Przeglądaj {{ collection }} wg Autor "Irzmańska, Emilia"
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Pozycja Coating functionalized with silicon carbide for cut-resistant protective glove(Wydawnictwo Politechniki Łódzkiej, 2022) Kropidłowska, Paulina; Irzmańska, Emilia; Jurczyk-Kowalska, MagdalenaWorkers’ hands are at the highest risk of being affected by harmful factors in the work environment and upper limb injury is the most widespread type of workplace accident occurring during the performance of manual tasks. The protective properties of glove materials may be improved by continuous or spot coating [1–2] with polymeric materials such as poly(vinyl chloride), polyurethane, silicone, and natural or nitrile rubber [3–6]. The objective of the present work was to evaluate the effects of different size of particles added to a polymer material applied onto a textile carrier on the cut resistance of the resulting material. Knitted aramid textile samples were coated in laboratory conditions using a polymer paste that was functionalized with silicon carbide (SiC) reinforcing particles of three different size fractions. On the basis of the research it was found that the smallest size of SiC particles had the greatest effect on increasing cut resistance.Pozycja Cut protective materials from the point of view of working environment(Wydawnictwo Politechniki Łódzkiej, 2022) Kropidłowska, Paulina; Irzmańska, Emilia; Andziński, RadosławCut resistance is defined as the ability of material to resist a blade, which may be determined by means of a variety and evaluation methods, depending on the intended use of the material and the applied cutting factor. Some of the earliest studies on cutting were conducted in the 1990s involving textile and polymeric materials. The obtained results were characterized by exponential regression indicating that blade movement (the length of the cutting path) decreases with increasing loading. Those results were reflected in the first version of the international standards specifying cut resistance testing [1–2]. Cut resistance tests given in international standards are mostly used for proving that products meet specific normative requirements, but they fail to account for the complexity of the physics of cutting and fall short in terms of evaluating advanced materials arising with the fast-paced development of materials technologies [3]. Moreover, the available literature does not contain many research on the cut resistance properties of e.g. three-dimensional hybrid textile materials taking into account the real conditions of use. As a result, it is need to develop more objective methods for evaluating cut resistance properties, therefore preliminary assumptions for the new method has been described in this paper.Pozycja Investigation of wettability measurements of protective gloves materials(Wydawnictwo Politechniki Łódzkiej, 2022) Irzmańska, Emilia; Adamus-Włodarczyk, Agnieszka; Jastrzębska, Aleksandra; Litwicka, NataliaWettability measurements of the polymeric materials that are designed to be used for protective gloves are the key aspect in the evaluation of their potential safety of use. The gloves made of polymeric materials that will be resistant to chemical or biological contamination should exhibit low wettability and good adhesive properties to reduce the possibility of accumulation of hazardous substances on the surfaces of the gloves together with losing dexterity of hand movement during work. Currently, in laboratory practice, there is no method to investigate thoroughly the wetting properties of polymeric surfaces taking into consideration parameters like water permeability index, non-wettability index, and absorption index. The presented research concerns the novel way of measuring the wettability of polymeric protective gloves, and the validation of the proposed method. Based on the series of performed measurements, a thorough assessment of the uncertainty budgets for individual components of performed metrological analysis of obtained results was performed. Based on these findings, the measurement errors that could affect the reliability, repeatability, and quality of the performed investigation have been identified.Pozycja A self-healing system for the soles of all rubber protective footwear(Wydawnictwo Politechniki Łódzkiej, 2022) Adamus-Włodarczyk, Agnieszka; Irzmańska, Emilia; Szczepański, Grzegorz; Strąkowska, Anna; Rezmer, Sebastian; Dobrowolski, MirosławThe objective of work was to improve the safety performance of protective footwear by increasing its service time using next-generation polymeric materials featuring autonomous self-healing mechanisms capable of repairing mechanical defects in a sole structure without an external intervention. The project innovation consists of using autonomous self-healing mechanisms in protective footwear to increase its service time and improve its safety performance in the workplace. Some mechanical defects naturally occur in the structure of personal protective equipment in the course of its normal use. While initially those defects are often not visible and difficult to detect, they may compromise polymeric materials and over time lead to permanent damage and shorter service times. The applied autonomous self-healing mechanisms (ASMs) have the capacity of immediate material regeneration without the external intervention. The first ASM involves a micro-encapsulated monomer released in the case of damage to fill the resulting defect in the sole. The other ASM involves the implementation of a network of channels supplying the monomer to the damaged area.Pozycja Tekstylia o działaniu profilaktycznym w odniesieniu do uszkodzeń skór(Wydawnictwo Politechniki Łódzkiej, 2009) Irzmańska, EmiliaThe dissertation presents research on application of designed and produced fabrics characterised by a specific distribution of hydrophobic and hydrophilic fibres in their structure and by their varied contact with the user’s skin (from the point of view of the degree of fabrics surface complexity). The fabrics mentioned were applied for bed sheets usage in the hospital conditions by long-term immobile persons at risk of bedsores formation. The preventive effect of the fabrics was analysed in the aspect of external and internal factors taken into consideration in bedsores etiology. In range of external factors was carried out model testing of the heat and moisture transport by fabrics in simulated conditions of bed sheets usage. Additionally, in range of internal factors was carried out changes of local blood flow in a place under high risk of bedsores formation in conditions of long-term immobility. For this purpose the impedance plethysmography method was applied to detect changes in blood flow in local vascular system.