , Willför , S & Saranpää , P T 2019 , ' The Hydrophobicity of Lignocellulosic Fiber Network Can Be Enhanced with Suberin Fatty Acids ' , Molecules , vol. 24 , no. 23 , 4391 . https://doi.org/10.3390/molecules24234391 en
dc.identifier.issn 1420-3049
dc.identifier.other PURE: 128657343
dc.identifier.other PURE UUID: c2287c12-3509-4774-87db-b638f188bb80
dc.identifier.other Bibtex: molecules24234391
dc.identifier.other ORCID: /0000-0002-9717-0465/work/68616128
dc.identifier.other ORCID: /0000-0003-4490-5912/work/68618456
dc.identifier.other WOS: 000507294400190
dc.identifier.uri http://hdl.handle.net/10138/310930
dc.description.abstract Suberin fatty acids were extracted from outer bark of Silver birch (Betula pendula Roth.) using an isopropanolic sodium hydroxide solution. Laboratory sheets composed of lignocellulosic fiber networks were prepared from unbleached and unrefined softwood kraft pulp and further impregnated with suberin fatty acid monomers and cured with maleic anhydride in ethanol solution. The treatment resulted in hydrophobic surfaces, in which the contact angles remained over 120 degrees during the entire measurement. The fiber network also retained its water vapor permeability and enhanced fiber–fiber bonding resulted in improved tensile strength of the sheets. Scanning electron microscopy (SEM) images revealed that the curing agent, together with suberin fatty acids, was evenly distributed on the fiber surfaces and smoothing occurred over the wrinkled microfibrillar structure. High concentrations of the curing agent resulted in globular structures containing betulinol derivates as revealed with time-of-flight secondary ion mass spectrometry (ToF-SIMS). Also, the larger amount of suberin fatty acid monomers slightly impaired the optical properties of sheets. en
dc.format.extent 14
dc.language.iso eng
dc.relation.ispartof Molecules
dc.relation.uri https://www.mdpi.com/1420-3049/24/23/4391
dc.rights en
dc.subject 416 Food Science en
dc.subject 116 Chemical sciences en
dc.title The Hydrophobicity of Lignocellulosic Fiber Network Can Be Enhanced with Suberin Fatty Acids en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.3390/molecules24234391
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
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