Effect of lactic acid on polymer crystallization chain conformation and fiber morphology in an electrospun nylon-6 mat

Pant, Hem Raj; Baek, Woo-il; Nam, Ki-Taek; Jeong, Ilgyu; Barakat, Nasser A.M.; Kim, Hee Young

doi:10.1016/j.polymer.2011.08.059

Cited by 60 publications

(25 citation statements)

References 30 publications

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“…Moreover, thin fibers (true nanofibers) having a diameter less than 50 nm were also observed in all the mats. The formation of these thin fibers in the form of spider‐wave‐like nano‐nets is explained in previous reports . FE‐SEM images (Fig.…”

Section: Resultssupporting

confidence: 69%

Electrospun gelatin/nylon‐6 composite nanofibers for biomedical applications

Pant¹,

Kim²

2012

Polymer International

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We describe the preparation and characterization of gelatin-containing nylon-6 electrospun fibers and their potential use as a bioactive scaffold for tissue engineering. The physicochemical properties of gelatin/nylon-6 composite nanofibers were analyzed using field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, TGA and contact angle and tensile measurements. FE-SEM and TEM images revealed that the nanofibers were well oriented and showed a good incorporation of gelatin. FTIR spectroscopy and TGA also revealed that there was good interaction between the two polymers at the molecular level. The adhesion, viability and proliferation properties of osteoblast cells on the gelatin/nylon-6 composite nanofibers were analyzed by an in vitro cell compatibility test. Our results suggest that the incorporation of gelatin can increase the cell compatibility of nylon-6 and therefore the composite mat obtained has great potential in hard tissue engineering.

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Section: Resultssupporting

confidence: 69%

Electrospun gelatin/nylon‐6 composite nanofibers for biomedical applications

Pant¹,

Kim²

2012

Polymer International

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“…On the basis of the available literature, there have been several factors contributing to the formation of subnanofibers. In the brief reduction of the polymer solution viscosity, ionization and phase separation could be regarded as the most probable mechanisms contributing to the formation of such a structure . Hence, the increase in the conductivity of the polymer solution due to the presence of ions (‐

{CONH}_{2}^{+}

‐) could have been responsible for the formation of this spider‐net structure upon the main nanofibers.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, the chain twisted approximately 60 ° out of the plane; this led to the formation of hydrogen‐bonding sites. This resulted in a twisted conformation, which had less efficient hydrogen bonding and a metastable crystalline form . In general, the FTIR and Raman spectra showed that MIPs had been formed; this established interactions with the nanofibers.…”

Section: Resultsmentioning

confidence: 99%

Simple preparation and characterization of molecularly imprinted nylon 6 nanofibers for the extraction of bisphenol A from wastewater

Ardekani

Borhani

Rezaei

2018

J of Applied Polymer Sci

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Nylon 6 nanofibers incorporated with molecularly imprinted polymers (MIPs) were successfully fabricated by electrospinning with fiber diameters in the range 80-145 nm. Then, they were used as a new material for the extraction of selected bisphenol A (BPA) in water samples. Field emission scanning electron microscopy images revealed that the nanofibers had a smooth morphology with a good incorporation of MIPs. The Fourier transform infrared and energy-dispersive X-ray spectroscopy results also confirmed the formation of the MIPs in the nanofibers. Furthermore, Raman spectroscopy showed that the crystalline structure of the pristine nylon 6 nanofiber was a kind of α form, and the incorporation of MIPs led to a γ-form structure in the nanofibers; this proved the interactions between nylon 6 and the MIPs. Adsorption studies also confirmed that the adsorption efficiency of BPA onto the molecularly imprinted polymer nanofibers (MIP-NFs; 83.5%) was much greater than that onto nonimprinted polymer nanofibers (NIP-NFs; 36.8%). Also, the imprinting factor was 3.4; this strongly implied the successful formation of molecularly imprinted cavities on the MIP-NFs with a strong affinity to BPA. The maximum adsorption capacity of the MIP-NFs was 103.8 mg/g.

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“…Fabrication of polymeric fibers up to true nano-size (<50 nm in diameter) [7] with high aspect ratio has offered wide opportunities to construct more efficient interfaces for large-area electronics if they have electrical conductivity. Authors' previous reports show that nylon-6 is a potential candidate for the fabrication of true nanofibers (having high aspect ratio) in the form of spider-wave-like mat by varying process/material parameters during electrospinning [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

RGO/Nylon-6 composite mat with unique structural features and electrical properties obtained from electrospinning and hydrothermal process

Pant

Park

et al. 2013

Fibers Polym

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In this work, the reduced graphene oxide (RGO) sheets were effectively uploaded through nylon-6 fibers using combined process of electrospinning and hydrothermal treatment. Good dispersion of graphene oxide (GO) with nylon-6 solution could allow to upload GO sheets through nylon-6 fibers and facilitate the formation of spider-wave-like nano-nets during electrospinning. GO sheets present on/into nylon-6 spider-wave-like nano-nets were further reduced to RGO using hydrothermal treatment. The impregnated GO sheets into nylon-6 nanofibers and their reduction during hydrothermal treatment were confirmed by FE-SEM, TEM, FT-IR and Raman spectra. The electrical characteristics of pristine nylon-6, GO/nylon-6 and RGO/nylon-6 nanofibers were investigated and it was found that RGO/nylon-6 composite mat had better electrical conductivity than others. The formation of spider-wave-like nano-nets as well as indirect route of incorporation of RGO sheets on electrospun nylon-6 mat may open a new direction for future graphene/polymer electronics.

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Effect of lactic acid on polymer crystallization chain conformation and fiber morphology in an electrospun nylon-6 mat

Cited by 60 publications

References 30 publications

Electrospun gelatin/nylon‐6 composite nanofibers for biomedical applications

Electrospun gelatin/nylon‐6 composite nanofibers for biomedical applications

Simple preparation and characterization of molecularly imprinted nylon 6 nanofibers for the extraction of bisphenol A from wastewater

RGO/Nylon-6 composite mat with unique structural features and electrical properties obtained from electrospinning and hydrothermal process

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