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Sulfonated Poly(Ether-Ether-Ketone) Polymer Membranes for Fuel Cells

Sulfonated Poly(Ether-Ether-Ketone) Polymer Membranes for Fuel Cells

In the work, sulfonated poly(ether-ether-ketone) (SPEEK) ionomers were synthesized using an original (submitted for patent) and simple method. The resulting membranes were tested to determine parameters that are important for the use of this material in fuel cells (water absorption, sulfonation degree, conductivity, etc.). The thermo-gravimetric analysis has shown a good thermal stability in the range from RT to 200-220 °C, and two characteristic regions of weight loss - 7.4% at ~140 °C (reversible water loss) and 10.3% at 200-220 °C (due to polymer degradation when cross-linked polymer chains permanently break down and their SO3H-groups are lost). The conductivity values obtained by the through-plane measurements of SPEEK membranes were 12 mS/cm at RT and 23 mS/cm at 80 °C.

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Permeability of P and K-nutrient through polystyrene membrane from aqueous solutions of urea + KH2PO4

.09.007. 3 . Cabello, S.D.P., Mollá, S., Ochoa, N.A., Marchese, J., Giménez, E. & Compañ, V.: New bio-polymeric membranes composed of alginate-carrageenan to be applied as polymer electrolyte membranes for DMFC. J. Power Sour. 265(11), 345-355 (2014). DOI: 10.1016/j.jpowsour.2014.04.093 . 4 . Seden, M.G., Baştürk, E., Inan, T.Y., Apohan, N.K. & Güngör, A.: Synthesis and fuel cell characterization of blend membranes from phenyl phosphine oxide containing flourinated novel polymers. J. Power Sourc. 271, 465-479 (2014). DOI: 10.1016/j.jpowsour.2014

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Characteristics of Polymeric Ultrafiltration Membranes Produced with the Use of Graphene Oxide

separation properties of polybenzimidazole (PBI) membrane by incorporation of silica nanoparticles. J Membrane Sci. 2009;331:21-30. DOI: 10.1016/j.memsci.2008.12.073. [7] Hong J, He Y. Effects of nano sized zinc oxide on the performance of PVDF microfiltration membranes. Desalination. 2012;302:71-79. DOI: 10.1016/j.desal.2012.07.001. [8] Blus M, Tomczak E, Tylman M. Effect of carbon nanotubes addition on the hydrodynamics of polymer membranes. Proc ECOpole. 2015;9(2):541-549. DOI: 10.2429/proc.2015.9(2)063. [9] Blus M, Tomczak E. Hydrodynamics of

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Tensile and Surface Mechanical Properties of Polyethersulphone (PES) and Polyvinylidene Fluoride (PVDF) Membranes

References [1] A luwi S hakir , N. A., K. Y. W ong , M. Y. N oordin , I. S udin . Development of a High Performance PES Ultrafiltration Hollow Fiber Membrane for Oily Wastewater Treatment Using Response Surface Methodology. Sustainability , 18 (2015), 16465-16482. [2] P raneeth , K. Synthesis and Characterization of Novel Polymeric Membranes for Water Purification and Effluents Treatment, PhD thesis, RMIT University, Australia, 2014. [3] S umisha , A., G. A rthanareeswaran , Y. L ukkathuyavan , A. F ismail , S. C hakraborty . Treatment of

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Reverse osmosis application in the recycling of zinc from the electroplating shop wastewater

Reverse osmosis application in the recycling of zinc from the electroplating shop wastewater

The paper reveals the results of the research on the reverse osmosis recovery of zinc from galvanic electroplating. The pilot plant tests were performed in an electroplating shop. Raw washings were concentrated with a spiral wound 2.5x40" module with a composite polymeric membrane.

The research tests have proved that the proposed RO process enables successful concentration of the nonferrous metal in raw washings. The retentate of the RO process has contained about 96% of the metal previously wasted in washings discharged to the environment. The retentate can be recycled to the mother electroplating process. The permeate of the RO process can be recycled to the washing system of the electroplating shop.

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Membranes obtained on the basis of cellulose acetate and their use in removal of metal ions from liquid phase

Abstract

The polymer membranes containing 18 wt% of cellulose acetate and different amounts of polyvinylpyrrolidone (PVP) as a cross-linker agent were used in the process of iron and copper ions removal from liquid phase. Depending on the content of PVP (changed from 1 to 4 wt.%) the membrane surfaces were characterised by different hydrophilic character and showed the dominant presence of surface oxygen-containing groups of acidic character. Irrespectively of the concentrations of solvents from which the metal ions had to be removed, the membranes showed better ability to remove Fe3+ ions than Cu2+ ones, and the membrane resistances decreased with increasing content of PVP. After the filtrations of solutions with iron ions the flux recovery ratio took rather high values; this ratio increased with increasing PVP content in the membrane.

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Controlled-release urea encapsulated by ethyl cellulose/butyl acrylate/vinyl acetate hybrid latex

Abstract

Fertilizer encapsulation through polymer membranes can reduce fertilizer losses and minimize environmental pollution. In this paper, an emulsion of ethyl cellulose (EC)/vinyl acetate (VAc)/butyl acrylate (BA) was successfully prepared by pre-emulsified semi-continuous seed emulsion polymerization. EC/BA/VAc films showed biodegradability. The influence of the EC content on the properties of EC/BA/VAc films was also investigated by DSC, a water absorbency analysis, etc. Controlled-release urea encapsulated by EC/BA/VAc latex was prepared in a film coating machine and conformed to the standards for slow-release fertilizers of the Committee of European Normalization. The release of urea from controlled-release urea encapsulated by EC/BA/VAc latex containing 0%, 5%, 10%, and 15% EC was 75.1%, 65.8%, 70.1% and 84.1%, respectively, after 42 days, and controlled-release urea encapsulated by EC/BA/VAc latex (5% EC) had the best controlled-release ability. Therefore, controlled-release urea encapsulated by EC/BA/VAc latex has many potential applications in agricultural industry.

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Chemical composition and properties of spray-dried sugar beet concentrate obtained after ultrafiltration of diffusion juice

polymeric membranes. ASSBT, 3st General meeting, Vancouver, 28 Feb.-3 March. 8. Tyndall , T.J. (1999). Recent developments in sugar clarification with tubular polymeric membranes. Proc. of the symposium on advanced technology for raw sugar and cane and beet sugar refined sugar production, New Orleans, USA, 8-10 Sept. 9. Butwiłowicz, A. (1997). Analytical methods for production control in sugar factories [in Polish]. IPC, Warszawa. 10. Kita, A. Tajner-Czopek, A. (2005). Analysis of food - the quality of food products [in

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Structural and Morphological Investigations on Coreshell Hybrid Microparticles

Polymer-SiO2 Particles by Rapid Expansion of Supercritical Solution with a Nonsolvent, International Journal of Advanced Research in Electrical Electronics and Instrumentation Engineering, 2003; [7] Lever, A.B.P., Inorganic electronic spectroscopy, Amsterdam: Elsevier, pp. 862, 1984; [8] Hua Bai, Gaoquan Shi, Gas sensors based on conducting polymers, Sensors 7(3), pp. 267-307; 2007; [9] Law Yong Ng, Abdul Wahab Mohammad, Choe Peng Leo, Nidal Hilal, Polymeric membranes incorporated with metal/metal oxide nanoparticles: A

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Removal of Organic Dyes from Aqueous Solutions with Surfactant-Modified Magnetic Nanoparticles

Literature Cited 1. Oxidation technologies for water and wastewater treatment IV (2007), Water Science and Technology 55, 12. 2. Mara, M. & Horan, N. (2003). The Handbook of Water and Wastewater Microbiology. Academic Press, London. 3. Bruce, D.W., Walton, R. & O’Hare, D. (2010). Porous Materials. John Wiley & Sons Inc., London. 4. Marchand-Brynaert, J. (2011). Polymer Membranes, in: P. Somasundaran, [Ed.] A. Hubbard: Encyclopedia of Surface and Colloid Science. Taylor and Francis, London. 5. Heitner, H.I. (2004). Flocculating agents, in: Kirk

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