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In this study, it was aimed to use of bio-oil as an alternative to petroleum-based phenol in the production of phenol-formaldehyde (PF) resin used for making exterior plywood. Bio-oil obtained from pine wood sawdust using a vacuum pyrolysis reactor at 500 °C. The PF resol resins were produced by substituting up to 20 wt% of phenol with bio-oil by modifying the chemical synthesis process. FT-IR analysis was performed to characterize the organic functional groups in the bio-oil modified PF resins. In comparison to the commercial and lab-made PF resins, the bio-oil modified PF resins were found to have larger average molecular weights, higher polydispersity indices, and shorter gel times. Six different types of plywood panels were produced from the experimental PF resins which were commercial PF resin, lab-made PF resin, and PF resins modified with bio oil of 5, 10, 15 or 20 wt% contents, respectively. Plywood specimens produced with the PF resin modified with bio-oil up to 20 wt% had better tensile shear strength (wet condition), modulus of rupture, and modulus of elasticity in bending as compared to the commercial and lab-made PF resins. PROPRIEDADES TECNOLÓGICAS DE COMPENSADO DE MADEIRA COLADA COM RESINA DE RESOL FENOL-FORMALDEÍDO SINTETIZADA COM BIO-ÓLEO RESUMO: Neste estudo, teve como obejtivo usar o bio-óleo como alternativa ao fenol à base de petróleo na produção de resina de fenol-formaldeído (PF) utilizada na fabricação de compensado exterior. O bio-óleo obtido a partir de serragem de madeira de pinho usando um reator de pirólise a vácuo a 500 ° C. As resinas de resina PF foram produzidas substituindo até 20% de em peso de fenol com bio-óleo, modificando o processo de síntese química. A análise FT-IR foi realizada para caracterizar os grupos funcionais orgânicos do bio-óleo pelas resinas PF. Em comparação com as resinas de PF comerciais e feitas em laboratório, as resinas de PF modificadas com bio-óleo apresentaram pesos moleculares médios maiores, índices de polidispersão mais altos e tempos de gel mais curtos. Seis diferentes tipos de painéis de compensado foram produzidos a partir das resinas PF experimentais que eram resina PF comercial, resina PF feita em laboratório e resinas PF modificadas com óleo biológico com conteúdo de 5, 10, 15 ou 20% em peso, respectivamente. As amostras de compensado produzidas com a resina PF modificada com bio-óleo até 20% em peso apresentaram maior força de cisalhamento de tração (condição úmida), módulo de ruptura e módulo de elasticidade em flexão em comparação com as resinas PF comerciais e feitas em laboratório.

TECHNOLOGICAL PROPERTIES OF PLYWOOD BONDED WITH PHENOL-FORMALDEHYDE RESOL RESIN SYNTHESIZED WITH BIO-OIL