scholarly journals Synthesis of Biodegradable Plastics from Dyeing Wastewater and Optimization of Continuous Poly(3-Hydroxybutyrate) Fibrous Membranes via Electrospinning Process

2020 ◽  
Vol 08 (12) ◽  
pp. 71-79
Author(s):  
Yaohui Liu ◽  
Yanming Wang ◽  
Cheng-Hao Lee ◽  
Chi-Wai Kan ◽  
Hong Chua
Keyword(s):  
Biodegradable Plastics ◽  
Electrospinning Process ◽  
Dyeing Wastewater ◽  
Fibrous Membranes

scholarly journals Tb3+/Eu3+ Complex-Doped Rigid Nanoparticles in Transparent Nanofibrous Membranes Exhibit High Quantum Yield Fluorescence

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 694 ◽  
Author(s):  
Peng Lu ◽  
Yanxin Wang ◽  
Linjun Huang ◽  
Sixian Lian ◽  
Yao Wang ◽  
...  
Keyword(s):  
Emission Spectra ◽  
Electrospinning Process ◽  
Fluorescence Properties ◽  
Quantum Yields ◽  
Scanning Calorimetry ◽  
Force Microscopy ◽  
Β Phase ◽  
Atomic Force ◽  
Potential Applications ◽  
Fibrous Membranes

In this study, transparent membranes containing luminescent Tb3+ and Eu3+ complex-doped silica nanoparticles were prepared via electrospinning. We prepared the electrospun fibrous membranes containing Tb(acac)3phen- (acac = acetylacetone, phen = 1,10-phenanthroline) and/or Eu(tta)3phen- (tta = 2-thenoyltrifluoroacetone) doped silica (M-Si-Tb3+ and M-Si-Eu3+) and studied their photoluminescence properties. The fibrous membranes containing the rare earth complexes were prepared by electrospinning. The surface morphology and thermal properties of the fibrous membrane were studied by atomic force microscopy (AFM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), respectively. Fluorescence spectroscopy was used to characterize the fluorescence properties of the membranes. During the electrospinning process, the PVDF transitions from the α phase to the β phase, which exhibits a more rigid structure. The introduction of rigid materials, like PVDF and silica, can improve the fluorescence properties of the hybrid materials by reducing the rate of nonradiative decay. So the emission spectra at 548 nm (Tb) and 612 nm (Eu) were enhanced, as compared to the emission from the pure complex. Furthermore, the fluorescence lifetimes ranged from 0.6 to 1.5 ms and the quantum yields ranged from 32% to 61%. The luminescent fibrous membranes have potential applications in the fields of display panels, innovative electronic and optoelectronic devices.

Novel highly aligned, double-layered, hollow fibrous polycarbonate membranes with a perfectly tightly packed pentagonal pore structure fabricated using the electrospinning process

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 88857-88865 ◽  
Author(s):  
Yun-Shao Huang ◽  
Chi-Ching Kuo ◽  
Chun-Chun Huang ◽  
Shin-Cheng Jang ◽  
Wen-Chin Tsen ◽  
...  
Keyword(s):  
Pore Structure ◽  
Mixed Layer ◽  
Electrospinning Process ◽  
Coaxial Electrospinning ◽  
Polycarbonate Membranes ◽  
Fibrous Membranes ◽  
Two Fluid

Highly aligned, tightly packed, single-, double-, and mixed-layer polycarbonate (PC) hollow fibrous membranes were prepared using two-fluid coaxial electrospinning.

scholarly journals Effects of Montmorillonite and Gentamicin Addition on the Properties of Electrospun Polycaprolactone Fibers

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6905
Author(s):  
Ewa Stodolak-Zych ◽  
Roksana Kurpanik ◽  
Ewa Dzierzkowska ◽  
Marcin Gajek ◽  
Łukasz Zych ◽  
...  
Keyword(s):  
Fibrous Composite ◽  
Grain Morphology ◽  
Nonwoven Fabric ◽  
Interplanar Distance ◽  
Electrospinning Process ◽  
Release Time ◽  
Electrospinning Technique ◽  
Gentamicin Sulfate ◽  
Gentamicin Sulphate ◽  
Fibrous Membranes

Electrospinning was used to obtain multifunctional fibrous composite materials with a matrix of poly-ɛ-caprolactone (PCL) and 2 wt.% addition of a nanofiller: montmorillonite (MMT), montmorillonite intercalated with gentamicin sulphate (MMTG) or gentamicin sulphate (G). In the first stage, the aluminosilicate gallery was modified by introducing gentamicin sulfate into it, and the effectiveness of the intercalation process was confirmed on the basis of changes in the clay particle size from 0.5 µm (for MMT) to 0.8 µm (for MMTG), an increase in the interplanar distance d001 from 12.3 Å (for MMT) to 13.9 Å (for MMTG) and altered clay grain morphology. In the second part of the experiment, the electrospinning process was carried out in which the polymer nonwovens with and without the modifier were prepared directly from dichloromethane (DCM) and N,N-dimethylformamide (DMF). The nanocomposite fibrous membranes containing montmorillonite were prepared from the same polymer solution but after homogenization with the modifier (13 wt.%). The degree of dispersion of the modifier was evaluated by average microarray analysis from observed area (EDS), which was also used to determine the intercalation of montmorillonite with gentamicin sulfate. An increase in the size of the fibers was found for the materials with the presence of the modifier, with the largest diameters measured for PCL_MMT (625 nm), and the smaller ones for PCL_MMTG (578 nm) and PCL_G (512 nm). The dispersion of MMT and MMTG in the PCL fibers was also confirmed by indirect studies such as change in mechanical properties of the nonwovens membrane, where the neat PCL nonwoven was used as a reference material. The addition of the modifier reduced the contact angle of PCL nonwovens (from 120° for PCL to 96° for PCL_G and 98° for PCL_MMTG). An approximately 10% increase in tensile strength of the nonwoven fabric with the addition of MMT compared to the neat PCL nonwoven fabric was also observed. The results of microbiological tests showed antibacterial activity of all obtained materials; however, the inhibition zones were the highest for the materials containing gentamicin sulphate, and the release time of the active substance was significantly extended for the materials with the addition of montmorillonite containing the antibiotic. The results clearly show that the electrospinning technique can be effectively used to obtain nanobiocomposite fibers with the addition of nonintercalated and intercalated montmorillonite with improved strength and increased stiffness compared to materials made only of the polymer fibers, provided that a high filler dispersion in the spinning solution is obtained.

scholarly journals Reuse of Textile Waste to Production of the Fibrous Antibacterial Membrane with Filtration Potential

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 50
Author(s):  
Alena Opálková Šišková ◽  
Pavel Pleva ◽  
Jakub Hrůza ◽  
Jaroslava Frajová ◽  
Jana Sedlaříková ◽  
...  
Keyword(s):  
Water Vapor ◽  
Water Vapor Permeability ◽  
Hydrophobic Surface ◽  
Filtration Efficiency ◽  
Electrospinning Process ◽  
Fibrous Membrane ◽  
Vapor Permeability ◽  
Bacterial Strains ◽  
Textile Waste ◽  
Fibrous Membranes

Wasted synthetic fabrics are a type of textile waste source; the reuse of them brings environmental protection and turns waste into a valuable material. In this work, the used nylon (polyamide) stockings were transmuted into a fine fibrous membrane via an electrospinning process. In addition, the safety antibacterial agent, monoacylglycerol (MAG), was incorporated into a recycled fibrous membrane. The results revealed that the neat, recycled polyamide (rPA) fibers with a hydrophobic surface could be converted into hydrophilic fibers by blending various amounts of MAG with rPA solution prior to electrospinning. The filtration efficiency and air/water vapor permeability of the two types of produced membranes, neat rPA, and rPA/MAG, were tested. Their filtration efficiency (E100) was more than 92% and 96%, respectively. The membranes were classified according to Standard EN1822, and therefore, the membranes rPA and rPA/MAG were assigned to the classes E10 and E11, respectively. The air permeability was not affected by the addition of MAG, and water vapor permeability was slightly enhanced. Based on the obtained data, prepared rPA/MAG fibrous membranes can be evaluated as antifouling against both tested bacterial strains and antimicrobial against S. aureus.

Performance and drug release studies of poly (ɛ-caprolactone)/γ-poly (glutamic acid) fibrous membranes

2018 ◽  
Vol 89 (9) ◽  
pp. 1642-1657 ◽  
Author(s):  
Henan Zhan ◽  
Shan Liu ◽  
Xiyu Hu ◽  
Dong Jiang
Keyword(s):  
Drug Release ◽  
Water Solubility ◽  
Fiber Strength ◽  
Composite Membranes ◽  
Controlled Drug Release ◽  
Electrospinning Process ◽  
In Vitro Dissolution ◽  
Scanning Calorimetry ◽  
Fibrous Membranes

Fibrous membranes of poly(ɛ-caprolactone)/γ-poly(glutamicacid) (PCL/γ-PGA) composites were successfully produced via an electrospinning process. In doing so, the water solubility of florfenicol (FF) could be enhanced and the drug release properties of FF could be controlled. The mechanical, morphologic, and thermal properties of the fibrous membranes of PCL/γ-PGA were studied by using an electronic single fiber strength machine, scanning electron microscopy, and differential scanning calorimetry. The wettability of the fibrous membranes of PCL/γ-PGA was also measured as discussed in the subsequent section. Fourier transform infrared spectroscopy was applied in the structural analysis of the PCL/γ-PGA-FF fibrous membranes. The results indicated that FF was well blended in the composite membranes of PCL/γ-PGA. In vitro dissolution tests showed that PCL/γ-PGA (85/15; 8%) as both a biodegradable and biocompatible blend may improve the solubility of FF. Therefore, fibrous membranes of PCL/γ-PGA may represent ideal materials for the controlled drug release in various clinical applications.

Effect of Solution Properties and Operating Parameters on Needleless Electrospinning of Poly(Ethylene Oxide) Nanofibers Loaded with Bovine Serum Albumin

2019 ◽  
Vol 16 (10) ◽  
pp. 913-922 ◽  
Author(s):  
Ramprasath Ramakrishnan ◽  
Jolius Gimbun ◽  
Praveen Ramakrishnan ◽  
Balu Ranganathan ◽  
Samala Murali Mohan Reddy ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Salt Content ◽  
Electrospinning Process ◽  
Solution Viscosity ◽  
Operating Parameters ◽  
Solution Properties ◽  
Wire Electrode ◽  
Needleless Electrospinning

Background: This paper presents the effect of solution properties and operating parameters of polyethylene oxide (PEO) based nanofiber using a wire electrode-based needleless electrospinning. Methods: The feed solution was prepared using a PEO dissolved in water or a water-ethanol mixture. The PEO solution is blended with Bovine Serum Albumin protein (BSA) as a model drug to study the effect of the electrospinning process on the stability of the loaded protein. The polymer solution properties such as viscosity, surface tension, and conductivity were controlled by adjusting the solvent and salt content. The morphology and fiber size distribution of the nanofiber was analyzed using scanning electron microscopy. Results: The results show that the issue of a beaded nanofiber can be eliminated either by increasing the solution viscosity or by the addition of salt and ethanol to the PEO-water system. The addition of salt and solvent produced a high frequency of smaller fiber diameter ranging from 100 to 150 nm. The encapsulation of BSA in PEO nanofiber was characterized by three different spectroscopy techniques (i.e. circular dichroism, Fourier transform infrared, and fluorescence) and the results showed the BSA is well encapsulated in the PEO matrix with no changes in the protein structure. Conclusion: This work may serve as a useful guide for a drug delivery industry to process a nanofiber at a large and continuous scale with a blend of drugs in nanofiber using a wire electrode electrospinning.

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