Physicochemical, Mechanical and Morphologic Characterization of Purple Banana Fibers

Gonçalves, Ana Paula Bispo; Miranda, Cleidiene Souza de; Guimarães, Danilo Hansen; Oliveira, Jamerson Carneiro de; Cruz, Allan Moreira Faislon; Silva, Felipe Leonardo Brito Melo da; Luporini, Samuel; José, Nadia Mamede

doi:10.1590/1516-1439.366414

Cited by 28 publications

(11 citation statements)

References 12 publications

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“…To study the effectiveness of chemical treatment in piassaba fibers, XRD analysis was performed whose result is shown in the diffractogramin Figure 6.The figure shows that piassava fiber (untreated and treated) there are three broad diffraction peaks at 2 θ, the most intense being the 22° corresponding to the crystalline part of the fiber, and halos at 16° and 35º referring to the amorphous part of the fiber, such as the hemicellulose and lignin present in the fibers microfibrils.The result obtained is very similar to those of other lignocellulosic fibers, and reflects the crystalline lattice of cellulose I [24][25][26][27][28] . Table 2 The increase of crystallinity index in alkaline treated piassava fibers indicated that the chemical treatment induced the crystallinity and it increase due to the removal of amorphous materials like hemicellulose, lignin, and some other [23,[29][30][31] .…”

Section: Resultsmentioning

confidence: 99%

Effects of mercerization in the chemical and morphological properties of amazon piassava

et al. 2019

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The objective of this work was to investigate the effects of mercerization on chemical, morphological and thermal properties of Amazon Piassava Fibers. The effect of this treatment was studied using XRF, SEM, XRD and TGA. The fibers have been treated in 5% and 10% NaOH for 60 min. The XRF results for treated and untreated fibers showed that there is a decrease in the amount of SiO 2 by increasing the NaOH concentration. It has been possible to observe through SEM in untreated fiber that the surface presents a well arranged pattern of silicon rich star-like protrusions. For the two concentrations, SEM allowed to notice that the removal of deleterious surface impurities and fiber roughness was enhanced. The removal of organic material after treatment can be observed in the TGA analysis. XRD analysis indicate an increase in the crystallinity index, 0.19 to 0.31 after the treatment for 10% concentration solutions.

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Section: Resultsmentioning

confidence: 99%

Effects of mercerization in the chemical and morphological properties of amazon piassava

et al. 2019

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“…This relatively low rate could indicate a low porosity of the fiber and might contribute to good mechanical re-sistance [5]. This water absorption capacity also indicated the existence of free hydroxyl group, which attracts water molecules from the surrounding environment through hydrogen bonding [25]. These hydroxyl groups are responsible for the presence of hemicelluloses molecules in the fiber as shown in Figure 3.…”

Section: Water Absorptionmentioning

confidence: 99%

“…The first stage occurs from 68˚C up to 154˚C. It is characterised by a weight loss of 7.27% due to the dehydration of fiber [4] and evaporation of volatile substances such as alcohols, aldehydes, esters, organic acids, aliphatic hydrocarbons and the phenol groups present in the raw fiber [25]. Above 154˚C up to 230˚C a little loss in weight is observed.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…The exothermic peaks are observed around 320˚C and 340˚C for the first and around 400˚C and 410˚C for the second. These peaks might successively be assigned to thermal degradation and decomposition temperatures of cellulose and lignin present in CL fiber [25] [40]. The melting temperature of water presents in the fibre (T onset ) is read from the graph by matching the extrapolated beginning of the curve by the intersection point of the tangent with the point of maximum slope on the principal side of the peak with the base line extrapolated [40].…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

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Physico-Chemical and Thermal Characterization of a Lignocellulosic Fiber, Extracted from the Bast of <i>Cola lepidota</i> Stem

Legrand¹,

Meva’a²,

Ouagne³

et al. 2020

JMMCE

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In this research work, fiber extracted from the bark of Cola lepidota (CL) plant, grown in the flora of Southern part of Cameroon, was investigated for composites reinforcement. The investigation was carried via evaluation of water absorption capacity, moisture content, real density, porosity, chemical composition, chemical structure and thermal behaviour. It was discovered that the new fiber has relatively low moisture content and water absorption capacity similar to those of other investigated natural fibers such as flax, sisal, coconut, hemp and jute. Its porosity was found appropriate for composite production and the fiber was found to be thermally stable up to 230˚C, with maximum degradation temperature of 325˚C. The main constituents of the fibre include cellulose, hemicellulose and lignin. In conclusion, based on the properties investigated, this fiber is considered suitable for composite manufacture.

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“…This irregularity may be attributed to the presence of impurities, waxes, hemicelluloses and lignin on its surface. 44 The presence of pores is clearly visible on the surface of WS and AS. After treatment more uniform particles can be seen.…”

Section: Sem Characterizationmentioning

confidence: 97%

Characterization of microcrystalline cellulose extracted from walnut and apricots shells by alkaline treatment

Mahmoud

Safidine

Belhaneche‐Bensemra

2021

JSCS

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In this study, microcrystalline cellulose (MCC) was isolated from walnut and apricot shells (WS and AS) as agricultural wastes in order to use it as reinforcement in polymer composites. The microcrystalline cellulose was extracted by alkaline treatment and bleached by peroxide as an environmentally friendly treatment, called walnut cellulose (WC) and apricot cellulose (AC). The chemical composition of the samples was set according to the Technical Association of Pulp and Paper Industry (TAPP). After treatments, the alpha-cellulose content increased by about 23 % for the two used cellulose sources. The structural and morphological properties of the samples were investigated by Fourier transform infrared spectroscopy in the attenuated total reflectance mode (ATR-FTIR), optical microscopy (OM), X-ray diffraction and scanning electron microscopy (SEM). The crystallinity index values evaluated for WC and AC via X-ray diffraction were respectively 86.4 and 80.3 %. The alkaline soluble fractions of walnut (ASW) and apricot (ASA) shells were recovered and characterized by OM and ATR-FTIR spectroscopy. Furthermore, their chemical composition was analyzed. The characterization and the properties of the WC and AC were similar to those of commercial MCC and MCC prepared in literature from wood and some agricultural wastes.

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Physicochemical, Mechanical and Morphologic Characterization of Purple Banana Fibers

Cited by 28 publications

References 12 publications

Effects of mercerization in the chemical and morphological properties of amazon piassava

Effects of mercerization in the chemical and morphological properties of amazon piassava

Physico-Chemical and Thermal Characterization of a Lignocellulosic Fiber, Extracted from the Bast of <i>Cola lepidota</i> Stem

Characterization of microcrystalline cellulose extracted from walnut and apricots shells by alkaline treatment

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Physicochemical, Mechanical and Morphologic Characterization of Purple Banana Fibers

Cited by 28 publications

References 12 publications

Effects of mercerization in the chemical and morphological properties of amazon piassava

Effects of mercerization in the chemical and morphological properties of amazon piassava

Physico-Chemical and Thermal Characterization of a Lignocellulosic Fiber, Extracted from the Bast of &lt;i&gt;Cola lepidota&lt;/i&gt; Stem

Characterization of microcrystalline cellulose extracted from walnut and apricots shells by alkaline treatment

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Physico-Chemical and Thermal Characterization of a Lignocellulosic Fiber, Extracted from the Bast of <i>Cola lepidota</i> Stem