Produção Nacional
Development of a bio-based adhesive from Protium heptaphyllum resin
2021; Associação Brasileira de Polímeros; Volume: 31; Issue: 2 Linguagem: Inglês
10.1590/0104-1428.10020
ISSN1984-7386
AutoresMarcos Danilo Costa de Almeida, João Antônio Pessoa da Silva, Felipe Fernando da Costa Tavares, Ludmila Leite Araújo, Jefferson de Souza Zeferino, Ruth Marlene Campomanes Santana,
Tópico(s)Synthetic Organic Chemistry Methods
ResumoIn 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.
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