Polymeric membranes

The non-porous, flat membranes were prepared from soluble polyimides based on 4,40 -oxydi(phthalic anhydride) or 4,40 -(hexafluoroisopropylidene)diphthalic anhydride and 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane. Poly(ethylene adipate) terminated with 4-methyl-1,3-phenylene diisocyanate with

Novel PEEK-WC-PU membrane results an interesting material which is able to support the long-term maintenance and differentiation of human hepatocytes. These results evidenced a good performance of PEEK-WC-PU membranes in terms of albumin and urea synthesis. Moreover the experiments with the bioreact

In recent years the study of new materials in the field of catalysis has been attracted the attention of scientific world in order to prepare catalysts more stable, selective and with the possibility of their easy recovery and recycle. In this work we investigated the preparation and characterizatio

experimental data pertinent to the free volume approach are presented. The positron lifetime measurements performed on vinyl polymers showed that the free volume of the amorphous phase varied with the pendant group change. The transport phenomena depend on both the free volume and the mobility of th

To elucidate the formation mechanisms of polymeric asymmetric porous membranes by wet phase separation we postulated a set of elementary processes (EPs) so that a combination of some of them in time and in space forms a particular membrane formation mechanism. Individual EP ought to be recognisable

In this work ten different polymeric microfiltration membranes of different materials polyethersulfone (PES), cellulose mixed esters (CE), cellulose acetate (CA), polypropylene (PP) and nylon (NY) with different pore diameters and of different commercial companies have been tested for wine clarifica