Home > Press > Nanoparticles Display Ability to Improve Efficiency of Filters
Abstract:
Iranian researchers from Kharazmi University studied the effects of application of nanoparticles to increase the efficiency and lifetime of polymeric membranes and reduce the cost of separation processes.
Nanoparticles Display Ability to Improve Efficiency of Filters
Tehran, Iran | Posted on October 28th, 2014 The membranes are used in water purification industries, milk concentration and transparency of fruit juices.
In addition to high efficiency, separation through filters has lower operational costs. Therefore, the wide application of the devices is observed in various industries. The aim of the research was to reduce the blocking of ultrafiltration membrane made of emulsified polyvinyl chloride by using titanium dioxide (TiO2) nanoparticles.
Being more hydrophobic is the problem of emulsified polyvinyl chloride in comparison with other polymers, including polyether sulfone. The use of titanium dioxide nanoparticles increases hydrophilicity of the synthetic membrane, and it prevents organic materials from sticking to the surface of the membrane, so the pores of the membrane are not blocked any more. Therefore, the addition of nanoparticles increases porosity and the flux of water and protein passing through the synthetic membrane. This membrane has even better performance than the similar polyether sulfone membranes.
The research team is currently studying the application of other nanoparticles for the modification of EPVC polymer.
When titanium dioxide nanoparticles are placed in water, they adsorb some of it and their surfaces become hydrophilic. In case the particles are added to the polymer and a membrane is made of them, the surface of the membrane absorbs a layer of water due to the presence of nanoparticles, and it prevents hydrophobic organic materials from sticking to its surface.
Results of the research have been published in Journal of Membrane Science, vol. 472, issue 1, 2014, pp. 185-193.
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