Physical and mass transfer properties of electrospun ε-polycaprolactone nanofiber membranes

被引:2
作者
Martins, Artur J. [1 ]
Bourbon, Ana I. [1 ]
Vicente, Antonio A. [1 ]
Pinto, Susana [2 ]
Lopes da Silva, Jose A. [2 ]
Rocha, Cristina M. R. [3 ]
机构
[1] Univ Minho, CEB Ctr Biol Engn, P-4710057 Braga, Portugal
[2] Univ Aveiro, Dept Chem, QOPNA, Aveiro, Portugal
[3] Univ Porto, Fac Engn, Dept Chem Engn, REQUIMTE,LAQV, P-4100 Oporto, Portugal
关键词
Nanofibers; Electrospinning; Nanoencapsulation; Biopolymer; Fick's diffusion; POLYMER NANOFIBERS; DIFFUSION; IMMOBILIZATION; FABRICATION; SOLVENT;
D O I
10.1016/j.procbio.2015.03.017
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Determination of material properties and functions is a crucial step toward optimization of fabrication methods as well as the development of electrospun nanofibers for use in, e.g. food engineering applications. This work focused in evaluating physical and mass transfer properties of simple poly epsilon-caprolactone nanofibers (PCL membrane), and poly epsilon-caprolactone nanofibers with encapsulated trypsin (E-PCL membrane), in view of their future use in a catalytic filter reactor. PCL membranes registered high hydrophobicity values, while E-PCL membranes revealed stronger mechanical properties and an increase of mass due to water incorporation. A decrease of average pore size in the range of 30-40% was observed for E-PCL membranes and an average pore diameter of 1/3 of the size was registered when compared to the PCL membrane; this difference was shown to be significant enough to influence the transport of larger molecules (e.g. bovine serum albumin). Release experiments of active compounds (lysozyme, bovine serum albumin and lactoferrin) were successfully described by a model which accounts for both Fick and case II transport - the linear superimposition model. Results show that the transport mechanism is influenced by the type of active compound and by membranes' physical properties. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:885 / 892
页数:8
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