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Size exclusion and affinity-based removal of nanoparticles with electrospun cellulose acetate membranes infused with functionalized cellulose nanocrystals

Materials & design, 2022-05, Vol.217, p.110654, Article 110654 [Peer Reviewed Journal]

2022 The Authors ;ISSN: 0264-1275 ;ISSN: 1873-4197 ;EISSN: 1873-4197 ;DOI: 10.1016/j.matdes.2022.110654

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  • Title:
    Size exclusion and affinity-based removal of nanoparticles with electrospun cellulose acetate membranes infused with functionalized cellulose nanocrystals
  • Author: Thomas, Reny Thankam ; Del Río de Vicente, José Ignacio ; Zhang, Kaitao ; Karzarjeddi, Mohammad ; Liimatainen, Henrikki ; Oksman, Kristiina
  • Subjects: Adsorption ; Cellulose nanocrystals ; Electrospinning ; Filtration ; Multifunctional membranes ; Trä och bionanokompositer ; Wood and Bionanocomposites
  • Is Part Of: Materials & design, 2022-05, Vol.217, p.110654, Article 110654
  • Description: [Display omitted] •Design of electrospun membranes infused with nanocellulose for size exclusion and affinity-based removal of nanoparticles (50–500 nm) and dye molecules.•Infusion of 0.5 wt% cellulose nanocrystals enabled tunable porosity, surface functionality, improved tensile strength while maintaining high flux (9500 Lm-2h−1)•More than 80% retention of 100 and 50 nm particles was achieved with cationic nanocellulose infused membranes. Membrane filtration and affinity-based adsorption are the two most used strategies in separation technologies. Here, µm-thick multifunctional and sustainable composite membranes of electrospun cellulose acetate (CA) infused with functionalized, anionic, and cationic cellulose nanocrystals (CNCs) with enhanced wettability, tensile strength, and excellent retention capacities were designed. CNCs could uniformly impregnate into the three-dimensional CA network to effectively improve its properties. The impregnation of cationic CNCs at 0.5 wt% concentration drastically increased the tensile strength (1669%) while maintaining high permeation flux of 9400 Lm-2h−1 which is remarkable with cellulose modified electrospun membranes. The membranes infused with anionic CNCs exhibited a particle retention efficiency of 96% for 500 nm and 77% for 100 nm latex beads whilst the cationic CNC membranes exhibited a combined particle retention strategy using selectivity and size exclusion with a retention of >81% with 100 nm latex beads and 80% with ∼50 nm silver nanoparticles. We envision that the developed multifunctional membranes can be utilized for affinity-based and size-exclusion filtration to selectively trap bacteria or substances of biological significance.
  • Publisher: Elsevier Ltd
  • Language: English
  • Identifier: ISSN: 0264-1275
    ISSN: 1873-4197
    EISSN: 1873-4197
    DOI: 10.1016/j.matdes.2022.110654
  • Source: SWEPUB Freely available online
    DOAJ Directory of Open Access Journals
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