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Superhydrophilic anti-fouling electrospun cellulose acetate membranes coated with chitin nanocrystals for water filtration
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). LuleƄ University of Technology, Sweden.
Number of Authors: 4
2016 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 510, 238-248 p.Article in journal (Refereed) Published
Abstract [en]

Electrospun cellulose acetate (CA) random mats were prepared and surface coated with chitin nano crystals (ChNC) to obtain water filtration membranes with tailored surface characteristics. Chitin nano crystals self-assembled on the surface of CA fibers into homogenous nanostructured networks during drying that stabilized via hydrogen bonding and formed webbed film-structures at the junctions of the electrospun fibers. Coating of CA random mats using 5% chitin nanocrystals increased the strength by 131% and stiffness by 340% accompanied by a decrease in strain. The flux through these membranes was as high as 14217 L m(-2) h(-1) at 0.5 bar. The chitin nanocrystal surface coating significantly impacted the surface properties of the membranes, producing a superhydrophilic membrane (contact angle 0) from the original hydrophobic CA mats (contact angle 132 degrees). The coated membranes also showed significant reduction in biofouling and biofilm formation as well as demonstrated improved resistance to fouling with bovine serum albumin and humic acid fouling solutions. The current approach opens up an easy, environmental friendly and efficient route to produce highly hydrophilic membranes with high water flux and low fouling for microfiltration water purification process wash water from food industry for biological contaminants.

Place, publisher, year, edition, pages
2016. Vol. 510, 238-248 p.
Keyword [en]
Chitin nanocrystals, Electrospinning, Cellulose acetate, Water permeability, Mechanical properties, Anti-fouling
National Category
Chemical Engineering Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-131183DOI: 10.1016/j.memsci.2016.02.069ISI: 000375127300025OAI: oai:DiVA.org:su-131183DiVA: diva2:939867
Available from: 2016-06-20 Created: 2016-06-14 Last updated: 2016-06-20Bibliographically approved

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Mathew, Aji P.
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Department of Materials and Environmental Chemistry (MMK)
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