Ecocomposites Based on High-Impact Polystyrene (HIPS) and Amazon Açaí (Euterpe oleracea) Fibers: Influence of NaOH Treatment on Its Structural, Thermal, and Mechanical Properties

Silva, E. C.; Silva, A. F. da; Rodrigues, Y. S. da; Júnior, D. S. Correia; Oliveira, Larissa Medeiros de; Biondo, Matheus Moraes; Felix, P. H. C.; Sales, Helder Belato Espindola; Sanches, Edgar Aparecido

doi:10.1007/s11029-023-10087-w

Cited by 2 publications

(1 citation statement)

References 51 publications

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“…These discoveries pave the way for innovative applications of açaí waste in sectors such as automotive and construction, where there is a growing demand for sustainable and high-performance materials (Martins et al, 2008). In the area of cementitious composites, Silva et al (2023b) observe that the alkaline treatment of açaí fibers significantly improves their adhesion to the cement matrix, resulting in composites with superior mechanical properties. This advance suggests a valuable new application for açaí leaves, usually discarded as waste, contributing to the development of more sustainable and efficient construction materials.…”

Section: Innovative Applications Of Waste In Compositesmentioning

confidence: 98%

Potential Application of Açaí Seed Waste in Biodegradable Polymeric Composites such as PBAT: a review regarding this issue

Costa,

Monteiro,

Oliveira

et al. 2024

JER

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Section: Innovative Applications Of Waste In Compositesmentioning

confidence: 98%

Potential Application of Açaí Seed Waste in Biodegradable Polymeric Composites such as PBAT: a review regarding this issue

Costa,

Monteiro,

Oliveira

et al. 2024

JER

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Amazon açaí fibre–Portland cement compatibility: a challenge to produce cement-bonded fibreboards?

Oliveira,

Souza,

Ferreira

et al. 2024

Advances in Cement Research

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The açaí waste from Amazon contains short fibers that show potential for reinforcing cement-bonded fiberboards (CBFBs), although their compatibility with cement matrix is still unknown. This work aimed to characterize raw and pretreated açaí fibers and analyze their compatibility with Portland cement by different techniques, besides developing a CBFB. The fibers were subjected to thermal (180, 200, and 220 °C), cold and hot water, alkaline (NaOH), and bleaching (NaOH-H2O2) pretreatments. The chemical and water pretreatments raised the fiber crystalline indexes (28%-57%). The chemical pretreatments individualized the fiber bundles and removed hemicelluloses. Alkali-pretreated and raw fibers had the highest (96%) and lowest (65%) cement compatibility indexes. Portlandite and ettringite appeared after 24 h for most pastes but were delayed for raw and 220 °C-pretreated fibers. In contrast, only the raw fiber specimens reached the required compression strength of 34 MPa after 28 days; hence, they were chosen to produce a CBFB. The boards showed proper thickness swelling (1.4%), but low bending strength (MOE = 647.8 MPa; MOR = 1.9 MPa). Overall, the fiber modifications improved the compatibility with cement, but not the composite's mechanical strength. Açai-fiber CBFB is a promising building material, but future studies must overcome its poor mechanical performance.

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Ecocomposites Based on High-Impact Polystyrene (HIPS) and Amazon Açaí (Euterpe oleracea) Fibers: Influence of NaOH Treatment on Its Structural, Thermal, and Mechanical Properties

Cited by 2 publications

References 51 publications

Potential Application of Açaí Seed Waste in Biodegradable Polymeric Composites such as PBAT: a review regarding this issue

Potential Application of Açaí Seed Waste in Biodegradable Polymeric Composites such as PBAT: a review regarding this issue

Amazon açaí fibre–Portland cement compatibility: a challenge to produce cement-bonded fibreboards?

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