Posidonia oceanica as thermal insulation: Determination of the minimum bulk density, according to project specifications, for its use as a building solution on a flat roof

Carmona, Cristian; Horrach, Gabriel; Oliver, Carles; Forteza, Francisco J.; Muñoz, Joan

doi:10.7764/rdlc.17.2.250

Cited by 6 publications

(6 citation statements)

References 8 publications

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“…13 Other authors evaluated the minimum bulk density for the use of Posidonia as a building solution on a flat roof. 14 Stipa tenacissima is a perennial grass of arid and semiarid lands of North Africa and southern Spain. Its Arabic name is the alfa plant.…”

Section: ■ Introductionmentioning

confidence: 99%

“…oceanica and pine wood particles in a polyurethane matrix, and investigate their performance as structural panels . Other authors evaluated the minimum bulk density for the use of Posidonia as a building solution on a flat roof …”

Section: Introductionmentioning

confidence: 99%

“… 13 Other authors evaluated the minimum bulk density for the use of Posidonia as a building solution on a flat roof. 14 …”

Section: Introductionmentioning

confidence: 99%

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Influence of Anatomy, Microstructure, and Composition of Natural Fibers on the Performance of Thermal Insulation Panels

Ayadi,

Segovia,

Baffoun

et al. 2023

ACS Omega

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The growing interest in environmentally friendly materials is leading to a re-evaluation of natural fibers for industrial applications in order to meet sustainability and low-cost objectives, especially for thermal insulation of buildings. This paper deals with the chemical and physical characterization of fibers extracted from seagrass ( Posidonia oceanica ) and alfa grass ( Stipa tenacissima ) for a possible substitution of synthetic materials for thermal insulation. Hemp ( Cannabis sativa ), a fiber broadly used, was also studied for comparison. The parameters characterized include porosity, thermal degradation, elemental composition, skeletal and particle density of the fibers as well as investigation of the thermal conductivity of fiber-based panels. Several technologies were involved in investigating these parameters, including mercury intrusion, thermogravimetric analysis, fluorescence spectroscopy, and fluid pycnometry. The fibers showed a degradation temperature between 316 and 340 °C for Posidonia , between 292 and 326 °C for alfa, and between 300 and 336 °C for hemp fibers. A high porosity allied with a reduced pore size was revealed for Posidonia (77%, 0.54 μm) compared to hemp (75%, 0.61 μm) and alfa (57%, 2.1 μm) raw fibers, leading to lower thermal conductivity values for the nonwoven panels based on Posidonia (0.0356–0.0392 W/m.K) compared to alfa (0.0365–0.0397 W/m.K) and hemp (0.0387–0.0427 W/m.K). Bulk density, operating temperature, and humidity conditions have been shown to be determining factors for the thermal performance of the panels.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Anatomy, Microstructure, and Composition of Natural Fibers on the Performance of Thermal Insulation Panels

Ayadi,

Segovia,

Baffoun

et al. 2023

ACS Omega

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“…Seagrass rhizomes in Southeast Asia are used in traditional medicine and as an emergency food source (UNEP, 2004). In the Balearic Islands (Mediterranean), house rooftops are made from Posidonia oceanica , rendering the seagrass habitat a “manufacturing asset” (Carmona et al, 2018). In the UNESCO report, the areal extent of seagrass habitats was unknown for 19 WH properties, no consideration was given to the importance of seagrass habitats toward the OUV and the associated community of each WH property, and information about their status, trend, and major threats were not provided (UNESCO, 2020).…”

Section: Introductionmentioning

confidence: 99%

Conservation status, research, and knowledge of seagrass habitats in World Heritage properties

Losciale

Day

Heron

2022

Conservat Sci and Prac

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Climate change is increasingly threatening World Heritage (WH) properties and their Outstanding Universal Value (OUV). Climate change impacts the attributes that collectively contribute to the OUV; these attributes can be natural (e.g., seagrass) or cultural (e.g., monuments). A recent UNESCO report showed that seagrass habitats within WH properties are estimated to hold 25% of the global seagrass blue carbon asset. Globally, seagrass habitats provide a wide range of benefits to adjacent ecosystems and coastal human communities, yet they have been declining due to direct anthropogenic and climate change stressors. However, the UNESCO report did not provide any information about the relative importance of the attribute “seagrass habitats” toward the OUV and associated communities of WH properties, nor about their conservation status. This study builds upon this previous work by assessing the relative importance of seagrass habitats toward the values of WH properties and by reviewing the current knowledge about the conservation status, threats, monitoring, and management of seagrass habitats within WH properties. Seagrass was identified as an attribute of Very High or High importance to 9 of 28 WH properties. Through analysis of UNESCO documents and scientific literature, we highlight the lack of research, monitoring, and management instruments addressing the protection of seagrass from climate change impacts within these 28 WH properties. Notably, climate change threats to WH seagrass habitats are poorly addressed within WH documentation. The insufficient analysis and reporting of climate impacts on seagrass within WH properties point to an underestimation of the value of this marine ecosystem broadly.

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“…The fibrous balls show some promising material properties, e.g., slow decomposition and low flammability. Because both features make them attractive as insulating material, this idea is being developed and pursued by some companies today [13,14]. Within this field of direct usage of the fibers, innovative ideas have arisen.…”

Section: Introductionmentioning

confidence: 99%

“Neptune Balls” Polysaccharides: Disentangling the Wiry Seagrass Detritus

Pfeifer

2021

Polymers

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Each year, high amounts of dead seagrass material are washed ashore at beaches world-wide. In the Mediterranean region, the seagrass Posidonia oceanica is responsible for huge agglomerates of ball-like seagrass litter. As these are often removed due to touristic reasons, a reuse method would be a step towards a more ecologically oriented society. In this study, the main polysaccharide components were analyzed, in order to propose possible usage options. To do this, different aqueous fractions were extracted, analyzed by classical carbohydrate analysis methods (GC-FID/MS, colorimetric assay and elemental analysis), and purified by ion-exchange chromatography, as well as selective precipitation with a detecting agent for highly glycosylated glycoproteins. The obtained purified fractions were analyzed in detail and a linkage-type analysis of the most promising extract was conducted via permethylation. Only low amounts of glycoproteins, as well as medium amounts of the characteristic apiogalacturonan were likely to be present, while xylan seemed to be the most abundant polysaccharide in most fractions. A partial structural proposal showed general accordance with land plant xylans, presenting reuse options in the field of biofuel and bioplastic generation.

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Posidonia oceanica as thermal insulation: Determination of the minimum bulk density, according to project specifications, for its use as a building solution on a flat roof

Cited by 6 publications

References 8 publications

Influence of Anatomy, Microstructure, and Composition of Natural Fibers on the Performance of Thermal Insulation Panels

Influence of Anatomy, Microstructure, and Composition of Natural Fibers on the Performance of Thermal Insulation Panels

Conservation status, research, and knowledge of seagrass habitats in World Heritage properties

“Neptune Balls” Polysaccharides: Disentangling the Wiry Seagrass Detritus

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