Biodegradation and performance of poly(ɛ‐caprolactone)/macaíba biocomposites

Siqueira, Danilo Diniz; Luna, Carlos Bruno Barreto; Araújo, Edcleide Maria; Costa, Thércio Henrique de Carvalho; Wellen, Renate Maria Ramos

doi:10.1002/pc.26429

Cited by 5 publications

(3 citation statements)

References 53 publications

(57 reference statements)

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“…[22][23][24] In view of this, it becomes of great relevance to explore various natural fibers, since they can play the role of fillers or reinforcement in the polymer matrix. [25][26][27] Recently [28][29][30] the macaíba fruit has been treated to obtain natural fiber and, as a consequence, the macaíba shell (MS) is a residue that can be reused as a natural filler. Regarding the reuse of MS, no mention was found in the literature for the production of biocomposites, setting up a justification to evaluate the potential of this natural filler.…”

Section: Introductionmentioning

confidence: 99%

Biopolyethylene/macaíba shell (Acrocomia intumescens) composites compatibilized with PE‐g‐MA and PE‐g‐AA: Influence of macaíba oil on processing

et al. 2022

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The present investigation aimed to produce ecological composites of biopolyethylene (BioPE) with macaíba shell (MS), using polyethylene‐graft‐maleic anhydride (PE‐g‐MA) and polyethylene‐graft‐acrylic acid (PE‐g‐AA) as compatibilizers, as well as macaíba almond oil as a plasticizing agent. The composites were processed in a co‐rotational twin‐screw extruder and injection molded. The addition of 30% by weight of MS in the BioPE matrix caused a reduction in impact strength and elongation at break, but improved stiffness and heat deflection temperature. The PE‐g‐MA and PE‐g‐AA compatibilizers improved the impact strength of the composites, suggesting increased interactions between the phases. There was an increase in the composites degree of crystallinity, indicating that the MS acted as a nucleating agent. The macaíba oil addition to the composites increased the impact strength, indicating a plasticizing effect. However, the elastic modulus, tensile strength, and degree of crystallinity tended to decrease. In general, the use of PE‐g‐MA compatibilizer was more effective to improve the composites mechanical properties. The reuse of MS is feasible for the production of sustainable composites.

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Section: Introductionmentioning

confidence: 99%

Biopolyethylene/macaíba shell (Acrocomia intumescens) composites compatibilized with PE‐g‐MA and PE‐g‐AA: Influence of macaíba oil on processing

et al. 2022

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“…[14] Among the former, the plasma treatment on fibers stands out as a "green" approach because it does not use dangerous chemicals or additives. [15][16][17] The plasma effect consists of modifications of the surface of the fibers by activation, grafting, and etching phenomena. [18] Yu et al [19] developed polyamide 66 based composites, including basalt fibers neat or previously modified by plasma polymerization of 3-aminopropyltriethoxysilane (APTES).…”

Section: Introductionmentioning

confidence: 99%

Plasma treatment application to improve interfacial adhesion in polypropylene‐flax fabric composite laminates

et al. 2022

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Recently, due to environmental and sustainability issues, the scientific community has been attracted to renewable natural resources, even for the development of materials intended for structural applications. This work deals with the pre‐treatment of a flax fiber fabric by exploring the effects of the exposure time to nitrogen plasma on the ultimate performance of polypropylene matrix composite laminates potentially usable for the realization of internal parts in the naval sector. Flax fabrics were treated with three different exposure times (5, 10, and 15 min) with the aim to improve the adhesion between the hydrophilic fibers and the hydrophobic matrix. At first, transverse and longitudinal wicking tests were carried out on the treated fabrics in order to evaluate the improvement of the absorption constants after the formation of reactive groups on their surface. The results collected so far in terms of fabric water uptake, tensile, and flexural properties as well as morphological aspects (SEM analysis) and damage evolution (ESPI technique), have indicated that the optimal pre‐treatment time of the reinforcing fabrics is equal to 15 min. Compared to the laminate with untreated fabrics, the specimen with flax fibers treated for 15 min displays higher tensile properties with an increase of 6.8% and 22.31% in ultimate strength and modulus, respectively. More in general, the achievements of this research might be useful to extend the current range of applications of flax fibers even in industrial fields still dominated by conventional fibers.

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“…[5][6][7] The academic community and the industrial sectors have invested efforts to use natural fibers during development of hybrid materials, giving rise to the so-called ecocomposites or biocomposites. 8,9 Currently, ecological composites are being extensively investigated with polymers with lower environmental impact, such as poly (lactic acid) (PLA), polyhydroxybutyrate (PHB) and polycaprolactone (PCL), [10][11][12][13][14][15] aiming at sustainable development.…”

Section: Introductionmentioning

confidence: 99%

Jatobá wood flour: An alternative for the production of ecological and sustainable PCL biocomposites

Luna

Filho

Siqueira

et al. 2022

Journal of Composite Materials

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The industrial residue of Jatobá wood flour (JWF) was reused during production of biocomposites based on polycaprolactone (PCL), 50% by weight of JWF was added to PCL matrix. Initially, maleic anhydride-grafted polycaprolactone compatibilizer (PCL-g-MA) was synthesized and characterized using X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and degree of grafting. Afterwards, PCL/JWF and PCL/JWF/PCL-g-MA biocomposites were processed in an internal mixer and injection molded. From the gathered results, increase in torque and reduction in the melt flow index of PCL/JWF biocomposites were verified related to neat PCL. Upon addition of PCL-g-MA to PCL/JWF there was a lubricating effect with reduced torque and increased fluidity. PCL/JWF displayed increased elastic modulus, Shore D hardness, and heat deflection temperature (HDT) around 158.5%, 16% and 24.5%, respectively, related to PCL. Nevertheless, there was decline in tensile strength and impact strength, which were improved in PCL/JWF/PCL-g-MA, suggesting higher interaction among phases, providing greater stress transfer. An interesting finding was the nucleating effect of JWF in PCL matrix, as the increased degree of crystallinity and accelerated crystallization. Morphology of PCL/JWF evidenced several voids, but upon compatibilization with PCL-g-MA, the interfacial adhesion and wetness increased, improving the mechanical properties. JWF reusing presents great potential to produce sustainable biocomposites, reducing the final product costs.

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Biodegradation and performance of poly(ɛ‐caprolactone)/macaíba biocomposites

Cited by 5 publications

References 53 publications

Biopolyethylene/macaíba shell (Acrocomia intumescens) composites compatibilized with PE‐g‐MA and PE‐g‐AA: Influence of macaíba oil on processing

Biopolyethylene/macaíba shell (Acrocomia intumescens) composites compatibilized with PE‐g‐MA and PE‐g‐AA: Influence of macaíba oil on processing

Plasma treatment application to improve interfacial adhesion in polypropylene‐flax fabric composite laminates

Jatobá wood flour: An alternative for the production of ecological and sustainable PCL biocomposites

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