Synthesis and Characterization of a Bio-Based Resin from Linseed Oil

Authors

  • Arunjunai Raj Mahendran,

    Corresponding author
    1. Wood Carinthian Competence Center (W3C), Kompetenzzentrum Holz GmbH, Klagenfurterstrasse 87-89, A-9300 St. Veit an der Glan, Austria
    • Wood Carinthian Competence Center (W3C), Kompetenzzentrum Holz GmbH, Klagenfurterstrasse 87-89, A-9300 St. Veit an der Glan, Austria.
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  • Nicolai Aust,

    1. Department of Chemistry of Polymeric Materials, University of Leoben, Otto Glöckel-Straße 2, A-8700 Leoben, Austria
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  • Günter Wuzella,

    1. Wood Carinthian Competence Center (W3C), Kompetenzzentrum Holz GmbH, Klagenfurterstrasse 87-89, A-9300 St. Veit an der Glan, Austria
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  • Andreas Kandelbauer

    1. School of Applied Chemistry, Reutlingen University, Alteburgstrasse 150, D-72762 Reutlingen, Germany
    2. Department of Wood Science and Technology, University of Natural Resources and Life Sciences, Peter Jordan Strasse 82, A-1190 Vienna, Austria
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Abstract

Summary: The use of renewable raw materials in the polymer industries is becoming increasingly popular because of environmental concerns and the need to substitute fossil resources. Plant oils with triglyceride backbones can be chemically modified and used to synthesize polymers from renewable resources (biopolymers). In the present study, linseed oil was epoxidized using a chemo-enzymatic method based on Candida Antarctica lipase B (CALB) as a biocatalyst and the modified linseed oil was cured using maleinated linseed oil and a commercial polyamide resin. The amount of epoxidation achieved depended on the amount of lipase used and was determined by infrared (IR) and nuclear magnetic resonance (NMR) spectroscopies. With 20% (weight per weight) catalyst concentration based on the wt % of oil a degree of epoxidation of > 90% was achieved. The cross-linking reaction of epoxidized linseed oil with the maleinated linseed oil and the polyamide resin was studied using differential scanning calorimetry (DSC). DSC traces showed that an increase in epoxidation degree lead to larger values for the exothermic enthalpy integrals of the curing reactions and hence to a higher reactivity of the linseed oil towards the cross-linking agents.

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