Preparation and characterization of long-term stable pullulan nanofibers via in situ cross-linking electrospinning

Pullulan nanofibers with long-term stabilization were fabricated by using glutaraldehyde as the cross-linking agent and sulfuric acid as the catalyzer via in situ cross-linking electrospinning. The structural, chemical, and thermal analyses have been conducted by field emission scanning electron mic...

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Vydáno v:Adsorption science & technology Ročník 37; číslo 5-6; s. 401 - 411
Hlavní autoři: Li, Zongjie, Pan, Tiandi, Wu, Yuke, Kang, Weimin, Liu, Yong
Médium: Journal Article
Jazyk:angličtina
Vydáno: London, England SAGE Publications 01.07.2019
Sage Publications Ltd
SAGE Publishing
Témata:
Crosslinking
Electrospinning
Emission analysis
Field emission microscopy
Fourier transforms
Glutaraldehyde
Nanofibers
Organic chemistry
Photoelectrons
Pullulan
Spectrum analysis
Sulfuric acid
Water absorption
Weight loss
Electrospinning
pullulan
separation
in situ cross-linking
nanofibers
ISSN:0263-6174, 2048-4038
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Shrnutí:Pullulan nanofibers with long-term stabilization were fabricated by using glutaraldehyde as the cross-linking agent and sulfuric acid as the catalyzer via in situ cross-linking electrospinning. The structural, chemical, and thermal analyses have been conducted by field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and differential scanning calorimetry. Cross-linked pullulan nanofibers were found thermally more stable. More importantly, the water absorption and water solubility of the cross-linked pullulan nanofiber membranes were evaluated. The results showed that the water absorption rate increased significantly (from 327% to 651%) and the weight loss rate decreased (from 19.0% to 4.1%) with the increase of glutaraldehyde content. Overall, this in situ cross-linking electrospinning technique provides a method to cross-link pullulan during electrospinning. The cross-linked pullulan nanofibers could be employed as promising materials for a variety of potential applications in adsorption and separation fields.
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ISSN:0263-6174
2048-4038
DOI:10.1177/0263617418813018