Preparation and characterization of water-absorbing gas-assisted electrospun nanofibers based on poly(vinyl alcohol)/chitosan

2020 ◽  
Vol 25 ◽  
pp. 101489 ◽  
Author(s):  
Mohsen Sazegar ◽  
Saeed Bazgir ◽  
Ali Asghar Katbab
Keyword(s):  
Vinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol

Preparation and characterization of gatifloxacin-loaded alginate/poly (vinyl alcohol) electrospun nanofibers

2014 ◽  
pp. 1-6 ◽  
Author(s):  
Saravanakumar Arthanari ◽  
Ganesh Mani ◽  
Jun Ho Jang ◽  
Je O Choi ◽  
Yun Ho Cho ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol

scholarly journals Antibacterial Activity and Drug Loading of Moxifloxacin-Loaded Poly(Vinyl Alcohol)/Chitosan Electrospun Nanofibers

2021 ◽  
Vol 8 ◽  
Author(s):  
Qi Liu ◽  
Wen-Chong Ouyang ◽  
Xiu-Hong Zhou ◽  
Tao Jin ◽  
Zheng-Wei Wu
Keyword(s):  
Antibacterial Activity ◽  
Vinyl Alcohol ◽  
Composite Nanofibers ◽  
Drug Loading ◽  
Antibacterial Properties ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Blank Group

In this study, nanofibers with different ratios of poly(vinyl alcohol) and chitosan incorporated with moxifloxacin hydrochloride (MH/PVA/CS) were fabricated through the blending electrospinning, and the morphological features were tested using scanning electron microscopy (SEM). Further characterization of the new nanofiber was accomplished by Thermogravimetric analysis (TG), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Antibacterial activity of the MH-loaded nanofibers at different drug loading were tested and compared with the blank group. Experimental results show that the MH/PVA/CS nanofibers exhibited the good antibacterial properties against Staphylococcus aureus and Pseudomonas aeruginosa due to the MH incorporation. Compared with blank nanofibers, MH/PVA/CS nanofibers have significantly better antibacterial properties, and different proportions of PVA and CS have a certain effect on the antibacterial activity of nanofibers. The conclusions in this paper show that MH/PVA/CS composite nanofibers may have great potential in antibacterial materials.

scholarly journals Fabrication and Characterization of Electrospun Wool Keratin/Poly(vinyl alcohol) Blend Nanofibers

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Shuai Li ◽  
Xu-Hong Yang
Keyword(s):  
Tensile Test ◽  
Vinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Electrospinning Method ◽  
Wool Keratin

Wool keratin/poly(vinyl alcohol) (PVA) blend nanofibers were fabricated using the electrospinning method in formic acid solutions with different weight ratios of keratin to PVA. The resultant blend nanofibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), and tensile test. SEM images showed that the diameter of the blend nanofibers was affected by the content of keratin in blend solution. FTIR and XRD analyses data demonstrated that there were good interactions between keratin and PVA in the blended nanofibers caused by possibly hydrogen bonds. The TGA study revealed that the thermal stability of the blend nanofibers was between those of keratin and PVA. Tensile test indicated that the addition of PVA was able to improve the mechanical properties of the electrospun nanofibers.

scholarly journals Preparation and characterization of naftifine-loaded poly(vinyl alcohol)/sodium alginate electrospun nanofibers

2020 ◽  
Vol 56 ◽  
Author(s):  
İmren Esentürk ◽  
Timuçin Balkan ◽  
Sevgi Güngör ◽  
Sezai Saraç ◽  
Meryem Sedef Erdal
Keyword(s):  
Sodium Alginate ◽  
Vinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol

scholarly journals Adsorption of tetracycline from water using glutaraldehyde-crosslinked electrospun nanofibers of chitosan/poly(vinyl alcohol)

2018 ◽  
Vol 77 (5) ◽  
pp. 1324-1335 ◽  
Author(s):  
Aliyeh Yousefi Abdolmaleki ◽  
Hamid Zilouei ◽  
Saied Nouri Khorasani ◽  
Kiomars Zargoosh
Keyword(s):  
Vinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Injection Flow ◽  
Before And After ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

Abstract In this work, the preparation and characterization of glutaraldehyde-crosslinked electrospun nanofibers of chitosan/poly(vinyl alcohol) (GCCPN) as a new adsorbent for tetracycline (TC) is reported. Electrospun nanofibers of chitosan/poly(vinyl alcohol) (PVA) were prepared by employing a 75:25 volumetric ratio of chitosan:PVA, voltage of 30 kV, collection distance of 10 cm, and injection flow rate of 2 mL/h. Then, the nanofibers were crosslinked via applying the glutaraldehyde on them for 3 h at 40 °C. The nanofibers were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction. Uniform beadless nanofibers with minimum diameters of 3–11 and 6–18 nm were obtained before and after crosslinking, respectively. Then the applicability of the synthesized GCCPN for removal of TC from aqueous solutions was investigated. The response surface method was applied to evaluate the influence of pH (6–12), TC concentration (50–250 mg/L) and the adsorbent dose (0.05–0.25 g in 20 mL solution) on the adsorption characteristics of GCCPN. The maximum adsorption capacity was 102 mg/g. The adsorption kinetics was explained most effectively by the pseudo-second-order model. The adsorption data of TC on the GCCPN surface was explained well by the Langmuir isotherm model.

Preparation and characterization of poly(vinyl alcohol)/gum tragacanth/cellulose nanocomposite film

2021 ◽  
pp. 50672
Author(s):  
Majid Alizadeh Moghadam ◽  
Reza Mohammadi ◽  
Ehsan Sadeghi ◽  
Mohammad Amin Mohammadifar ◽  
Mohammad Nejatian ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Nanocomposite Film ◽  
Poly Vinyl Alcohol ◽  
Gum Tragacanth

scholarly journals Equilibrium, Thermodynamic, Reuse, and Selectivity Studies for the Bioadsorption of Lanthanum onto Sericin/Alginate/Poly(vinyl alcohol) Particles

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 623
Author(s):  
Talles Barcelos da Costa ◽  
Meuris Gurgel Carlos da Silva ◽  
Melissa Gurgel Adeodato Vieira
Keyword(s):  
Vinyl Alcohol ◽  
Economic Value ◽  
Poly Vinyl Alcohol ◽  
Thermodynamic Quantities ◽  
High Demand ◽  
Batch System ◽  
Equilibrium Data ◽  
Selectivity Studies ◽  
Amorphous Character

In a scenario of high demand, low availability, and high economic value, the recovery of rare-earth metals from wastewater is economically and environmentally attractive. Bioadsorption is a promising method as it offers simple design and operation. The aim of this study was to investigate lanthanum bioadsorption using a polymeric bioadsorbent of sericin/alginate/poly(vinyl alcohol)-based biocomposite. Batch system assays were performed to evaluate the equilibrium, thermodynamics, regeneration, and selectivity of bioadsorption. The maximum capture amount of lanthanum at equilibrium was 0.644 mmol/g at 328 K. The experimental equilibrium data were better fitted by Langmuir and Dubinin–Radushkevich isotherms. Ion exchange mechanism between calcium and lanthanum (2:3 ratio) was confirmed by bioadsorption isotherms. Thermodynamic quantities showed that the process of lanthanum bioadsorption was spontaneous (−17.586, −19.244, and −20.902 kJ/mol), endothermic (+15.372 kJ/mol), and governed by entropic changes (+110.543 J/mol·K). The reusability of particles was achieved using 0.1 mol/L HNO3/Ca(NO3)2 solution for up to five regeneration cycles. The bioadsorbent selectivity followed the order of lanthanum > cadmium > zinc > nickel. Additionally, characterization of the biocomposite prior to and post lanthanum bioadsorption showed low porosity (9.95 and 12.35%), low specific surface area (0.054 and 0.019 m2/g), amorphous character, and thermal stability at temperatures up to 473 K. This study shows that sericin/ alginate/poly(vinyl alcohol)-based biocomposites are effective in the removal and recovery of lanthanum from water.

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