Density profile as a tool in assessing quality of new composite

Belini, Ugo Leandro; Fiorelli, Juliano; Savastano, Holmer; Filho, Mário Tomazello

doi:10.1590/s1516-14392013005000186

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…When the composite panel was subjected to mechanical stress, the low particle size difference between the particles also contributed to the uniform stress and strain distribution throughout the fibers. 62 The findings were consistent with a study by Belini et al 170 where, the large difference in fiber particle size may result in poor compatibility between fibers in each layer, increasing the possibility of delamination and lowering sandwich composite panel performance. Therefore, raising the fibrillation degree on fiber through a refining process is regarded as a viable method for reducing particle size variation and enhancing fiber particle compatibility in composite panel.…”

Section: The Influence Of Fiber Physico-chemical Propertiessupporting

confidence: 89%

Review on the influencing factors towards improving properties of composite insulation panel made of natural waste fibers for building application

Shakir

Ahmad

Ramli

et al. 2023

Journal of Industrial Textiles

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The low performance of insulation panels has received great attention from many researchers and engineers to improve their properties as it has become a limiting factor that minimize their usage specifically as insulation building material. Recently, there has been an increase in interest in the development of composite insulation panels made from natural waste fiber. Due to the abundance of natural waste fiber generated by the agricultural industry, it has made them suitable to be utilized as raw material for composite insulation panels. Having improper waste disposal management might result in these massive quantities of valuable natural waste fiber having a detrimental effect on our ecosystem and contributing to various environmental pollution. A composite insulation panel made from natural waste fibers has unique and versatile features in terms of thermal, physical, and mechanical properties. Seeing such potential, this paper presents a review on the influencing factors towards improving comprehensive properties of composite insulation panels. Factors that influence the properties of the panel, such as the physico-chemical properties of fiber, fiber geometrical structure, and fiber treatment were discussed. Previous and recent research efforts related to factors influencing the properties of composite insulation panels were also compiled. Last but not least, the suitable criteria, limiting factors, and condition of the fiber used in composite insulation panels were also all highlighted.

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Section: The Influence Of Fiber Physico-chemical Propertiessupporting

confidence: 89%

Review on the influencing factors towards improving properties of composite insulation panel made of natural waste fibers for building application

Shakir

Ahmad

Ramli

et al. 2023

Journal of Industrial Textiles

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“…Figure 3 shows the influence of the rape straw share on the density profile of the 16-mm particleboard. Similar profiles were obtained by Belini et al (2014) for composites made of bagasse and eucalyptus. They detected decreased and inhomogeneous density in the central region along the thickness for panels with 75% and 100% bagasse, indicative of incomplete resin cure, or improper particle size and anatomical structure of the particles in the inner panel, or changes in the press cycle variables.…”

Section: Physical Testingsupporting

confidence: 77%

Morphology, physical, and mechanical properties of particleboard made from rape straw and wood particles glued with urea-formaldehyde resin

Coşereanu

Cerbu

2019

BioRes

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The morphology, physical, and mechanical properties were investigated for single-layer particleboard made with various proportional contents of wood and rape stalk particles glued with urea-formaldehyde resin. Fine crushed rape stalk particles were used for the experimental particleboards. The weight ratios of rape-to-wood particles were 0:100, 10:90, 30:70, 50:50, and 70:30. Mixed beech and spruce wood particles with percentages of 30% for beech wood and 70% for spruce wood were considered for the configuration. Urea-formaldehyde resin with a solid content of 66 ± 1% was added to the single-mat configuration at a level of 12%, based on the weight of the particles. Physical (density, water absorption, and thickness swelling) and mechanical (modulus of elasticity, bending strength, internal bond strength) investigations on the particleboards obtained in the laboratory conditions were conducted. The results were compared to the requirements of the EN 312 (2004) standard. In addition, morphological observation at macro- and micro-scale and vertical density profile analysis was conducted on particleboards in order to characterize the interaction between wood-rape particles and resin. Variations of the structure and density were observed relative to thickness, providing information concerning to the internal bond performance of the panels.

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“…It is also applied in other materials similar to wood. For example, Zhaohui et al [18] use this same technique to determine the radial density variation profile of bamboo; while Belini et al [19] use densitometry to evaluate the quality of medium density fiberboards (MDF).…”

Section: Introductionmentioning

confidence: 99%

Application of the X-ray densitometry in the evaluation of the quality and mechanical properties of biomass pellets

Moya

Filho

et al. 2015

Fuel Processing Technology

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a b s t r a c tThe use of the X-ray technique and the X-ray densitometry to determine pellet particle distribution and to understand the biomass compaction and its effects in pellet properties has been limited. The present work evaluates the quality of pellets manufactured with several lignocellulosic materials by using X-ray photography for studying surface cracks and irregularities, and by using X-ray densitometry to evaluate density and its variation in longitudinal and transversal directions. Density values and their variation were correlated to the pellets' mechanical properties (mechanical durability and compression resistance). It was found that X-ray photography may be applied to evaluate the presence of cracks and irregularities in the pellets' surface; however, these are not indicators of pellet durability or compression resistance. Moreover, density evaluation by the X-ray densitometry technique allowed the determination of the pellets' mechanical resistance and durability. A negative correlation was observed between the force at break and the coefficient of variation of density. No correlation was found between the mechanical durability and the average density or its variation. According to the above results, X-ray technique can be utilized to study the pellet quality.

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Density profile as a tool in assessing quality of new composite

Cited by 7 publications

References 8 publications

Review on the influencing factors towards improving properties of composite insulation panel made of natural waste fibers for building application

Review on the influencing factors towards improving properties of composite insulation panel made of natural waste fibers for building application

Morphology, physical, and mechanical properties of particleboard made from rape straw and wood particles glued with urea-formaldehyde resin

Application of the X-ray densitometry in the evaluation of the quality and mechanical properties of biomass pellets

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