Rozdziały

Stały URI dla kolekcjihttp://hdl.handle.net/11652/4411

Przeglądaj

Filtry

20223

Ustawienia

Ma przypisane plikisearch.filters.applied.operator.equals: TakTematsearch.filters.applied.operator.equals: search.filters.subject.functionalization

collection.search.results.head

Teraz wyświetlane 1 - 3 z 3
  • Pozycja
    Development of integrated in-Situ actuator networks for the realization of flexure hinges for highly deformable fiber-reinforced plastic composites
    (Wydawnictwo Politechniki Łódzkiej, 2022) Bollengier, Quentin; Rabe, David; Mersch, Johannes; Häntzsche, Eric; Nocke, Andreas; Cherif, Chokri
    In the course of promoting e-mobility, there is currently a high demand for functionalized fiberreinforced plastics (FRPs). In particular, adaptive FRPs with structurally integrated actuators have a high innovation potential, since conventional motion mechanisms are usually based on external kinematics with high energy consumption. Even though actuators based on shape memory alloy (SMA) can be easily processed by mean of textile techniques, only few studies use the weft-knitting technology for the realization of adaptive FRPs with integrated actuator networks. This study aims at the development of functionalized weft-knitted fabrics with integrated in-situ actuator networks for the realization of adaptive FRPs. Therefore, functionalized reinforcement fabrics with integrated SMA actuators were developed and produced by weft knitting. The production of the composite infused by means of a thermosetting resin system. Afterward, the functional properties of adaptive FRPs were characterized and evaluated. In summary, this study highlights the suitability of the weft-knitting technology for the integral manufacturing of functionalized reinforcement fabrics with integrated in-situ actuator networks for the realization of adaptive FRP composites.
  • Pozycja
    Wool finishing for washable worsted man’s jacket
    (Wydawnictwo Politechniki Łódzkiej, 2022) Rhouma, Amira Belhaj; Campagne, Christine; Behary, N. Massika; François, Sébastien; Lanceron, Charles; Vieillard, Julien
    The aim of this study is to functionalize a 100% worsted wool fabric for use as washable suit jackets in a household washing machine (Samsung) with the wool/delicate cycle. In fact, it is highly recommended to wash worsted suit jackets by dry cleaning in order to avoid garment shrinkage when washing. Wool is known for its shrinking properties which make it difficult to wash with water. Varying chemical finishing were applied on woven worsted fabric. The aim of this finishing was to avoid both, felting shrinkage caused by the entanglement of fibres and fabric shrinkage due to fibre release strains and stresses introduced during processing, and hence improve its dimensional stability during domestic washing. A men jacket stitched with the chemically treated fabric was worn 5 times a week before being subjected to washing. Overall, 5 domestic washing were performed. And the fabric was analysed before and after the washings. Excellent dimensional stability was obtained without any sign of physical degradation as observed by SEM. This could be explained by the good adhesion of the fibre finish coating which resist to strains of wash and wear. Physical and chemical analysis using Zeta potential measurement would suggest that padding with a mixture of polycation (polyurethane based resin) and poly anion (polysiloxane-based resin) will help improving coating adhesion and hence its resistance to wash and wear.
  • Pozycja
    Technological design of jacquard fabric and their functionalization
    (Wydawnictwo Politechniki Łódzkiej, 2022) Kostajnšek, Klara; Bajrič, Špela; Bizjak, Matejka
    Functionalization of fabrics allows us to influence the physical-mechanical properties by using special yarns that improve fabric's properties, such as elasticity [1,2], thermal regulation [3,4], protection against ultraviolet (UV) rays [5–7], etc. In addition, from a design point of view, the shape and size of the pattern, its frequency and area distribution are also important, not only as a visual effect, but also in terms of the above-mentioned properties [8–10]. The aim of the study was to determine how different weft yarns, the size of the pattern and weave affect the final properties of the jacquard fabric. Six jacquard fabrics were woven on the same warp with two different weft yarns (cotton, Lyocell Clima) in two different patterns and two groups of double twill weaves (stiched and unstiched). The results show that fabrics made of cotton have poorer mechanical properties and lower permeability than fabrics with Lyocell Clima weft. Double unstitched fabrics generally have poorer mechanical properties and UV protection factors (UPF), but better air permeability values. A statistically significant influence of the raw material was shown for thickness, mass, thermal conductivity, tensile strength and, in the case of the size pattern and weave, for air permeability, breaking and tear strength.