Synthesis and characterization of electrospun PVA/Zn2+ metal composite nanofibers for lipase immobilization with effective thermal, pH stabilities and reusability

Polyvinyl alcohol (PVA)/Zn2+ electrospun nanofibers that were a kind of polymer/ionic metal composite was successfully embedded in the hybrid fibers for the first time in the literature, due to chemical interactions between PVA and Zn2+. Also, the nanofibers were used as carriers for the first time...

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Bibliographic Details
Published in:Materials Science & Engineering C 2019-06, Vol.99, p.1226-1235
Main Authors: Işik, Ceyhun, Arabaci, Gökmen, Ispirli Doğaç, Yasemin, Deveci, İlyas, Teke, Mustafa
Format: Article
Language:English
Subjects:
Alcohols
Chemical interactions
Composite materials
Crosslinking
Electrospinning
Enzymes
Fibers
Immobilization
Lipase
Materials science
Metals
Morphology
Nanofiber
Nanofibers
Organic chemistry
pH effects
Polymer/ionic metal composites
Polyvinyl alcohol
Thermal stability
Zinc
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Summary:Polyvinyl alcohol (PVA)/Zn2+ electrospun nanofibers that were a kind of polymer/ionic metal composite was successfully embedded in the hybrid fibers for the first time in the literature, due to chemical interactions between PVA and Zn2+. Also, the nanofibers were used as carriers for the first time in enzyme immobilization. The nanofibers were optimized and synthesized by electrospinning technique according to the operational parameters like as PVA concentration (%), Zn2+ concentration (%), voltage (kV), needle tip-collector distance (cm) and injection speed (ml/h). The morphology and structure of the nanofibers were characterized by SEM, XRD, ATR-FTIR and TGA. Lipase was immobilized on the nanofibers by adsorption and crosslinking methods. According to immobilization results, nanofiber enhanced enzyme stability properties like as thermal stability, pH stability and reusability. Lipase immobilized nanofiber protected 90% of its activity after 14 reuses. •We synthesized PVA/Zn2+ nanofibers using electrospinning.•We immobilized lipase onto electrospun nanofibers successfully.•Results showed that nanofibers enhanced the stability properties of lipase.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2019.02.031