Effect of electron beam irradiation of collagen solution on its rheological and electrical properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00362113" target="_blank" >RIV/68407700:21220/22:00362113 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.e-congress.events/AERC2022" target="_blank" >https://www.e-congress.events/AERC2022</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of electron beam irradiation of collagen solution on its rheological and electrical properties

Popis výsledku v původním jazyce

This contribution deals with the measurement of rheological properties by squeezing flow of collagen solution (aqueous solution of bovine skin collagen) irradiated with different doses of electron beam radiation affecting changes in the structure of collagen. The electrical properties were measured together with the squeezing flow. The general goal of our research was to study the effect of electron beam radiation dose on the rheological and electrical parameters of collagen samples. The squeezing is the quasi-static compression flow of the test material between two approaching plates. The rheological properties can be evaluated from the relationship between the thickness of the gap between the two plates, the speed of the moving plate and the normal force acting on the moving plate. The tested samples were prepared from a natural aqueous solution of bovine skin collagen (solids content 8% w / w) and were irradiated with an electron beam with different doses of radiation. A texture analyzer was used for compression flow experiments. The initial distance between the plates was 20 mm, the speed of the movable top plate was 1 mm / s. The normal force acting on the top plate, the distance of the top plate from the bottom plate and the time were recorded continuously. The power approximation parameters of the first normal stresses were obtained from the measured data. The stainless steel top and bottom plates also served as electrodes connected to a Keysight LCR meter to measure electrical properties such as conductivity, impedance and dielectric properties in the frequency range up to 500 kHz. The electrical properties were measured only in the initial and final position of the movable plates. The results show an increase in consistency with increasing radiation dose, probably due to a higher proportion of cross-links in the collagen structure. Measurements of electrical parameters confirmed changes in the structure of collagen (cross-link formation caused by irradiation).

Název v anglickém jazyce

Effect of electron beam irradiation of collagen solution on its rheological and electrical properties

Popis výsledku anglicky

This contribution deals with the measurement of rheological properties by squeezing flow of collagen solution (aqueous solution of bovine skin collagen) irradiated with different doses of electron beam radiation affecting changes in the structure of collagen. The electrical properties were measured together with the squeezing flow. The general goal of our research was to study the effect of electron beam radiation dose on the rheological and electrical parameters of collagen samples. The squeezing is the quasi-static compression flow of the test material between two approaching plates. The rheological properties can be evaluated from the relationship between the thickness of the gap between the two plates, the speed of the moving plate and the normal force acting on the moving plate. The tested samples were prepared from a natural aqueous solution of bovine skin collagen (solids content 8% w / w) and were irradiated with an electron beam with different doses of radiation. A texture analyzer was used for compression flow experiments. The initial distance between the plates was 20 mm, the speed of the movable top plate was 1 mm / s. The normal force acting on the top plate, the distance of the top plate from the bottom plate and the time were recorded continuously. The power approximation parameters of the first normal stresses were obtained from the measured data. The stainless steel top and bottom plates also served as electrodes connected to a Keysight LCR meter to measure electrical properties such as conductivity, impedance and dielectric properties in the frequency range up to 500 kHz. The electrical properties were measured only in the initial and final position of the movable plates. The results show an increase in consistency with increasing radiation dose, probably due to a higher proportion of cross-links in the collagen structure. Measurements of electrical parameters confirmed changes in the structure of collagen (cross-link formation caused by irradiation).

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA21-07851S" target="_blank" >GA21-07851S: Studium metod modifikace mechanických vlastností a struktury kolagenní hmoty</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů