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Hydrophobic materials based on cotton linter cellulose and an epoxy-activated polyester derived from a suberin monomer
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.ORCID iD: 0000-0002-7055-1057
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Innventia AB, Drottning Kristinas väg 61, SE-114 86 Stockholm, Sweden.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
2015 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434XArticle in journal, Editorial material (Refereed) Published
Abstract [en]

Suberin is a natural hydrophobic material that could be used to improve the water repellency of cellulose surfaces. It is also abundant in the outer bark of birch (Betula verrucosa); birch bark is a side-stream product in Scandinavia from the forest industry, which is generally burned for energy production. A suberin monomer, cis-9,10-epoxy-18-hydroxyoctadecanoic acid, was isolated from birch outer bark and polymerized via lipase (immobilized Candida antarctica lipase B). The resulting epoxy-activated polyester was characterized by nuclear magnetic resonance (NMR) imaging, matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry, and size exclusion chromatography. Then the polyester was cured with tartaric or oxalic acid, and the crosslinked polyesters were characterized by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry. Hydrophobic materials were prepared by compression molding of polyester-impregnated cellulose sheets, and the final products were characterized by FTIR, cross-polarization magic angle spinning 13 C NMR, and field-emission scanning electron microscopy. The water contact angle was significantly increased from 0 ° for the original cellulose sheets to over 100 ° for the produced hydrophobic materials.

Place, publisher, year, edition, pages
Walter de Gruyter, 2015.
Keyword [en]
cellulose, epoxy acid, hydrophobic, polyester, suberin
National Category
Polymer Chemistry
URN: urn:nbn:se:kth:diva-166256DOI: 10.1515/hf-2014-0261ISI: 000358410200008ScopusID: 2-s2.0-84958524574OAI: diva2:810109
WOBAMA - Wood based materials and fuels

QC 20150604

Available from: 2015-05-06 Created: 2015-05-06 Last updated: 2015-09-01Bibliographically approved

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Li, DongfangIversen, TommyEk, Monica
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