Melt‐spinning of carboxylated MWNTs‐reinforced polyamide 6 fibers with solid mixing nanocomposites

2017 ◽  
Vol 39 (12) ◽  
pp. 4298-4309 ◽  
Author(s):  
Chen Tian ◽  
Wang Yu‐Zhou ◽  
Liu Hai‐Hui ◽  
Zhang Xing‐Xiang
Keyword(s):  
Melt Spinning ◽  
Polyamide 6

scholarly journals Characterization of Polyamide 6/Multilayer Graphene Nanoplatelet Composite Textile Filaments Obtained Via In Situ Polymerization and Melt Spinning

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1787
Author(s):  
Jelena Vasiljević ◽  
Andrej Demšar ◽  
Mirjam Leskovšek ◽  
Barbara Simončič ◽  
Nataša Čelan Korošin ◽  
...  
Keyword(s):  
Melt Spinning ◽  
In Situ Polymerization ◽  
Complex Viscosity ◽  
Polyamide 6 ◽  
High Dispersion ◽  
Multilayer Graphene ◽  
Main Challenge ◽  
Dispersion State ◽  
Continuous Filament

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.

scholarly journals Manufacturing of amber particles suitable for composite fibre melt spinning

2016 ◽  
Vol 70 (2) ◽  
pp. 51-57
Author(s):  
Inga Ļ Ļašenko ◽  
Sergejs Gaidukovs ◽  
Jūlija Rombovska
Keyword(s):  
Melt Spinning ◽  
Chemical Structure ◽  
Polyamide 6 ◽  
Polyamide Fibre ◽  
Ball Mills ◽  
Composite Fibre ◽  
Before And After ◽  
The Matrix ◽  
Average Size ◽  
Experimental Findings

Abstract Polyamide fibre containing amber particles was fabricated. The amber particles were obtained by grinding technology using planetary ball-mills. Scanning electron microscopy and granulometry testing were used to characterise the structure and the size of prepared amber particles. Fourier transform infrared spectroscopy was used to analyse the chemical structure of the amber particles. The amber particles were characterised with average size up to 3 μm. The chemical composition of amber before and after the grinding remained unchanged. The amber particles were melt-extruded using polyamide 6 as the matrix. Melt spinning processing was used to fabricate polyamide-amber filaments. Pre-oriented yarns and fully drawn yarns were obtained after hotdrawing experiments. Reported experimental findings of amber composite fibre could be important for textile applications.

scholarly journals Effect of Different Flame-Retardant Bridged DOPO Derivatives on Properties of in Situ Produced Fiber-Forming Polyamide 6

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 657 ◽  
Author(s):  
Jelena Vasiljević ◽  
Marija Čolović ◽  
Nataša Čelan Korošin ◽  
Matic Šobak ◽  
Žiga Štirn ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Melt Spinning ◽  
Research Work ◽  
Polyamide 6 ◽  
Fibrous Materials ◽  
Comprehensive Properties ◽  
Novel Approach ◽  
Dispersion State ◽  
Spinning Process

The production of sustainable and effective flame retardant (FR) polyamide 6 (PA6) fibrous materials requires the establishment of a novel approach for the production of polyamide 6/FR nanodispersed systems. This research work explores the influence of three different flame-retardant bridged 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivatives on the comprehensive properties of in situ produced PA6/FR systems. To this end, in situ water-catalyzed ring-opening polymerization of ε-caprolactam was conducted in the presence of three different bridged DOPO derivatives, e.g., one P−N bond phosphonamidate derivative and two P−C bond phosphinate derivatives. The selected bridged DOPO derivatives mainly act in the gas phase at the temperatures that relatively match the PA6 pyrolysis specifics. The effects of the FRs on the dispersion state, morphological, molecular, structural, melt-rheological, and thermal properties of the in situ synthesized PA6 were evaluated. The specific advantage of this approach is one-step production of PA6 with uniformly distributed nanodispersed FR, which was obtained in the case of all three applied FRs. However, the applied FRs differently interacted with monomer and polymer during the polymerization, which was reflected in the length of PA6 chains, crystalline structure, and melt-rheological properties. The applied FRs provided a comparable effect on the thermal stability of PA6 and stabilization of the PA6/FR systems above 450 °C in the oxygen-assisted pyrolysis. However, only with the specifically designed FR molecule were the comprehensive properties of the fiber-forming PA6 satisfied for the continuous conduction of the melt-spinning process.

Modification of the mechanical properties of polyamide 6 multifilaments in high-speed melt spinning with nano silicates

2012 ◽  
Vol 82 (18) ◽  
pp. 1846-1858 ◽  
Author(s):  
Wilhelm Steinmann ◽  
Stephan Walter ◽  
Thomas Gries ◽  
Gunnar Seide ◽  
Georg Roth
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Melt Spinning ◽  
Polyamide 6

scholarly journals Preparation and characterization of polyamide 6 fibre based on a phosphorus-containing flame retardant

RSC Advances ◽  
2018 ◽  
Vol 8 (17) ◽  
pp. 9261-9271 ◽  
Author(s):  
Ke Liu ◽  
Yuanyuan Li ◽  
Lei Tao ◽  
Ru Xiao
Keyword(s):  
Flame Retardant ◽  
Melt Spinning ◽  
Polyamide 6 ◽  
Melt Polycondensation ◽  
Phosphorus Containing

Intrinsically flame retardant polyamide 6 (FRPA6) was synthesized by melt polycondensation of caprolactam and 9,10-dihydro-10-[2,3-di(hydroxycarbonyl)propyl]-10-phosphaphenanthrene-10-oxide (DDP). And the FRPA6 fibres were prepared by melt spinning.

Development of novel segmented-pie microfibers from copper-carbon nanoparticles and polyamide composite for antimicrobial textiles application

2021 ◽  
pp. 004051752199348
Author(s):  
Longsheng Jin ◽  
Fang Zhou ◽  
Shaohua Wu ◽  
Congjing Cui ◽  
Shibin Sun ◽  
...  
Keyword(s):  
Carbon Nanoparticles ◽  
Melt Spinning ◽  
Average Diameter ◽  
Polyamide 6 ◽  
Antimicrobial Activities ◽  
Healthcare Applications ◽  
Twin Screw Extruders ◽  
Antimicrobial Efficiency ◽  
Technical Textiles ◽  
Initial Modulus

Development of novel antibacterial fibers with mass production is urgently required in the technical textiles industry. In this paper, a series of segmented-pie composite microfibers based on polyamide 6 (PA6) and different amounts of copper–carbon nanoparticles (CuCNPs) were fabricated by utilizing a melt-spinning apparatus with twin-screw extruders. The encapsulation of CuCNPs and the formation of segmented-pie structure of as-prepared PA6/CuCNP microfibers were confirmed. The CuCNPs or their agglomeration with an average diameter of approximately 200 nm exhibited a uniform distribution in PA6/CuCNP segmented-pie microfibers. Compared with the pure PA6 microfibers, the PA6/CuCNP segmented-pie microfibers showed obviously enhanced crystallinity, thermal stability as well as UV resistance. As the CuCNP content increased to 1.0 wt%, the tensile strength and initial modulus increased to 3.79 cN/dtex and 22.4 cN/dtex, respectively. Importantly, the PA6/CuCNP segmented-pie microfibers presented excellent antimicrobial activities to both Escherichia coli and Staphylococcus aureus (antimicrobial efficiency around 99%) and great antifungal activity to Candida albicans (antimicrobial efficiency around 82%). Taken together, our present study demonstrated that the PA6/CuCNP segmented-pie microfibers show great prospects in the fabrication of technical textiles for healthcare applications.

scholarly journals In situ prepared polyamide 6/DOPO-derivative nanocomposite for melt-spinning of flame retardant textile filaments

2019 ◽  
Vol 166 ◽  
pp. 50-59 ◽  
Author(s):  
Jelena Vasiljević ◽  
Marija Čolović ◽  
Ivan Jerman ◽  
Barbara Simončič ◽  
Andrej Demšar ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Melt Spinning ◽  
Polyamide 6

scholarly journals Selection of Immiscible Polymer Blends Filled with Carbon Nanotubes for Heating Applications

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1827 ◽  
Author(s):  
Marischal ◽  
Cayla ◽  
Lemort ◽  
Campagne ◽  
Devaux
Keyword(s):  
Carbon Nanotubes ◽  
Melt Spinning ◽  
Filler Content ◽  
Conductive Polymer ◽  
Polyamide 6 ◽  
Electrically Conductive ◽  
Joule Effect ◽  
Immiscible Blends ◽  
Selective Localization ◽  
Application Fields

In many application fields, such as medicine or sports, heating textiles use electrically conductive multifilaments. This multifilament can be developed from conductive polymer composites (CPC), which are blends of an insulating polymer filled with electrically conductive particles. However, this multifilament must have filler content above the percolation threshold, which leads to an increase of the viscosity and problems during the melt spinning process. Immiscible blends between two polymers (one being a CPC) can be used to allow the reduction of the global filler content if each polymer is co-continuous with a selective localization of the fillers in only one polymer. In this study, three immiscible blends were developed between polypropylene, polyethylene terephthalate, or polyamide 6 and a filled polycaprolactone with carbon nanotubes. The morphology of each blend at different ratios was studied using models of co-continuity and prediction of fillers localization according to viscosity, interfacial energy, elastic modulus, and loss factor of each polymer. This theoretical approach was compared to experimental values to find out differences between methods. The electrical properties (electrical conductivity and Joule effect) were also studied. The co-continuity, the selective localization in the polycaprolactone, and the Joule effect were only exhibited by the polypropylene/filled polycaprolactone 50/50 wt.%.

Preparation of Flame Retardant Polyamide 6 Fibers with Melamine Cyanurate and Bicyclic Phosphates via Melt Spinning

2012 ◽  
Vol 621 ◽  
pp. 44-47 ◽  
Author(s):  
Yun Zhi Lin ◽  
Kai Sha ◽  
Hai Yan Xu ◽  
Yin Tang ◽  
Ru Xiao
Keyword(s):  
Flame Retardant ◽  
Polyethylene Oxide ◽  
Melt Spinning ◽  
Oxygen Index ◽  
Polyamide 6 ◽  
Solid Residue ◽  
Melamine Cyanurate ◽  
Dispersing Agent ◽  
Ft Ir ◽  
Co Addition

Melamine cyanurate (MCA) and bicyclic phosphates (BP) were combined and added into polyamide6 (PA6) with the polyethylene oxide (PEO) as dispersing agent by melt blend, then the flame retardant PA6 fibers were prepared by melt spinning. Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) were utilized to characterize the morphology and properties of the blends. The results indicated that the MCA particles with diametric size about 400nm are highly uniformly in the PA6 matrix, the spinnability and tensile strength of flame retardant PA6 fibers declined due to co-addition of MCA and M102B, TGA showed the flame retardant PA6 fibers decomposed early and retained high solid residue. From Flammability testing, an increase of oxygen index to 33.2% and an improvement of the UL-94 classification to V-0 were observed.

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