Role of surfactant on inducing specific microdomains of block copolymer: An example case from polystyrene-b-poly(ethylene-co-1-butene)-b-polystyrene (SEBS) electrospun thermoplastic-elastomer fiber containing polyethylene glycol lauryl ether (PGLE)

Rungswang, Wonchalerm; Kotaki, Masaya; Shimojima, Takuma; Kimura, Go; Sakurai, Shinichi; Chirachanchai, Suwabun

doi:10.1016/j.polymer.2014.02.057

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…A rough estimate made by 2D image analysis showed that there was also a consequent pore size reduction following the same trend of fiber diameter. The simple incorporation of additives can change solution properties like viscosity and influence fiber stretching during electrospinning. Similar results on SEBS fiber diameter reduction were reported by Rungswang et al, but in this case with a different additive.…”

Section: Resultsmentioning

confidence: 99%

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Blending and Morphology Control To Turn Hydrophobic SEBS Electrospun Mats Superhydrophilic

Kurusu

Demarquette

2015

Langmuir

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Thermoplastic elastomer SEBS, a triblock copolymer composed of styrene (S) and ethylene-co-butylene (EB) blocks, can be dissolved and processed by electrospinning to produce flexible nonwoven mats that can be interesting for applications like filtration or separation membranes. Controlling surface properties such as hydrophobicity/hydrophilicity is critical to achieving a desired performance. In this study, hydrophobic electrospun SEBS mats were obtained, following which an amphiphilic molecule (Pluronic F127) was solution-blended with SEBS prior to electrospinning, in a bid to produce a hydrophilic membrane. The result was a fast-spreading superhydrophilic mat with thinner fibers that preserved the flexibility of the SEBS. The morphologies of nonwoven mats, flat films (prepared by dip-coating using identical solutions) and of the surface of individual fibers were characterized using different microscopy techniques (optical, scanning electron microscopy and atomic force microscopy). Chemical analysis by X-ray photoelectron spectroscopy (XPS) revealed a large F127 concentration in the outermost surface layer. In addition, an analysis of dip-coated flat films revealed that for 20 wt % of F127, there was a change in the blend morphology from dispersed F127-rich regions in the SEBS matrix to an interconnected phase homogeneously distributed across the film that resembled grain boundaries of micellar crystals. Our results indicated that this morphology change at 20 wt % of F127 also occurred to some extent in the electrospun fibers and this, combined with the large surface area of the mats, led to a drastic reduction in the contact angle and fast water absorption, turning hydrophobic electrospun mats superhydrophilic.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The simple incorporation of additives can change solution properties like viscosity and influence fiber stretching during electrospinning. Similar results on SEBS fiber diameter reduction were reported by Rungswang et al, but in this case with a different additive.…”

Section: Resultsmentioning

confidence: 99%

Blending and Morphology Control To Turn Hydrophobic SEBS Electrospun Mats Superhydrophilic

Kurusu

Demarquette

2015

Langmuir

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show abstract

“…However, it couldn't bring any significant change in the porosity and pore size of the scaffold. The change in fiber diameter was attributed to change in solution property of the electrospun solution after the addition of MSN-Dexa@CS/ PLLA, which increases the viscosity and decreased the electric conductivity of the solution [38].…”

Section: Morphological Analysis Of Scaffoldsmentioning

confidence: 99%

Poly-l-lactic acid scaffold incorporated chitosan-coated mesoporous silica nanoparticles as pH-sensitive composite for enhanced osteogenic differentiation of human adipose tissue stem cells by dexamethasone delivery

Daryasari

Telgerd

Karami

et al. 2019

Artificial Cells, Nanomedicine, and Biotechnology

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Thermoplastic Elastomers and Their Physical Gels Electrospun into Tunable Microfibrous Nonwoven Mats: Structure Formation and Property Enhancement

Shamsi,

Wells,

Yan

et al. 2024

Adv Funct Materials

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Thermoplastic elastomers (TPEs) based on styrenic block copolymers constitute excellent examples of self‐networking macromolecules that are employed in a wide range of contemporary technologies as molded parts. In such applications, these TPEs exist as dense (nonporous) films or other shapes. Here, it is first demonstrated that a series of commercial TPEs possessing comparable compositions can be electrospun from solution to form microfibers that are arranged into nonwoven mats that are breathable. An important consideration for microfiber formation is the copolymer molecular weight, which regulates i) the viscosity of the parent solution prior to electrospinning, ii) the ability of these copolymers to self‐assemble during electrospinning, iii) the microfiber morphology, and iv) the mechanical properties of the resultant microfibers. The addition of a midblock‐selective aliphatic oil to these TPEs yields thermoplastic elastomer gels (TPEGs), wherein the copolymer morphology and mechanical properties become highly composition‐tunable. Electrospinning TPEGs from a binary oil+solvent solution introduces a micelle inversion mechanism that begins with an oil‐rich micellar core and ends with a styrene‐rich micellar core, required for network stabilization, as the solvent dries during microfiber solidification. This work has implications for the production of controllably low‐modulus microfibrous materials possessing modestly improved toughness but exceptional extensibility and enhanced optical transparency.

show abstract

Role of surfactant on inducing specific microdomains of block copolymer: An example case from polystyrene-b-poly(ethylene-co-1-butene)-b-polystyrene (SEBS) electrospun thermoplastic-elastomer fiber containing polyethylene glycol lauryl ether (PGLE)

Cited by 8 publications

References 19 publications

Blending and Morphology Control To Turn Hydrophobic SEBS Electrospun Mats Superhydrophilic

Blending and Morphology Control To Turn Hydrophobic SEBS Electrospun Mats Superhydrophilic

Poly-l-lactic acid scaffold incorporated chitosan-coated mesoporous silica nanoparticles as pH-sensitive composite for enhanced osteogenic differentiation of human adipose tissue stem cells by dexamethasone delivery

Thermoplastic Elastomers and Their Physical Gels Electrospun into Tunable Microfibrous Nonwoven Mats: Structure Formation and Property Enhancement

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