http://www.cnr.it/ontology/cnr/individuo/prodotto/ID55105

Effect of the preparation conditions on the formation of asymmetric poly(vinylidene fluoride) hollow fibre membranes with a dense skin (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Effect of the preparation conditions on the formation of asymmetric poly(vinylidene fluoride) hollow fibre membranes with a dense skin (Articolo in rivista) (literal)

Anno

2010-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.eurpolymj.2010.06.001 (literal)

Alternative label

Choi S.-H.; Tasselli F.; Jansen J.C.; Barbieri G.; and Drioli E.; (2010)
Effect of the preparation conditions on the formation of asymmetric poly(vinylidene fluoride) hollow fibre membranes with a dense skin
in European Polymer Journal; Elsevier BV, Amsterdam (Paesi Bassi)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Choi S.-H.; Tasselli F.; Jansen J.C.; Barbieri G.; and Drioli E.; (literal)

Pagina inizio

1713 (literal)

Pagina fine

1725 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

46 (literal)

Rivista

European Polymer Journal (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

http://dx.doi.org/10.1016/j.eurpolymj.2010.06.001 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

13 (literal)

Note

Scopu (literal)
ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

a - Institute on Membrane Technology, National Research Council (ITM-CNR), via Pietro Bucci, cubo 17C, c/o The University of Calabria, 87036 Rende (CS), Italy b - Department of Chemical Engineering and Materials, The University of Calabria, via Pietro Bucci, cubo 44A, 87036 Rende (CS), Italy (literal)

Titolo

Effect of the preparation conditions on the formation of asymmetric poly(vinylidene fluoride) hollow fibre membranes with a dense skin (literal)

Abstract

Integrally skinned asymmetric poly(vinylidene fluoride) hollow fibre membranes were prepared and characterized. The effects of phase inversion methods (dry-wet or wet) and spinning conditions, such as the type of solvent (NMP, DMAc), the concentration of polymer in dope solution, temperature of the external coagulation bath and the composition of the inner coagulant on the morphology and on the formation of a dense skin layer were investigated. The structure of the membranes was analyzed by scanning electron microscopy and the gas permeation properties with six different gases (He, H2, N2, O2, CH4 and CO2) were measured at 25 _C to confirm the integrity of the selective skin layer. Under the proper conditions highly selective and permeable PVDF hollow fibre membranes were thus obtained by dry-wet spinning of a 30 wt.% PVDF solution in DMAc, using hot water (50 _C) as the external coagulant and a bore fluid of pure water as the internal coagulant. The best membrane had a selective outer skin with an effective thickness of approximately 0.2 lm. The ideal selectivity of the hollow fibres approached or even exceeded the intrinsic ideal selectivity of a dense PVDF film, for instance the selectivity for He over N2 was 86.2 for the hollow fibre, whereas it was 83.5 for a dense PVDF reference film. DSC and FT-IR/ATR analysis indicated a higher fraction of the b-crystal phase in the selective skin and a high overall crystallinity than in the melt-processed film. The latter explains the relatively high selectivity and low permeability of the membranes. Intrinsic polymer properties make the membranes also suitable for vapour transport than for gas separation. (literal)

Editore