Effect of polymer concentration on the morphology and mechanical characteristics of electrospun cellulose acetate and poly (vinyl chloride) nanofiber mats

Tarus, Bethwel K.; Fadel, Nermin; Al-Oufy, Affaf; Messiry, Magdi El

doi:10.1016/j.aej.2016.04.025

Cited by 198 publications

(137 citation statements)

References 20 publications

Supporting

Mentioning

125

Contrasting

Order By: Relevance

“…As observed in Table , a significant improvement in EB is also achieved by PEPT. EB is important in determining the ability of a material to withstand sudden shocks of a given energy . Table also reveals that the EB of PLA mats is not significantly affected by plasma treatment time and argon gas flow rate.…”

Section: Resultsmentioning

confidence: 90%

“…As such, partial break up of the polymer jet is prevented. The increased polymer chain entanglements with increasing polymer concentration also enable the solvent molecules to be distributed over the entangled polymer molecules leading to the formation of smooth nanofibers and an improved fiber uniformity . The increase in nanofiber diameter with an increase in polymer concentration is then a result of the gradually increasing viscoelastic force that limits the stretching effect of the electrostatic and columbic repulsion forces …”

Section: Resultsmentioning

confidence: 99%

“…Many applications involving the use of nanofibrous mats require adequate mechanical strength . Therefore, mechanical tests are also performed on selected electrospun PLA nanofibers.…”

Section: Resultsmentioning

confidence: 99%

“…The morphology of electrospun nanofibers plays a crucial role in determining the final efficiency of the nanofibers in various applications. For higher efficiency, thin, smooth, continuous, and bead‐free nanofibrous mats are desirable . In principle, a number of parameters, which can be categorized into “solution” and “processing” parameters, are believed to affect the electrospinning process and thus the morphology of the resultant nanofibers.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Influence of Pre‐Electrospinning Plasma Treatment on Physicochemical Characteristics of PLA Nanofibers

Rezaei

Planckaert

Vercruysse

et al. 2019

Macro Materials & Eng

View full text Add to dashboard Cite

Morphology, crystallinity, thermal, and mechanical properties of nanofibrous mats are known to highly affect the behavior of these materials in desired applications. In this study, multiple characteristics of poly(lactic acid) (PLA) nanofibrous mats prepared from plasma‐treated pre‐electrospinning solutions are studied as a function of various plasma operational parameters. X‐ray diffraction, differential scanning calorimetry, thermogravimetric analysis, X‐ray photoelectron spectroscopy, scanning electron microscopy, and tensile tests are performed. In addition, the pristine and plasma‐treated PLA solutions are examined with size exclusion chromatography to study the effect of the conducted pre‐electrospinning plasma treatments (PEPT) on the molecular weight of PLA. Aging analysis of the pristine and plasma‐treated solutions is also performed by evaluating the viscosity, conductivity, surface tension, and pH during an aging period of 10 days. To investigate if the results are only affected by the plasma treatment or also affected by the electrospinning, pristine and plasma‐treated PLA cast layers are also analyzed. The results reveal that PEPT preserved the surface chemical composition of the nanofibers and the molecular weight distribution of PLA, while morphology and mechanical properties of the nanofibers are considerably enhanced. Moreover, plasma‐treated polymer solutions resulted in the formation of nicely elongated nanofibers up to 4 days after plasma treatment.

show abstract

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

“…Many applications involving the use of nanofibrous mats require adequate mechanical strength . Therefore, mechanical tests are also performed on selected electrospun PLA nanofibers.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Influence of Pre‐Electrospinning Plasma Treatment on Physicochemical Characteristics of PLA Nanofibers

Rezaei

Planckaert

Vercruysse

et al. 2019

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…Interestingly, one of the elastomers (APS‐25PEG) yielded scaffolds with uniaxial mechanical properties similar to those of the native valve leaflet . Electrospinning also enables the modulation of scaffold mechanical properties by simply changing the polymer formulation parameters (such as polymer concentration and copolymer ratios) . Specifically, the elastomer library developed by our group enabled modulation of three key parameters in the polymer formulation: (a) PEG amount (mole %) in APS‐co‐PEG, (b) ratio between APS‐co‐PEG and PCL, and (c) total polymer concentration.…”

Section: Introductionmentioning

confidence: 99%

Valve leaflet‐inspired elastomeric scaffolds with tunable and anisotropic mechanical properties

Xue

Ravishankar

Zeballos

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

Fibrous scaffolds, which can mimic the elastic and anisotropic mechanical properties of native tissues, hold great promise in recapitulating the native tissue microenvironment. We previously fabricated electrospun fibrous scaffolds made of hybrid synthetic elastomers (poly(1,3‐diamino‐2‐hydroxypropane‐co‐glycerol sebacate)‐co‐poly (ethylene glycol) (APS‐co‐PEG) and polycaprolactone (PCL)) to obtain uniaxial mechanical properties similar to those of human aortic valve leaflets. However, conventional electrospinning process often yields scaffolds with random alignment, which fails to recreate the anisotropic nature of most of the soft tissues such as native heart valves. Inspired by the structure of native valve leaflet, we designed a novel valve leaflet‐inspired ring‐shaped collector to modulate the electrospun fiber alignment and studied the effect of polymer formulation (PEG amount [mole %] in APS‐co‐PEG; ratio between APS‐co‐PEG and PCL; and total polymer concentration) in tuning the biaxial mechanical properties of the fibrous scaffolds. The fibrous scaffolds collected on the ring‐shaped collector displayed anisotropic biaxial mechanical properties, suggesting that their biaxial mechanical properties are closely associated with the fiber alignment in the scaffold. Additionally, the scaffold stiffness was easily tuned by changing the composition and concentration of the polymer blend. Human valvular interstitial cells (hVICs) cultured on these anisotropic scaffolds displayed aligned morphology as instructed by the fiber alignment. Overall, we generated a library of biologically relevant fibrous scaffolds with tunable mechanical properties, which will guide the cellular alignment.

show abstract

Advances in Electrospinning Technique in the Manufacturing Process of Nanofibrous Materials

Castro

Costa

Mei

2020

Electrospun Materials and Their Allied Applications

View full text Add to dashboard Cite

Effect of polymer concentration on the morphology and mechanical characteristics of electrospun cellulose acetate and poly (vinyl chloride) nanofiber mats

Cited by 198 publications

References 20 publications

The Influence of Pre‐Electrospinning Plasma Treatment on Physicochemical Characteristics of PLA Nanofibers

The Influence of Pre‐Electrospinning Plasma Treatment on Physicochemical Characteristics of PLA Nanofibers

Valve leaflet‐inspired elastomeric scaffolds with tunable and anisotropic mechanical properties

Advances in Electrospinning Technique in the Manufacturing Process of Nanofibrous Materials

Contact Info

Product

Resources

About