Jelena Vasiljević (Author), Andrej Demšar (Author), Mirjam Leskovšek (Author), Barbara Simončič (Author), Nataša Čelan Korošin (Author), Ivan Jerman (Author), Matic Šobak (Author), Gregor Žitko (Author), Nigel Willy Van de Velde (Author), Marija Čolović (Author)

Abstract

Studies of the production of fiber-forming polyamide 6 (PA6)/graphene composite material and melt-spun textile fibers are scarce, but research to date reveals that achieving the high dispersion state of graphene is the main challenge to nanocomposite production. Considering the significant progress made in the industrial mass production of graphene nanoplatelets (GnPs), this study explored the feasibility of production of PA6/GnPs composite fibers using the commercially available few-layer GnPs. To this aim, the GnPs were pre-dispersed in molten ε-caprolactam at concentrations equal to 1 and 2 wt %, and incorporated into the PA6 matrix by the in situ water-catalyzed ring-opening polymerization of ε-caprolactam, which was followed by melt spinning. The results showed that the incorporated GnPs did not markedly influence the melting temperature of PA6 but affected the crystallization temperature, fiber bulk structure, crystallinity, and mechanical properties. Furthermore, GnPs increased the PA6 complex viscosity, which resulted in the need to adjust the parameters of melt spinning to enable continuous filament production. Although the incorporation of GnPs did not provide a reinforcing effect of PA6 fibers and reduced fiber tensile properties, the thermal stability of the PA6 fiber increased. The increased melt viscosity and graphene anti-dripping properties postponed melt dripping in the vertical flame spread test, which consequently prolonged burning within the samples.

Keywords

poliamid 6;nanoploščice grafena;in situ polimerizacija;predenje iz taline;tekstilna vlakna;mehansk lastnosti;termična stabilnost;gorljivost;polyamide 6;graphene nanoplatelets;in situ polymerization;melt spinning;textile fibers;mechanical properties;thermal stability;flammability;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL NTF - Faculty of Natural Sciences and Engineering
UDC: 677
COBISS: 24970755 Link will open in a new window
ISSN: 2073-4360
Views: 166
Downloads: 56
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Other data

Secondary language: Slovenian
Secondary keywords: poliamid 6;nanoploščice grafena;in situ polimerizacija;predenje iz taline;tekstilna vlakna;mehanske lastnosti;termična stabilnost;gorljivost;
Type (COBISS): Article
Pages: str. 1-19
Volume: ǂVol. ǂ12
Issue: ǂiss. ǂ8
Chronology: 10 Aug. 2020
DOI: 10.3390/polym12081787
ID: 14249370