Manufacturing of polymer continuous nanofibers using a novel co-extrusion and multiplication technique

Wang, Jia; Langhe, Deepak; Ponting, Michael; Wnek, Gary E.; Korley, LaShanda T. J.; Baer, E.

doi:10.1016/j.polymer.2013.12.025

Cited by 71 publications

(71 citation statements)

References 42 publications

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“…It is a synthetic semicrystalline polyester with excellent biocompatibility, biodegradability, flexibility, and high elongation at break . Various blends/composites based on PCL have been extensively studied and reported as promising biomaterials for medical devices, tissue engineering, pharmaceutical controlled release systems, and biodegradable packaging . Furthermore, a number of PCL‐based medical devices and structures have been approved by Food and Drug Administration (FDA) and European Conformity (CE) Mark registration .…”

Section: Introductionmentioning

confidence: 99%

Cocoa Shell Waste Biofilaments for 3D Printing Applications

Tran

Bayer

Heredia‐Guerrero

et al. 2017

Macro Materials & Eng

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In this study, biofilaments based on cocoa shell waste, a by‐product of the chocolate industry, and biodegradable poly(ε‐caprolactone), PCL, have been prepared using a single‐screw extruder. Micronized cocoa shell waste is compounded in the polymer up to 50% by weight without significant alteration of its crystalline structure. Resultant elastic (Young's) modulus of biofilaments remains close to that of pure PCL. Scanning electron microscopy results indicate that micronized cocoa shell waste is homogeneously dispersed in the polymer during the extrusion process. Detailed thermal characterization measurements on the extruded filaments allow tuning of the fused deposition modeling 3D printing parameters. 3D printed items display a well‐defined structure with good adhesion between deposition layers and fine resolution. Hence, with this simple and solvent‐free fabrication technique, uniformly structured cocoa shell waste biofilaments can be produced in a very reproducible manner and can be used in 3D printing of diverse objects with potential household and biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Cocoa Shell Waste Biofilaments for 3D Printing Applications

Tran

Bayer

Heredia‐Guerrero

et al. 2017

Macro Materials & Eng

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“…The weak interfacial adhesion (due to the poor physical interlocking of components at the interface during melt cooling) in PA56/PET in comparison with PA66/PET is an advantage for the fabrication of bicomponent segmented pie fibers. For PA6/PET blends, on the other hand, an interphase thickness of ≈0.47 nm reported by Wang et al suggests a similarly weak interfacial adhesion suitable for bicomponent splittable fibers as also witnessed in experimental products …”

Section: Resultsmentioning

confidence: 52%

Morphology and Crystallization of Biobased Polyamide 56 Blended with Polyethylene Terephthalate

Yan

Gooneie

et al. 2018

Macro Materials & Eng

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This study attempts to promote biobased polyamide 56 (PA56) as a sustainable candidate to replace commercial PA6 and PA66 when blended with polyethylene terephthalate (PET). Scanning and transmission electron microscopy of the blends with different PA56 contents reveals an immiscible morphology with an increase in the size of the dispersed domains by increasing PA56 content. The steady‐state mixing torque of the kneader is decreased to half by adding 10 wt% of PA56 to PET. Further addition of PA56 gradually increases this torque but does not surpass the neat PET sample up to 30 wt% of PA56. As revealed by microscopic dissipative particle dynamics (DPD) simulations, this gradual increase is ascribed to the difficulty to disperse larger domains of PA56 in the thermodynamically undesired PET. The results confirm that PA56 has a lubricating effect in PET. Using polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X‐ray diffraction (XRD) techniques, it is shown that PA56 acts as a nucleating agent in PET. This leads to the formation of numerous small crystals in the blends as opposed to several large crystals in the neat samples. The results encourage the use of PA56 biomaterial in combination with PET in products such as bicomponent segmented pie fibers.

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“…These patterns indicated random crystal orientation. On the other hand, as the samples were drawn to DR = 5.0, sharp reflections were observed for PP domain on the equator at 2θ = 14.1°, 17.0°, and 18.5° attributed to the PP (110), (040), and (130) planes of PP α crystals, respectively . However, no peak characteristics of CHDH were observed in WAXD studies.…”

Section: Resultsmentioning

confidence: 93%

“…Ribbon‐like rectangular fibers are evident on the surface. Wang et al first developed such rectangular fibers having smaller dimension in thickness than in the width. The lateral dimension of fibers is controlled by the composition of separating materials or the lateral dimension of the exit die.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, a novel polymer continuous fiber fabrication technique was developed and PP/(PA6) fibrous membranes were produced with thickness of 0.62 mm, pore size of 12.5–128 μm, and porosity of ≈90% . This technique has proven to be useful for the production of multicomponent fibers and membranes having excellent mechanical and thermal properties .…”

Section: Introductionmentioning

confidence: 99%

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Polyolefin Microfiber Based Antibacterial Fibrous Membrane by Forced Assembly Coextrusion

Rahman

Lee

Wang

et al. 2016

Macromol. Mater. Eng.

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There is a burgeoning demand for polyolefin based fibrous membranes with antibacterial properties due to the increasing awareness about recyclable materials for air and water purification. This paper presents a systematic study on the development of dual component, polypropylene (PP), and high density polyethylene (HDPE) fibrous membranes based on a continuous coextrusion and multiplication manufacturing technique. Chlorhexidine dihydrochloride (CHDH), an organic low molecular weight antibacterial additive, is melt‐compounded to impart antibacterial characteristics to the fibrous membranes. The PP/HDPE membranes are hydrophobic and possess 77% porosity, whereas inclusion of CHDH increases the porosity to 91% and the surface area increases almost twofold. In addition, the membranes possess a mean flow pore size of 7 μm. ATR‐FTIR study on the PP/CHDH/HDPE membranes indicate the presence of CHDH on the fiber surface, which imparts antibacterial character to the membrane. Investigations carried out on the CHDH containing PP/HDPE fibrous membranes using E. Coli indicate that the presence of CHDH on the fiber surface results in a bacterial growth inhibition zone on solid growth media. In addition, quantitative studies result in the complete reduction of colony forming units after 4 h of contact time.

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Manufacturing of polymer continuous nanofibers using a novel co-extrusion and multiplication technique

Cited by 71 publications

References 42 publications

Cocoa Shell Waste Biofilaments for 3D Printing Applications

Cocoa Shell Waste Biofilaments for 3D Printing Applications

Morphology and Crystallization of Biobased Polyamide 56 Blended with Polyethylene Terephthalate

Polyolefin Microfiber Based Antibacterial Fibrous Membrane by Forced Assembly Coextrusion

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