Application of X-ray diffraction to assess the microfibril angle of green and dry Eucalyptus grandis wood

Souza, Naiara Conceição Marques de; Lima, José Tarcísio; Soares, Bruno Charles Dias

doi:10.1007/s00468-021-02194-9

Cited by 2 publications

(4 citation statements)

References 19 publications

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“…Cellulose microfibril angle (MFA) in the fibrovascular bundles, deviation in their orientation from the fiber axis, highly affects the biomechanical properties of fibers and stalks. Thus, an estimated MFA of the IN1 rinds, based on the protocols of de Souza et al [80], was investigated to evaluate their orientation, which plays the most important role in their mechanical properties. The X-ray diffraction pattern of an intact rind sample is shown in Figure 6a (and Supplementary Figure S2).…”

Section: Crystallinity and Mfa Analysismentioning

confidence: 99%

“…Then, the reflection profiles were separated, and the T value was determined from second derivatives of (200) profiles (Figure 6a). The description of the method is given by de Souza et al [80] and Rekha [129]. The frequency of lignin β-ether bonds in the IN1 stalk rind was determined using the DFRC method according to the protocol of Lu and Ralph [132] with slight modification.…”

Section: Microfibril Angle By Xrdmentioning

confidence: 99%

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Lodging Variability in Sorghum Stalks Is Dependent on the Biomechanical and Chemical Composition of the Stalk Rinds

Mengistie,

Bokros,

DeBolt

et al. 2024

Crops

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Stalk lodging contributes to significant crop yield losses. Therefore, understanding the biomechanical strength and structural rigidity of grain stalks can contribute to improving stalk lodging resistance in crops. From the structural constituents of the stalk, the rind provides the principal structure, supporting cells against tension and bending loads. In this work, the biomechanical and viscoelastic behavior of the rind from the internodes of two sweet sorghum varieties (Della and REDforGREEN (RG)), grown in two different growing seasons, were evaluated by three-point micro-bending tests using a dynamic mechanical analyzer (DMA). In addition, the chemical composition of rinds and the microfibril angle (MFA) of the cell wall were determined using XRD. The results revealed that the biomechanical behavior of Della varieties was stiffer and more resistant to loads than that of RG varieties. Two features of the rind biomechanical properties, flexural modulus (FM) and flexural strength (FS), showed a significant reduction for RG. Particularly, a reduction in FS of 16–37% and in FM of 22–41% were detected for RG1. Changes in the stalks’ rind biomechanical properties were attributed to cell wall components. Total lignin and glucan/cellulose contents were positively correlated with the FM and FS of the rind. Subsequently, an increase in the two cell wall components drove an increase in stiffness. Furthermore, the MFA of the rind was also found to influence the rind strength.

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Section: Crystallinity and Mfa Analysismentioning

confidence: 99%

Section: Microfibril Angle By Xrdmentioning

confidence: 99%

Lodging Variability in Sorghum Stalks Is Dependent on the Biomechanical and Chemical Composition of the Stalk Rinds

Mengistie,

Bokros,

DeBolt

et al. 2024

Crops

View full text Add to dashboard Cite

show abstract

“…Microfibrillar angle (MFA) refers to the angle that the cellulose microfibrils in the majority of plant fibers make with the cell axis . MFA is considered to be an essential element in determining the mechanical characteristics of fibers, particularly their elasticity and rigidness . Due to their lightweight, natural fibers have excellent specific characteristics in addition to being environmentally benign .…”

Section: Introductionmentioning

confidence: 99%

“… 36 MFA is considered to be an essential element in determining the mechanical characteristics of fibers, particularly their elasticity and rigidness. 37 Due to their lightweight, natural fibers have excellent specific characteristics in addition to being environmentally benign. 38 One of the sources of natural fibers is the date palm tree that could be a potential source of cellulose that can be extracted from palm leaves’ waste.…”

Section: Introductionmentioning

confidence: 99%

Effect of Leaf Powdering Technique on the Characteristics of Date Palm-Derived Cellulose

Al-Awa,

Sangor,

Babili

et al. 2023

ACS Omega

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The date palm tree (Phoenix dactylifera L.) is the oldest cultivated tree and is very commonly seen in the Arab countries. In recent times, researchers are working on the conversion of the plant-based biowaste into value-added products.Cellulose is identified as one of the best options to be synthesized from plant-based materials due to its immense application possibilities. It is a natural hydrophilic polymer consisting of linear chains of 1,4-β-D-anhydroglucose units, and the most used method for cellulose extraction is acidic hydrolysis. However, in this study, a very sustainable, ecofriendly, and simple process of isolating cellulose from date palm leaves is discussed. In this study, the best mechanical approach (ball milling, grinding, or its combination) for changing the leaves into powder form, as well as the sustainable and simple chemical extraction of cellulose from those date palm leaves, is analyzed. SEM analyses confirmed that the mechanical treatment process affected the appearance of the cellulose formed. Raman spectrum confirmed the difference in stretching vibrations among the cellulose obtained. From the results obtained, it was noted that cellulose derived utilizing the grinding technique and subsequent chemical treatment was considered as the finest cellulose prepared with respect to its properties and structure, and the greatest yield obtained for Cellulose 2 was 42%. As a future scope, this cellulose developed can be used to produce advanced materials like nanocellulose.

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Application of X-ray diffraction to assess the microfibril angle of green and dry Eucalyptus grandis wood

Cited by 2 publications

References 19 publications

Lodging Variability in Sorghum Stalks Is Dependent on the Biomechanical and Chemical Composition of the Stalk Rinds

Lodging Variability in Sorghum Stalks Is Dependent on the Biomechanical and Chemical Composition of the Stalk Rinds

Effect of Leaf Powdering Technique on the Characteristics of Date Palm-Derived Cellulose

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