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.

Fine structure formation and physical properties of poly(butylene terephthalate) fibres in high-speed melt spinning

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Hee Lee Sun ◽  
Hou Kim Kyoung ◽  
Kikutani Takeshi ◽  
Hok Cho Hyun
Keyword(s):  
Fine Structure ◽  
Physical Properties ◽  
Structure Formation ◽  
High Speed ◽  
Melt Spinning ◽  
Mechanical Analysis ◽  
Scanning Calorimetry ◽  
Butylene Terephthalate ◽  
Initial Modulus ◽  
Higher Temperature

Abstract Poly(butylene terephthalate) (PBT) fibres were obtained by high-speed melt spinning up to a take-up velocity of 8 km/min. Fine structure formation and physical properties of these fibres were investigated. The increase of take-up velocity caused raises in both density and birefringence. In wide-angle X-ray diffraction equatorial profiles, the increase of take-up velocity can be observed in the (010) and (100) reflections of β-crystals; the reflection peaks are the sharpest at a take-up velocity of 6 km/min. The initial modulus of the fibres arises when the fraction of β-crystals is increased, while the tenacity depends more on the fraction of α-crystals, i.e., the total crystallinity. Thermal properties of high-speed spun PBT fibres were measured with differential scanning calorimetry, dynamic mechanical and thermo-mechanical analysis, etc. Endothermic curves become sharper with increasing take-up velocity, and endothermic melting peaks are shifted to higher temperature. Crystal structures are well developed in fibres obtained at higher take-up velocities. The tan δ peaks of PBT fibres tend to shift to higher temperature and the peak intensity is decreased with increasing take-up velocity, i.e., the packing density of PBT fibres is high when the take-up velocity and thus the orientation of amorphous regions is increased. The shrinkage has a tendency to decrease with increasing take-up velocity.

Enhancing the flame retardancy of polyamide 6 by guanidine sulfamate‐modified carbon nanoparticles: Carbon nanotubes versus graphite oxide

2018 ◽  
Vol 40 (S2) ◽  
pp. E1884-E1892 ◽  
Author(s):  
Zhang Sheng ◽  
Guo Jia ◽  
Sun Yongyuan ◽  
Lv Zhaoxia ◽  
Jin Xiaodong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Flame Retardancy ◽  
Graphite Oxide ◽  
Carbon Nanoparticles ◽  
Polyamide 6

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 Characterization of functional single jersey knitted fabrics using non-conventional yarns for sportswear

2016 ◽  
Vol 88 (3) ◽  
pp. 275-292 ◽  
Author(s):  
Jefferson M Souza ◽  
Sandra Sampaio ◽  
Welter C Silva ◽  
Sidney G de Lima ◽  
Andrea Zille ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Water Vapor Permeability ◽  
Thermal Control ◽  
Vapor Permeability ◽  
Knitted Fabrics ◽  
Moisture Management ◽  
Antimicrobial Efficiency ◽  
Technical Textiles ◽  
Single Jersey

Eight functional single jersey plain knitted fabrics have been developed in order to assess a quantitative analysis of various comfort-related properties in terms of thermal control, air and water vapor permeability, wickability, coefficient of kinetic friction and antimicrobial efficiency, using eight different commercially available functional yarns: Polyester Craque® and viscose Craque® conventional yarns as controls; Finecool® and Coolmax® polyester yarns for moisture management and quick drying; Holofiber® polyester yarns containing an optical responsive material that the producer claims to improve body oxygenation; Airclo® polyester hollow yarns for efficient control of body temperature; and, finally, polyester Trevira® and viscose Seacell® for antimicrobial activity. According to the results, Coolmax® for moisture management, Airclo® for thermal control and Seacell® for antimicrobial activity present the best performances as technical textiles for sportswear for the respective specific functional property.

Synthesis and structure-activity study of quaternary ammonium functionalized β-cyclodextrin-carboxymethylcellulose polymers

2011 ◽  
Vol 63 (12) ◽  
pp. 2827-2832 ◽  
Author(s):  
Danielle Bonenfant ◽  
François-René Bourgeois ◽  
Murielle Mimeault ◽  
Frédéric Monette ◽  
Patrick Niquette ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Antimicrobial Activities ◽  
Bacterial Cells ◽  
Experimental Conditions ◽  
E Coli ◽  
Antimicrobial Efficiency ◽  
Disinfection Process ◽  
Didecyldimethylammonium Chloride ◽  
Low Toxicity ◽  
Bacterial Cell Membrane

Carboxymethylcellulose (CMC) and β-cyclodextrin (β-CD)-based polymers functionalized with two types of quaternary ammonium compounds (QACs), the alkaquat DMB-451 (N-alkyl (50% C14, 40% C12, 10% C10) dimethylbenzylammonium chloride) (DMD-451) named polymer DMB-451, and FMB 1210-8 (a blend of 32 w% N-alkyl (50% C14, 40% C12, 10% C10) dimethylbenzylammonium chloride and 48 w% of didecyldimethylammonium chloride) named polymer FMB 1210-8, were synthethized and characterized by Fourier transform infrared spectroscopy. The antimicrobial activities of these polymers against Eschericia coli were also evaluated at 25 °C in wastewater. The results have indicated that the polymer FMB 1210-8 possesses a high-affinity binding with bacterial cells that induces a rapid disinfection process. Moreover, in the same experimental conditions of disinfection (mixture of 1.0 g of polymer and 100 mL of wastewater), the polymer FMB 1210-8 has a higher antimicrobial efficiency (99.90%) than polymer DMB-451 (92.8%). This phenomenon might be associated to a stronger interaction with bacterial cells due to stronger binding affinity for E. coli cells and greater killing efficiency of the C10 alkyl chains QAC of polymer FMB 1210-8 to disrupt the bacterial cell membrane as compared to N-alkyl (50% C14, 40% C12, 10% C10) dimethylbenzylammonium chloride. Together, these results suggest that the polymer FMB 1210-8 could constitute a good disinfectant against Escherichia coli, which could be advantageously used in wastewater treatments due to the low toxicity of β-CD and CMC, and moderated toxicity of FMB 1210-8 to human and environment.

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 Synthesis and Characteristics of Carbon Nanotube Using Plasma Arc Discharge

2018 ◽  
Vol 17 (3) ◽  
pp. 20-22
Author(s):  
Suhana Mohamed Sultan ◽  
Nurul Syazwani Azahurin ◽  
Azam Mohamad
Keyword(s):  
Carbon Nanoparticles ◽  
Arc Discharge ◽  
Low Cost ◽  
Average Diameter ◽  
Plasma Discharge ◽  
Arc Plasma ◽  
Electrical Characteristics ◽  
Sem Image ◽  
Plasma Arc Discharge ◽  
Device Applications

Carbon nanoparticles (CNP) were synthesized in arc plasma discharge using a simple, low-cost and toxic-free precursor gas. The structural and electrical characteristics were examined. The diameter and the height of the grown CNP was 28.5 μm and  316.7 μm , respectively. SEM image showed existence of a high density and uniform nanostructures within the cylindrical bulk CNP tube. The average diameter of the nanoparticles is 600 nm. The electrical characteristics revealed  low resistance with R = 7.23 mΩ with Cu electrodes.  In addition, the device exhibited a   high conductivity of 6.8 x 105 Scm-1. These results indicate the potential of CNP material for power device 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.

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