Solution electrospinning of particle-polymer composite fibres

Christiansen, Lasse; Fojan, Peter

doi:10.1051/mfreview/2016013

Cited by 6 publications

(8 citation statements)

References 20 publications

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“…When the particles are too large, the fibers after electrospinning are not formed instead of that it is pulled out or broken (Figure S4, Supporting Information). [ 42 ] Therefore, relatively small sized particles were chosen to prepare the fibers.…”

Section: Resultsmentioning

confidence: 99%

Efficient Daytime Radiative Cooling Cover Sheet with Dual‐Modal Optical Properties

Son

Lee

Chae

et al. 2022

Advanced Optical Materials

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large heat source. The detailed principle is shown in the supporting information section. The material on which sunlight are incident should reflect light in the solar spectrum (0.3-2.5 µm) and emit/absorb light in the ATW region (8-13 µm). [5][6][7][8] Radiative cooling emitters have been developed using various materials, such as polymers, [9][10][11] inorganic particles, [12][13][14] metals, [15][16][17] and structures [18][19][20] such as meta-structures, [6,21,22] thin films, [23][24][25][26] and sheets. [13,[27][28][29][30][31][32][33] Fan et al. studied daytime radiative cooling based on a photonic structure having multiple dielectric layers on a silver-mirror-deposited substrate. [15] This photonic-structured radiative cooler showed high solar reflection and selective IR emissivity, exhibiting a cooling power of 40.1 W m −2 and a drop temperature of 4.9 °C. These complex types of radiative cooling emitter including precious metals, photonic structures, thin films, and multi-layered photonic structures cannot be easily applied to industry due to the limitations of fabrication, practicality, and compatibility in exterior wall. Yin et al. reported a scalable demonstration of a hybrid metamaterial comprising a polymer (polymethylpentene, TPX) and microdielectric particles (SiO 2 ) that can strongly reflect solar irradiation and exhibit a nearly saturated emissivity of 0.93 in the IR region. [34] This metamaterial yielded a cooling power of 93 W m −2 . Han et al. [35] and Lee et al. [36] introduced an effective and scalable paint-format radiative cooling material made of a microparticle-polymer composite. These special cooling paints have high solar reflection and broadband IR emissivity, exhibiting cooling temperatures of 4.7 and 7.9 °C, respectively. Although the paint-format radiative cooling material may be advantageous for applications in architecture, such as buildings and automobiles, the process of coating directly on the exterior wall of buildings is burdensome because the coating process is undetachable and is not possible to be applicated at a certain time or period of cooling, resulting in a narrow application field. Therefore, a flexible freestanding-substrate and coating-film, such as in the form of cover sheets and films, would be a more favorable design due to its straightforward application. The form of the sheet can be easily applied to fields requiring cooling in a detachable and covering manner on the surface of a material that demands cooling only for a specific time or period. Zhu et al. introduced a scalable and flexible radiative cooling film with poly(vinylidene fluoride) (diameter range of 0.5-2.5 µm) and alumina fiber. [37] This film showed a high Daytime radiative cooling is an eco-friendly cooling technique that does not consume additional fuel and is a promising technology now being developed using various materials and methods. Existing radiative cooling emitters are typically in the form of multilayered or mixed thin films and photonic structures, which are difficult to apply in...

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Section: Resultsmentioning

confidence: 99%

Efficient Daytime Radiative Cooling Cover Sheet with Dual‐Modal Optical Properties

Son

Lee

Chae

et al. 2022

Advanced Optical Materials

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“…According to the literature, the most common encapsulation techniques are spherical encapsulation and encapsulation in fiber matrices [17][18][19]. The innovative encapsulation of PCM in the core of electrospun fibers is achieved through co-axial electrospinning.…”

Section: Pcm Electrospun Fiber Matrixmentioning

confidence: 99%

Thermal Analysis of Organic and Nanoencapsulated Electrospun Phase Change Materials

et al. 2021

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Latent heat stored in phase change materials (PCM) can greatly improve energy efficiency in indoor heating/cooling applications. This study presents the materials and methods for the formation and characterization of a PCM layer for a latent heat thermal energy storage (LHTES) application. Four commercially available PCMs comprising the classes of organic paraffins and organic non-paraffins were selected for thermal storage application. Pure organic PCM and PCM in water emulsions were experimentally investigated. PCM electrospun microfibers were produced by a co-axial electrospinning technique, where solutions of Polycaprolactone (PCL) 9% w/v and 12% w/v in dichloromethane (DCM) were used as the fiber shell materials. PCM emulsified with sodium dodecyl sulfate (SDS), and Polyvinylalcohol 10% w/v (PVA) constituted the core of the fibers. The thermal behavior of the PCM, PCM emulsions, and PCM electrospun fibers were analyzed with differential scanning calorimetry (DSC). A commercial organic paraffin with a phase change temperature of 18 °C (RT 18) in its pure and emulsified forms was found to be a suitable PCM candidate for LHTES. The PVA-PCM electrospun fiber matrix of the organic paraffin RT18 with a PCL concentration of 12% w/v showed the most promising results leading to an encapsulation efficiency of 67%.

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“…In the past, several efforts to electrospin advanced composite materials [ 6 , 7 , 8 ], and to upscale the process to an industrial scale [ 9 , 10 ], have been made. Among these types of advanced materials [ 8 , 11 , 12 , 13 ] are aerogel/polymer composite fibers, described earlier by this group [ 14 , 15 ]. Such materials allow for a combination of the incredible thermal insulation properties of silica-based aerogel and the mechanical strength and ease of handling of polymer fibers.…”

Section: Introductionmentioning

confidence: 99%

“…The present study reports a novel method for pneumatic transport of particulate matter into the core of melt electrospun fibers. Up until now, this has only been demonstrated for solvent electrospinning [ 14 , 15 ]. Melt electrospinning, on the other hand, offers solvent- free fiber formation, allowing the incorporation of dry porous particles without residual solvent, and avoiding their collapse due to solvent wetting.…”

Section: Introductionmentioning

confidence: 99%

Melt Electrospinning of PET and Composite PET-Aerogel Fibers: An Experimental and Modeling Study

et al. 2021

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Increasingly advanced applications of polymer fibers are driving the demand for new, high-performance fiber types. One way to produce polymer fibers is by electrospinning from polymer solutions and melts. Polymer melt electrospinning produces fibers with small diameters through solvent-free processing and has applications within different fields, ranging from textile and construction, to the biotech and pharmaceutical industries. Modeling of the electrospinning process has been mainly limited to simulations of geometry-dependent electric field distributions. The associated large change in viscosity upon fiber formation and elongation is a key issue governing the electrospinning process, apart from other environmental factors. This paper investigates the melt electrospinning of aerogel-containing fibers and proposes a logistic viscosity model approach with parametric ramping in a finite element method (FEM) simulation. The formation of melt electrospun fibers is studied with regard to the spinning temperature and the distance to the collector. The formation of PET-Aerogel composite fibers by pneumatic transport is demonstrated, and the critical parameter is found to be the temperature of the gas phase. The experimental results form the basis for the electrospinning model, which is shown to reproduce the trend for the fiber diameter, both for polymer as well as polymer-aerogel composites.

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Solution electrospinning of particle-polymer composite fibres

Cited by 6 publications

References 20 publications

Efficient Daytime Radiative Cooling Cover Sheet with Dual‐Modal Optical Properties

Efficient Daytime Radiative Cooling Cover Sheet with Dual‐Modal Optical Properties

Thermal Analysis of Organic and Nanoencapsulated Electrospun Phase Change Materials

Melt Electrospinning of PET and Composite PET-Aerogel Fibers: An Experimental and Modeling Study

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