Polyurethane derived from castor oil reinforced with long cotton fibers: Static and dynamic testing of a novel eco-friendly composite material

Autor(es)

da Costa, Romeu R. C. ^[1] ; Sato, Eduardo S. ^[2] ; Ribeiro, Marcelo L. ^[2] ; de Medeiros, Ricardo ^[3] ; Vieira, Andre F. C. ^[4] ; Guedes, Rui M. ^[5] ; Tita, Volnei ^[2]

Afiliação do(s) autor(es)

^[1] Parana Fed Tech Univ, Dept Mech Engn, UTFPR, Curitiba, Parana - Brazil

^[2] Univ Sao Paulo, Sao Carlos Sch Engn, EESC USP, Dept Aeronaut Engn, Sao Paulo - Brazil

^[3] Santa Catarina State Univ, Dept Mech Engn, UDESC, Florianopolis, SC - Brazil

^[4] Univ Beira Interior, Electromech Engn Dept, Covilha - Portugal

^[5] Univ Porto, Mech Engn Dept, Fac Engn, Porto - Portugal

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF COMPOSITE MATERIALS; v. 54, n. 22 MAR 2020.
• Citações Web of Science: 0

Resumo

A novel eco-friendly composite material made of polyurethane derived from castor oil reinforced with long cotton fibers was developed. A set of comparative analyses comprising static and dynamic tests was established using specimens made of castor oil-based polyurethane reinforced by glass fibers, and epoxy reinforced by glass and cotton fibers. The manufacturing method and estimation of fiber volume fraction of the specimens were described in detail. Tensile and flexural tests were performed to evaluate the mechanical performance of the novel laminate. Fractographic post-mortem examinations assessed the quality of the fiber-matrix interaction and allowed direct observation of the failure modes. Surface treatment of natural fibers appears necessary to improve the adhesion of the natural fibers to the matrix. Dynamic responses are discussed, considering natural frequencies and modal damping coefficients. In this context, the potentialities and the limitations of using the novel eco-friendly composite material as structural parts are discussed. (AU)

• Processo FAPESP: 12/01047-8 - Desenvolvimento de um critério para previsão da resistência residual de estruturas em material compósito danificadas por impacto
• Beneficiário: Ricardo de Medeiros
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/13844-8 - Formulação de elementos finitos e modelos de delaminação para material compósito laminado.
• Beneficiário: Marcelo Leite Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular