Data/hora: 04/06/2024 02:32:36

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 12/05/2020
Data da última atualização: | 27/05/2020
Autoria: | MATTOS, B. D.; TARDY, B. L.; GRECA, L. G.; KÄMÄRÄINEN, T.; XIANG, W.; CUSOLA, O.; MAGALHAES, W. L. E.; ROJAS, O. J.
Afiliação: | SCHOOL OF CHEMICAL ENGINEERING, AALTO UNIVERSITY; SCHOOL OF CHEMICAL ENGINEERING, AALTO UNIVERSITY; SCHOOL OF CHEMICAL ENGINEERING, AALTO UNIVERSITY; SCHOOL OF CHEMICAL ENGINEERING, AALTO UNIVERSITY; SCHOOL OF CHEMICAL ENGINEERING, AALTO UNIVERSITY; UNIVERSITAT POLITÈCNICA DE CATALUNYA, ESCOLA SUPERIOR D’ENGINYERIES INDUSTRIAL, AEROESPACIAL I AUDIOVISUAL DE TERRASSA; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; SCHOOL OF CHEMICAL ENGINEERING, AALTO UNIVERSITY.
Título: | Nanofibrillar networks enable universal assembly of superstructured particle constructs.
Ano de publicação: | 2020
Fonte/Imprenta: | Science Advances, v. 6, n. 19, eaaz7328, May 2020.
ISBN: | 2375-2548
DOI: | https://doi.org/10.1126/sciadv.aaz7328
Idioma: | Inglês
Conteúdo: | Superstructured colloidal materials exploit the synergies between components to develop new or enhanced functions. Cohesion is a primary requirement for scaling up these assemblies into bulk materials, and it has only been fulfilled in case-specific bases. Here, we demonstrate that the topology of nanonetworks formed from cellulose nanofibrils (CNFs) enables robust superstructuring with virtually any particle. An intermixed network of fibrils with particles increases the toughness of the assemblies by up to three orders of magnitude compared, for instance, to sintering. Supramolecular cohesion is transferred from the fibrils to the constructs following a power law, with a constant decay factor for particle sizes from 230 nm to 40 ?m. Our findings are applicable to other nanofiber dimensions via a rationalization of the morphological aspects of both particles and nanofibers. CNFbased cohesion will move developments of functional colloids from laboratory-scale toward their implementation in large-scale nanomanufacturing of bulk materials.
Palavras-Chave: | Nanocellulose; Nanofibrilla.
Thesagro: | Celulose.
Thesaurus Nal: | Cellulose.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (57297-1) - UPC - AP - DD -  -  -  - DIS