| Texto completo | |
| Autor(es): |
Kaschuk, Joice Jaqueline
[1, 2]
;
Borghei, Maryam
[2]
;
Solin, Katariina
[2]
;
Tripathi, Anurodh
[3, 2]
;
Khakalo, Alexey
[4]
;
Leite, Fabio A. S.
[5]
;
Branco, Aida
[6]
;
de Sousa, Miriam C. Amores
[5]
;
Frollini, Elisabete
[1]
;
Rojas, Orlando J.
[7, 2, 8]
Número total de Autores: 10
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Chem Sao Carlos, Macromol Mat & Lignocellulos Fibers Grp, Ctr Res Sci & Technol BioResources, BR-13560970 Sao Carlos, SP - Brazil
[2] Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, FI-00076 Espoo - Finland
[3] North Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 - USA
[4] VTT Tech Res Ctr Finland Ltd, FI-02044 Espoo - Finland
[5] Ynvisible GmbH, D-79108 Freiburg - Germany
[6] Ynvisible SA, P-2820690 Charneca Da Caparica - Portugal
[7] Univ British Columbia, Dept Wood Sci, Vancouver, BC V6T 1Z3 - Canada
[8] Univ British Columbia, Bioprod Inst, Dept Chem & Biol Engn, Dept Chem, Vancouver, BC V6T 1Z3 - Canada
Número total de Afiliações: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS APPLIED POLYMER MATERIALS; v. 3, n. 5, p. 2393-2401, MAY 14 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
We studied the surface and microstructure of cellulose acetate (CA) films to tailor their barrier and mechanical properties for application in electrochromic devices (ECDs). Cross-linking of CA was carried out with pyromellitic dianhydride to enhance the properties relative to unmodified CA: solvent resistance (by 43% in acetone and 37% in DMSO), strength (by 91% for tensile at break), and barrier (by 65% to oxygen and 92% to water vapor). Surface modification via tetraethyl orthosilicate and octyltrichlorosilane endowed the films with hydrophobicity, stiffness, and further enhanced solvent resistance. A detailed comparison of structural, chemical, surface, and thermal properties was performed by using X-ray diffraction, dynamic mechanical analyses, Fourier-transform infrared spectroscopy, and atomic force microscopy. Coplanar ECDs were synthesized by incorporating a hydrogel electrolyte comprising TEMPO-oxidized cellulose nanofibrils and an ionic liquid. When applied as the top layer in the ECDs, cross-linked and hydrophobized CA films extended the functionality of the assembled displays. The results indicate excellent prospects for CA films in achieving environmental-friendly ECDs that can replace poly(ethylene terephthalate)-based counterparts. (AU) | |
| Processo FAPESP: | 17/13500-2 - Ultrafinas e nanofibras a partir de soluções de acetato de celulose: aplicação em células solares |
| Beneficiário: | Joice Jaqueline Kaschuk |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |