35 documents found, page 1 of 4
Early-stage enzymatic treatments of scutched hemp fiber: impact on fiber proper...
Costa, Rita V.; Ferreira, Sílvia; Leite, Liliana; Araújo, Joana Carolina Carvalho; Ferreira, Diana P.; Bessa, João; Cunha, Fernando Eduardo MacedoAlthough hemp fibers are widely recognized for their sustainability benefits, their intrinsic stiffness and significant structural heterogeneity present processing challenges that limit their applicability in textile manufacturing, particularly in high-quality spinning systems such as flax wet spinning. To overcome these limitations, this study investigates early-stage enzymatic treatments of scutched hemp fibe...
Sustainable dyeing and functionalization of knitted cotton fabrics with algae e...
Oliveira, Helena S.; Santos, Joana; Ferreira, Tânia; Ribeiro, Artur; Silva, C.; Antunes, Joana C.; Bessa, João; Oliveira, Luís Miguel; Fangueiro, RaúlAlgae extracts have emerged as a sustainable and eco-friendly alternative to synthetic dyes and functional additives in the textile industry, particularly for dyeing and functionalizing of cotton fabrics. Herein, two types of water-soluble algae extracts from Arthrospira platensis and Porphyridium cruentum were characterized in terms of thermal, structural, and functional properties and used as dye and/or funct...
Functionalization of 3D-printed gyroid structures with active agents for enhanc...
Pinto, Ângela; Moreira, Maria João; Gonçalves, Afonso; Rua, Ricardo F.; Arruda, Luisa Mendes; Gomes, Fernanda; Antunes, Joana; Bessa, JoãoThe textile industry is a major consumer of water, contributing significantly to global water pollution due to the discharge of untreated wastewater containing dyes and chemicals. Consequently, water contamination in this sector is a pressing issue that demands immediate attention. Hence, the present studies alternative filtration solutions using strategically designed gyroid structures for Plate and Frame filt...
Adaptation and Validation of Ethics in Health Care Questionnaire Version 2 (EHC...
C. Moreira, Filipa; Leão, Cecília; Bessa, João; M. Teixeira, PedroIntroduction: Even though ethical decision-making is a cornerstone of medical practice there is a lack of validated tools to assess ethical sensitivity among medical students, junior, and senior doctors. The aim of this study was to adapt and validate the Ethics in Health Care Questionnaire – Version 2 (EHCQ-2) for use in Portugal, ensuring its relevance in evaluating ethical sensitivity within the Portuguese h...
Vision inspection design for systematic production of needle beds: an industria...
Freitas, Luis; Malheiro, M. Teresa; Gonçalves, A. Manuela; Vicente, José; Pereira, Filipe; Morais, Francisco; Bessa, João; Machado, JoséThe increasingly standards of the electronic industry, especially in Printed Circuit Boards, make In-Circuit-Test Machines one of the most important systems on the production lines. With this, the pressure on the In-Circuit-Test Machines production to meet this strict requirements it is getting bigger every day. To react to this pressure it is necessary to update, in a technological point of view, the manufactu...
Upcycling fishing net waste and metal oxide from electroplating waste into alga...
Barros, Daniel; Nobre, Luís; Antunes, Joana; Bessa, João; Cunha, Fernando Eduardo Macedo; Mota, Carlos; Gomes, Fernanda Isabel AntunesPlastic waste, especially discarded fishing nets, and electroplating sludges pose significant environmental challenges, impacting marine ecosystems and contributing to pollution. In alga cultivation, invasive microorganisms often hinder growth, necessitating strategies to combat these issues. This study aimed to develop recycled substrates for alga cultivation by repurposing fishing nets and enhancing their sur...
Halochromic textiles for real-time sensing of hazardous chemicals and personal ...
Leite, Liliana; Pais, Vânia Nascimento; Silva, Cristina; Boticas, Inês Martins; Bessa, João; Cunha, Fernando; Relvas, Cátia; Ferreira, NoelChemical protective clothing (CPC) has become mandatory when performing various tasks to ensure user protection and prevent chemicals from contacting the skin and causing severe injuries. In addition to protection, there is a need to develop a simple mechanism that can be attached to CPC and be capable of detecting and alerting the user to the presence of harmful chemical agents. In this study, a double-sensor ...
Blast fragment impact of angle-ply composite structures for buildings wall prot...
Barros, Daniel; Mota, Carlos; Bessa, João; Cunha, Fernando Eduardo Macedo; Rosa, Pedro; Fangueiro, RaúlThis paper investigates the fragment performance of several composite panels for attaching to the inside walls of a building structure. These panels were developed using different types of fiber woven fabrics (W0, W90) combined with distinct layers orientations (angle-ply effect) of L0/0 and L0/15. Aramid, E-glass, and S-glass fiber fabrics impregnated with thermosetting epoxy resin, and a prepreg of Ultra High...
Development of smart clothing to prevent pressure injuries in bedridden persons...
Rêgo, Anderson da Silva; Furtado, Guilherme Eustáquio; Bernardes, Rafael A.; Santos-Costa, Paulo; Dias, Rosana A.; Alves, Filipe S.; Ainla, AlarPressure injuries (PIs) are a major public health problem and can be used as quality-of-care indicators. An incipient development in the field of medical devices takes the form of Smart Health Textiles, which can possess innovative properties such as thermoregulation, sensing, and antibacterial control. This protocol aims to describe the process for the development of a new type of smart clothing for individual...
Comparison of zinc oxide nanoparticle integration into non-woven fabrics using ...
Ferreira, Tânia; Vale, Ana Catarina; Pinto, Alexandra C.; Costa, Rita V.; Pais, Vânia; Sousa, Diana; Gomes, Fernanda Isabel Antunes; Pinto, GraçaThe development of advanced facemasks stands out as a paramount priority in enhancing healthcare preparedness. In this work, different polypropylene non-woven fabrics (NWF) were characterised regarding their structural, physicochemical and comfort-related properties. The selected NWF for the intermediate layer was functionalised with zinc oxide nanoparticles (ZnO NPs) 0.3 and 1.2wt% using three different method...