Do production processes influence the mechanical properties of bleached alfa pulpboard?

Ellouze, Ameni; Jesson, DA; Cheikh, Ridha Ben

doi:10.1007/s10570-017-1261-6

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…2C and D). These deformations are due to the manufacturing process of the Alfa pulp during which the fibers undergo severe compressive stresses which cause a sudden change in the fiber axis alignment (Ellouze et al, 2017;Seth, 2006) and can even generate nodes which may strongly affect the mechanical properties of the fiber and subsequently of the composite. This can be explained by the fact that the Alfa fiber consists of micro fibrils of cellulose bonded together by lignin and hemicellulose (Fig.…”

Section: Morphological Characterizationmentioning

confidence: 99%

Could Alfa Fibers Substitute Glass Fibers in Composite Materials?

Abdallah

Cheikh

Paiva

2019

International Polymer Processing

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In the present work polyester resin composites with Alfa fibers in the form of pulp were prepared and their properties were compared with those of polyester resin reinforced with glass fibers, the latter composites being widely used for structural applications. The composites were prepared using two manufacturing processes, namely hand lay-up and vacuum molding, to assess the influence of the process on the composites properties. Firstly, the tensile properties for the two composites were evaluated. The composites thermal properties were studied by differential scanning calorimetry and thermogravimetric analysis. Finally, the morphology of a glass fiber composite (GFC) and Alfa pulp composite (APC) was analyzed by scanning electron microscopy, to characterize the composites surface and cross-sections.

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Section: Morphological Characterizationmentioning

confidence: 99%

Could Alfa Fibers Substitute Glass Fibers in Composite Materials?

Abdallah

Cheikh

Paiva

2019

International Polymer Processing

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“…As all lignocellulosic materials, alfa is mainly composed of a complex network of cellulose (38.8 ‐ 46.1%) hemicellulose (24 ‐ 33.5%) and lignin (19.9 ‐ 24%) . This plant is commonly used in the production of pulp for paper industry . Nowadays, it is widely used as polymeric reinforcement due to its exceptional properties, which give high performance materials in addition to its biodegradability and renewability .…”

Section: Introductionmentioning

confidence: 99%

Non‐Isothermal Curing Kinetics of Alkali‐Treated Alfa Fibers/Polybenzoxazine Composites Using Differential Scanning Calorimetry

2020

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The exploration of curing process of benzoxazine resins, which possess outstanding features, is crucial for practical and advanced applications. In this study, bisphenol A-aniline based benzoxazine (BA-a) composites reinforced with alkali treated alfa fibers (TAF) were prepared. The influence of different loadings of the TAF on the curing kinetics of BA-a was investigated using non-isothermal differential scanning calorimetry (DSC) at different heating rates. Isoconversional integral methods or model free kinetics, namely, the iterative Kissinger-Akahira-Sunose (it-KAS), iterative Flynn-Wall-Ozawa (it-FWO), Sbirrazzuoli methodology (VYA/CE) and Trache-Abdelaziz-Siwa-ni (TAS) methods have been applied to the experimental data in order to evaluate the curing kinetic parameters. The study revealed that the presence of TAF improved the crosslinking reaction of benzoxazine and reduced the activation energy. The pre-exponential factor exhibited the same trend as the activation energy. The reaction model, examined for all composites, showed that all systems were accurately presented by an autocatalytic reaction model. The Avrami-Erofeev model was the most appropriate for describing the cure kinetics and revealed a good agreement with experimental data.

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