Mold heat conductance as drive force for tuning freeze-casted nanocellulose foams microarchitecture

Autor(es)

Mariano, Marcos ^[1] ; Bernardes, Juliana da Silva ^[1] ; Strauss, Mathias ^[1]

Afiliação do(s) autor(es)

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 225, p. 167-170, AUG 15 2018.
• Citações Web of Science: 4

Resumo

The influence of ice-crystals growing direction over the organization of cellulose nanofibers as freezecasted foams is reported. This tuning was achieved by changing the metallic (copper) area of the sample molds which altered the freezing-front behavior, causing an oriented foam structure in certain directions. This orientation imparted different microarchitectures to the foams, leading to different pores sizes and wall thicknesses which could be characterized by advanced image techniques based on microtomography. As consequence, mechanical properties, such as compression modulus, have changed. In this study, a statistical approach is used to validate all the results obtained. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/04514-7 - Estudo do uso de nanopartículas de celulose no controle reológico de fluidos complexos
• Beneficiário: Juliana da Silva Bernardes
• Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular