La thèse vise à identifier, développer et tester des matériaux isolants à partir de déchets textiles, le rôle de l'isolation thermique des tuyaux. Visant à accroître la performance énergétique de chauffage et avec un impact environnemental réduit. Etude théorique était d'identifier les propriétés matériau d'isolation thermique, la classification sur le marché utilisé dans l'isolation thermique des méthodes de test national et international. Pour tester les propriétes thermiques ont été menées deux installations de laboratoire. Dans un premier temps l'installation, afin de déterminer la conductivité thermique, le flux thermique de la chaleur est produite par une résistance électrique. Ont été réalisés et testés structurellement différents des matériaux de densité (coton, la laine et le tissu non tissé) de la température maximale de 90C dans la canalisation. Le rôle de ces essais était de déterminer la densité et le comportement optimal à des températures différentes. Une deuxième installation est effectuée sur un cas réel (une tuyauterie isolée thermique avec a) la flux thermique de la chaleur est générée par le fluide (de l'eau). Un conducteur testé dans trois situations : tuyaux non isolés, tuyau isolé et le tuyau PUR isolé non tissé. Tous les tests étaient en faveur de la non tissé. L'analyse statistique a montré que la température et la densité sont des facteurs importants qui influent sur la conductibilité thermique des tissus. / The thesis aims at identifying, developing and testing of insulation materials from waste textiles, the role in thermal insulation of pipes. Aiming at increasing the energy performance of heating and with a reduced environmental impact. Theoretical study was to identify thermal insulating material properties, classification on the market used in thermal insulation of national and international and the testing methods. To test the thermal properties were conducted two laboratory facilities. At first installation, to determine the thermal conductivity, the thermal flow of heat flux is generated by electrical resistance. Were made and tested structurally different density materials (cotton, wool and non-woven fabric) with maximum temperature of 90C in the pipeline. The role of these tests was to identify the optimum density and behavior at different temperatures. A second installation is performed on a real case (an installation with a thermal insulated pipe) the thermal flow of heat is generated by the fluid (water). A conductive tested in three situations: non-insulated pipes, insulated pipe and pipe PUR insulated non-woven fabric. All tests were in favor of non-woven fabric. The statistical analysis showed that the temperature and density are significant factors that influence the thermal conductivity of fabrics.

West Africa’s textile and clothing (T&C) industries have persevered through the decline following the economic liberalization policies in the 1980s. This thesis seeks to explore the sustainable and circular business models which exist in the West African region. It also explores the ways that businesses relate to the social conditions of poverty, a small T&C industry, strong competition from imports, and the concentrated levels of imported textile waste. Through a qualitative methodology, secondary data is collected on thirty T&C businesses in West Africa. These businesses are analyzed through the framework of the eleven sustainable business model (SBM) pattern groups by Lüdeke-Freund, et al. (2018). In the results, five main SBM pattern groups emerge: Supply Chain, Social Mission, Closing-the-Loop, Eco-design, and Cooperative pattern groups. Most of the businesses do not fall neatly into one pattern, but rather embody various hybrid sustainable business models. West Africa is unusual in facing both high poverty rates and textile waste landfills, which may influence the multi-dimensional approach to sustainability. By working with the local textile value chain and artisan communities, the thirty businesses contribute to poverty alleviation. They also pave the way for ‘artisan futurism,’ where handicraft is combined with circularity and eco-design initiatives, leading the West African T&C industry into the future.