Fabrication of Porous Phenyl Silsesquiazane and Poly(ethylene oxide) Nanofibers by Electrospinning and Nonsolvent-induced Phase Separation

Kang, Mun Gu; Kim, Il Won; Lee, Yunsang; Kwark, Young‐Je

doi:10.1007/s12221-023-00118-7

Cited by 3 publications

(2 citation statements)

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“…Phase separation, a critical phenomenon in this context, can occur due to the demixing of polymer and solvent in the liquid jet, especially during solvent evaporation . The employment of volatile solvents has proven effective in creating highly porous fibers. , Another prevalent technique is the nonsolvent-induced phase separation (NIPS), where introducing a nonsolvent incapable of dissolving the polymer induces phase separation, resulting in polymer-rich and polymer-lean domains. − This process, coupled with the rapid solvent evaporation under high-charge conditions in electrospinning, leads to the formation of intrafiber pores . Moreover, ambient relative humidity has been identified as a critical factor influencing the quality and morphology of electrospun fibers.…”

Section: Introductionmentioning

confidence: 99%

“… 23 , 24 Another prevalent technique is the nonsolvent-induced phase separation (NIPS), where introducing a nonsolvent incapable of dissolving the polymer induces phase separation, resulting in polymer-rich and polymer-lean domains. 25 − 27 This process, coupled with the rapid solvent evaporation under high-charge conditions in electrospinning, leads to the formation of intrafiber pores. 28 Moreover, ambient relative humidity has been identified as a critical factor influencing the quality and morphology of electrospun fibers.…”

Section: Introductionmentioning

confidence: 99%

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Heat’s Role in Solution Electrospinning: A Novel Approach to Nanofiber Structure Optimization

Wildy,

Wei,

et al. 2024

Langmuir

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In this study, we explored an innovative application of heat-assisted solution electrospinning, a technique that significantly advances the control of phase separation in polystyrene (PS) fibers. Our experimental approach involved the use of direct heating and a convection air sheath applied through a coaxial needle, focusing on solvents with varying vapor pressures. This method enabled a detailed investigation into how solvent evaporation rates affect the morphology of the electrospun fibers. SEM and AFM measurements revealed that the application of direct heating and a heated air sheath offered precise control over the fiber morphology, significantly influencing both the surface and internal structure of the fibers. Additionally, we observed notable changes in fiber diameter, indicating that heat-assisted electrospinning can be effectively utilized to tailor fiber dimensions according to specific application requirements. Moreover, our research demonstrated the critical role of solvent properties, particularly vapor pressure, in determining the final characteristics of the electrospun fibers. By comparing fibers produced with different solvents, we gained insights into the complex interplay between solvent dynamics and heat application in fiber formation. The implications of these findings are far-reaching, offering new possibilities for the fabrication of nanofibers with customized properties. Furthermore, this could have profound impacts on various applications, from biomedical to environmental, where specific fiber characteristics are crucial. This study not only contributes to the understanding of phase separation in electrospinning but also opens avenues for further research on the optimization of fiber properties for diverse industrial and scientific applications.

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