Impact of incorporating nanosilica on the properties of bio-based polyurethane films created from cellulose and lignin as polyols during the polymerization process - Pereira, Diego Beltrame; Habitzreuter, Filipe Biagioni; Ramos, Luiz Antônio; Nascimento, Ana Carolina da Cunha; Porto, Andre Luiz Meleiro; Frollini, Elisabete (Brazil MRS Meeting, 2025)