Main Characteristics of Underexploited Amazonian Palm Fibers for Using as Potential Reinforcing Materials

Fonseca, A. S.; Raabe, Joabel; Dias, Lílian Mara Kirsch; Baliza, Ana Elisa Rodarte; Costa, Tattiane Gomes; Silva, Luiz Eduardo; Vasconcelos, Raimundo Pereira de; Marconcini, J. M.; Savastano, Holmer; Mendes, Lourival Marin; Yu, Aimin; Orts, William J.; Tonoli, Gustavo Henrique Denzin

doi:10.1007/s12649-018-0295-9

Cited by 15 publications

(4 citation statements)

References 123 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The values of crystalline fraction is 43% , crystallite size 3.2nm, and the number of cellulose chains per crystallite of the macauba endocarp, respectively. According to Fonseca et al (2019), the mechanical reinforcing effectiveness of lignocellulosic materials is related to the nature of cellulose and its crystallinity. The C F (43%) calculated by curves deconvolution shows that macauba endocarp composition is associated most to amorphous material such as lignin, hemicellulose and extractives that do not contribute to the crystalline fraction of biomass (Fonseca et al, 2019).…”

Section: Xrd Of Macaubaendocarpmentioning

confidence: 99%

“…According to Fonseca et al (2019), the mechanical reinforcing effectiveness of lignocellulosic materials is related to the nature of cellulose and its crystallinity. The C F (43%) calculated by curves deconvolution shows that macauba endocarp composition is associated most to amorphous material such as lignin, hemicellulose and extractives that do not contribute to the crystalline fraction of biomass (Fonseca et al, 2019). Furthermore, this C F value is similar to those found previously by (Lacerda et al, 2016).…”

Section: Xrd Of Macaubaendocarpmentioning

confidence: 99%

See 1 more Smart Citation

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Menali,

Zidanes,

Dias

et al. 2024

CERNE

View full text Add to dashboard Cite

Background:The macauba (Acrocomia aculeata (Jacq.) Lodd. ex Mart.) is a palm tree native to tropical regions and occurs in much of the Brazilian territory. Current studies are focused on the extraction and exploitation of vegetable oil from this fruit. However, there are few studies on the residue, the endocarp, which represents approximately 25% of the total mass of the fruit. Studies that search for solutions for using residue, thus adding value, and generating environmentally friendly products, are of fundamental importance. Thus, this research aimed to evaluate the physical and mechanical properties of reconstituted wood panels produced with different proportions of macauba endocarp particles to replace pine wood particles, in addition to characterize the physical and chemical properties of macauba endocarp. The chemical characterization tests were performed according to applicable standards. The basic density was determined according to the NBR 11941 standard. Thermogravimetric analysis (TGA), X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR) were also performed. The particleboards panels were produced with a nominal density of 0.70g/cm³ and dimensions of 25x25x1.5cm. Five different treatments were evaluated with variations in the proportion of macauba endocarp particles in the core of the panel. For particle agglutination, phenol-formaldehyde adhesive was used at a proportion of 9% for the core and 12% for the faces, based on the dry mass of each panel. Scanning electron microscopy (SEM) was used to analyze the panel surfaces.Results:The endocarp of Acrocomia aculeata has low extractive content, high lignin content and high densification, 1.23g/cm³, when compared to Pinus oocarpa wood, 0.43g/cm³. All panels were classified as low density according to CS 236-66 and had an average apparent density between treatments of 0.586g/cm³. A greater dimensional stability and a decrease in the static bending properties of the panels was observed as the proportion of macauba endocarp particles increased. The internal bonding of the panels showed a positive result with the increase in the use of particles of the residue. Conclusion:The panels produced have potential for use for non-structural purposes.

show abstract

Section: Xrd Of Macaubaendocarpmentioning

confidence: 99%

Section: Xrd Of Macaubaendocarpmentioning

confidence: 99%

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Menali,

Zidanes,

Dias

et al. 2024

CERNE

View full text Add to dashboard Cite

show abstract

“…When comparing the cellulose content (Table 6), it is possible to observe that the curauá fiber produced in this study presented a higher content than the other works with curauá fiber found in the literature. The high cellulose content has a direct influence on the physical and mechanical properties of the fibers (Fonseca et al 2019) and acts as a reinforcing agent. The constituents hemicellulose and lignin act as a matrix phase (Latif et al 2019).…”

Section: Cellulosementioning

confidence: 99%

Curauá fiber from plants produced by tissue culture: thermal, mechanical, and morphological characterizations

Freitas

Padilha²,

Barros

et al. 2023

Cellulose

View full text Add to dashboard Cite

Curauá fibers are already well known, mainly for their good mechanical properties and synergism with polymeric matrices. Thus, in this work, we produced the curauá plant by tissue culture (micropropagation technique) and extracted the fibers, which were characterized regarding moisture, ash, extractives, lignin, hemicellulose, holocellulose, and cellulose contents, besides infrared spectroscopy (FTIR-ATR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and evaluation of mechanical properties. Compared to other works, this curauá fiber presented a higher content of cellulose (77.2%) and lower hemicellulose content (6.8%).Another unique feature was the high crystallinity of the cellulose present in the fiber (73.53%), which reflected good thermal and mechanical properties. Thus, we show that the micropropagation technique is highly advantageous for the scale production of this fiber, in addition to producing a high-quality fiber for application in composites since it can better control the plant growth environment as well as macro and micronutrients.

show abstract

“…After the fitting process, all measurements for crystallite size and number of cellulose chains were carried out on the theoretical curves. The CIF (Crystallographic Information File) were obtained from complementary data (French, 2014) and edited for each different fiber on CIF files to fit the theoretical curve into the experimental one, as reported elsewhere (Fonseca et al, 2019;French 2014). All intensities were normalized to…”

Section: X-ray Diffraction (Xrd) and True Density Of The Fibersmentioning

confidence: 99%

Changes on structural characteristics of cellulose pulp fiber incubated for different times in anaerobic digestate

Tonoli

Holtman

Silva

et al. 2021

CERNE

View full text Add to dashboard Cite

Background:The objective of the present work was to investigate the influence of a pre-treatment of microbial-rich digestate (liquid mesophilic anaerobic digestate -AD-supernatant) on the morphology, crystallinity, and thermal stability of cellulose pulp fiber. Results:The six most abundant bacteria in the AD-supernatant were determined by 16S analysis. The bacteria population was comprised mostly of Bacteroides graminisolvens (66%) and Parabacteroides chartae (28%). Enzymatic activity from the bacteria partially removed the amorphous components and increased the crystallinity and crystallite size of the cellulose substrate. The fiber pulp was incubated in AD-supernatant for 5, 10, and 20 days. The X-ray diffraction data provided evidence that the amorphous portion of the cellulose was more readily and quickly hydrolyzed than the crystalline portion. The longest incubation times (20 days) resulted in substantial deconstruction of the cellulose fiber structure and decreased the thermal degradation temperature. Conclusion:The anaerobic digestate is inexpensive and could be used to effectively aid in the pretreatment of cellulose on large scale transformation processes, e.g. for making biofuels, cellulose micro/ nanofiber production or engineered fiber-based materials.

show abstract

Main Characteristics of Underexploited Amazonian Palm Fibers for Using as Potential Reinforcing Materials

Cited by 15 publications

References 123 publications

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Curauá fiber from plants produced by tissue culture: thermal, mechanical, and morphological characterizations

Changes on structural characteristics of cellulose pulp fiber incubated for different times in anaerobic digestate

Contact Info

Product

Resources

About