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Title: | Fibers pre-treatments with sodium silicate affect the properties of suspensions, films, and quality index of cellulose micro/nanofibrils |
Authors: | Tonoli, Gustavo Henrique Denzin |
Keywords: | Microfibrilas de celulose Nanofibrilas de celulose Suspensões de fibras Filmes biofuncionais Pre-tratamento com silicato de sódio Propriedades de barreira Propriedades mecânicas Cellulose microfibrils Cellulose nanofibrils Fiber suspensions Biofunctional films Sodium silicate pretreatment Barrier properties Mechanical properties |
Issue Date: | 19-Jul-2022 |
Publisher: | De Gruyter |
Citation: | MASCARENHAS, Adriano Reis Prazeres; SCATOLINO, Mário Vanoli; DIAS, Matheus Cordazzo; MARTINS, Maria Alice; MELO, Rafael Rodolfo; DAMÁSIO, Renato Augusto Pereira; MENDONÇA, Maressa Carvalho; TONOLI, Gustavo Henrique Denzin. Fibers pre-treatments with sodium silicate affect the properties of suspensions, films, and quality index of cellulose micro/nanofibrils. Nordic Pulp & Paper Research Journal, Berlim, v. 37, n. 3, 2022. DOI: 10.1515/npprj-2022-0037. Disponível em: https://doi.org/10.1515/npprj-2022-0037. Acesso em: 24 set. 2024. |
Abstract: | The characteristics of cellulose micro/nanofibrils (MFC/CNF) can be improved with pre-treatments of the original fibers. The present work is proposed to study pre-treatment with sodium silicate (Na2SiO3) on bleached fibers of Eucalyptus sp. (EUC) and Pinus sp. (PIN) and its effects on the quality index of MFC/CNF. Particle homogeneity, turbidity, and microstructure of the suspensions were evaluated. Similarly, the physical-mechanical, and barrier properties of the films were studied. With the results obtained for suspensions and films, the quality index (QI) was MFC/CNF calculated. The smallest particle dimension was observed for MFC/CNF of Pinus sp. with 10 % of Na2SiO3, as well as the lowest turbidity (∼350 NTU) was obtained for MFC/CNF of Pinus sp. with 5 % of Na2SiO3. The pre-treatments reduced the transparency of the films by ∼25 % for EUC and ∼20 % for PIN. The films presented a suitable barrier to UVC radiation, water vapor, and oil. The tensile strength of EUC and PIN films was increased by 20 % using 10 % of Na2SiO3. The same concentration of Na2SiO3 provided QI 70 for EUC MFC/CNF. The Na2SiO3 was efficient to obtain the MFC/CNF with interesting properties and suitable to generate films with parameters required for packaging. |
Description: | As licenças de acesso aberto aplicáveis a este artigo estão em conformidade com as políticas do periódico em que foi publicado, disponíveis no link: https://v2.sherpa.ac.uk/id/publication/36461. Consulta realizada em 24 de set. de 2024. |
URI: | https://doi.org/10.1515/npprj-2022-0037 http://repositorio.ufla.br/jspui/handle/1/59495 |
Appears in Collections: | DCF - Artigos publicados em periódicos |
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