Development of gelatin/chitosan membranes with controlled microstructure by electrospinning
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Electrospun membranes obtained through electrospinning are very promising since they exhibit a high porosity and surface area. The present study proposes the use of gelatin (GL) made from fish by-products in combination with a polycationic polysaccharide (chitosan, CH) and a water-soluble polymer (polyethylene oxide, PEO) to obtain unitary, binary or even ternary nanofibrous membranes which would be suitable in different applications, such as biomaterials or filtration industry. This work aims to correlate the microstructure of final ternary membranes (GL–CH–PEO) and the properties of the solutions by evaluating their viscosity obtained through rheological characterization, as well as their conductivity and density, which are key parameters to obtain a suitable electrospinning processing technique. The results indicate that membranes with a fairly homogeneous distribution of fibers can be obtained using either biopolymer/PEO binary solutions (i.e., 00/85/30 or 05/00/35 systems) or even ternary solutions (05/85/35 or 05/85/35) with diameters shorter than 200 nm. In this sense, physicochemical characterization of the polymer/biopolymer solutions used for electrospinning processing technique is essential for the understanding of this technique.
KeywordsBio-based Chitosan Electrospinning Nanofibers Membranes
This work is part of a research project, with reference CTQ2015-71164-P, sponsored by “Ministerio de Economía y Competitividad” from Spanish Government (MINECO/FEDER, EU). The authors gratefully acknowledge their financial support. The authors also acknowledge the Microscopy Service (CITIUS-Universidad de Sevilla) for providing full access and assistance to the JEOL 6460-LV. The authors also acknowledge the University of Seville for the financial support to Victor Perez-Puyana and Manuel Felix supported by VPPI-US.
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