Effect of the Micronization of Pulp Fibers on the Properties of Green Composites
| Autor: | Armando J. D. Silvestre, Carmen S. R. Freire, Carla Vilela, Bruno F. A. Valente, Carlos Pascoal Neto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
cellulose fibers Polyesters Glass fiber Pharmaceutical Science Hydroxybutyrates Organic chemistry engineering.material poly(hydroxybutyrate) Article Analytical Chemistry Nanocomposites QD241-441 Flexural strength Tensile Strength Drug Discovery Ultimate tensile strength Fiber Physical and Theoretical Chemistry Composite material Micronization Cellulose Melt flow index Eucalyptus green composites Pulp (paper) Cellulose fiber micronization Chemistry (miscellaneous) engineering Wettability Molecular Medicine poly(lactic acid) |
| Zdroj: | Molecules, Vol 26, Iss 5594, p 5594 (2021) Molecules Volume 26 Issue 18 |
| ISSN: | 1420-3049 |
| Popis: | Green composites, composed of bio-based matrices and natural fibers, are a sustainable alternative for composites based on conventional thermoplastics and glass fibers. In this work, micronized bleached Eucalyptus kraft pulp (BEKP) fibers were used as reinforcement in biopolymeric matrices, namely poly(lactic acid) (PLA) and poly(hydroxybutyrate) (PHB). The influence of the load and aspect ratio of the mechanically treated microfibers on the morphology, water uptake, melt flowability, and mechanical and thermal properties of the green composites were investigated. Increasing fiber loads raised the tensile and flexural moduli as well as the tensile strength of the composites, while decreasing their elongation at the break and melt flow rate. The reduced aspect ratio of the micronized fibers (in the range from 11.0 to 28.9) improved their embedment in the matrices, particularly for PHB, leading to superior mechanical performance and lower water uptake when compared with the composites with non-micronized pulp fibers. The overall results show that micronization is a simple and sustainable alternative for conventional chemical treatments in the manufacturing of entirely bio-based composites. |
| Databáze: | OpenAIRE |
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