Physical characterization of electrospun nanofibers

Zhu, Jiadeng; Ge, Yeqian; Jasper, S.; Zhang, Xiangwu

doi:10.1016/b978-0-08-100907-9.00009-x

Cited by 15 publications

(13 citation statements)

References 48 publications

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“…Polymer macromolecule extension and entanglement vary between dilute, semi-dilute unentangled, and semi-dilute entangled polymer concentration regimes [ 35 , 38 ]. In principle, low to no interaction between polymer chains leads to spraying and solidification of the solution droplets as polymer film on the surface of the collector (dilute regime), low interaction and entanglement between macromolecules cause so-called beads to appear in the fiber network (semi-dilute unentangled regime) [ 39 ], and high macromolecular entanglement in the polymer solution causes the fiber formation process to stabilize and yield uniform fibers [ 40 , 41 ]. Critical values limiting these regimes constitute a so-called spinnability window, or a set of conditions where uniform fiber spinning should be possible.…”

Section: Introductionmentioning

confidence: 99%

Solution Blow Spinning of Polycaprolactone—Rheological Determination of Spinnability and the Effect of Processing Conditions on Fiber Diameter and Alignment

2021

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The growing popularity of solution blow spinning as a method for the production of fibrous tissue engineering scaffolds and the vast range of polymer–solvent systems available for the method raises the need to study the effect of processing conditions on fiber morphology and develop a method for its qualitative assessment. Rheological approaches to determine polymer solution spinnability and image analysis approaches to describe fiber diameter and alignment have been previously proposed, although in a separate manner and mostly for the widely known, well-researched electrospinning method. In this study, a series of methods is presented to determine the processing conditions for the development of submicron fibrous scaffolds. Rheological methods are completed with extensive image analysis to determine the spinnability window for a polymer–solvent system and qualitatively establish the influence of polymer solution concentration and collector rotational speed on fiber morphology, diameter, and alignment. Process parameter selection for a tissue engineering scaffold target application is discussed, considering the varying structural properties of the native extracellular matrix of the tissue of interest.

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Section: Introductionmentioning

confidence: 99%

Solution Blow Spinning of Polycaprolactone—Rheological Determination of Spinnability and the Effect of Processing Conditions on Fiber Diameter and Alignment

2021

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“…This method does not require either high temperatures or chemical coagulation. The polymer nanofibers obtained by this process show a high contact area and can be presented under different structures, such as core-sheath and porous, among others (Reneker and Chun, 1996;Zhu et al, 2017;Qin et al, 2018;Bagbi et al, 2019). Its filtration power is excellent, as pointed by Molnár and Mészáros (2020).…”

Section: Electrospinning Processmentioning

confidence: 90%

Polymer Applications for Medical Care in the COVID-19 Pandemic Crisis: Will We Still Speak Ill of These Materials?

Corrêa

2020

Front. Mater.

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As consumption and use increased, the accumulation of urban waste of polymeric origin drew the attention of several sectors, especially that of the organized civil society. Through mobilizations and activism, environmental became more restricted regarding the use and disposal of polymer materials. Plastic bags, tires, disposable cups, plastic straws, PET bottles are some examples of how polymers have had a negative impact to the environment generating pressures around the world to rethink their uses. However, the pandemic crisis that emerged in January, 2020 has reinforced the importance of polymers for contemporary society. If, in the past, consumerism was the driving force behind the application of polymers, nowadays health and medical emergencies are the new forces. The reduction in stocks of medical-hospital supplies and personal protective equipment for health professionals and for the general public caused by the pandemic led to the emergence of alternative production movements based on polymers. Because of those alternatives, which have helped a lot to save and preserve lives, the present work aims to highlight the types of polymers most used during this pandemic period, such as polycarbonate (PC), poly(ethylene terephthalate) (PET) and polypropylene (PP). For this purpose, scientific articles related to the production of masks and other devices having some type of polymer as raw material were analyzed. The present research was based on the first half of 2020, highlighting the countries, the polymer used, and the final product it is intended to.

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“…when Fγ is the surface tension force of the solution, C F is the Coulomb force that arises because of the electric field, and H F is the hydrodynamic force that occurs when the solution is pushed/pressed by the syringe pump [24].…”

Section: Electrospinningmentioning

confidence: 99%

Fabrication of PVA/Carbon-Based Nanofibers Using Electrospinning

Yudoyono¹,

Anggoro²,

Ningsih³

et al. 2021

Nanofibers - Synthesis, Properties and Applications

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Nanofibers are widely used in various fields, including water filtration. In the development of nanofibers as water filtration, a mixture of carbon in a polymer solution is often used. Nanofibers can be made by several methods such as multicomponent fiber spinning techniques, melt blowing, electrospinning. Electrospinning is currently a simple development method but can produce nanofibers with a small fiber diameter, it is easy to develop and many parameters can be controlled. Parameters that affect the results of the nanofibers that are formed include flow rate or syringe pump flow rate and high voltage dc high voltage. Various types of nanofibers can be produced from various types of polymers, both natural polymers and synthetic polymers. Generally, because they have properties and characteristics such as high surface area, small pore size, and the possibility to be developed in various applications. Therefore, this chapter discusses the electrospinning of carbon nanofibers using PVA polymer.

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Physical characterization of electrospun nanofibers

Cited by 15 publications

References 48 publications

Solution Blow Spinning of Polycaprolactone—Rheological Determination of Spinnability and the Effect of Processing Conditions on Fiber Diameter and Alignment

Solution Blow Spinning of Polycaprolactone—Rheological Determination of Spinnability and the Effect of Processing Conditions on Fiber Diameter and Alignment

Polymer Applications for Medical Care in the COVID-19 Pandemic Crisis: Will We Still Speak Ill of These Materials?

Fabrication of PVA/Carbon-Based Nanofibers Using Electrospinning

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