title: Electrospun polylactic acid and polyvinyl alcohol fibers as efficient and stable nanomaterials for immobilization of lipases.
abstract: Electrospinning was applied to create easy-to-handle and high-surface-area membranes from continuous nanofibers of polyvinyl alcohol (PVA) or polylactic acid (PLA). Lipase PS from Burkholderia cepacia and Lipase B from Candida antarctica (CaLB) could be immobilized effectively by adsorption onto the fibrous material as well as by entrapment within the electrospun nanofibers. The biocatalytic performance of the resulting membrane biocatalysts was evaluated in the kinetic resolution of racemic 1-phenylethanol (rac-1) and 1-phenylethyl acetate (rac-2). Fine dispersion of the enzymes in the polymer matrix and large surface area of the nanofibers resulted in an enormous increase in the activity of the membrane biocatalyst compared to the non-immobilized crude powder forms of the lipases. PLA as fiber-forming polymer for lipase immobilization performed better than PVA in all aspects. Recycling studies with the various forms of electrospun membrane biocatalysts in ten cycles of the acylation and hydrolysis reactions indicated excellent stability of this forms of immobilized lipases. PLA-entrapped lipases could preserve lipase activity and enantiomer selectivity much better than the PVA-entrapped forms. The electrospun membrane forms of CaLB showed high mechanical stability in the repeated acylations and hydrolyses than commercial forms of CaLB immobilized on polyacrylamide beads (Novozyme 435 and IMMCALB-T2-150).
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8., 1111, Budapest, Hungary. psoti@mail.bme.hu.
authors.forename: Péter Lajos
authors.initials: PL
authors.lastname: Sóti
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8., 1111, Budapest, Hungary.
authors.forename: Diana
authors.initials: D
authors.lastname: Weiser
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8., 1111, Budapest, Hungary.
authors.forename: Tamás
authors.initials: T
authors.lastname: Vigh
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8., 1111, Budapest, Hungary.
authors.forename: Zsombor Kristóf
authors.initials: ZK
authors.lastname: Nagy
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8., 1111, Budapest, Hungary.|SynBiocat Ltd., Lázár deák u. 4/1, 1173, Budapest, Hungary.
authors.forename: László
authors.initials: L
authors.lastname: Poppe
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8., 1111, Budapest, Hungary. gmarosi@mail.bme.hu.
authors.forename: György
authors.initials: G
authors.lastname: Marosi
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry*; D016956:Burkholderia cepacia / Q000201:enzymology*; D002175:Candida / Q000201:enzymology*; D004800:Enzymes, Immobilized / Q000737:chemistry*; D005656:Fungal Proteins / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry*; D008049:Lipase / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*
chemical_list: D001426:Bacterial Proteins; D004800:Enzymes, Immobilized; D005656:Fungal Proteins; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); D011142:Polyvinyl Alcohol; D008049:Lipase; C431349:lipase B, Candida antarctica
keywords: Biocatalysis; Electrospinning; Immobilization; Kinetic resolution; Lipase