Investigation of pore formation for polystyrene electrospun fiber: Effect of relative humidity

Kim, Gil-Tae; Lee, Jung Hoon; Shin, Jungho; Ahn, Young-Chull; Hwang, Yujin; Shin, Heesoo; Lee, Jae-Keun; Sung, Changmo

doi:10.1007/bf02705799

Cited by 48 publications

(37 citation statements)

References 9 publications

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“…The morphological characteristics of a nanocomposite fibre, such as fibre diameter and bead structures, are important in certain applications due to their effects on the porosity of the resultant structure. Various processing and material parameters have been introduced to control the morphological variations of electrospun nanofibres [21][22][23][24][25][26]. These variations can be attributed to three crucial factors; the surface tension, charge density, and viscoelastic behaviour of the solution [27][28].…”

Section: Introductionmentioning

confidence: 99%

Preparation of carbon nanotube embedded in polyacrylonitrile (pan) nanofibre composites by electrospinning process

Pilehrood¹,

Heikkilä²,

Harlin³

2012

Autex Research Journal

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Section: Introductionmentioning

confidence: 99%

Preparation of carbon nanotube embedded in polyacrylonitrile (pan) nanofibre composites by electrospinning process

Pilehrood¹,

Heikkilä²,

Harlin³

2012

Autex Research Journal

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“…Pores formed through TIPS are typically circular since the pores are molded by water droplets. 62,65 A summary of the theories describing formation of pores on hydrophobic polymer fibers is illustrated in Figure 8.…”

Section: Effects Of Humidity and Viscosity On Fiber Morphologymentioning

confidence: 99%

“…The effects of humidity on fiber morphology are poorly understood and/or there are contradictory effects that have been observed that appear to be dependent on properties such as the type of polymer, polymer-solvent combination, molecular weight, polymer hydrophilicity, and size of the electrospun structure. [62][63][64][65][66] Both the incomplete reporting of electrospinning conditions and the limited understanding of environmental effects on fiber formation make it difficult to predict and reproduce electrospun scaffold microarchitecture.…”

Section: Introductionmentioning

confidence: 99%

Effects of Humidity and Solution Viscosity on Electrospun Fiber Morphology

Nezarati

Eifert²,

Cosgriff‐Hernandez³

2013

Tissue Engineering Part C: Methods

342

210

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Electrospinning is a popular technique to fabricate tissue engineering scaffolds due to the exceptional tunability of fiber morphology that can be used to control scaffold mechanical properties, degradation rate, and cell behavior. Although the effects of modulating processing or solution parameters on fiber morphology have been extensively studied, there remains limited understanding of the impact of environmental parameters such as humidity. To address this gap, three polymers (poly(ethylene glycol) [PEG], polycaprolactone [PCL], and poly(carbonate urethane) [PCU]) were electrospun at a range of relative humidities (RH = 5%-75%) and the resulting fiber architecture characterized with scanning electron microscopy. Low relative humidity ( < 50%) resulted in fiber breakage for all three polymers due to decreased electrostatic discharge from the jet. At high relative humidity ( > 50%), three distinct effects were observed based on individual polymer properties. An increase in fiber breakage and loss of fiber morphology occurred in the PEG system as a result of increased water absorption at high relative humidity. In contrast, surface pores on PCL fibers were observed and hypothesized to have formed via vapor-induced phase separation. Finally, decreased PCU fiber collection occurred at high humidity likely due to increased electrostatic discharge. These findings highlight that the effects of relative humidity on electrospun fiber morphology are dependent on polymer hydrophobicity, solvent miscibility with water, and solvent volatility. An additional study was conducted to highlight that small changes in molecular weight can strongly influence solution viscosity and resulting fiber morphology. We propose that solution viscosity rather than concentration is a more useful parameter to report in electrospinning methodology to enable reproduction of findings. In summary, this study further elucidates key mechanisms in electrospun fiber formation that can be utilized to fabricate tissue engineering scaffolds with tunable and reproducible properties.

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“…The morphology and diameter of the resultant nanofibres depend on many parameters. These have been divided into three groups: solution properties, process parameters and ambient conditions [10][11][12] . The optimization of these parameters is significant in order to obtain continuous nanofibres with specific morphology and well-defined physical and mechanical properties, depending on the type of application.…”

Section: Introductionmentioning

confidence: 99%

Electrospun poly lactic acid (PLA) fibres: Effect of different solvent systems on fibre morphology and diameter

Casasola

Thomas

Trybała

et al. 2014

Polymer

298

197

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Investigation of pore formation for polystyrene electrospun fiber: Effect of relative humidity

Cited by 48 publications

References 9 publications

Preparation of carbon nanotube embedded in polyacrylonitrile (pan) nanofibre composites by electrospinning process

Preparation of carbon nanotube embedded in polyacrylonitrile (pan) nanofibre composites by electrospinning process

Effects of Humidity and Solution Viscosity on Electrospun Fiber Morphology

Electrospun poly lactic acid (PLA) fibres: Effect of different solvent systems on fibre morphology and diameter

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