16. - 18. 10. 2013, Brno, Czech Republic, EU FUNCTIONALIZATION OF INDUSTRIALLY PRODUCED POLYMERIC NANOFIBROUS MATERIALS AT PARDAM, LTD. Miroslav TEJKL 1 , Jaroslava MORÁVKOVÁ 1 , Aneta KRAUSOVÁ 1 , Ladislav TORČÍK 2 , Tomáš SYROVÝ 3 1) Pardam s.r.o., Pardubice, Czech Republic, EU, [email protected], 2) NanoTrade s.r.o., Olomouc, Czech Republic, EU, [email protected], 3) University of Pardubice, Studentská 95, Pardubice, Czech Republic, EU Abstract Industrial production of polymeric nanofibers leads to new applications of well-known and broadly used polymeric materials. Added value is created by formation of these materials into fibrous nanostructures. Subsequent added value is achieved by functionalization. Generally, functionalization can be achieved by adding functional components into the spinning solution or by post-treatment of the spun nanofibrous material. Company Pardam primarily focusing on industrial nanofiber production has successfully tested processes of functionalization of its nanofibrous products. As an example of adding functional components into the spinning solution the incorporation of Ag nanoparticles with antibacterial effect into the polymeric nanofibrous membranes for water filtration is presented. Antibacterial effect was experimentally confirmed in cooperation with company NanoTrade that prepared suitable Ag nanoparticles solution. As an example of functionalization by post-treatment the increasing of nanofibrous membrane conductivity by impregnation with a conductive polymer (PEDOT:PSS) dispersion is presented. The electric resistance was decreased by at least three orders of magnitude to values of hundreds of Ω. There is a wide range of ways to functionalize nanofibrous materials and these examples are not meant to be an exhaustive list of successful modifications that Pardam can achieve. Keywords: Nanofibers, nanoparticles, functionalization, antibacterial treatment, nanosilver, conductive treatment, PEDOT 1. INTRODUCTION Production of nanofibers on industrial scale is a core business of Pardam, Ltd. The Forcespinning technology when fibers are created in a top-to-down way from a polymeric solution was adopted for economically feasible production. The production processes involving polymers and solvents with suitable physicochemical properties were developed and optimized. Because of practical reasons the main focus is on limited number of well known materials available on the market for reasonable price with properties suitable for fiber production. The product portfolio is somehow limited to those materials. The way to broaden such limited portfolio is a functionalization that is in general an introduction of functional chemical groups giving new properties to the material. Generally, functionalization can be achieved by adding functional components into the spinning solution or by post-treatment of the spun nanofibrous material. The examples of both approaches are presented and effects of functionalization are confirmed by measurements reported in this paper. 2. FUNCTIONALIZATION OF SPINNING SOLUTION Addition of functional material into the spinning solution has certain limitations because the negative impact of a presence of the functional additive on spinning process must be avoided. There are some requirements on physicochemical properties and concentration of functional additives such as physical and chemical compatibility with solution components (miscibility, inertness), long-term stability and low impact on polymeric solution rheological properties affecting the spinning process. From this point of view the solid nanoparticles
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16. - 18. 10. 2013, Brno, Czech Republic, EU
FUNCTIONALIZATION OF INDUSTRIALLY PRODUCED POLYMERIC NANOFIBROUS
MATERIALS AT PARDAM, LTD.
Miroslav TEJKL1, Jaroslava MORÁVKOVÁ1, Aneta KRAUSOVÁ1, Ladislav TORČÍK2, Tomáš