Quaternized Amphiphilic Block Copolymers/Graphene Oxide and a Poly(vinyl alcohol) Coating Layer on Graphene Oxide/Poly(vinylidene fluoride) Electrospun Nanofibers for Superhydrophilic and ... View Full Text


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Article Info

DATE

2019-12

AUTHORS

Jeong-Ann Park, Kie Yong Cho, Chee Hun Han, Aram Nam, Jae-Hyun Kim, Sang-Hyup Lee, Jae-Woo Choi

ABSTRACT

Poly(vinylidene fluoride) (PVDF) is common polymer for electrospinning, however, its high hydrophobicity is a major drawback, which cause fouling. To introduce hydrophilicity and antibacterial activity, quaternary ammonium-functionalized amphiphilic diblock copolymers were synthesized and blended with a PVDF/graphene oxide (GO) solution, then, electrospun and coated with a hydrophilic polymer, poly(vinyl alcohol) (PVA). The amphiphilic block copolymer, consisting of a hydrophobic poly(methyl methacrylate) block and a hydrophilic poly[N,N-2-(dimethylamino)-ethyl methacrylate) block (PMMA-b-PDMAEMA), was synthesized. Polymeric quaternary ammonium with three different alkyl chain lengths (C2, C4, and C8) were successfully introduced to obtain as q-PMMA-b-PDMAEMA. The q-PMMA-b-PDMAEMA in the nanofiber matrix was confirmed by C=O bands (1734 cm-1) in the Fourier transform infrared spectra. Nano-sized spherical protuberances were distributed on the surface as revealed by field emission scanning and transmission electron microscopies. The PVDF/GO/q-PMMA-b-PDMAEMA@PVA nanofibers has superhydrophilic properties (water contact angle = 0-20°) and the pure water flux was generally improved by increasing the alkyl chain length. When introducing the longest alkyl chain (C8,OBC), the total fouling ratio was the lowest (49.99%) and the bacteria removal capacities after 60 min were the highest for both Escherichia coli (4.2 × 105 CFU/mg) and Staphylococcus aureus (6.1 × 105 CFU/mg) via growth inhibition and cytoplasmic membrane damage. More... »

PAGES

383

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-018-36479-w

DOI

http://dx.doi.org/10.1038/s41598-018-36479-w

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1111619204

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30674909


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