TY - JOUR

T1 - Specific structure and properties of composite membranes based on the Torlon® (polyamide-imide)/layered perovskite oxide

AU - Pulyalina, Alexandra

AU - Rostovtseva, Valeriia

AU - Minich, Iana

AU - Silyukov, Oleg

AU - Toikka, Maria

AU - Saprykina, Nataliia

AU - Polotskaya, Galina

N1 - Pulyalina, A.; Rostovtseva, V.; Minich, I.; Silyukov, O.; Toikka, M.; Saprykina, N.; Polotskaya, G. Specific Structure and Properties of Composite Membranes Based on the Torlon® (Polyamide-imide)/Layered Perovskite Oxide. Symmetry 2020, 12, 1142.

PY - 2020/7

Y1 - 2020/7

N2 - The use of perovskite-type layered oxide K2La2Ti3O10 (Per) as a modifier of the Torlon® polyamide-imide (PAI) membrane has led to the formation of an specific structure of a dense nonsymmetrical film, namely, a thin perovskite-enriched layer (3-5 μm) combined with the polymer matrix (~30 μm). The PAI/Per membrane structure was studied by SEM in combination with energy dispersive microanalysis of the elemental composition which illustrated different compositions of top and bottom surfaces of the perovskite-containing membranes. Measurement of water and alcohol contact angles and calculation of surface tension revealed hydrophilization of the membrane surface enriched with perovskite. The transport properties of the nonsymmetrical PAI/Per membranes were studied in the pervaporation of ethanol-ethyl acetate mixture. The inclusion of 2 wt. % Per in the PAI gives a membrane with a high separation factor and increased total flux.

AB - The use of perovskite-type layered oxide K2La2Ti3O10 (Per) as a modifier of the Torlon® polyamide-imide (PAI) membrane has led to the formation of an specific structure of a dense nonsymmetrical film, namely, a thin perovskite-enriched layer (3-5 μm) combined with the polymer matrix (~30 μm). The PAI/Per membrane structure was studied by SEM in combination with energy dispersive microanalysis of the elemental composition which illustrated different compositions of top and bottom surfaces of the perovskite-containing membranes. Measurement of water and alcohol contact angles and calculation of surface tension revealed hydrophilization of the membrane surface enriched with perovskite. The transport properties of the nonsymmetrical PAI/Per membranes were studied in the pervaporation of ethanol-ethyl acetate mixture. The inclusion of 2 wt. % Per in the PAI gives a membrane with a high separation factor and increased total flux.

KW - Composite membrane

KW - Critical surface tension

KW - Perovskite

KW - Pervaporation

KW - Polyamide-imide

KW - critical surface tension

KW - ENERGY

KW - perovskite

KW - VAPOR PERMEATION

KW - composite membrane

KW - SEPARATION PERFORMANCE

KW - PERVAPORATION DEHYDRATION

KW - TRANSPORT

KW - AQUEOUS 2-PROPANOL SOLUTIONS

KW - ETHYL-ACETATE

KW - ETHANOL

KW - polyamide-imide

KW - pervaporation

UR - http://www.scopus.com/inward/record.url?scp=85088569683&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/9d70bb63-f420-3e29-b2d5-b9f624c19633/

U2 - 10.3390/sym12071142

DO - 10.3390/sym12071142

M3 - Article

AN - SCOPUS:85088569683

VL - 12

JO - Symmetry

JF - Symmetry

SN - 2073-8994

IS - 7

M1 - 1142

ER -