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Статті в журналах з теми "Bio-Sourced materials":
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Elbaz, Abdelrahman, Zhenzhu He, Bingbing Gao, Junjie Chi, Enben Su, Dagan Zhang, Songqin Liu, Hua Xu, Hong Liu, and Zhongze Gu. "Recent biomedical applications of bio-sourced materials." Bio-Design and Manufacturing 1, no. 1 (February 26, 2018): 26–44. http://dx.doi.org/10.1007/s42242-018-0002-5.
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Ehsani, Masoume, Denis Kalugin, Huu Doan, Ali Lohi, and Amira Abdelrasoul. "Bio-Sourced and Biodegradable Membranes." Applied Sciences 12, no. 24 (December 14, 2022): 12837. http://dx.doi.org/10.3390/app122412837.
Анотація:
Biodegradable membranes with innovative antifouling properties are emerging as possible substitutes for conventional membranes. These types of membranes have the potential to be applied in a wide range of applications, from water treatment to food packaging and energy production. Nevertheless, there are several existing challenges and limitations associated with the use of biodegradable membranes in large scale applications, and further studies are required to determine the degradation mechanisms and their scalability. Biodegradable membranes can be produced from either renewable natural resources or synthesized from low-molecular monomers that increase the number of possible structures and, as a result, greatly expand the membrane application possibilities. This study focused on bio-sourced and synthesized biodegradable polymers as green membrane materials. Moreover, the article highlighted the excellent antifouling properties of biodegradable membranes that assist in improving membrane lifetime during filtration processes, preventing chemical/biological disposal due to frequent cleaning processes and ultimately reducing the maintenance cost. The industrial and biomedical applications of biodegradable membranes were also summarized, along with their limitations. Finally, an overview of challenges and future trends regarding the use of biodegradable membranes in various industries was thoroughly analyzed.
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Gouda, Abdelaziz, Manuel Reali, and Clara Santato. "Bio-Sourced, Potentially Biodegradable Materials for Fast Response Moisture Sensors." ECS Meeting Abstracts MA2020-01, no. 35 (May 1, 2020): 2425. http://dx.doi.org/10.1149/ma2020-01352425mtgabs.
4
Ba, Labouda, Ikram El Abbassi, Cheikh Sidi Ethmane Kane, A. Moumen Darcherif, and Mamoudou Ndongo. "The Challenges of Local and Bio-Sourced Materials on Thermal Performance: Review, Classification and Opportunity." International Journal of Engineering Research in Africa 47 (March 2020): 85–101. http://dx.doi.org/10.4028/www.scientific.net/jera.47.85.
Анотація:
This paper reviews local and bio-sourced materials for construction through their thermomechanical characteristics, but with an emphasis on their thermal conductivity that allows us to assess the thermal performance (insulation) of these materials. Then, we discuss the energy problems in Mauritania, while highlighting the local and bio-sourced materials existing in this country. These materials could be an alternative to solve these energy problems. Finally, we focus on the thermal performance of Typha Australis, a plant that grows abundantly in fresh water mainly in Senegal and Mauritania, which would have good advantages over the thermal performance of the building.
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Ranefjärd, Oskar, Paulien B. Strandberg-de Bruijn, and Lars Wadsö. "Hygrothermal Properties and Performance of Bio-Based Insulation Materials Locally Sourced in Sweden." Materials 17, no. 9 (April 26, 2024): 2021. http://dx.doi.org/10.3390/ma17092021.
Анотація:
In recent years, there has been a paradigm shift in the building sector towards more sustainable, resource efficient, and renewable materials. Bio-based insulation derived from renewable resources, such as plant or animal fibres, is one promising group of such materials. Compared to mineral wool and polystyrene-based insulation materials, these bio-based insulation materials generally have a slightly higher thermal conductivity, and they are significantly more hygroscopic, two factors that need to be considered when using these bio-based insulation materials. This study assesses the hygrothermal properties of three bio-based insulation materials: eelgrass, grass, and wood fibre. All three have the potential to be locally sourced in Sweden. Mineral wool (stone wool) was used as a reference material. Hygrothermal material properties were measured with dynamic vapour sorption (DVS), transient plane source (TPS), and sorption calorimetry. Moisture buffering of the insulation materials was assessed, and their thermal insulation capacity was tested on a building component level in a hot box that exposed the materials to a steady-state climate, simulating in-use conditions in, e.g., an external wall. The tested bio-based insulation materials have significantly different sorption properties to stone wool and have higher thermal conductivity than what the manufacturers declared. The hot-box experiments showed that the insulating capacity of the bio-based insulators cannot be reliably calculated from the measured thermal conductivity alone. The results of this study could be used as input data for numerical simulations and analyses of the thermal and hygroscopic behaviour of these bio-based insulation materials.
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Sid, Saurabh, Rahul S. Mor, Anand Kishore, and Vijay Singh Sharanagat. "Bio-sourced polymers as alternatives to conventional food packaging materials: A review." Trends in Food Science & Technology 115 (September 2021): 87–104. http://dx.doi.org/10.1016/j.tifs.2021.06.026.
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Zhang, Qianmin, Xiaojuan Wei, Yongli Ji, Li Yin, Zaizai Dong, Feng Chen, Mingqiang Zhong, Jian Shen, Zhenjie Liu, and Lingqian Chang. "Adjustable and ultrafast light-cured hyaluronic acid hydrogel: promoting biocompatibility and cell growth." Journal of Materials Chemistry B 8, no. 25 (2020): 5441–50. http://dx.doi.org/10.1039/c9tb02796c.
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Grignard, B., J. M. Thomassin, S. Gennen, L. Poussard, L. Bonnaud, J. M. Raquez, P. Dubois, et al. "CO2-blown microcellular non-isocyanate polyurethane (NIPU) foams: from bio- and CO2-sourced monomers to potentially thermal insulating materials." Green Chemistry 18, no. 7 (2016): 2206–15. http://dx.doi.org/10.1039/c5gc02723c.
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Mgaya, James, Ginena B. Shombe, Siphamandla C. Masikane, Sixberth Mlowe, Egid B. Mubofu, and Neerish Revaprasadu. "Cashew nut shell: a potential bio-resource for the production of bio-sourced chemicals, materials and fuels." Green Chemistry 21, no. 6 (2019): 1186–201. http://dx.doi.org/10.1039/c8gc02972e.
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Le Barbenchon, Louise, and Philippe Viot. "From bio-sourced to bio-inspired cellular materials: A review on their mechanical behavior under dynamic loadings." Materials Letters 355 (January 2024): 135487. http://dx.doi.org/10.1016/j.matlet.2023.135487.
Дисертації з теми "Bio-Sourced materials":
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Matzen-Fredel, Anna. "Immobilisation of metathesis catalysts on mesoporous materials for the conversion of bio sourced fatty compounds." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10174.
Анотація:
Alors que les ressources fossiles décroissent, le concept de bio-raffinerie est une approche très attrayante pour la production de produits chimiques à partir de ressources renouvelables. Dans ce contexte, les dérivés d’acides gras insaturés, obtenus par hydrolyse de triglycérides issus de végétaux, sont une catégorie importante de substrats. Leur conversion en composés à haute valeur ajoutée est un objectif majeur qui peut être atteint grâce à la catalyse, et plus particulièrement grâce à la métathèse des alcènes. De plus, dans un esprit de meilleure séparation entre produits et catalyseurs, et pour des questions de recyclage, l’emploi de catalyseurs hétérogènes est de grand intérêt. L’hétérogénéisation de catalyseurs commerciaux à base de ruthénium a été entreprise. Les matériaux hybrides ont été préparés en deux étapes: après une cationisation à l’aide de sels d’argent, les espèces organométalliques ont été immobilisées par échange ionique dans les aluminosilicates mésoporeuses de type MCM-41. Ces nouveaux catalyseurs ont été caractérisés par RMN du solide, IR, DRX, BET, analyse élémentaire et ATG. Ils ont été employés avec succès dans différentes réactions de métathèse impliquant le substrat-type, l’oléate de méthyle. Les réactions étudiées sont l’homométathèse, l’éthénolyse et la métathèse croisée avec des oléfines fonctionnalisées issues des acides acrylique et crotonique. Bien que le recyclage n’ait pas été couronné de succès, les catalyseurs supportés permettent de réaliser toutes ces réactions, ce qui représente dans certains cas le premier exemple de telles transformations par catalyse hétérogène avec des activités et sélectivités élevéesAs fossil resources constantly decrease, the concept of bio-refinery is a most attractive approach to generate chemicals from renewable resources. In this context, unsaturated fatty acids derived from the hydrolysis of crops extracted-triglycerides are a major class of substrates. These must be converted to high added-value derivatives: catalytic transformations can play a key role in this, by converting such compounds into other functionalized derivatives. A most attractive reaction to meet this challenge is olefin metathesis. Based on product/catalyst separation and catalyst recycling issues, use of heterogeneous catalysts is of high interest.We thus prepared heterogenized commercial ruthenium catalysts. The hybrid materials were prepared in a two-step procedure: after silver salt-mediated cationization, the organometallic species were immobilized by ion exchange on mesoporous aluminosilicates of the MCM-41 family. The novel catalysts were characterized by solid-state NMR, IR, XRD, BET, elemental analysis and TGA. They were successfully applied in several metathesis reactions involving the archetypic methyl oleate, a C18 unsaturated ester, with different grades of purity. The probed reactions were self-metathesis, ethenolysis and cross-metathesis with functionalized olefins derived from acrylic and crotonic acids. Though recycling was not completely successful, the supported catalysts were able to efficiently catalyze all these transformations, providing in some instances the first heterogeneously examples of such reactions with high activity and selectivity
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Matzen, Anna Katharina [Verfasser]. "Immobilisation of metathesis catalysts on mesoporous materials for the conversion of bio sourced fatty compounds / Anna Katharina Matzen." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1049350359/34.
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Ogabi, Raphael. "Experimental study of the fire behavior of synthetic and bio-sourced composite materials impacted by heat flux density on a medium and large scale." Electronic Thesis or Diss., Bourges, INSA Centre Val de Loire, 2024. http://www.theses.fr/2024ISAB0001.
Анотація:
Dans le but d'améliorer la compréhension du comportement au feu des matériaux composites synthétiques et biosourcés, l'objectif de cette thèse vise à mettre en évidence des phénomènes physico-chimiques en rapport avec la sécurité incendie pour des matériaux pouvant être utilisés dans des applications aéronautiques et/ou automobiles. Dans ce contexte, une partie des tests expérimentaux a été réalisée à l'aide du brûleur NexGen développé suivant les exigences de la FAA afin de réaliser des tests de certification au feu. La deuxième partie des résultats a été obtenue à l’aide d’un cône calorimètre dans le but de mettre en évidence le comportement au feu des matériaux composites à moyenne échelle. En plus des tests de certification au feu, la présente étude de recherche s’est intéressée au développement de matériaux composites biosourcés. En effet, en considérant le caractère non biodégradable des matériaux composites synthétiques tels que le carbone-PEKK, le carbone-BMI et le carbone-phénolique, le manque de travaux traitant du sujet et la problématique du réchauffement climatique, cette thèse propose une caractérisation physico-chimique de matériaux composites biosourcés soumis à différentes densités de flux de chaleur. Les matériaux composites biosourcés fabriqués dans le cadre de cette thèse sont constitués de fibres de lin et de fibres de banane ; fabriqués selon la méthode VARTM. Dans le but d’améliorer les propriétés thermo-physiques de ces matériaux pour augmenter leurs performances du point de vue sécurité incendie, une couche supplémentaire de retardateur de flamme a été appliquée sur la surface de ces derniers. Pour l’étude de dégradation thermique des matériaux biosourcés, trois densités de flux de chaleur ont été utilisés notamment 20, 35 et 50 kW/m². L’étude paramétrique s’est focalisée sur l'indice de performance du feu, l'indice de croissance du feu, la perte de masse, le débit de pyrolyse, la température de surface de la face arrière et de la face avant de l’échantillon et les émissions gazeuses obtenues pour chaque configuration de tests.À l’aide des résultats, il est montré que pour la configuration caractérisée par la flamme la plus intense, le matériau composite carbone-PEKK est le plus stable thermiquement. De plus, pour les trois flux de chaleurs étudiés, les matériaux composites biosourcés présentent des comportement thermo-physiques différents. En effet, à moyenne échelle, les matériaux à base de fibres de lin présentent des propriétés thermiques supérieures à celles à de matériaux à base de fibres de banane. Cependant, à grande échelle, l’observation opposée a été mise en évidence. Il en ressort que les propriétés thermiques des matériaux biosourcés dépendent fortement de leur tailleWith the aim of improving the understanding of the fire behavior of synthetic and bio-sourced composite materials, the objective of this thesis is to highlight physicochemical phenomena related to fire safety for materials that can be used in applications of aeronautics and/or automobiles. In this context, part of the experimental tests was carried out using the NexGen burner developed according to FAA requirements to carry out fire certification tests. The second part of the results was obtained using a cone calorimeter to assess the fire behavior of composite materials on a medium scale. In addition to fire certification tests, this research study focused on the development of bio-sourced composite materials. Indeed, considering the non-biodegradable nature of synthetic composite materials such as carbon-PEKK, carbon-BMI, and carbon-phenolic, the lack of work dealing with the subject and the problem of global warming, this thesis proposes a physical characterization -chemical of bio-sourced composite materials subjected to different heat flow densities. The bio-sourced composite materials manufactured as part of this thesis consist of flax fibers and banana fibers; manufactured using the VARTM method. To improve the thermo-physical properties of these materials to increase their performance from a fire safety point of view, an additional layer of flame retardant was applied to their surface. For the study of the thermal degradation of bio-sourced materials, three heat flow densities were used, notably 20, 35, and 50 kW/m². The parametric study focused on the fire performance index, the fire growth index, the mass loss, the pyrolysis flow rate, the surface temperature of the rear face and the front face of the sample, and the gaseous emissions obtained for each test configuration. Using the results, it is shown that for the configuration characterized by the most intense flame, the carbon-PEKK composite material is the most thermally stable. In addition, for the three heat flows studied, the bio-sourced composite materials present different thermo-physical behavior. Indeed, on a medium scale, materials based on flax fibers have thermal properties superior to those of materials based on banana fibers. However, on a large scale, the opposite observation was highlighted. It appears that the thermal properties of bio-sourced materials strongly depend on their size
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Zine, Oussama. "Caractérisation thermique et acoustique des plaques isolantes à base de fibres végétales." Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1279.
Анотація:
La valorisation des déchets végétaux très abondants au Maroc offre un grand potentiel pour le développement d'une nouvelle filière des matériaux composites. Néanmoins, ce potentiel est encore peu exploité. Dans ce contexte, ce travail a été mené afin d'étudier les caractéristiques thermiques et acoustiques des plaques composites locales à base de fibres végétales. L'objectif est double: d'une part, proposer une solution alternative à la gestion des déchets au Maroc, et d'autre part améliorer les performances thermiques et acoustiques des parois.Plusieurs échantillons de matériaux composites à base de fibres végétales (copeaux de bois, sciure de bois, chènevotte broyée et fibrée) ont été élaborés, dans le but d'évaluer leurs caractéristiques thermiques et acoustiques.Du point de vue thermique, les résultats expérimentaux ont montré que la majorité des composites étudiés présentent des valeurs faibles de la conductivité et de la diffusivité thermiques. De plus, la variation de la masse volumique apparente a un effet considérable sur les propriétés thermiques des composites. En outre, les paramètres d'inertie thermique du mur extérieur sont influencés par les propriétés thermophysiques, l'épaisseur et l'emplacement de l'isolant dans le mur, ainsi que le coefficient d'échange global interne.Du point de vue acoustique, les échantillons présentent une capacité d'absorption acoustique significative, en particulier dans les hautes fréquences. Ils peuvent absorber plus de 50% de l'énergie sonore incidente dans une large gamme de fréquences. La masse volumique apparente et la taille des particules des composites influencent également l'absorption acoustique.En conclusion, les résultats obtenus fournissent une évaluation fiable et prometteuse des performances thermiques et acoustiques des matériaux d'isolation d'origine végétale. Le développement de cette filière contribuera au programme de développement de l'efficacité énergétique au Maroc et enrichira la base de données des matériaux d'isolation disponibles dans le paysThe valorization of plant waste, so abundant in Morocco, offers great potential for the development of a new sector of composite materials. Nevertheless, this potential remains under-exploited. In this context, this study was carried out to investigate the thermal and acoustical characteristics of local composite panels based on plant fibers. The aim is twofold: on the one hand, to offer an alternative solution to waste management in Morocco, and on the other hand, to improve the thermal and acoustic performance of walls.Several samples of composite materials based on plant fibers (wood chips, sawdust, crushed hemp shiv, and fibred hemp shiv) were developed to assess their thermal and acoustical characteristics.From a thermal point of view, the experimental results have shown that the majority of composites studied exhibit low values of the thermal conductivity and diffusivity. In addition, the variation in bulk density has a considerable effect on the thermal properties of the composites. In addition, the thermal inertia parameters of the exterior wall are influenced by the thermophysical properties, thickness, and position of the insulation in the wall, as well as the internal global heat exchange coefficient.From an acoustic point of view, the samples have a significant acoustic absorption capacity, particularly at high frequencies. They can absorb more than 50% of incident sound energy over a wide range of frequencies. Composite bulk density and particle size also influence acoustic absorption.In conclusion, the results obtained provide a reliable and promising assessment of the thermal and acoustic performance of plant-based insulation materials. The development of this sector will contribute to Morocco's energy efficiency development program and enrich the database of insulation materials available in the country
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Avramescu, Ana-Maria. "Approche de l'impact des matériaux bio-sourcés sur la qualité perçue des produits : cas de la fibre de lin." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2013. http://tel.archives-ouvertes.fr/tel-01001740.
Анотація:
Dans un contexte d'éco-conception, les efforts d'innovation amènent de nouveaux matériaux dits bio-sourcés qui participent à réduire l'impact des produits sur l'environnement. S'agissant de nouveaux matériaux, l'innovation porte également sur l'amélioration de la qualité perçue par le consommateur. Le challenge est donc de concevoir des produits respectueux de l'environnement à l'aide de nouveaux matériaux écologiques tout en garantissant une qualité perçue au moins identique à celle des matériaux synthétiques classiques. Le design sensoriel, par l'utilisation de l'évaluation sensorielle, est l'une des disciplines qui permet de prendre en compte le ressenti sensoriel des consommateurs. Cependant, dans la littérature, peu de travaux portent sur l'application des méthodes d'évaluation sensorielle à des matériaux bio-sourcés. Face à ce constat, nos travaux se proposent d'étudier la possibilité d'évaluer, avec des méthodes d'analyse sensorielle, un matériau bio-sourcé à base de fibres de lin de la même manière qu'un synthétique à base de fibres de verre. Plus précisément, nos travaux proposent une approche basée sur une évaluation sensorielle tactile et une évaluation instrumentale objective de la surface de ces deux matériaux. Nos résultats ont permis de valider l'application des méthodes d'évaluation sensorielle tactile sur un matériau bio-sourcé. Nos travaux ont permis la définition de profils sensoriels pour le toucher concernant le matériau à base de fibres de lin. Les résultats obtenus ont aussi permis de valider la possibilité de corréler certains indicateurs tactiles subjectifs avec des mesures instrumentales objectives. L'ensemble des connaissances développées dans le cadre de ces travaux offre aux concepteurs une aide précieuse dans le choix des matériaux bio-sourcés en éco-conception et plus généralement en conception de produits.
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Mattlet, Agnès. "Influence de l'utilisation d'une matrice recyclée sur le comportement et les performances d'un composite lin/polypropylène lors de sa mise en oeuvre et de son vieillissement hydrothermique." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2022. http://www.theses.fr/2022UBFCK079.
Анотація:
Afin de répondre à l'intérêt grandissant autour de l'écologie, le développement de matériaux éco-responsables est devenu prépondérant dans des domaines tels que les transports et la mobilité. Le remplacement des fibres synthétiques par des fibres naturelles et des polymères vierges par des recyclés sont des solutions potentiellement intéressantes. En effet, ces matériaux présentent des propriétés mécaniques spécifiques similaires et une empreinte environnementale plus faible. Néanmoins, les fibres naturelles présentent une forte hydrophilie, ce qui peut poser problème lors d'une utilisation à long terme en extérieur. Les polymères quant à eux subissent des modifications lors de leur recyclage qui peuvent affecter leur compatibilité avec les fibres. L'objectif de cette thèse est d'étudier comment l'utilisation d'une matrice recyclée influe sur les propriétés d'usage de composites polypropylène/lin et sur leur comportement lors de vieillissements hydrothermiques et cycliques. Dans un premier temps, l'influence des paramètres de mise en œuvre (pourcentage d'agent compatibilisant, temps, température et pression de consolidation, vitesse de refroidissement et température de sortie du moule) sur les propriétés mécaniques des composites à matrice vierge a été étudiée afin d'obtenir un matériau de référence. Ensuite, l'impact de l'utilisation de matrices recyclées sur les propriétés du composite a été étudiée. Enfin, des vieillissements hydrothermiques et cycliques (immersion, gel, séchage) ont été appliqués aux différents composites (matrices vierges et recyclées). Une analyse multi-échelle conjuguant caractérisations physico-chimiques, structurales et mécaniques a été réalisée au cours du vieillissement afin de mieux comprendre l'effet de matrices recyclées sur le comportement dans le temps des compositesTo respond to the growing interest in ecology, the development of eco-responsible materials has become preponderant in areas such as transportation and mobility. One potential solution is to replace synthetic fibers by natural ones and virgin polymers by recycled ones. Indeed, these materials present similar specific properties and a lesser environmental footprint. However, natural fibers are very hydrophilic, which can be a problem in long-term outdoor use. As for the polymers, they undergo modifications during recycling that can affect their compatibility with fibers. This thesis' aim is to investigate how the use of a recycled matrix affects the properties of polypropylene/flax composites and their behavior under hydrothermal and cyclic ageing. First, the influence of processing parameters (compatibilizing agent's percentage, consolidation time, temperature and pressure, cooling rate and exit temperature) on the mechanical properties of virgin matrix composites was studied in order to obtain a reference material. Then, the impact of the use of recycled matrices on the properties of the composite was studied. Finally, hydrothermal and cyclic ageing (immersion, freezing and drying) were applied to all composites (with virgin and recycled matrices). A multiscale analysis combining physicochemical, structural and mechanical characterizations was carried out during ageing to better understand the influence of the matrix on the behavior of the composites over time
Частини книг з теми "Bio-Sourced materials":
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Kaoutari, Taoufiq, Yousra Taouirte, Hasna Louahlia, Mohamed Boutouil, Steve Goodhew, and François Streif. "Hygrometric Characterization of New Bio Sourced Materials for Building Construction." In Lecture Notes in Mechanical Engineering, 438–46. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-43934-6_44.
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Soussi, Yamna, Houda Er-Retby, Hicham Mastouri, Abdelkader Outzourhit, Hassan Radoine, and Mohamed El Mankibi. "The Impact of Bio-Sourced Materials on the Building’s Energy Performance in a Semi-Arid Climate." In Sustainability in Energy and Buildings 2023, 213–24. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8501-2_20.
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Hamrouni, Anis, Jean-Luc Rebiere, Abderrahim El-Mahi, Moez Beyaoui, and Mohamed Haddar. "Tensile Properties and Damage Mechanisms of a 3D Printed Bio-Sourced Material with a Rectangular Shape." In Lecture Notes in Mechanical Engineering, 265–74. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-57324-8_29.
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Mizan, Md Mizanul Haque, Farah Rahman Omi, Hamadia Sultana, and Mohtada Sadrzadeh. "Bio-sourced and biodegradable materials for membrane fabrication." In Green Membrane Technologies towards Environmental Sustainability, 169–208. Elsevier, 2023. http://dx.doi.org/10.1016/b978-0-323-95165-4.00007-0.
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S, Pradeepa, Anitha J, and Ramya N. "ECO MATERIALS." In Futuristic Trends in Construction Materials & Civil Engineering Volume 3 Book 5, 161–70. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bjce5p2ch6.
Анотація:
The increasing global awareness of environmental issues has led to a growing demand for sustainable practices in various industries. One crucial aspect is the development and utilization of eco-friendly materials, which are designed to minimize the environmental impact of production, consumption, and disposal. This abstract provides an overview of the concept of eco-materials, highlighting their significance, characteristics, and potential applications. Eco-materials, also known as environmentally friendly materials or green materials, are those that are sourced, processed, and used in a way that has minimal negative effects on the environment. These materials aim to reduce resource depletion, energy consumption, and waste generation throughout their life cycle. Key characteristics of eco-materials include recyclability, biodegradability, low carbon footprint, and the use of renewable resources. The development of eco-materials involves a multidisciplinary approach, combining principles from materials science, chemistry, engineering, and environmental science. Researchers and industries are actively exploring innovative ways to replace conventional materials with eco-friendly alternatives in various applications such as construction, packaging, textiles, and electronics. Several types of eco-materials have emerged, including bio-based polymers, recycled materials, sustainable composites, and materials designed for disassembly. Bio-based polymers, derived from renewable resources like plants and bacteria, offer a biodegradable alternative to traditional petroleum-based plastics. Recycled materials, such as recycled metals, paper, and glass, contribute to reducing the demand for virgin resources. Sustainable composites combine materials like natural fibers with recycled polymers to create durable and environmentally friendly alternatives. In conclusion, the development and utilization of eco-materials represent a crucial step towards achieving a more sustainable and environmentally conscious future. As research continues to advance in this field, the integration of eco-friendly materials into mainstream industries will contribute to a more circular and regenerative economy, fostering a harmonious relationship between human activities and the natural environment.
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de la Cruz-Martínez, Felipe, José A. Castro-Osma, and Agustín Lara-Sánchez. "Catalytic synthesis of bio-sourced organic carbonates and sustainable hybrid materials from CO2." In Advances in Catalysis. Elsevier, 2022. http://dx.doi.org/10.1016/bs.acat.2022.07.003.
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Kerton, Francesca M. "Ocean Resources for the Production of Renewable Chemicals and Materials." In Chemical Processes for a Sustainable Future, 443–58. The Royal Society of Chemistry, 2014. http://dx.doi.org/10.1039/bk9781849739757-00443.
Анотація:
This chapter describes the use of ocean- or marine-sourced biomass for the production of renewable materials and chemicals. Algae and waste from the fisheries can be used to provide a range of chemicals including biopolymers (carbohydrates), pigments, proteins (and amino acids), lipids and minerals. This chapter highlights the use of algae to produce phycocolloids (carrageenans, agarose and alginates), waste crustacean shells to produce chitin, chitosan and related small molecules, and waste mollusc shells to produce biorenewable calcium carbonate. In many cases, green chemistry and engineering approaches are employed. Examples include the use of catalysts (both chemical and bio-catalysts) and the use of alternative solvents (water, supercritical fluids and ionic liquids). Furthermore, consideration of the overall sustainability of current fishing and aquaculture practices is encouraged and the use of by-products for adding commercial viability to this sector of the economy is outlined.
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Yılmaz, Betül Bay. "Perspectives of Biodegradable Nanocoatings in Food Packaging." In Sustainable Approach to Protective Nanocoatings, 113–69. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-3136-1.ch005.
Анотація:
Nanotechnology has the potential to improve human health, economic prosperity, product innovation, and overall quality of life, including through food nanopackaging––a promising area focusing on biodegradable packaging solutions. This alternative to conventional packaging minimizes waste, extends food shelf life, and enhances overall quality. The production of biodegradable nanocoatings can contribute to industry sustainability by reducing water consumption, solid waste, electricity use, and emissions. Bio-based coatings, with compatibility and matrix properties, can incorporate antioxidant agents and antimicrobial compounds, enhancing product safety, functionality, and shelf life. Biodegradable polymers, including polysaccharides, proteins, lipids, and polyesters, offer innovative pathways for entirely bio-based nanocoatings. These cost-effective, biocompatible, and renewable materials can be sourced directly from marine organisms and plants or produced through fermentative processes by microorganisms, such as microbial polyesters or polysaccharides. However, challenges in handling biopolymers, such as their hydrophilicity, crystallization tendencies, brittleness or melting instabilities, necessitate blending them with other materials to enhance their coating performance. Integrating nanoparticles within biopolymers can address environmental concerns by reducing packaging materials and enhancing recyclability. This approach aligns with a more eco-sustainable approach to food packaging, resulting in reduced waste.
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Lackner, Maximilian, David Drew, Valentina Bychkova, and Ildar Mustakhimov. "Value-Added Products from Natural Gas Using Fermentation Processes: Fermentation of Natural Gas as Valorization Route, Part 1." In Natural Gas - New Perspectives and Future Developments [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103813.
Анотація:
Methanotrophic bacteria can use methane as their only energy and carbon source, and they can be deployed to manufacture a broad range of value-added materials, from single cell protein (SCP) for feed and food applications over biopolymers such as polyhydroxybutyrate (PHB) to value-added building blocks and chemicals. SCP can replace fish meal and soy for fish (aquacultures), chicken and other feed applications, and also become a replacement of meat after suitable treatment, as a sustainable alternative protein. Polyhydroxyalkanoates (PHA) like PHB are a possible alternative to fossil-based thermoplastics. With ongoing and increasing pressure towards decarbonization in many industries, one can assume that natural gas consumption for combustion will decline. Methanotrophic upgrading of natural gas to valuable products is poised to become a very attractive option for owners of natural gas resources, regardless of whether they are connected to the gas grids. If all required protein, (bio)plastics and chemicals were made from natural gas, only 7, 12, 16–32%, and in total only 35–51%, respectively, of the annual production volume would be required. Also, that volume of methane could be sourced from renewable resources. Scalability will be the decisive factor in the circular and biobased economy transition, and it is methanotrophic fermentation that can close that gap.
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"Green Fab Lab." In European Perspectives on Learning Communities and Opportunities in the Maker Movement, 1–26. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8307-3.ch001.
Анотація:
Green Fab Lab is nestled in the Catalonian area of Eastern Spain in the mountains surrounding the metropolis of Barcelona. Located on what once was a vacation and hunting ground for Spanish royalty, the Valldaura Estate, which houses the Green Fab Lab, sits on 130 hectares of forest. The site is part of a movement to be self-sufficient and sustainable, using locally sourced material. The current space is one of many Fab Labs in Barcelona and is part of the IAAC (Institute for Advanced Architecture of Catalonia), which is a world-renowned school of modern architecture. The space is about 2152 ft2 (200 m2), with a full complement of Fab Lab equipment and machines as well as a small bio space. Within the space, learning communities are often developed through the communication of students in the Fab Academy, Bio Academy, or Zero courses and local gurus in the space or in the community. This chapter explores the Green Fab Lab.
Тези доповідей конференцій з теми "Bio-Sourced materials":
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Ghorbel, Elhem, and Mariem Limaiem. "Efficiency of Bio-Sourced Composites in Confining Recycled Aggregates Concrete." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.505.
Анотація:
This research investigates the efficiency of using Flax Fibers reinforced bio-sourced polymer by comparison to traditional system based on Carbone Fiber Reinforced Epoxy Polymer in order to confine recycled aggregates concrete. Four concrete formulations have been formulated by incorporating recycled aggregates from demolition waste (0%, 30%, 50% and 100%). An air-entraining agent was added to the formulations to achieve the level of 4% occluded air. The main objective is to discuss and to evaluate the effectiveness of confining them using bio-sourced composite by comparison to traditional ones. To hit this target, the developed approaches are both experimental and analytical. The first part is experimental and aimed to characterize the mechanical behavior of the materials: the composites used in the confining process the unconfined concrete (effect of incorporating recycled aggregates on the overall mechanical characteristics). We establish that bio-sourced composites are efficient in strengthening recycled aggregates concrete especially if they are air-entrained. The second part of this work is dedicated to analytical modeling of mechanical behavior of confined concrete with composite under compression based on Mander’s model. The input parameters of the model were modified to consider the rate of recycled aggregates incorporation. Comparison between experimental results and the modified Mandel’s Model is satisfactory.
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Xavier, Pascal, and Tan-Phu Vuong. "RF printed electronic devices using bio-sourced materials: risks and opportunities." In 2022 IEEE Latin American Electron Devices Conference (LAEDC). IEEE, 2022. http://dx.doi.org/10.1109/laedc54796.2022.9908189.
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Becker, Edward. "[Local] Materials Matter." In 2020 ACSA Fall Conference. ACSA Press, 2020. http://dx.doi.org/10.35483/acsa.aia.fallintercarbon.20.25.
Анотація:
This research explores three design-research projects led by the author that transformed locally sourced, underutilized biomaterials into high-performance building products tailored to their regional contexts. They are intended to expose barriers related to product development, permitting, code compliance, and application, each key limitations for the widespread acceptance and utilization of novel low-carbon construction materials. One case-study project, the New River Train Observation Tower, involved the utilization of low-grade timber products for the development of local-species CLT. The low-grade “trash” wood for the structural product was sourced, milled, pressed, and utilized locally, thus significantly reducing carbon emissions from construction, benefitting the local economy, and resisting region-specific pests/fungi. The thirty-foot-tall, publicly accessible tower was the first hardwood CLT building in the United States to receive a building permit and to be constructed with local- species wood. Another practice-based research project by the author titled “Lake House” employs local alternatives for non-renewable building products. The project involves the utilization of thermally modified wood and highlights key hurdles to locally sourced, bio-based material utilization. Each project exemplifies a material-based carbon management strategy and is affiliated with the author’s research at the Center for Low-Carbon Structures and Systems at Virginia Tech, a multidisciplinary research unit focused on the development and implementation of novel bio-based building systems. Both case study projects and their related low-carbon products/systems align with the AIA Framework for Design Excellence, specifically Designing for Resources and Designing for Economy.
4
Kinaci, Emre, John Chea, Kirti Yenkie, and Kylie Howard. "Converting Birch Bark Extracts into Bio-based Thermosets." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/wcih1760.
Анотація:
Birch tree barks are regarded as waste in the pulp and papermaking industry and used as fuel. However, this material presents a source that contains many bio-based chemicals suitable for applications ranging from pharmaceuticals, plastics and composites, coatings, and antifeedants. Among the mixture of bio-derived chemicals in birch barks, triterpenoids, such as betulin, betulinic acid, and lupeol, can be present up to 30% weight of dry bark mass. They are highly valued for their anti-tumor, HIV, and inflammatory responses. In our presented work, triterpenoid mixtures were extracted through a Soxhlet extractor using the barks from locally sourced river birch trees (Betula nigra) with an average yield of 10.6% (dry bark mass). The extracted materials were characterized using the Nuclear Magnetic Resonance (NMR), Advanced Polymer Chromatography (APC), High-Performance Liquid Chromatography (HPLC), and hydroxyl number titration to assess the identity, average molecular weight, triterpenoid content, and the number of reactive sites, respectively. The extracts have been used to synthesize bio-based polymers with promising thermal and mechanical properties using minimal processing steps. Birch bark extract naturally contains many potential reactive sites and thus making it advantageous for synthesizing polymers without requiring multiple purification steps. We demonstrate the potentials for increasing the utility of birch bark, contributing to sustainability challenges in materials science and engineering.
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B S, Dakshayini, Kishore Babu Kancherla, Benjamin Raju, and Debiprosad Roy Mahapatra. "Assessing the Structural Feasibility and Recyclability of Flax/PLA Bio-Composites for Enhanced Sustainability." In AeroCON 2024. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-26-0407.
Анотація:
<div class="section abstract"><div class="htmlview paragraph">Bio-composites have gained significant attention within the aerospace industry due to their potential as a sustainable solution that addresses the demand for lightweight materials with reduced environmental impact. These materials blend natural fibers sourced from renewable origins, such as plant-based fibers, with polymer matrices to fabricate composite materials that exhibit desirable mechanical properties and environmental friendliness. The aerospace sector's growing interest in bio-composites originates from those composites’ capacity to mitigate the industry's carbon footprint and decrease dependence on finite resources.</div><div class="htmlview paragraph">This study aims to investigate the suitability of utilizing plant-derived flax fabric/PLA (polylactic acid) matrix-based bio-composites in aerospace applications, as well as the recyclability potential of these composites in the circular manufacturing economy. The bio-composite laminate is produced through a compression molding process involving interleaved layers of PLA and flax fiber mats. We discuss the manufacturing technique, mechanical behavior, thermal characteristics properties of the bio-composite. A thorough comparison is drawn between these properties and those of similar bio-composites. Moreover, the study emphasizes the recycling of these bio-composites using mechanical milling, and their subsequent use as additives in the original fiber mat laminated composites. A comprehensive evaluation is conducted, contrasting the attributes of the original laminate with those of the laminate containing recycled additives.</div><div class="htmlview paragraph">The outcomes of this study will contribute to understanding and assessing the sustainability of bio-based polymer applications. By examining the performance of flax/PLA bio-composites in aerospace composite material qualification settings and investigating their recyclability, this research reveals the viability as an eco-friendly alternative in the aerospace industry, aligning with the industry's ongoing efforts to adopt greener practices and materials.</div></div>
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Ozolina, Sintija, Uldis Zaimis, and Andrejs Kukuskins. "Development and application of biodegradable wheat straw and carrageenan composite in agriculture." In 23rd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies, 2024. http://dx.doi.org/10.22616/erdev.2024.23.tf171.
Анотація:
Environmental concerns in the long run have led the public to develop alternative materials that could be used in agriculture. The development and application of carrageenan and wheat straw biodegradable composite in agriculture is the main focus of this study. This composite is crafted to tackle the environmental repercussions linked with traditional agricultural materials. The manufacturing procedure encompasses the extraction and treatment of wheat straw fibres, which are then merged with carrageenan, a naturally occurring polysaccharide sourced from red seaweed Furcellaria Lumbricalis. The resultant bio composite displays encouraging mechanical traits, rendering it suitable for a variety of agricultural applications. The employment of wheat straw not only offers an environmentally conscious substitute but also addresses the predicament of disposing of agricultural waste. Regarding its application, the biodegradable composite can serve as a material for seedling trays. Due to the composite natural propensity to break down over time, long-term environmental pollution is prevented. Additionally, the material biodegradability is improved by its contact with soil microbes, enhancing the overall sustainability of agricultural methods. The outcomes of this study underscore the potential of the biodegradable wheat straw and carrageenan composite as a sustainable substitute for diverse agricultural applications. The development and assimilation of such environmentally friendly materials contribute to the ongoing endeavours to promote sustainable practices in agriculture, addressing both ecological apprehensions and the necessity for pioneering solutions in the field.
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Kremensas, Arūnas, Agnė Kairytė Kairytė, Saulius Vaitkus, Sigitas Vėjelis, Giedrius Balčiūnas, Anna Strąkowska, and Sylwia Członka. "Mechanical performance of biodegradable hemp shivs and corn starch-based biocomposite boards." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.132.
Анотація:
For the production of traditional building materials, excavated natural resources are used. The production process of such materials requires high-energy demands, wherefore, high amounts of CO2 gases, which have a great impact on climate change, are emitted. Only a small part of such materials is effectively recycled and reused. Generally, they are transported to landfills, which rapidly expand and may pollute the soil, groundwater and air. Currently, a great attention is paid to the production of novel building materials. The aim is to use as less excavated materials as possible and replace them by natural renewable resources. Therefore, the recycling and utilisation at the end of life cycle of such materials would be easier and generation of waste would reduce. This way, the efforts of switching to circular economy are being put. One of the approaches – wider application of vegetable-based raw materials (cultivated and uncultivated agricultural plants). The usage of fibre hemp shives (HS) as an aggregate and corn stach (CS) as a binding material allows development of biocomposite boards (WPCs) which could contribute to the solution of the before mentioned problems. Bio-sourced materials combined with a polymer matrix offer an interesting alternative to traditional building materials. To contribute to their wider acceptance and application, an investigation into the use of wood-polymer composite boards is presented. In this study, biocomposite boards for the building industry are reported. WPCa are fabricated using a dry incorporation method of corn starch and HS treatment with water at 100 °C. The amount of CS and the size of the HS fraction are evaluated by means of compressive, bending and tensile strength, as well as microstructure. The results show that the rational amount of CS, independently on HS fraction, is 10 wt.%. The obtained WPCs have compressive stress at 10% of deformation in the range of (2.4–3.0) MPa, bending of (4.4–6.3) MPa and tensile strength of (0.23– 0.45) MPa. Additionally, the microstructural analysis shows that 10 wt.% of CS forms a sufficient amount of contact zones that strengthen the final product. The obtained average density (~319–408 kg/m3) indicate that, according to European normative document EN 316, WPCs can be classified as softboards and used as self-bearing structural material for building industry. Based on the requirements, WPCs can be applied in dry and humid conditions for the internal and external uses without loading (EN 622-4, section 4.2) or as load-bearing boards in dry and humid conditions for instantaneous or short-term load duration (EN 622-4, section 4.3).
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CLOËZ, Liam. "Machinability of PLA obtained by injection molding under a dry milling process." In Material Forming. Materials Research Forum LLC, 2024. http://dx.doi.org/10.21741/9781644903131-208.
Анотація:
Abstract. This paper is part of a study focusing on the elaboration of accurate component with complex geometries using bio-sourced as an alternative to petrochemical polymer. The bio-sourced and biodegradable in this study is composed of a Poly Lactic Acid (PLA) matrix and hemp fibers. The final component is obtained by injection followed by a machining operation. the final component is obtained by injection followed by a machining finishing operation. Injection molding will be carried out to be compared with 3D printing on economic, environmental, production and workpiece quality criteria. This paper focuses only on the combination of two processes, injection molding followed by machining on poly (L-lactic acid) or PLLA which is biobased and biodegradable. After injecting the workpiece, thermo-physical characterization tests are realized on PLLA polymer. Rheology, thermal and mechanical tests are carried out in order to study thermomechanical behavior and to understand material flow phenomena at different temperatures and shear rates. The objective of this paper is to overcome the technical challenges of milling this material without any lubricant. In an upcoming project, various machining operations will be carried out such as turning to study continuous cutting, or milling to study discontinuous cutting on workpieces reinforced with bio-sourced fibers as hemp.
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Kaci, Lila, Sébastien Briot, Clément Boudaud, and Philippe Martinet. "RobEcolo: Optimal Design of a Wooden Five-Bar Mechanism." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85218.
Анотація:
Eco-design of robots has almost never be en explored in the past. This work investigates the potential of using bio-sourced materials, which have almost no environmental impact, instead of metals for robot design. Also, wood is one of the best candidates because of its interesting mechanical properties. However, wood performance / dimensions vary with the atmospheric conditions / external solicitations. Thus, it is challenging to design a stiff and accurate wooden industrial robot. Therefore, the objective of this paper is to describe a new design methodology leading to the design a wooden five-bar mechanism reliable in terms of accuracy and stiffness. The design optimization problem is solved in cascade. The first optimization process proposes to use a control-based design approach in order to compute the optimal primary geometric parameters of the robot (lengths of the links). This approach takes into account the sensor-based controller performance during the design phase. The second optimization process deals with the issue of the variability of the wood mechanical performance. It is based on a reliable topology optimization approach and allows for finding the shape of the robot links for which the impact of this variability in terms of deformation is minimized. Theoretical developments are described, solved and the obtained results allowed the prototyping of an industrial wooden five-bar mechanism.
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Farina, Stefania. "Proposals for the sustainable recovery of dry stone buildings in Puglia, Italy." In HERITAGE2022 International Conference on Vernacular Heritage: Culture, People and Sustainability. Valencia: Universitat Politècnica de València, 2022. http://dx.doi.org/10.4995/heritage2022.2022.15638.
Анотація:
Rural architecture in Puglia (south of Italy) is characterized by the mutual relationship between buildings and environment, typical of the spontaneous architecture of the Mediterranean basin. In fact, traditional rural buildings are an example of sustainable development, and their construction features respond to three fundamental issues: climate, building materials and morphology of the territory. Currently, the state of abandonment of the rural areas and the lack of awareness of their heritage have brought about irreparable degradation, followed by interventions incompatible with the identity of the territory. Through the conservation and recovery of sociocultural and environmental identity and the protection of biodiversity, the Puglia Region aims to protect and enhance the architectural and landscape heritage in a sustainable way with the implementation of a regional landscape plan. This study focuses on the small town of Ostuni (Brindisi), in the Apulian area of Murgia dei Trulli, known for its typical dry stone constructions. The different architectural typologies are examined and described, listing the intrinsic bioclimatic peculiarities of their components and specifying the different bioecological actions suitable for any kind of intervention: restoration, recovery, reuse, or even ordinary and extraordinary maintenance. The aim of the project is to develop guidelines for the sustainable recovery of different types of rural buildings in order to suggest minimally invasive technological systems, oriented to the use of renewable energy sources and the maintenance of traditional elements. The proposals aims to respect green building principles, using locally sourced bio-sustainable materials and finishes belonging to the local construction tradition. But also, merging traditional construction techniques with modern technologies and following the principle of "minimum impact" on the existing constructions.