Tailored PCL/Macaíba fiber to reach sustainable biocomposites

Siqueira, Danilo Diniz; Luna, Carlos Bruno Barreto; Ferreira, Eduardo da Silva Barbosa; Araújo, Edcleide Maria; Wellen, Renate Maria Ramos

doi:10.1016/j.jmrt.2020.06.066

Cited by 32 publications

(21 citation statements)

References 73 publications

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“…When treating MS with MA, a spectrum with two signals was observed, one at 1732 cm −1 , which is associated with the vibration of the carbonyl groups (CO), and one at 1236 cm −1 , corresponding to the asymmetric groups of the COC connections in the BAD. A peak with high intensity at approximately 1034 cm −1 was also observed, referring to the amorphous regions of cellulose and lignin 28 …”

Section: Resultsmentioning

confidence: 86%

Approaches on PCL/macaíba biocomposites ‐ mechanical, thermal, morphological properties and crystallization kinetics

Siqueira

Luna

Araújo

et al. 2021

Polymers for Advanced Techs

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Biocomposites based on macaíba shell (MS) and Polycaprolactone (PCL) were melting processed in this work; seeking better compatibility between PCL, MS was chemically treated with maleic anhydride (MA) and sodium hydroxide (NaOH), in addition, PCL‐g‐MA was used as compatibilizer. The biocomposites' performance was evaluated through Fourier transform infrared (FTIR), thermogravimetry (TG), contact angle, water absorption, scanning electron microscopy (SEM), the tensile experiments were executed according to ASTM D638 and the nonisothermal crystallization kinetics was performed from differential scanning calorimetry (DSC) scans using Pseudo‐Avrami, Ozawa, and Mo models. Chemical treated and compatibilized biocomposites presented better tensile behavior with no significant changes in the thermal stability. Higher HDT was verified on PCL/MS biocompounds due to the MS hardening effect, whereas higher contact angle and water absorption were computed for PCL/MS most due to new ways origin for the water get in as provided by MS. Related to crystallization kinetics Ozawa as displayed in the Appendix S1 failed to fit PCL/MS kinetics whereas Pseudo‐Avrami and Momay be safely used form processing purposes. Summing up, PCL/MS biocomposites were carefully investigated and gathered information may be promptly used in sundry applications as well as be added to the literature database.

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Section: Resultsmentioning

confidence: 86%

Approaches on PCL/macaíba biocomposites ‐ mechanical, thermal, morphological properties and crystallization kinetics

Siqueira

Luna

Araújo

et al. 2021

Polymers for Advanced Techs

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“…Natural bers are commonly used in the production of polymeric composites, as they have advantages such as good availability, biodegradability, low cost, good thermal and mechanical properties, renewable, non-toxic and can be easily modi ed by chemical agents [9,10]. Currently, there is great academic and industrial interest in the preparation of composites reinforced with jute bers, sisal, cotton, macaíba, linen, palm ber, coconut ber, curauá and wood powder, using biodegradable polymers and green polymers [11][12][13]. These bers are widely used to reinforce polyethylene (PE) and polypropylene (PP), aiming at the manufacture of materials for applications in the automotive and aerospace industries [14,15].…”

Section: Introductionmentioning

confidence: 99%

From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil

et al. 2021

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This work aimed to investigate the biopolyethylene (BioPE)/wood powder (WP) composites compatibilized with polyethylene-grafted maleic anhydride (PE-g-MA), using macaíba oil (OM) as a processing aid. The composites were prepared, initially, in an internal mixer and, later, the crushed akes were molded by injection. Mechanical properties (impact, tensile, exural and Shore D hardness), heat de ection temperature (HDT), Vicat softening temperature, differential scanning calorimetry (DSC), thermogravimetry (TG), water absorption, torque rheometry and scanning electron microscopy (SEM) were evaluated. The addition of 30% wood powder to the BioPE matrix increased the elastic modulus (tensile and exural), Shore D hardness and heat de ection temperature (HDT), compared to neat BioPE. These properties were improved when 10% of the PE-g-MA compatibilizer was added, compared to neat BioPE and the non-compatibilized composite. There was a signi cant reduction in the torque of the composites with the addition of macaíba oil, indicating that it improved the processability. In addition, the incorporation of macaíba oil into the composites helped to reduce water absorption, as well as to increase impact strength. SEM micrographs illustrated a greater degree of interfacial adhesion when PEg-MA and macaiba oil were added.

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“…[7][8][9] The scientific community has been searching feasible solutions for the environmental regeneration, such as using biodegradable polymers due to the alternative of producing high performance products without deleterious effects to the ecosystem. [10][11][12] In this classification are the polyesters based on hydroxy-carbonic acids, especially poly (hydroxybutyrate) -PHB, poly (e-caprolactone)-PCL and poly (lactic acid)-PLA. [11][12][13][14] PCL is a synthetic aliphatic polymer, synthetized from petroleum, biodegradable, biocompatible and hydrophobic.…”

Section: Introductionmentioning

confidence: 99%

Effect of injection parameters on the thermal, mechanical and thermomechanical properties of polycaprolactone (PCL)

Luna

Siqueira

Ferreira

et al. 2021

Journal of Elastomers & Plastics

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In this work, an experimental design was applied in the injection molding process of polycaprolactone (PCL), aiming to evaluate the mechanical properties (impact strength, tensile strength and Shore D Hardness), thermal (differential scanning calorimetry (DSC)) and thermomechanical (heat deflection temperature (HDT)), in PCL injected specimens. A type 2n planning was applied, with n = 3 and central point, having the input factors: processing temperature profile, mold temperature and injection flow. The results showed that the DSC curves presented a complex mechanism during crystallization, suggesting that depending on the processing conditions a high degree of crystallinity can be obtained. When using a higher processing temperature and a higher injection flow, there is an increase in the mass of the PCL parts. The impact strength is more expressive when a higher injection flow and a lower processing temperature are applied, reaching values around 260 J/m. The mold temperature impairs the elongation at the break of the PCL, while the elastic modulus was governed by the degree of crystallinity. A deleterious effect on HDT was observed with increased injection flow, suggesting that this parameter negatively affects thermomechanical resistance. The use of experimental design in the processing of PCL is important, since it is possible to optimize properties with the ideal conditions of injection molding.

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Tailored PCL/Macaíba fiber to reach sustainable biocomposites

Cited by 32 publications

References 73 publications

Approaches on PCL/macaíba biocomposites ‐ mechanical, thermal, morphological properties and crystallization kinetics

Approaches on PCL/macaíba biocomposites ‐ mechanical, thermal, morphological properties and crystallization kinetics

From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil

Effect of injection parameters on the thermal, mechanical and thermomechanical properties of polycaprolactone (PCL)

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