Effect of cellulose size-concentration on the structure of polyvinyl alcohol hydrogels.

Autor: de Lima GG; Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland. Electronic address: ggoetten@research.ait.ie., Ferreira BD; Departamento de Química, Universidade Federal do Paraná, Curitiba, Paraná, Brazil., Matos M; Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE, Universidade Federal do Paraná, Curitiba, Paraná, Brazil., Pereira BL; Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland., Nugent MJD; Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland., Hansel FA; Embrapa Florestas, Colombo, Brazil., Magalhães WLE; Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Embrapa Florestas, Colombo, Brazil. Electronic address: washington.magalhaes@embrapa.br.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2020 Oct 01; Vol. 245, pp. 116612. Date of Electronic Publication: 2020 Jun 11.
DOI: 10.1016/j.carbpol.2020.116612
Abstrakt: Microfibrillated cellulose as a reinforcement agent has been investigated extensively due to their unique characteristics, which can reorder the structure of polymers and hydrogels leading to improved mechanical properties with minimal disadvantages in terms of the targeted original applications. However, effect of using a macro- to a micro-fibrillated cellulose onto polyvinyl alcohol hydrogels is still unknown, because of the unique ability for both to be produced as hydrogels from freeze-thawing mechanisms - hydrogen bonding - there is a potential synergism. Therefore, macro and microfibrillated kraft bleached paper was synthesised at various concentrations on polyvinyl alcohol hydrogels. The overall effect presented a strong interaction between both compounds but it was increased with macrofibrillated cellulose. Increase in crystallinity was also observed with a macro-sized fibre without variation on tensile elastic modulus but an overall improvement was perceived on thermal properties and a slower swelling rate with a microfibrillated cellulose.
Competing Interests: Declaration of Competing Interest The authors declare that there are no conflicts of interest regarding the publication of this manuscript.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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