96 documents found, page 1 of 10
Elastic bands antimicrobial functionalization
Ferreira, Ana Francisca; Fernandes, Rui Daniel Vilaça; Vieira, Bárbara Marques; Peixoto, Joaquim Jorge Gomes; Felgueiras, Helena Prado; Zille, AndreaSustainability of textile products encompasses the extension of their useful life period during which they adequately serve their intended purpose. Antimicrobial finishings can prevent microbial damage and extend textile lifespan. Even though the functionalization and characterization processes have been thoroughly described for woven, knitted and non-woven textiles, there is a lack of information regarding ela...
Colourful protection: Challenges and perspectives of antibacterial pigments ext...
Gomes, Micaela; Felgueiras, Helena Prado; Leite, Barbara R.; Soares, Graça M. B.Bacterial pigments have gained significant attention across multiple industries due to their natural hues and unique functional properties. Beyond coloration, some of these pigments exhibit antibacterial activity, making them particularly valuable in the textile industry as sustainable alternatives to synthetic antimicrobial treatments. Bacteria produce a vast array of pigments through diverse biosynthetic path...
Coaxial fibres incorporated with phase change materials for thermoregulation ap...
Hammes, Nathalia; Pinheiro, Claver Giovanni Silveira; Rocha Segundo, Iran Gomes da; Homem, Natália Cândido; Silva, Maria ManuelaNowadays, the growing concern about improving thermal comfort in different structures (textiles, buildings, and pavements, among others) has stimulated research into phase change materials (PCMs). The direct incorporation of PCMs into composite materials can cause mechanical impacts. Therefore, this study focuses on the design of phase change coaxial fibres (PCFs), using commercial cellulose acetate (CA) or rec...
Removal of textile dye reactive blue 49 from wastewater and dye baths by membra...
Krupková, Olga; Dušek, Libor; Cuhorka, Jiří; Soares, Graça M. B.; Kuchtová, Gabriela; Mikulášek, Petr; Bendová, HelenaThe paper is focused on testing the two-phase treatment of wastewater from dyehouses and the production of aminoanthraquinone dyes using membrane separation and a subsequent advanced oxidation process with an efficiency >99.99 %. Commercial nanofiltration membranes AFC 30 and AFC 40 were used for the separation of Reactive Blue 49 dye. The effect of pressure difference, injection concentration, permeate flow in...
Evaluation of the mechanical properties of asphalt mixtures modified with coaxi...
Pinheiro, Claver Giovanni Silveira; Hammes, Nathalia; Homem, Natália Cândido; Rocha Segundo, Iran Gomes da; Felgueiras, Helena PradoThis paper presents a mechanical approach to assess the feasibility of utilising Phase Change Material (PCM) embedded within coaxial fibres for mitigating Urban Heat Island effects in asphalt concrete (AC). The fibres, made via wet spinning, consist of a polyethene glycol core surrounded by a cellulose acetate sheath. Using the Response Surface Method (RSM) and the Design of Experiments (DoE), the study investi...
Development of core-sheath phase change fibres incorporated with PEG2000 for th...
Hammes, Nathalia; Monteiro, José; Pinheiro, Claver Giovanni Silveira; Rocha Segundo, Iran Gomes da; Homem, Natália; Silva, M. Manuela P.The resilience of urban infrastructures in the face of climate challenges has become a public concern, with direct impacts on the well-being of citizens due to frequent environmental, economic and social influences. Asphalt pavements, widely present in urban centres, contribute negatively to the Urban Heat Islands (UHI) effect, which is responsible for slowly absorbing and releasing heat due to their dark surfa...
Exploring the cutting process of coaxial phase change fibers under optical char...
Hammes, Nathalia; Monteiro, José; Pinheiro, Claver Giovanni Silveira; Felgueiras, Helena Prado; Soares, Graça M. B.; Rocha Segundo, Iran Gomes daUrban heat islands (UHI) are a growing issue due to urbanization, causing citizens to suffer from the inadequate thermal properties of building materials. Therefore, the need for climateresistant infrastructure is crucial for quality of life. Phase change materials (PCMs) offer a solution by being incorporated into construction materials for thermoregulation. PCMs store and release heat as latent heat, adjustin...
Desenvolvimento de fibras de mudança de fase para regulação térmica
Hammes, Nathalia; Pinheiro, Claver Giovanni Silveira; Monteiro, José; Rocha Segundo, Iran Gomes da; Homem, Natália Cândido; Silva, M. Manuela P.O aquecimento global impõe o desenvolvimento de novos materiais e estratégias de regulação térmica. Materiais de mudança de fase (PCM) são capazes de absorver e libertar energia térmica num processo de fácil controlo. Estes materiais podem ser incorporados em fibras facilitando a sua aplicação, por exemplo em pavimentos asfálticos, absorvendo calor durante o dia e libertando-o durante a noite reduzindo, assim, ...
Enhancing mosquito repellency in textiles through optimized natural essential o...
Abreu, Maria José; Martins, Etienne; Soares, Graça M. B.; Alves, Leucio; Silva, AngelaAn optimized formulation combining Mentha piperita and citronella essential oils showed excellent mosquito repellency in textiles. The concentration and method of application were crucial factors. Essential oils offer a safe and sustainable alternative to synthetic repellents in textile products. This formulation has the potential to decrease the spread of mosquito-borne diseases. The study highlights the possi...
Development of coaxial fibers loaded with polyethylene glycol 2000 for thermore...
Hammes, Nathalia; Pinheiro, Claver Giovanni Silveira; Rocha Segundo, Iran Gomes da; Homem, Natália Cândido; Felgueiras, Helena Prado[Excerto] Nowadays, there is a growing concern with thermoregulation to improve thermal comfort of buildings, asphalt pavements, and textiles, which directly affects social environmental, and economic issues. The development of coaxial polymeric fibers for these applications presents a considerable challenge, particularly when considering the incorporation of Phase Change Materials (PCM) into their core.