Syndiotactic polypropylene nanofibers obtained from solution electrospinning process at ambient temperature

2015 ◽  
Vol 133 (13) ◽  
pp. n/a-n/a ◽  
Author(s):  
Tomoki Maeda ◽  
Keita Takaesu ◽  
Atsushi Hotta
Keyword(s):  
Ambient Temperature ◽  
Electrospinning Process ◽  
Syndiotactic Polypropylene ◽  
Solution Electrospinning

Role of Macromolecular Factor in Polymer Solution Electrospinning Process

2017 ◽  
Vol 49 (3) ◽  
pp. 151-160
Author(s):  
Yu. N. Filatov ◽  
I. Yu. Filatov ◽  
M. A. Smul’skaya
Keyword(s):  
Polymer Solution ◽  
Electrospinning Process ◽  
Solution Electrospinning

Study of Preparation Metallocene Based LLDPE Extra-Fibers by Melt Electrospinning Process

2012 ◽  
Vol 512-515 ◽  
pp. 2424-2427
Author(s):  
Na Zhao ◽  
Tai Qi Liu ◽  
Rui Xue Liu
Keyword(s):  
Field Strength ◽  
High Viscosity ◽  
Electrospinning Process ◽  
Electrospun Fibers ◽  
Optimal Parameters ◽  
Common Solution ◽  
Melt Electrospinning ◽  
Fine Fiber ◽  
Electrospinning Method ◽  
Solution Electrospinning

In this paper, metallocene based LLDPE (mLLDPE) extra-fine fiber , which can not be processed by a common solution electrospinning method.was successfully prepared via a melt electrospinning method. First, a self-designed melt electrospinning device was manufctured and it was used to produce mLLDPE fibers . Then LLDPE extra-fine fiber was successfully prepared by addition of viscosity-reducing additive such as wax, and the resulted fiber was charctered by SEM. Last, the optimal parameters for the preparation of mLLDPE fiber was determined. The experimental results show that commercial mLLDPE can hardly be processed to fibers because of its high viscosity. The diameter and morphology of resulted mLLDPE electrospun fibers depend on the electrospinning parameters such as electric field strength and collecting distance.

Syndiotactic Polystyrene Nanofibers Obtained from High-Temperature Solution Electrospinning Process

2010 ◽  
Vol 43 (5) ◽  
pp. 2371-2376 ◽  
Author(s):  
Yong-Wen Cheng ◽  
Hsin-An Lu ◽  
Yin-Chi Wang ◽  
Annette Thierry ◽  
Bernard Lotz ◽  
...  
Keyword(s):  
High Temperature ◽  
Electrospinning Process ◽  
Syndiotactic Polystyrene ◽  
High Temperature Solution ◽  
Temperature Solution ◽  
Solution Electrospinning

Development of Nanostructured Thermoregulating Textile Materials

2008 ◽  
Vol 8 (9) ◽  
pp. 4399-4403 ◽  
Author(s):  
Valentina Romeo ◽  
Vittoria Vittoria ◽  
Andrea Sorrentino
Keyword(s):  
Ambient Temperature ◽  
Phase Change ◽  
Phase Change Material ◽  
Morphological Analysis ◽  
Average Diameter ◽  
Electrospinning Process ◽  
Functional Material ◽  
Textile Materials ◽  
Microencapsulated Phase Change Material ◽  
Change Material

The present studies provide the first example of a nanostructured thermoregulating textile materials obtained by electrospinning process. Microencapsulated phase change material was dispersed into a Poly(ε-caprolactone) (PCL)-acetone solution and electrospun at ambient temperature. The morphological analysis showed that the addition of microcapsules to the PCL lead to the formation of nanofibers with a significantly lower average diameter with respect to that obtained by pure PCL in the same conditions. The resulting functional material has demonstrated to have the higher efficiency in the thermoregulating effect in comparison with more of the dispersion methods used up to now.

Formation of PA12 fibres via melt electrospinning process: parameter analysis and optimisation

2019 ◽  
Vol 40 (1) ◽  
pp. 49-56
Author(s):  
Dalia Buivydiene ◽  
Lauryna Dabasinskaite ◽  
Edvinas Krugly ◽  
Linas Kliucininkas
Keyword(s):  
Fibre Diameter ◽  
Electrospinning Process ◽  
Process Parameter ◽  
Parameter Analysis ◽  
Diameter Distribution ◽  
Melt Temperature ◽  
Average Value ◽  
Screening Experiments ◽  
Melt Electrospinning ◽  
Solution Electrospinning

Abstract Melt electrospinning is a fast-emerging technique for fibre formation. While the process is similar to solution electrospinning, the absence of solvents broadens the applications, avoiding the potential toxicity of solvent residues and enables the usage of non-dissolvable polymers. In this article, the influence of selected melt electrospinning process parameters (tip-to-collector distance, voltage, and melt temperature) on fibre diameter and diameter distribution was investigated. The screening experiments indicated that the lowest fibre diameter median was 2.19 μm. Based on the dependencies between each process parameter and median fibre diameter, the authors used response-surface plots to determine the optimal conditions to produce fibres with the desired fibre diameters. The lowest fibre diameters were obtained with the following process parameter input values: temperature, 348°C; voltage, 19 kV; and tip-to-collector distance, 3 cm. The obtained fibres indicated that the average value of fibre diameter medians decreased in comparison to the screening experiment and the median fibre diameter for the sample “Optim.” was 1.27 μm.

scholarly journals The Effect of Dye and Pigment Concentrations on the Diameter of Melt-Electrospun Polylactic Acid Fibers

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2321 ◽  
Author(s):  
N.K. Balakrishnan ◽  
K. Koenig ◽  
G. Seide
Keyword(s):  
Electrical Conductivity ◽  
Polylactic Acid ◽  
Electrical Resistance ◽  
Polymer Melt ◽  
High Viscosity ◽  
Electrospinning Process ◽  
Polymer Aggregates ◽  
Melt Electrospinning ◽  
Coarse Fibers ◽  
Solution Electrospinning

Sub-microfibers and nanofibers produce more breathable fabrics than coarse fibers and are therefore widely used in the textiles industry. They are prepared by electrospinning using a polymer solution or melt. Solution electrospinning produces finer fibers but requires toxic solvents. Melt electrospinning is more environmentally friendly, but is also technically challenging due to the low electrical conductivity and high viscosity of the polymer melt. Here we describe the use of colorants as additives to improve the electrical conductivity of polylactic acid (PLA). The addition of colorants increased the viscosity of the melt by >100%, but reduced the electrical resistance by >80% compared to pure PLA (5 GΩ). The lowest electrical resistance of 50 MΩ was achieved using a composite containing 3% (w/w) indigo. However, the thinnest fibers (52.5 µm, 53% thinner than pure PLA fibers) were obtained by adding 1% (w/w) alizarin. Scanning electron microscopy revealed that fibers containing indigo featured polymer aggregates that inhibited electrical conductivity, and thus increased the fiber diameter. With further improvements to avoid aggregation, the proposed melt electrospinning process could complement or even replace industrial solution electrospinning and dyeing.

scholarly journals Toughening and Healing of CFRPs by Electrospun Diels–Alder Based Polymers Modified with Carbon Nano-Fillers

2021 ◽  
Vol 5 (9) ◽  
pp. 242
Author(s):  
Athanasios Kotrotsos ◽  
Constantinos Rouvalis ◽  
Anna Geitona ◽  
Vassilis Kostopoulos
Keyword(s):  
High Performance ◽  
Healing Process ◽  
Electrospinning Process ◽  
Diels Alder ◽  
Self Healing ◽  
Reinforced Plastics ◽  
Fiber Bridging ◽  
Carbon Nano Tubes ◽  
Solution Electrospinning ◽  
Areas Of Interest

In the present investigation, thermo-reversible bonds formed between maleimide and furan groups (Diels–Alder (DA)-based bis-maleimides (BMI)) have been generated to enable high-performance unidirectional (UD) carbon fiber-reinforced plastics (CFRPs) with self-healing (SH) functionality. The incorporation of the SH agent (SHA) was performed locally, only in areas of interest, with the solution electrospinning process (SEP) technique. More precisely, reference and modified CFRPs with (a) pure SHA, (b) SHA modified with multi-walled carbon nano-tubes (MWCNTs) and (c) SHA modified with graphene nano-platelets (GNPs) were fabricated and further tested under Mode I loading conditions. According to experimental results, it was shown that the interlaminar fracture toughness properties of modified CFRPs were considerably enhanced, with GNP-modified ones to exhibit the best toughening performance. After the first fracture and the activation of the healing process, C-scan inspections revealed, macroscopically, a healing efficiency (H.E.) of 100%; however, after repeating the tests, a low recovery of mechanical properties was achieved. Finally, optical microscopy (OM) examinations not only showed that the epoxy matrix at the interface was partly infiltrated by the DA resin, but it also revealed the presence of pulled-out fibers at the fractured surfaces, indicating extended fiber bridging between crack flanks due to the presence of the SHA.

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