Thermal insulation potential of wood-cereal straws/plaster composite

Mehrez, Insaf; Hachem, Houda; Jemni, Abdelmajid

doi:10.1016/j.cscm.2022.e01353

Cited by 15 publications

(14 citation statements)

References 28 publications

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“…The combination of both components, a biodegradable polymer matrix and cellulosic reinforcements, allows the obtainment of composites for applications in short-term performance, helping in the development of policies of environmental control in a more economically competitive manner [ 18 ]. In this sense, the use of residues of cellulose or plants without added value [ 16 , 19 , 20 , 21 , 22 ], such as barley straw [ 23 , 24 ], can ensure the provisioning of raw materials at a very low price, so as to guarantee a continuous production, therefore decreasing the cost over a longer time. Moreover, the use of residues can also help to implement policies of rural development due to the added value reached by the residue.…”

Section: Introductionmentioning

confidence: 99%

Simulated Environmental Conditioning of PHB Composites Reinforced with Barley Fibres to Determine the Viability of Their Use as Plastics for the Agriculture Sector

2023

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Nowadays, the search for new materials with a sustainable character to reduce the production of residues is under continuous research. In this sense, fully biodegradable composites based on polyhydroxybutyrate and different pretreated fibres coming from barley straw have been fabricated, and their resistance to environmental controlled conditions have been characterized. The materials were already compounded in a kinetic mixer and injection-moulded as specimens for tensile assay to be aged in a Xenotest chamber so as to simulate environmental conditioning. The samples, after accelerated aging, were characterized thus: mechanical characterization (tensile assay), water uptake (immersion and contact angle), and surface observation (optical and SEM microscopy). The incorporation of the fibres helps the composite to keep its structure for a longer time. On the other hand, the presence of the fibres increases the water uptake capacity to allow water permeation in the composite, which allows final degradation, characterised by a significant drop in properties after one month of exposure to simulated environmental conditions.

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Section: Introductionmentioning

confidence: 99%

Simulated Environmental Conditioning of PHB Composites Reinforced with Barley Fibres to Determine the Viability of Their Use as Plastics for the Agriculture Sector

2023

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“…Fourier transform infrared spectroscopy (FTIR) analysis was performed on the raw materials in their natural state. The IR spectra of the samples were recorded using the ATR FTIR equipment, model Cary 630, and will be presented in the frequency range 4000 to 500 (cm −1 ) as reported by other authors [2,7,34].…”

Section: Infrared Spectroscopy Analysismentioning

confidence: 99%

“…In summary, empirical evidence shows that studies for the development of construction materials from natural fibers is not a recent practice; however, for decades, natural resource materials have been replaced by industrial materials of high contained energy [34,35].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Thermal Insulating Material Based on a Wheat Straw and Recycled Paper Cellulose to Be Applied in Buildings by Blowing Method

2022

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The thermal envelope is a key component of a building’s energy efficiency. Therefore, considerable efforts have been made to develop thermal insulating materials with a better performance than the existing products. However, in the current climate change scenario, these materials must be sustainable, principally during their production stage. In this context, the use of recycled raw materials and agro-industrial waste can be the basis of a material with a low environmental impact and a good thermal performance. In this study, cellulose and wheat straw were characterized. Then, they were mixed in different proportions and densities and the best thermal behavior was selected. The materials were chemically analyzed by TAPPI 2007, thermogravimetric and infrared spectroscopy, together with the measurement of their thermal conductivity with a thermal property analyzer based on the transient line heat source method. The results show that both raw materials are chemically similar to each other. When mixed, they have a thermal conductivity ranging from 0.031 to 0.036 (W/mK), being comparable with several conventional thermal insulators. On the other hand, to achieve the commercial use of this material, an installation through a blowing process has been proposed and proves to be highly promising, achieving a proper density and efficiency in its application.

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“…Gypsum and Portland cement are traditional mineral constituents used extensively in the manufacture of wood–mineral composites [ 8 , 9 , 10 ]. Although these composites have a similar shape to conventional EWP, they have a wood content of less than 50% and a panel density of about 1100 kg/m 3 , which is far from the level required for conventional EWP.…”

Section: Introductionmentioning

confidence: 99%

Development of Mineral-Bonded Plywood with Magnesium Oxychloride as a Binder Using the Hot-Pressing Process

Shalbafan

Thoemen

2023

Polymers

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Environmentally friendly plywood panels were produced by a hot-pressing process using magnesium oxychloride cement (MOC) as a no-added formaldehyde adhesive. Magnesium oxychloride cement binders were prepared with different molar ratios of MgO:MgCl2 (M/C) and H2O:MgCl2 (W/C) ranging from 6 to 12 and 15 to 21, respectively, for plywood production. The binder properties measured were gel time, differential scanning calorimetry (DSC) and Fourier transom infrared spectroscopy (FTIR). The quality of the plywood panels was analyzed based on their mechanical (shear and bending) and physical (thickness swelling and water absorption) properties. A positive effect on the properties of the MOC binder as well as on the properties of the plywood was observed by increasing the molar ratio M/C up to a value of 9. The shear and flexural properties of the plywood specimens were negatively affected by further increasing the molar ratio M/C to 12 and the molar ratio W/C from 15 to 21. Differential scanning calorimetry analysis showed a peak temperature of less than 100 °C for MOC curing, which meets the requirements of hot press technology. No delamination of the plywood specimens was observed after 24 h immersion in tap water or 6 h immersion in boiling water and after a cyclic delamination test. In general, mineral-bonded plywood with magnesium oxychloride shows promising properties for indoor and outdoor use, although the binder quality should still be improved.

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Thermal insulation potential of wood-cereal straws/plaster composite

Cited by 15 publications

References 28 publications

Simulated Environmental Conditioning of PHB Composites Reinforced with Barley Fibres to Determine the Viability of Their Use as Plastics for the Agriculture Sector

Simulated Environmental Conditioning of PHB Composites Reinforced with Barley Fibres to Determine the Viability of Their Use as Plastics for the Agriculture Sector

Characterization of a Thermal Insulating Material Based on a Wheat Straw and Recycled Paper Cellulose to Be Applied in Buildings by Blowing Method

Development of Mineral-Bonded Plywood with Magnesium Oxychloride as a Binder Using the Hot-Pressing Process

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