The effect of xylan on the fibrillation efficiency of DED bleached soda bagasse pulp and on nanopaper characteristics

Ghasemian, A; Syverud, Kristin; Chinga-Carrasco, Gary

doi:10.1007/s10570-014-0504-z

Cited by 25 publications

(10 citation statements)

References 31 publications

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“…The rate of oxygen permeability (ROP) of F 1 -CNP was 1.07 × 10 –12 cm 3 ·cm·cm –2 ·s·cm·Hg, which increased to 1.36 × 10 –12 cm 3 ·cm·cm –2 ·s·cm·Hg for F 5 -CNP. This result was owing to the high hemicellulose content potentially improving cellulose defibrillation and then forming a dense structure . The rate of water vaper permeability (RWVP) of CNP was around 3 × 10 –3 g·day –1 ·m –1 ·kPa –1 , as listed in Table S6 (SI).…”

Section: Results and Discussionmentioning

confidence: 98%

“…Also, the tensile strength and toughness of F-CNP samples were higher than those of P-CNP samples, owing to the small amount (<5%) of residual lignin (Table ), which could enhance the mechanical properties of CNP . In addition, the remaining hemicellulose also could facilitate the release of nanofibrils during mechanical treatment of pulp fiber. , A high hemicellulose content could serve an inhibitor to prevent the coalescence of microfibrils, resulting in the easier fibrillation of cellulose fibers, which in turn leads to a higher tensile strength of the resulting CNP. Thus, the tensile strength of CNP samples descended with the increase of hydrolysis time (i.e., the decreased hemicellulose content).…”

Section: Results and Discussionmentioning

confidence: 99%

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Comparative Evaluation of the Efficient Conversion of Corn Husk Filament and Corn Husk Powder to Valuable Materials via a Sustainable and Clean Biorefinery Process

Liu³

et al. 2018

ACS Sustainable Chem. Eng.

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Corn husk is usually burned and discarded, resulting in environment pollution and a waste of resources. To make better use of corn husk, in this work, corn husk filament (CHF) and corn husk powder (CHP) were first separated and then the comparative evaluation of efficient conversion of CHF and CHP to valuable materials was carried out via a sustainable route [i.e., one-step formic acid (FA) hydrolysis]. After FA fractionation, over 90% hemicellulose could be removed (mainly converted to xylose), about 80% lignin with high purity could be isolated, and the fractionated cellulose solid residue was used to fabricate cellulose nanofibrils (CNFs) and functional cellulose nanopaper (CNP). Results showed that, compared to CHP, the CHF with lower density, longer fibers, and higher crystallinity could be easier to hydrolyze, and the resulting CNFs had a smaller diameter and higher crystallinity, leading the final CNP to have better mechanical properties. The maximum tensile strength and toughness of the resultant CNP reached up to 177.0 ± 6.1 MPa and 13.3 ± 1.7 MJ·m–3, respectively. Also, the CNP with high crystallinity and great thermal stability exhibited excellent water resistance and good barrier properties. Thus, the present work provides a sustainable and new route to make full use of corn husk through the production of xylose, high-purity lignin, and functional CNP.

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Section: Results and Discussionmentioning

confidence: 98%

Section: Results and Discussionmentioning

confidence: 99%

Comparative Evaluation of the Efficient Conversion of Corn Husk Filament and Corn Husk Powder to Valuable Materials via a Sustainable and Clean Biorefinery Process

Liu³

et al. 2018

ACS Sustainable Chem. Eng.

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“…This layer is composed of a network of randomly arranged cellulose microfibrils (semicrystalline) connected to an amorphous phase of hemicellulose and lignin, which act as a matrix for the cellulose bundles [ 36 ]. Cellulose microfibrils with a diameter of about 10 to 50 nm provide mechanical strength to the natural plant fibers [ 37 ]. In the inner secondary, three layers are generally present, and in each one, the cellulose wall microfibrils are arranged helically in relation to the long axis of the fiber.…”

Section: What Are Natural Fibers?mentioning

confidence: 99%

A Review of the Use of Natural Fibers in Cement Composites: Concepts, Applications and Brazilian History

Rocha¹,

Júnior²,

Marvila³

et al. 2022

Polymers

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The use of natural lignocellulosic fibers has become popular all over the world, as they are abundant, low-cost materials that favor a series of technological properties when used in cementitious composites. Due to its climate and geographic characteristics, Brazil has an abundant variety of natural fibers that have great potential for use in civil construction. The objective of this work is to present the main concepts about lignocellulosic fibers in cementitious composites, highlighting the innovation and advances in this topic in relation to countries such as Brazil, which has a worldwide prominence in the production of natural fibers. For this, some common characteristics of lignocellulosic fibers will be observed, such as their source, their proportion of natural polymers (biological structure of the fiber), their density and other mechanical characteristics. This information is compared with the mechanical characteristics of synthetic fibers to analyze the performance of composites reinforced with both types of fibers. Despite being inferior in tensile and flexural strength, composites made from vegetable fibers have an advantage in relation to their low density. The interface between the fiber and the composite matrix is what will define the final characteristics of the composite material. Due to this, different fibers (reinforcement materials) were analyzed in the literature in order to observe their characteristics in cementitious composites. Finally, the different surface treatments through which the fibers undergo will determine the fiber–matrix interface and the final characteristics of the cementitious composite.

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“…Even though it is true that no enzyme was tasked with the removal of ashes and lignin, the degradation of pectins and xylans may benefit from the release of other chemical constituents. The action of enzymes is mainly focused on the external zone of fibers, where the concentration of lignin, extractives, and ashes is high [67]. In these layers, cellulose, hemicellulose (xylans), lignin, pectins, and inorganic compounds form a resistant and functional complex, as illustrated Figure 4.…”

Section: Chemical Composition Of the Fibersmentioning

confidence: 99%

Valorization of Date Palm Waste for Plastic Reinforcement: Macro and Micromechanics of Flexural Strength

et al. 2021

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Date palm waste is an abundant agricultural residue in Tunisia and can be used for plastic reinforcement. Moreover, its use in plastic composites can help to reduce dependence on fossil resources for material production. In this work, the valorization of date palm residues was studied by employing high-yield processes following mechanical, chemical, and enzymatical treatments. Fibers obtained by soft chemical treatment with sodium hydroxide and enzymatic treatment with xylanases and pectinases were evaluated for their use in the reinforcement of plastic materials. The flexural strength property, truly relevant for structural, construction, automotive, or other market sectors, was adopted to assess the reinforcing potential of the fibers. Polypropylene was effectively reinforced with date palm fibers (60 wt.%), exhibiting a flexural strength increases of 80% (73.1 MPa), 93% (78.5 MPa), and 106% (83.9 MPa) for mechanical, chemical, and enzymatic fibers, respectively. The different treatments had an impact on the chemical composition of the fibers, and by extension on the final properties of the composites. The holocellulose content could provide good interfacial adhesion using a coupling agent, whereas the lignin content improved the dispersion of the phases. Two interesting outcomes were that the flexural performance of enzymatic fibers was like that of wood composites, whereas the specific flexural strength was comparable to that of glass fiber composites. Overall, the present work has shown the potential behind date palm waste in the composite sector when a specific property or application is desired. Novel treatments have been used for greater fiber compatibility, increasing the sustainability of the process, and improving the applicability of the palm residue.

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The effect of xylan on the fibrillation efficiency of DED bleached soda bagasse pulp and on nanopaper characteristics

Cited by 25 publications

References 31 publications

Comparative Evaluation of the Efficient Conversion of Corn Husk Filament and Corn Husk Powder to Valuable Materials via a Sustainable and Clean Biorefinery Process

Comparative Evaluation of the Efficient Conversion of Corn Husk Filament and Corn Husk Powder to Valuable Materials via a Sustainable and Clean Biorefinery Process

A Review of the Use of Natural Fibers in Cement Composites: Concepts, Applications and Brazilian History

Valorization of Date Palm Waste for Plastic Reinforcement: Macro and Micromechanics of Flexural Strength

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