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Production of the Microfiltration Membranes of Wide Range Porosity, High Mechanical, Thermal and Chemical Stability by ,,Green’’ Fabrication Method

Mkheidze Nino, Gotsiridze Raul, Mkheidze Svetlana, Tenieshvili Ketevan

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 8

301--310

In the modern technological processes, the microfiltration membranes are used for removal of the suspended particles, colloids and microorganisms from the liquid solutions, as well as for use of the biologically active substances. Their demand at the world market rises day by day and if their production from the polymeric materials having wide range porosity, as well as high mechanical, thermal and chemical stability is provided the field of their use will expand even more. Proceeding from all above, fluoroplastic (F-4) was chosen, as the thermo- and chemically stable polymer used in medicine and food industry for production of the wide range porosity microfiltration membranes. The methods used for modification of membranes in the process of the research do not require any toxic solvents or complicated appliances or high power inputs. The thermo- and chemical stability of the produced membranes allows their multiple use in the process of filtration, which also allows implementing the principles of ,,green” technology. Pore sizes distribution of membranes was researched on Porometer by using the method of capillary flow porometry in compliance with the standards of ACTM F-316-03, which rules out using of the toxic (or hazardous substances), ex. mercury.

Influence of Technologic Parameters on Filtration Characteristics of Nonwoven Fabrics Obtained by Padding

Grzybowska-Pietras J., Malkiewicz J.

Fibres & Textiles in Eastern Europe

2007

Vol. 15, no. 5-6 (64)

82--85

The influence of the technological parameters of the padding process on the filtration properties of polyester nonwoven fabrics was analyzed. The variables were surface weight and binding agent concentration. The filtration properties were indirectly analyzed by pore size measurements and pore size distribution. The results obtained proved that the surface weight of webs strongly influenced the volumetric air flow of the tested nonwoven fabrics.

Analizowano wpływ parametrów technologicznych procesu napawania na właściwości filtracyjne włóknin otrzymanych z włókien poliestrowych. Zmiennymi parametrami były masa powierzchniowa runa i stężenie środka wiążącego. Właściwości filtracyjne analizowano w sposób pośredni poprzez pomiar wielkości porów i rozkładu frakcyjnego porów. Uzyskane wyniki dowiodły ,że masa powierzchniowa runa ma zdecydowany wpływ na objętościowy przepływ powietrza przez włókniny.