Thermophysical characterization of Posidonia Oceanica marine fibers intended to be used as an insulation material in Mediterranean buildings

Hamdaoui, Ons; Ibos, Laurent; Mazioud, Atef; Safi, Mohamed; Limam, Oualid

doi:10.1016/j.conbuildmat.2018.05.195

Cited by 29 publications

(16 citation statements)

References 18 publications

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“…Eco-friendly biodegradable composites made with natural fibers are more efficient, long-term, and adaptable solution to environmental and economic problems Many scientific studies focus on testing composites based on Posidonia-Oceanica (PO) alone or mixed with another type of fiber in order to develop efficient, low-cost, and sustainable bio-composite material. [1][2][3][4][5] The addition of PO seagrass and wood fibers products is a sustainable and environmentally friendly solution to improve the major properties of gypsum products. 1 PO fibers have thermal conductivity and diffusivity comparable to conventional insulation materials.…”

Section: Introductionmentioning

confidence: 99%

“…3 Biocomposites with PO and pine-wood particles were tested as an alternative to structural wood particle boards in construction. 3 Hamdaoui et al 4 focus on thermal and mechanical characteristics of a cement paste reinforced with PO balls for building application. Safont et al 5 suppose the valorization of PO seagrass waste in industrial food packaging applications The effects of alkali treatment was investigated on various natural fibers at different conditions (time, pressure, and concentration) by many researchers.…”

Section: Introductionmentioning

confidence: 99%

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Valorization of Posidonia-Oceanica leaves for the building insulation sector

Mehrez

Hachem

Gheith

et al. 2022

Journal of Composite Materials

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A new bio-composite material appropriate for building thermal insulation is proposed. The hydrophilic, thermal, and mechanical properties of composites made with Posidonia-Oceanica leaves, are experimentally investigated. The effect of two different sizes of fibers (natural and crushed leaves) as well as the effect of the chemical treatment (1% sodium hydroxide) are studied. For this purpose, different parallelepipedic specimens of dimensions 270 × 270 × 30 mm3 (thermal properties tests) and 160 × 40 × 40 mm3 (mechanical properties tests) were prepared by varying densities of leaves (0, 5, 10, 15, 20, and 30% by volume). In comparison to the fiber size effect, the results reveal that fiber loading has a significant impact on the mechanical and thermal characteristics of composites. Alkali treatment can improve the compressive and flexural strength of bio-composites. The novel bio-composites have low thermal conductivity (0.09 W.m−1K−1 when 30% of reduced size Posidonia-Oceanica leaves were loaded into the reference mortar) and acceptable mechanical performances. Results also show (1) The addition of treated fiber improves the ductility of the material. (2) The fracture toughness is 75% greater than reference mortar. (3) The use of crushed fibers decreases the composite’s mechanical strengths. (4) The flexural strength decreases with the fibers content and increase after 1% sodium hydroxide treatment. It can be concluded that the proposed bio-composite can be employed as thermal insulation material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Valorization of Posidonia-Oceanica leaves for the building insulation sector

Mehrez

Hachem

Gheith

et al. 2022

Journal of Composite Materials

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“…A probe (reference 5465) with a radius of 3189 mm was used. A heating power of 80 mW was applied for 20 s. Further details concerning this method are available in [ 21 , 22 , 23 , 24 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics

et al. 2021

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Phosphogypsum (PG) is a waste (or by-product) of the production of phosphoric acid, a basic constituent in the manufacturing of modern fertilizers. The annual production of phosphogypsum in Tunisia is currently estimated to be 10 million tons. Its storage in slag in close proximity to production plants generates pollution problems; however, valorization may be a solution. The present paper proposes a simple process for the valorization of this by-product into a construction material. Several physicochemical characterizations are used to prove the characteristics of samples. The chemical composition shows that PG is a gypsum compound with several impurities. The morphological analyses show that the powder materials are mesoporous with a lower specific area. The structural characterizations show that these solids play the role of a water pump as the degree of hydration changes from 2 to 0 and vice versa, depending on the temperature. Mechanical and thermal analyses show that the prepared formulation is brittle and insulating, which presents opportunities for it to be used as a decoration material.

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“…Today, there are efforts to revive this industry, e.g., Posidonia oceanica balls are gathered and sold as insulating material. Their thermophysical behavior seems to be very promising for this purpose and only a few pre-treatment steps with sodium hydroxide could enhance the properties of Posidonia fibers to a level comparable to industrial insulating materials (Hamdaoui et al, 2018). Another approach for construction purposes has been registered for patent in 2018 (Pavlakis, 2018).…”

Section: Technical Applicationsmentioning

confidence: 99%

The Cell Wall of Seagrasses: Fascinating, Peculiar and a Blank Canvas for Future Research

Pfeifer

Classen

2020

Front. Plant Sci.

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Seagrasses are a polyphyletic group of angiosperm plants, which evolved from early monocotyledonous land plants and returned to the marine environment around 140 million years ago. Today, seagrasses comprise the five families Zosteraceae, Hydrocharitaceae, Posidoniaceae, Cymodoceaceae, and Ruppiaceae and form important coastal ecosystems worldwide. Despite of this ecological importance, the existing literature on adaption of these angiosperms to the marine environment and especially their cell wall composition is limited up to now. A unique feature described for some seagrasses is the occurrence of polyanionic, low-methylated pectins mainly composed of galacturonic acid and apiose (apiogalacturonans). Furthermore, sulfated galactans have been detected in some species. Recently, arabinogalactan-proteins (AGPs), highly glycosylated proteins of the cell wall of land plants, have been isolated for the first time from a seagrass of the baltic sea. Obviously, seagrass cell walls are characterized by new combinations of structural polysaccharide and glycoprotein elements known from macroalgae and angiosperm land plants. In this review, current knowledge on cell walls of seagrasses is summarized and suggestions for future investigations are given.

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Thermophysical characterization of Posidonia Oceanica marine fibers intended to be used as an insulation material in Mediterranean buildings

Cited by 29 publications

References 18 publications

Valorization of Posidonia-Oceanica leaves for the building insulation sector

Valorization of Posidonia-Oceanica leaves for the building insulation sector

The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics

The Cell Wall of Seagrasses: Fascinating, Peculiar and a Blank Canvas for Future Research

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