Evaluation of different methods for extraction of nanocellulose from yerba mate residues

Júnior, Marcos Aurélio Dahlem; Borsoi, Cleide; Hansen, Betina; Catto, André Luís

doi:10.1016/j.carbpol.2019.04.064

Cited by 58 publications

(19 citation statements)

References 47 publications

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“…The average size of the nanocellulose examined by TEM was about six or nine times smaller than that measured by DLS. Similar results were observed while extracting and characterizing nanocellulose from yerba mate sticks and wood pulp [33,34]. This discrepancy could be attributed to the dehydration of the nanocellulose during the sample preparation for TEM [35].…”

Section: Atomic Force Microscopy (Afm) Testsupporting

confidence: 68%

Effects of Cellulose Nanocrystals and Cellulose Nanofibers on the Structure and Properties of Polyhydroxybutyrate Nanocomposites

et al. 2019

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One of the major obstacles for polyhydroxybutyrate (PHB), a biodegradable and biocompatible polymer, in commercial applications is its poor elongation at break (~3%). In this study, the effects of nanocellulose contents and their types, including cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) on the crystallization, thermal, and mechanical properties of PHB composites were systematically compared. We explored the toughening mechanisms of PHB by adding CNCs and cellulose CNFs. The results showed that when the morphology of bagasse nanocellulose was rod-like and its content was 1 wt %, the toughening modification of PHB was the best. Compared with pure PHB, the elongation at break and Young’s modulus increased by 91.2% and 18.4%, respectively. Cellulose nanocrystals worked as heterogeneous nucleating agents in PHB and hence reduced its crystallinity and consequently improved the toughness of PHB. This simple approach could potentially be explored as a strategy to extend the possible applications of this biopolymer in packaging fields.

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Section: Atomic Force Microscopy (Afm) Testsupporting

confidence: 68%

Effects of Cellulose Nanocrystals and Cellulose Nanofibers on the Structure and Properties of Polyhydroxybutyrate Nanocomposites

et al. 2019

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“…This drink evolved from a tea consumed by the Guarani indigenous ethnic group and the commercial potential of this plant was discovered by the Jesuits, who made the native plant cultivation. The consumption of this drink has a social and, even today, this tradition is maintained along with generations 1–3 …”

Section: Introductionmentioning

confidence: 99%

Thermal and dynamic mechanical behavior of epoxy composites reinforced with post‐consumed yerba mate

Neves

Vanzetto

Lazzari

et al. 2021

J of Applied Polymer Sci

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Yerba mate (YM) is widely consumed in Latin American countries, and its residues can be used as bio‐resources such as reinforced in epoxy composites. The present work aims to produce epoxy resin composites and evaluate the influence of post‐consumed YM as reinforcement. The concentrations of YM used were 5, 10, and 20% (wt/wt). Chemical, thermal, morphological, and dynamic mechanical behaviors were explored. The YM incorporation did not influence chemically on the epoxy structure and a pull‐out phenomenon was observed as YM content increased. The YM at lower concentrations (5 and 10%) led to higher values of activation energies calculated from model‐free isoconversional methods. On the other hand, the composite e/YM 20 wt% improved all dynamic‐mechanical properties. YM proved to be a suitable and cheap reinforcement for epoxy resin.

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“…It is generally consumed as infusion due to its good taste and well-known antioxidant properties [ 32 , 33 ]. Yerba mate is composed from about 35% α-cellulose [ 34 ], 25% hemicellulose [ 34 ] and 25–30% lignin [ 34 , 35 ]. The presence of lignin results in yerba mate containing different amounts of polyphenols (i.e., caffeic and chlorogenic acids) [ 33 ], xanthines (i.e., caffeine and theobromine), flavonoids (i.e., catechin, quercetin, kaempferol and rutin) [ 36 , 37 ], amino acids, saponin and tannins as well as some vitamins (i.e., C, B 1 , and B 2 ) [ 36 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (Ilex paraguariensis) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)

et al. 2020

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In this work, yerba mate nanoparticles (YMNs) were extracted from Ilex paraguairiencis yerba mate wastes and further used to improve the overall performance of mechanically recycled PLA (PLAR). Recycled PLA was obtained by melt reprocessing PLA subjected to an accelerated ageing process, which involved photochemical, thermal and hydrothermal ageing steps, as well as a final demanding washing step. YMNs (1 and 3 wt. %) were added to the PLAR during the melt reprocessing step and further processed into films. The main goal of the development of PLAR-YMNs bionanocomposites was to increase the barrier properties of recycled PLA, while showing good overall performance for food packaging applications. Thus, optical, structural, thermal, mechanical and barrier properties were evaluated. The incorporation of YMNs led to transparent greenish PLAR-based films with an effective blockage of harmful UV radiation. From the backbone FTIR stretching region (bands at 955 and 920 cm−1), it seems that YMNs favor the formation of crystalline domains acting as nucleating agents for PLAR. The morphological investigations revealed the good dispersion of YMNs in PLAR when they are used in the lowest amount of 1 wt. %, leading to bionanocomposites with improved mechanical performance. Although the addition of high hydrophilic YMNs increased the water vapor transmission, the addition of 1 wt. % of YMNs enhanced the oxygen barrier performance of the produced bionanocomposite films. These results show that the synergistic revalorization of post-consumer PLA and nanoparticles obtained from agri-food waste is a potential way for the production of promising packaging materials that meet with the principles of the circular economy.

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Evaluation of different methods for extraction of nanocellulose from yerba mate residues

Cited by 58 publications

References 47 publications

Effects of Cellulose Nanocrystals and Cellulose Nanofibers on the Structure and Properties of Polyhydroxybutyrate Nanocomposites

Effects of Cellulose Nanocrystals and Cellulose Nanofibers on the Structure and Properties of Polyhydroxybutyrate Nanocomposites

Thermal and dynamic mechanical behavior of epoxy composites reinforced with post‐consumed yerba mate

Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (Ilex paraguariensis) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)

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