Biodegradable PBAT-Based Nanocomposites Reinforced with Functionalized Cellulose Nanocrystals from Pseudobombax munguba: Rheological, Thermal, Mechanical and Biodegradability Properties

Pinheiro, Ivanei Ferreira; Ferreira, Filipe V.; Alves, Guilherme Fioravanti; Rodolfo, Antonio; Morales, Ana Rita; Mei, Lucia H. I.

doi:10.1007/s10924-019-01389-z

Cited by 57 publications

(28 citation statements)

References 66 publications

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“…Scaffaro et al (2018) [ 37 ] and Ferreira et al (2019) [ 38 ] showed that a part of external stresses can be absorbed by the fillers, while some are dissipated by particle-particle and particle-polymer interactions. They also studied a correlation between amount of filler, dispersion and improved mechanical properties of composites [ 39 , 40 ]. Similar to the previous findings, the flexural strength of the PLA decreased with increasing dosage of BC filler, but at the same time, the material became stiffer with E increasing.…”

Section: Resultsmentioning

confidence: 99%

Development of Biodegradable Flame-Retardant Bamboo Charcoal Composites, Part I: Thermal and Elemental Analyses

et al. 2020

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In this study, bamboo charcoal (BC) was used as a substitute filler for bamboo powder (BP) in a lignocellulose-plastic composite made from polylactic acid (PLA), with aluminum hypophosphite (AHP) added as a fire retardant. A set of BC/PLA/AHP composites were successfully prepared and tested for flame-retardancy properties. Objectives were to (a) assess compatibility and dispersibility of BC and AHP fillers in PLA matrix, and (b) improve flame-retardant properties of PLA composite. BC reduced flexural properties while co-addition of AHP enhanced bonding between PLA and BC, improving strength and ductility properties. Adding AHP drastically reduced the heat release rate and total heat release of the composites by 72.2% compared with pure PLA. The formation of carbonized surface layers in the BC/PLA/AHP composites effectively improved the fire performance index (FPI) and reduced the fire growth index (FGI). Flame-retardant performance was significantly improved with limiting oxygen index (LOI) of BC/PLA/AHP composite increased to 31 vol%, providing a V-0 rating in UL-94 vertical flame test. Adding AHP promoted earlier initial thermal degradation of the surface of BC/PLA/AHP composites with a carbon residue rate up to 40.3%, providing a protective layer of char. Further raw material and char residue analysis are presented in Part II of this series.

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Section: Resultsmentioning

confidence: 99%

Development of Biodegradable Flame-Retardant Bamboo Charcoal Composites, Part I: Thermal and Elemental Analyses

et al. 2020

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“…Several authors have reported improvement in thermal and mechanical properties after the addition of natural fibers, NFC and CNC, into polymer matrix [88,129]. Ferreira et al [24] prepared PBAT-based composites using three different natural fibers (Croton lanjouwensis, Malvastrum tomentosum, and Trema micrantha) from the Amazon forest via the melt mixing method.…”

Section: Processing Of Nanocomposites Reinforced With Natural Fillersmentioning

confidence: 99%

Polymer Composites Reinforced with Natural Fibers and Nanocellulose in the Automotive Industry: A Short Review

Ferreira

Pinheiro

Souza³

et al. 2019

J. Compos. Sci.

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165

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Environmental concerns and cost reduction have encouraged the use of natural fillers as reinforcement in polymer composites. Currently, a wide variety of reinforcement, such as natural fibers and nanocellulose, are used for this purpose. Composite materials with natural fillers have not only met the environmental appeal, but also contribute to developing low-density materials with improved properties. The production of natural fillers is unlimited around the world, and many species are still to be discovered. Their processing is considered beneficial since the natural fillers do not cause corrosion or great wear of the equipment. For these reasons, polymer reinforced with natural fillers has been considered a good alternative for obtaining ecofriendly materials for several applications, including the automotive industry. This review explores the use of natural fillers (natural fibers, cellulose nanocrystals, and nanofibrillated cellulose) as reinforcement in polymer composites for the automotive industry.

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“…AFM-IR spectroscopy was used to chemically analyze the molecules of the functional groups presented in each polymer. IR source was tuned to a wavelength at 1,728 cm −1 (CO absorption [30] ) and the thermal expansion of the absorbing region of the sample in response to infrared excitation was detected. The blue region indicates low infrared absorptivity, while yellow indicates areas of greater absorptivity.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and analysis of phase segregation of polystyrene‐block‐poly(methyl methacrylate) copolymer obtained by Steglich esterification from semitelechelic blocks of polystyrene and poly(methyl methacrylate)

Boni

Ferreira

Pinheiro

et al. 2020

J of Applied Polymer Sci

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Here, an alternative route to successfully synthesize polystyrene‐block‐poly(methyl methacrylate) (PS‐b‐PMMA) is reported. Steglich esterification was used as an effective, metal free approach for coupling carboxylic terminated PS and the hydroxyl end‐functionalized PMMA chains obtained by nitroxide‐mediated polymerization and atom transfer radical polymerization, respectively. α‐Functionalization was obtained using 4,4′‐azobis(4‐cyanovaleric acid) and 2,2,2‐tribromoethanol as initiators. The synthesis of PS‐b‐PMMA was confirmed by gel permeation chromatography and nuclear magnetic resonance (NMR), while the dependence of the diffusion coefficients of the polymers (PS, PMMA, PS/PMMA blend, and PS‐b‐PMMA) with their corresponding molecular weights was discussed based on the results of atomic force microscopy‐based infrared spectroscopy, differential scanning calorimetry, and spectra of diffusion‐ordered NMR spectroscopy. Differently from PS‐b‐PMMA, a partial segregation was observed for the PS/PMMA blend, affecting its thermal behavior and diffusion coefficient. The study here presented provides an easier and efficient strategy for the synthesis of PS‐b‐PMMA and new insights into the diffusion of polymers.

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Biodegradable PBAT-Based Nanocomposites Reinforced with Functionalized Cellulose Nanocrystals from Pseudobombax munguba: Rheological, Thermal, Mechanical and Biodegradability Properties

Cited by 57 publications

References 66 publications

Development of Biodegradable Flame-Retardant Bamboo Charcoal Composites, Part I: Thermal and Elemental Analyses

Development of Biodegradable Flame-Retardant Bamboo Charcoal Composites, Part I: Thermal and Elemental Analyses

Polymer Composites Reinforced with Natural Fibers and Nanocellulose in the Automotive Industry: A Short Review

Synthesis and analysis of phase segregation of polystyrene‐block‐poly(methyl methacrylate) copolymer obtained by Steglich esterification from semitelechelic blocks of polystyrene and poly(methyl methacrylate)

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