Effect of water absorption on the mechanical properties of poly(3-hydroxybutyrate)/vegetable fiber composites

Marinho, Vithória A. D.; Carvalho, Laura H.; Canedo, Eduardo L.

doi:10.1063/1.4918421

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…However, the absorption process is slow, and becomes slower as filler content increases. For example, a compound with 10% babassu reaches about one-third of the saturation value within 48 h (two days) immersion in water [13]. The diffusion coefficient of water in the PHB/babassu compounds, computed from the kinetic constant is about 0.010 mm 2 /h ≈ 2.8⋅10 -8 cm 2 /s at ambient temperature, indicating that this composite if wetted and dried not too long afterwards will not absorb water and thus will not warp or change dimensions, which is interesting for practical applications.…”

Section: Resultsmentioning

confidence: 99%

Water Sorption of Vegetable Fiber Reinforced Polymer Composites

Carvalho

Lima

Canedo

et al. 2016

DDF

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Despite the ever-growing worldwide interest in the use of lignocellulosic fibers as reinforcement in either thermoset or thermoplastic matrices, the use of these fibers to replace synthetic ones, is limited. The reasons for these limitations are associated with the vegetable fiber’s heterogeneity, lower compatibility to most polymers, inferior durability, flammability, poorer mechanical properties and higher moisture absorption when compared with synthetic fibers. Nevertheless, despite these drawbacks, vegetable fiber reinforced polymer composites are lighter in weight, more sustainable and can be used for non-structural products. Strategies to minimize these drawbacks include fiber and or matrix modification, the use of compatibilizers, fiber drying and the concomitant use of vegetable and synthetic fibers, for the production of hybrid composites, the latter being an unquestionable way to increment overall mechanical and thermal properties of these hybrid systems. Here we present data on the water sorption of polymer composites having thermoset and thermoplastic matrices as a function of vegetable fiber identity, content and hybridization with glass fibers. Our data indicates that, regardless if the matrix is a thermoset of a thermoplastic, water absorption tends to be relatively independent of vegetable fiber identity and to be significantly dependent of its content. Fiber drying prior to composite manufacturing and hybridization with glass fibers leads to lower overall water absorption and higher mechanical properties.

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Section: Resultsmentioning

confidence: 99%

Water Sorption of Vegetable Fiber Reinforced Polymer Composites

Carvalho

Lima

Canedo

et al. 2016

DDF

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“…Similarly, films of carboxymethyl cellulose/starch reinforced with cellulose nanocrystals, fish gelatin films conjugated with carboxymethyl cellulose, and gum arabic films [43] have low mechanical properties. Polyhydroxybutyrate and vegetable fibre composites have also shown lower mechanical strength due to lower molecular weight [44].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Environmentally benign alginate extraction and fibres spinning from different European Brown algae species

Silva

Badruddin

Tonon

et al. 2023

International Journal of Biological Macromolecules

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“…After 2 weeks of aging, the tensile strength decreased slightly by almost 10% for the PHBV/wood fibers (15wt%) compared with that of the unexposed sample. Marinho et al [24] studied the effect of water absorption on the performance of PHB/babassu fibers biocomposites loaded at different filler content ratios, that is, 5, 10, and 20wt%. The authors concluded that the absorption process became slower as the fiber content increased.…”

Section: Introductionmentioning

confidence: 99%

Effects of hygrothermal aging on chemical, physical, and mechanical properties of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate)/Cloisite 30B bionanocomposite

Iggui

Kaci

Moigne³

et al. 2021

Polymer Composites

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Hygrothermal aging of neat poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and PHBV filled with an organomodified montmorillonite (C30B) at 3wt. was investigated at 65 C and 100% relative humidity (RH) up to 100 days. FT-IR data indicated that the carbonyl intensity index decreased with exposure time for both samples, while the main degradation mechanism occurred through hydrolysis reaction. This led to chain scissions resulting in a decrease in molar mass. Water absorption increased with exposure time for both neat PHBV and PHBV/C30B (3wt%) bionanocomposite. Differential scanning calorimetry measurements showed a decrease in both crystallinity index and melting temperature after hygrothermal aging and thermogravimetric analysis data indicated also a decrease in thermal stability. Mechanical and viscoelastic properties were also altered, being, however, more pronounced for the neat PHBV. Overall, the PHBV bionanocomposite exhibited a better resistance toward hygrothermal aging at 65 C and 100% RH.

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Effect of water absorption on the mechanical properties of poly(3-hydroxybutyrate)/vegetable fiber composites

Cited by 5 publications

References 2 publications

Water Sorption of Vegetable Fiber Reinforced Polymer Composites

Water Sorption of Vegetable Fiber Reinforced Polymer Composites

Environmentally benign alginate extraction and fibres spinning from different European Brown algae species

Effects of hygrothermal aging on chemical, physical, and mechanical properties of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate)/Cloisite 30B bionanocomposite

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