Evaluation of an onset of electrospun beadless poly(ethylene oxide) nanofibres

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F21%3A00531651" target="_blank" >RIV/67985874:_____/21:00531651 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/app.50001" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/app.50001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/app.50001" target="_blank" >10.1002/app.50001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of an onset of electrospun beadless poly(ethylene oxide) nanofibres

Popis výsledku v původním jazyce

To evaluate the lowest polymer concentration within a solvent from which there appears beadless nanofibres during the process of electrospinning, is rather complicated. A widely used method is based on a determination of so called entanglement concentration c(e) and the onsets of beadless nanofibres are characterized by multipliers of c(e) subjected to used materials. However, a determination of c(e) as an intersection point of two linear segments (in log-log coordinates specific viscosity vs. concentration) in a semi-dilute region is not applicable for all materials as for instance a solution of poly(ethylene oxide) (PEO) in water does not exhibit 'classical' three linear segments within the dilute and semi-dilute regions determining overlap and entanglement concentrations. For such cases a new approach for the evaluation of an initial concentration from which beadless nanofibres are produced is proposed. This method does not use the terms overlap and entanglement concentrations. The procedure is demonstrated using four PEO solutions differing in molecular weight. The relationship expressing initial concentration in dependence on PEO molecular weight containing no adjustable parameters is proposed.

Název v anglickém jazyce

Evaluation of an onset of electrospun beadless poly(ethylene oxide) nanofibres

Popis výsledku anglicky

To evaluate the lowest polymer concentration within a solvent from which there appears beadless nanofibres during the process of electrospinning, is rather complicated. A widely used method is based on a determination of so called entanglement concentration c(e) and the onsets of beadless nanofibres are characterized by multipliers of c(e) subjected to used materials. However, a determination of c(e) as an intersection point of two linear segments (in log-log coordinates specific viscosity vs. concentration) in a semi-dilute region is not applicable for all materials as for instance a solution of poly(ethylene oxide) (PEO) in water does not exhibit 'classical' three linear segments within the dilute and semi-dilute regions determining overlap and entanglement concentrations. For such cases a new approach for the evaluation of an initial concentration from which beadless nanofibres are produced is proposed. This method does not use the terms overlap and entanglement concentrations. The procedure is demonstrated using four PEO solutions differing in molecular weight. The relationship expressing initial concentration in dependence on PEO molecular weight containing no adjustable parameters is proposed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LTC19034" target="_blank" >LTC19034: Antimikrobiální nanovlákenná membrána pro filtraci vody</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

1097-4628

Svazek periodika

138

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

e50001

Kód UT WoS článku

000583491800001

EID výsledku v databázi Scopus

2-s2.0-85093823575