Study of selected physical, chemical and biological properties of selected materials intended for contact with human body

Mrówka, Maciej; Machoczek, Tomasz; Jureczko, P.; Szymiczek, M.; Skonieczna, Magdalena; Marcoll, Łukasz

doi:10.2478/pjct-2019-0001

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…The iron compounds contained in the halloysite (18-22%) support cell proliferation. Research performed in 2006 [31] showed an increase in HeparRG ™ (human hepatic cell line) proliferation in response to halloysite.…”

Section: Results Of Cytotoxicity Testmentioning

confidence: 99%

The influence of halloysite on the physicochemical, mechanical and biological properties of polyurethane-based nanocomposites

et al. 2020

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The impact of the addition of the nanofiller -halloysite -on the mechanical, physicochemical and biological properties of a nanocomposite, in which thermoplastic polyurethane fulfilled the role of the matrix was investigated. The nanocomposite was obtained by extrusion in three variants with 1, 2 and 3 wt % halloysite. The nanostructure of the obtained materials was confirmed using Atomic Force Microscopy (AFM). Based on the mechanical tests carried out, it was proven that the obtained nanocomposites were characterized by a tensile modulus greater than the polyurethane constituting the matrix. The density and hardness of the nanocomposites had changed within error limits compared to unmodified polyurethane. Biological tests showed no cytotoxicity of all the tested materials to normal human dermal fibroblasts (NHDF). Degradation tests were carried out in artificial plasma and showed that samples with 2 wt % halloysite addition had the best ratio of tensile strength and elongation at break to elasticity modulus.

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Section: Results Of Cytotoxicity Testmentioning

confidence: 99%

The influence of halloysite on the physicochemical, mechanical and biological properties of polyurethane-based nanocomposites

et al. 2020

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“…Polymer composites, which include supplementary modifi ers (e.g. powder) in addition to the abovementioned fi bres, are referred to as hybrid composites [17][18][19]. They are designed primarily to improve selected properties of composites that contribute to their fi nal application character.…”

Section: Introductionmentioning

confidence: 99%

Selected Construction Properties of Hybrid Epoxy Composites Reinforced with Carbon Fiber and Alumina

Krzyżak¹,

Relich²,

Kosicka³

et al. 2022

Adv. Sci. Technol. Res. J.

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The purpose of this study is to investigate the impact of the introduction of powder modifi er into composite reinforced with carbon fabric on selected mechanical properties. The tests were performed on 16 groups of hybrid epoxy composites, including one reference group and 15 groups containing alumina with the grain size of F220, F240, F280, F320 and F360, added in the weight percent of 5%, 10% and 15%. This composite was made of certifi ed components designed for application in the aviation industry. Test results indicated that the increase of alumina content by weight caused thea decrease of strength of polymer composites in most tests. The value of the force transferred by the composite in the tensile test increased disproportionately to the cross section. It resulted in decreased strength. The addition of alumina impeded the super-saturation of the carbon fabric, which caused discontinuities in the matrix material.

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“…Therefore, it is necessary to determine the effect of the composition of the materials [ 10 , 11 ] as well as the working conditions (such as temperature, UV radiation and humidity) on the properties for parts made of these materials.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Selected Atmospheric Conditions on the Process of Abrasive Wear of CFRP

Krzyżak¹,

Racinowski²,

Szczepaniak³

et al. 2020

Materials

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The aim of this study was to examine the impact of weathering and thermal shocks on the abrasive wear of epoxy resin composites reinforced with carbon fabric that are commonly used in aviation. The composite was exposed to degradation in an apparatus simulating weathering and thermal shocks and then subjected to an abrasion process, with and without the presence of water. The abrasive wear was controlled by checking the weight loss as well as by visual inspection. The research findings indicated a significant effect of the presence of water in the process of friction upon the deterioration of composite resistance to abrasion with regard to dry friction. The long-term impact of rapid cyclic temperature changes (temperature difference: from −56.5 °C to +60 °C) and a combined effect of UV-A (0.83 W/m2), along with condensation of vapor and an increased ambient temperature (above 50 °C), influenced an improvement in resistance to abrasive wear. The environment of thermal shocks diminished abrasive wear to a much smaller extent than after exploitation in an environment of weathering but both environments contributed to the degradation of the surface layer. Additionally, the environment with UV-A radiation resulted in exposure of the composite reinforcement already after four months of environmental impact.

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Study of selected physical, chemical and biological properties of selected materials intended for contact with human body

Cited by 6 publications

References 4 publications

The influence of halloysite on the physicochemical, mechanical and biological properties of polyurethane-based nanocomposites

The influence of halloysite on the physicochemical, mechanical and biological properties of polyurethane-based nanocomposites

Selected Construction Properties of Hybrid Epoxy Composites Reinforced with Carbon Fiber and Alumina

The Impact of Selected Atmospheric Conditions on the Process of Abrasive Wear of CFRP

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