Sementes de açaí (Euterpe precatoria Mart.) como uma nova fonte alternativa de celulose: Extração e caracterização

Barros, Silma de S.; Oliveira, Erick da Silva; Pessoa, Wanison A.G.; Rosas, Alexandra Lizandra Gomes; Freitas, Ana Emília Margarido de; Lira, Márcia Santos de F.; Calderaro, Fábio Leandro; Saron, Clodoaldo; Freitas, Flávio A. de

doi:10.33448/rsd-v10i7.16661

Cited by 8 publications

(3 citation statements)

References 63 publications

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“…The pristine material (yellow passion fruit peel), as well as PFPA, were also characterized by Fourier‐transform infrared spectroscopy with attenuated total reflectance – FTIR‐ATR (Fig. 3), where we mainly observed bands related to lignocellulosic materials, i.e., cellulose (3323, 1636, 1318, 1110, and 890 cm −1 ), lignin (1268 and 1603 cm −1 ), and hemicellulose (1630 cm −1 ) in the peel 75,76 . On the other hand, in the ash, bands related to potassium and calcium carbonate are mainly observed (1378, 1460, 2866, 2954, 878, 704 cm −1 ), 63,77 and the spectrum was quite similar to the one obtained from the banana peel ash 77 …”

Section: Resultsmentioning

confidence: 99%

Eco‐friendly biodiesel production using passion fruit peels and cupuaçu seeds: Catalyst development and process optimization

Barros,

Nobre,

Lobo

et al. 2023

Biofuels Bioprod Bioref

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Yellow passion fruit peel and cupuaçu seeds are common wastes. Usually, they have few or no applications and are discarded, causing environmental pollution. To use them in a new way and reduce ecological pollution, we obtained the ash of yellow passion fruit peels by calcination. We characterized it using Fourier‐transform infrared spectroscopy with attenuated total reflectance (FTIR‐ATR), X‐ray fluorescence (XRF), X‐ray diffractometry (XRD), adsorption‐desorption of N2, scanning electron microscopy (SEM), basicity, and soluble alkalinity. It was observed that the ash was mainly composed of potassium (69%) in the form of carbonate, chloride, and sulfate, with a good surface area (11.23 m2 g−1). The cupuaçu butter was also extracted from the cupuaçu seeds and characterized, showing low acidity, peroxide, saponification, and iodine indexes, in addition to presenting a lipid profile with 57% saturated fatty acid and 43% unsaturated fatty acid. Oleic and stearic acids were present in higher proportions. These results demonstrate that this butter can be a sustainable input in biodiesel production. Thus, the ash was used as a heterogeneous catalyst in the butter transesterification. The biodiesel synthesis was optimized, resulting in 97.8% butter conversion into biodiesel under the following conditions: reaction time of 2 h, 5 wt% of catalyst, 80 °C, and a methanol‐to‐oil molar ratio of 30. This work, therefore, shows that it is possible to obtain and utilize bioinputs, such as cupuaçu butter and passion fruit peel ash, to produce biodiesel through transesterification, and the use of waste materials (precisely passion fruit peels and cupuaçu seeds) makes this method a cost‐effective and environmentally friendly approach to biofuel production.

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Section: Resultsmentioning

confidence: 99%

Eco‐friendly biodiesel production using passion fruit peels and cupuaçu seeds: Catalyst development and process optimization

Barros,

Nobre,

Lobo

et al. 2023

Biofuels Bioprod Bioref

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“…The moisture-related mass loss in the fibers was similar to the moisture content calculated in the muffle (Table 1). Initial degradation (Tonset) of the fiber occurred at approximately 237 °C, which refers to the loss of hemicellulose (Barros et al 2021a). Through The DTG (Fig.…”

Section: Tgamentioning

confidence: 99%

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

Freitas

Padilha²,

Barros

et al. 2023

Cellulose

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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.

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“…It is also observed that the cellulose content in the pine nut husks is much higher than that found in other agro-industrial residues such as soybean husks, banana pseudostem, passion fruit peels and açaí. Barros et al, 2021 Source: Authors.…”

Section: Lignocellulosic Materials Contentmentioning

confidence: 99%

Value aggregation of pine (Araucaria angustifolia) nuts agro-industrial waste by cellulose extraction

Barros

Pessoa

Júnior

et al. 2021

RSD

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Araucaria (Araucaria angustifolia) is a tree species found in the Southeast and South of Brazil. It is also known as Brazilian pine, presenting fruits of high acceptance. However, its processing generates by-products that are little used. Thus, this work aimed to extract and characterize the cellulose obtained from the pinion husk, as well as to evaluate the contents of ash, lignin, cellulose and α-cellulose in its composition. The raw material and the extracted cellulose were characterized by X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). As for the contents of chemical composition detected, the husks showed 1.6% ash, 7% extractives, 34% lignin and 55% cellulose, being 46% α-cellulose and 9% hemicellulose. It was observed by XRD that the removal of amorphous materials resulted in a gain of crystallinity (from 19 to 33%). Proving the efficiency of the extraction, the characterization of the cellulose obtained was shown to be of high purity, since the main band of the lignin (FTIR) and the amorphous materials of the cellulosic sample (TGA) disappeared. Finally, this work shows that the pinion bark is a rich source of cellulose, making it possible to obtain nanocrystals.

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Sementes de açaí (Euterpe precatoria Mart.) como uma nova fonte alternativa de celulose: Extração e caracterização

Cited by 8 publications

References 63 publications

Eco‐friendly biodiesel production using passion fruit peels and cupuaçu seeds: Catalyst development and process optimization

Eco‐friendly biodiesel production using passion fruit peels and cupuaçu seeds: Catalyst development and process optimization

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

Value aggregation of pine (Araucaria angustifolia) nuts agro-industrial waste by cellulose extraction

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