Development of a bio-based adhesive from Protium heptaphyllum resin

Abstract In this work, a bio-based adhesive is prepared from Protium heptaphyllum resin. The resin is first characterized by 1H and 13C nuclear magnetic resonance spectroscopy and the bioadhesive is then prepared using a simple mixture of the resin with linseed oil, catalyzed by cobalt octanoate, to...

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Published inPolímeros, ciência e tecnologia Vol. 31; no. 2
Main Authors Almeida, Marcos Danilo Costa de, Silva, João Antonio Pessoa da, Tavares, Felipe Fernando da Costa, Araujo, Ludmila Leite, Zeferino, Jefferson de Souza, Santana, Ruth Marlene Campomanes
Format Journal Article
LanguageEnglish
Published Associação Brasileira de Polímeros 01.01.2021
Subjects
adhesive
linseed oil
Protium heptaphyllum
reticulation reaction
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Summary:Abstract In this work, a bio-based adhesive is prepared from Protium heptaphyllum resin. The resin is first characterized by 1H and 13C nuclear magnetic resonance spectroscopy and the bioadhesive is then prepared using a simple mixture of the resin with linseed oil, catalyzed by cobalt octanoate, to induce crosslinking. The precursors and bioadhesive obtained are characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). The NMR analysis shows the presence of groups of triterpenes, such as α- and β-amyrins, and diols, such as brein and maniladiol. Thermogravimetric analysis reveals that the resin has less thermal stability than the bioadhesive. Mechanical tests indicate that the bioadhesive has greater adhesion strength compared to the commercial adhesive, reaching an average stress at break of 7.66 and 0.113 MPa for the wood and carbon steel substrates, respectively. In conclusion, the bioadhesive can be used for the production of composites.
ISSN:0104-1428
1678-5169
DOI:10.1590/0104-1428.10020