Effect of flow rate on wetting and optical properties of electrospun poly(vinyl acetate) micro-fibers

Açık, Gökhan; Cansoy, C. Elif; Kamacı, Musa

doi:10.1007/s00396-018-4443-3

Cited by 40 publications

(28 citation statements)

References 44 publications

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“…The increase in the concentration of spinning solution leads to the formation of higher viscosity and consequently to the increased entanglement between the polymer chains and to the formation of beadless fibers up to the critical value. As expected, we observed that with the increased concentration from 200 to 250 mg m −1 and feed rate ranging from 1.0 to 2.0 mL h −1 , the contact angle between the water droplet and fiber surfaces linearly increased from 128° ± 1.1 to 139° ± 1.5, probably due to increase in surface roughness . On the other hand, the increased solution concentration and the resulting viscosity increase or increased feed rate have been associated with the production of larger diameter fibers.…”

Section: Resultssupporting

confidence: 79%

Polypropylene microfibers via solution electrospinning under ambient conditions

Açık

Altınkök

2019

J of Applied Polymer Sci

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Uniform beadless fibers of chlorinated polypropylene (PP-Cl) are prepared by electrospinning of PP-Cl solutions in tetrahydrofuran at different concentrations, feed rates, applied voltages, and tip-to-collector distances (TCDs) under ambient conditions for the first time. Average fiber diameter and morphology of the electrospun PP-Cl fibers are determined by scanning electron microscopy. On the other hand, the wettability of the fibers is examined by water contact angle (WCA) measurements. Furthermore, thermal behavior of fibers is investigated by differential scanning calorimetry and thermogravimetric analyses, respectively. Obtained results show that the higher concentrations and feed rates of polymer solutions not only enhance the average diameter of the electrospun fibers ranging from 2.2 AE 0.5 to 2.8 AE 0.3 μm but improve the hydrophobicity of the fiber surfaces from 128 AE 1.1 to 141 AE 1.0 as well. On the other hand, when applied voltage is increased or TCD is decreased, diameters of achieved fibers are enhanced. It is suggested that PP-Cl is an useful material for solution electrospinning process at under ambient conditions, exhibiting great scientific merit and good industrial expectation in the potential PP applications.

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Section: Resultssupporting

confidence: 79%

Polypropylene microfibers via solution electrospinning under ambient conditions

Açık

Altınkök

2019

J of Applied Polymer Sci

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“…The surface free energy of hydrogels was calculated by using van Oss‐Chaudhury‐Good equation . Surface free energy of hydrogels I‐III was calculated as 16.95, 26.22, and 33.08 J/m 2 , respectively, and the surface free energy of the hydrogels was inversely changed with CA value.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…An average CA value was calculated from three points on each surface. CA was also measured using different liquids such as EG, DIM, water, and FA to calculate surface free energy and this energy of hydrogels was determined via van Oss Good-Chaudhury equation 30,31. 2.6 | Swelling studiesThe swelling properties of PAMU-and CS-based hydrogels were evaluated using a gravimetric method at pH = 3, 7, and 12.…”

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confidence: 99%

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Biodegradable and antibacterial poly(azomethine‐urethane)‐chitosan hydrogels for potential drug delivery application

Kamacı

Kaya

2020

Polymers for Advanced Techs

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In this study, biodegradable and antibacterial poly(azomethine‐urethane) (PAMU)‐ and chitosan (CS)‐based hydrogels have been prepared for controlled drug delivery applications. Structural and morphological characterizations of the hydrogels were performed via Fourier transform‐infrared and scanning electron microscopy analyses. Thermal stability, hydrophilicity, swelling, mechanical, biodegradation, protein absorption properties, and drug delivery application of PAMU‐ and CS‐based hydrogels were also investigated. The swelling performance of the hydrogels was studied in acidic, neutral, and alkaline media. Swelling results showed that the hydrogels have higher swelling capacity in acidic and alkaline media than neutral medium. Biodegradation experiments of the hydrogels were also studied via hydrolytic and enzymatic experiments. The drug release property of the hydrogel was carried out using 5‐fluoro uracil (5‐FU), and 5‐FU release capacity of the hydrogels was found in the range from 40.10% to 58.40% after 3 days.

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“…It is worth mentioning that the surface morphology and properties of electrospun fibers can be affected by (I) the working parameters of the electrospinning process represented by ambient parameters (relative humidity and temperature), solution parameters (polymer concentration, molecular weight, viscosity, conductivity, and surface tension), and processing parameters (flow rate, applied voltage, distance between the tip of the needle and the collector [DTC], collector type, and diameter of the needle); (II) electrospinning types; (III) composites; and (IV) postprocessing treatments …”

Section: Brief Introduction Of Electrospinningmentioning

confidence: 99%

A mini review on the generation of crimped ultrathin fibers via electrospinning: Materials, strategies, and applications

Zaarour

Zhu

Huang

et al. 2020

Polymers for Advanced Techs

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Structures modification of fibers has been attracting significant attention in various fields and applications. Among different techniques of fabricating ultrathin fibers, electrospinning is the most commonly adopted method because of the ease of forming fibers with a wide range of properties and its exceptional advantages, such as the ability to spin into different shapes and sizes, as well as the adaptable porosity of electrospun fiber webs. The crimped structure has been attracting the attention of scientific researchers owing to its unique properties (eg, spring-like behavior, supreme strain, remarkable specific surface area, good piezoelectric properties, excellent biological properties, and so on). Therefore, this study summarizes a review of the strategies and methods, reported so far, of generating electrospun crimped ultrathin fibers of various polymers. The review focuses on the polymer types, formation methods, characterizations, and applications of the electrospun crimped ultrathin fibers. We believe this work can serve as an important reference for the materials, strategies, and applications of crimped fibers.

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Effect of flow rate on wetting and optical properties of electrospun poly(vinyl acetate) micro-fibers

Cited by 40 publications

References 44 publications

Polypropylene microfibers via solution electrospinning under ambient conditions

Polypropylene microfibers via solution electrospinning under ambient conditions

Biodegradable and antibacterial poly(azomethine‐urethane)‐chitosan hydrogels for potential drug delivery application

A mini review on the generation of crimped ultrathin fibers via electrospinning: Materials, strategies, and applications

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