Grabowska, Beata
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inżynieria materiałowa
nauki chemiczne
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Item type:Article, Access status: Open Access , Polylactide Used as Filament in 3D Printing – Part 2: TG-DTG, DSC and DRIFT Investigations(AGH University Press, 2023) Grabowska, Beata; Skowron, Mateusz; Kaczmarska, KarolinaIn this second part of the article, we delve deeper into the research area initiated in the first part, focusing on the critical exploration of polylactide (PLA) modification to enhance thermal and mechanical properties in PLA-based materials, building upon the insights obtained from comprehensive structural and thermal analyses utilizing analytical methods such as infrared spectroscopy (FTIR), diffuse reflectance infrared spectroscopy (DRIFT), and thermoanalytical research (DRIFT, TG-DTG). A series of structural and thermal analysis research (TG-DTG, DSC, DRIFT) were performed for samples of polylactide (PLA), which is commonly used in additive technologies as a structural material. In total, four materials were considered, including two containing dyes with different colors, a material made of PLA recyclate and a graphene-modified PLA material. It was noted that PLA material reinforced with graphene phase (GRAFYLON®) retains the best thermal properties (TG-DTG), which results in its wider potential for processing, including further modification and usability in manufacturing vehicle structural elements. Recycled PLA material (ALFA+W) was characterized by a higher melting point (T$_{p}$) by more than 20°C than other samples (DSC analysis), so it can be more useful in the production of structural elements operating and used at elevated temperatures.Item type:Interactive Resource, Access status: Metadata only , Inżynieria materiałowa: wybrane metody i procesy(2020) Grabowska, Beata; Kaczmarska, Karolina; Bobrowski, Artur
Wydział Odlewnictwa; Centrum e-Learningu i Innowacyjnej DydaktykiKurs zawiera podstawowe informacje związane z wybranymi metodami i procesami stosowanymi w inżynierii materiałowej. Kurs składa się z sześciu modułów. Każdy z nich zawiera część teoretyczną (wprowadzenie do zagadnienia podsumowane testem) oraz praktyczną – zadanie czy problem do rozwiązania w oparciu o filmowy instruktaż i instrukcję.Item type:Article, Access status: Open Access , TG-DTG-DSC, FTIR, DRIFT, and Py-GC-MS studies of thermal decomposition for poly(sodium acrylate)/dextrin (PAANa/D) – new binder BioCo3(2017) Grabowska, Beata; Kaczmarska, Karolina; Bobrowski, Artur; Żymankowska-Kumon, Sylwia; Kurleto-Kozioł, ŻanetaTG-DTG-DSC, FTIR, DRIFT, and Py-GC-MS studies have been conducted to determine the effect of the thermal decomposition conditions and structure of foundry binder BioCo3 in the form of a composition poly(sodium acrylate)/dextrin (PAANa/D) on the progress of degradation in terms of processes occurring in foundry sands in contact with liquid metal. TG-DTG-DSC curves of the composition allowed us to determine the temperature range in which they do not undergo degradation, by which they do not lose their binding properties. With temperature increasing, physical and chemical changes occur that are related to the evaporation of solvent water (20–110°C), followed by the release of constitution water, and finally intermolecular dehydration (110–230°C). In this temperature range, processes that are mainly reversible take place. Within a temperature range of 450–826°C, polymer chains are decomposed, including the decomposition of side chains. Within a temperature range of 399–663°C, polymer composition decomposition can be observed (FTIR, DRIFT), and gas products are generated from this destruction (Py-GC-MS).Item type:Article, Access status: Open Access , Welcome to the Journal of Casting and Materials Engineering(AGH University Press, 2017) Grabowska, BeataItem type:Article, Access status: Open Access , Physicochemical investigations of hydrogels containing gold nanoparticles designed for biomedical use(AGH University of Science and Technology Press, 2021) Głąb, Magdalena; Kudłacik-Kramarczyk, Sonia; Drabczyk, Anna Karolina; Grabowska, Beata; Tyliszczak, BożenaCurrently, many investigations are being performed to develop dressing materials with a positive effect on the wound healing process. In general, innovative dressings should ensure wound exudate absorption, constitute an external barrier limiting the possibility of wound contamination and, importantly, also provide therapeutic properties. This work is focused on obtaining materials with potential use as dressings for treatment of difficult-to-heal wounds. The synthesis methodology of acrylic hydrogels modified with selected modifiers, i.e. arabic gum, nanogold, bee pollen and chamomile extract, was developed. Next, the sorption properties of the materials were determined as well as their behavior during the incubation in fluids imitating the environment of the human body. Additionally, the impact of such an incubation on their structure was evaluated by FT-IR spectroscopy. It was proved that the modifiers affected the sorption properties of hydrogels, i.e. samples with additives showed even approx. 2.5-fold lower swelling ability. In turn, incubation of hydrogels in simulated body fluids did not cause any rapid changes in pH, which may indicate the biocompatibility of the tested materials with the tested fluids. Thus, it may be concluded that the developed materials show great application potential for biomedical purposes and may be subjected to more advanced studies such as cytotoxicity assessments towards selected cell lines.Item type:Article, Access status: Open Access , Polylactide used as filment in 3D printing - Part 1: FTIR, DRIFT and TG-DTG studies(AGH University of Science and Technology Press, 2020) Grabowska, Beata; Kaczmarska, Karolina; Cukrowicz, Sylwia; Mączka, Elżbieta; Bobrowski, ArturA short literature review was undertaken in terms of the structure, properties and applications of polymers, including those commonly used in 3D printing. The research part included the structural and thermal analysis of polylactide (PLA), which is an example of an extensively used polymer in the developing 3D technology. Special attention was paid to the comparison of structure and thermal stability of two different (from various producers) polylactide samples. The research, involving such analytical methods as infrared spectroscopy (FTIR) and diffuse reflectance infrared spectroscopy (DRIFT), allowed the comparison of the structure of the two PLA samples considered. The determination of the temperature range in which changes related to PLA thermodestruction occur was a result of the performed thermoanalytical research (DRIFT, TG-DTG). Thermal studies also allowed to establish the temperature range in which the material does not yet degrade, which is important in the context of future planned research work on polylactide modification to obtain the improvement of the thermal and mechanical properties of PLA-based materials. This research area will be described in the second part of the publication.