Plasma treatment effects on bulk properties of polycaprolactone nanofibrous mats fabricated by uncommon AC electrospinning: A comparative study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F20%3A00007757" target="_blank" >RIV/46747885:24410/20:00007757 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24510/20:00007757

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0257897220308720" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0257897220308720</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2020.126203" target="_blank" >10.1016/j.surfcoat.2020.126203</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Plasma treatment effects on bulk properties of polycaprolactone nanofibrous mats fabricated by uncommon AC electrospinning: A comparative study

Popis výsledku v původním jazyce

In this work, uncommon ACES was used to fabricate PCL ENMs making use of different solvent systems (F, FA, and FAA). Afterwards, the ENMs were exposed to a plasma surface treatment using a DBD at medium pressure with varying treatment time and discharge gas (argon and nitrogen). AC spinnability and plasma treatment effects on wettability, morphology, surface functional groups, crystallite size, and crystallinity of F-PCL, FA-PCL, and FAA-PCL ENMs were investigated for the first time. Results first revealed that the spinnability and consequently the nanofiber morphology were influenced by the used solvent systems while maintaining other electrospinning parameters: (1) the fiber diameter was found to increase in the following order: F-PCL, FA-PCL, and FAA-PCL and (2) the F-PCL and FAA-PCL samples consisted of nicely elongated beadless fibers, while the FA-PCL samples were found to still contain some beaded fibers. Argon and nitrogen DBD plasma treatments were observed to incorporate polar oxygen- or nitrogen-containing functional groups on the ENM surfaces respectively without modifying the morphological properties of the PCL samples. This functional group grafting in turn resulted into a significant increase in the surface wettability of F-PCL, FA-PCL, and FAA-PCL ENMs with WCA values decreasing from 130°–136° to 35°–48° depending on the used discharge gas and solvent system. DSC and FTIR analysis also revealed that the crystallinity degree of PCL ENMs was not significantly affected (except for the Xc value of FA-PCL) by the performed plasma treatments. On the other hand, the crystallinity degree of the pristine PCL ENMs was influenced by the used solvent system. The F-PCL and FA-PCL crystallinity degree were higher than in the case of FAA-PCL due to the hydrolytic behavior of formic acid and acetic acid. The melting temperature of F-PCL and FA-PCL was not changed upon plasma treatment nor by the used solvent system which could be attributed to the unchanged crystallite size. In contrast, the melting temperature of FAA-PCL was slightly altered by the performed plasma treatments due to an increasing crystallite size. The gathered results thus reveal that the performed plasma treatments can strongly enhance the surface wettability of PCL ENMs without strongly affecting their bulk properties. Consequently, plasma-treated PCL ENMs can be successful in multiple biomedical and tissue engineering applications, where high surface wettability is required to allow sufficient cell adhesion and proliferation.

Název v anglickém jazyce

Plasma treatment effects on bulk properties of polycaprolactone nanofibrous mats fabricated by uncommon AC electrospinning: A comparative study

Popis výsledku anglicky

In this work, uncommon ACES was used to fabricate PCL ENMs making use of different solvent systems (F, FA, and FAA). Afterwards, the ENMs were exposed to a plasma surface treatment using a DBD at medium pressure with varying treatment time and discharge gas (argon and nitrogen). AC spinnability and plasma treatment effects on wettability, morphology, surface functional groups, crystallite size, and crystallinity of F-PCL, FA-PCL, and FAA-PCL ENMs were investigated for the first time. Results first revealed that the spinnability and consequently the nanofiber morphology were influenced by the used solvent systems while maintaining other electrospinning parameters: (1) the fiber diameter was found to increase in the following order: F-PCL, FA-PCL, and FAA-PCL and (2) the F-PCL and FAA-PCL samples consisted of nicely elongated beadless fibers, while the FA-PCL samples were found to still contain some beaded fibers. Argon and nitrogen DBD plasma treatments were observed to incorporate polar oxygen- or nitrogen-containing functional groups on the ENM surfaces respectively without modifying the morphological properties of the PCL samples. This functional group grafting in turn resulted into a significant increase in the surface wettability of F-PCL, FA-PCL, and FAA-PCL ENMs with WCA values decreasing from 130°–136° to 35°–48° depending on the used discharge gas and solvent system. DSC and FTIR analysis also revealed that the crystallinity degree of PCL ENMs was not significantly affected (except for the Xc value of FA-PCL) by the performed plasma treatments. On the other hand, the crystallinity degree of the pristine PCL ENMs was influenced by the used solvent system. The F-PCL and FA-PCL crystallinity degree were higher than in the case of FAA-PCL due to the hydrolytic behavior of formic acid and acetic acid. The melting temperature of F-PCL and FA-PCL was not changed upon plasma treatment nor by the used solvent system which could be attributed to the unchanged crystallite size. In contrast, the melting temperature of FAA-PCL was slightly altered by the performed plasma treatments due to an increasing crystallite size. The gathered results thus reveal that the performed plasma treatments can strongly enhance the surface wettability of PCL ENMs without strongly affecting their bulk properties. Consequently, plasma-treated PCL ENMs can be successful in multiple biomedical and tissue engineering applications, where high surface wettability is required to allow sufficient cell adhesion and proliferation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

399

Číslo periodika v rámci svazku

OCT

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000563807700073

EID výsledku v databázi Scopus

2-s2.0-85088655617