TY - JOUR

T1 - Highly selective polybenzoxazinoneimide vs. its nonselective prepolymer in separation of water-ethanol mixture: Role of sorption parameters in pervaporation performance

AU - Pulyalina, Alexandra

AU - Goikhman, Mikhail

AU - Podeshvo, Irina

AU - Faykov, Ilya

AU - Polotskaya, Galina

N1 - Publisher Copyright: © 2021 Taylor & Francis Group, LLC.

PY - 2021/8/29

Y1 - 2021/8/29

N2 - Relationship between structure and transport properties of two polyheteroarylenes is studied on the example of polybenzoxazinoneimide (PBOI) and its prepolymer–polyamic acid imide-containing (PAAI). Formation of dense membranes, determination of their physical parameters, and control of membrane morphology by SEM were carried out. Transport properties of the membranes in the separation of the water–ethanol mixture were determined by sorption and pervaporation experiments. The equilibrium sorption degree, diffusivity, as well as sorption selectivity and diffusion selectivity of the PAAI and PBOI membranes were considered. The pervaporation experimental data on the total flux and the separation factor of the membranes were converted into permeability and selectivity to estimate the performance of the membranes. Due to the–COOH groups in the structure, PAAI membrane exhibits significantly higher sorption degree of water (4 times more) and ethanol (10 times more) as compared with those of PBOI. However, the PAAI membrane has water/ethanol sorption selectivity lower than 1, which indicates the absence of separation efficiency in the ethanol dehydration. In contrast, the PBOI membrane is very effective in the ethanol dehydration as the separation factor reaches 9000 in pervaporation of the mixture containing 10 wt% water.

AB - Relationship between structure and transport properties of two polyheteroarylenes is studied on the example of polybenzoxazinoneimide (PBOI) and its prepolymer–polyamic acid imide-containing (PAAI). Formation of dense membranes, determination of their physical parameters, and control of membrane morphology by SEM were carried out. Transport properties of the membranes in the separation of the water–ethanol mixture were determined by sorption and pervaporation experiments. The equilibrium sorption degree, diffusivity, as well as sorption selectivity and diffusion selectivity of the PAAI and PBOI membranes were considered. The pervaporation experimental data on the total flux and the separation factor of the membranes were converted into permeability and selectivity to estimate the performance of the membranes. Due to the–COOH groups in the structure, PAAI membrane exhibits significantly higher sorption degree of water (4 times more) and ethanol (10 times more) as compared with those of PBOI. However, the PAAI membrane has water/ethanol sorption selectivity lower than 1, which indicates the absence of separation efficiency in the ethanol dehydration. In contrast, the PBOI membrane is very effective in the ethanol dehydration as the separation factor reaches 9000 in pervaporation of the mixture containing 10 wt% water.

KW - ethanol dehydration

KW - pervaporation

KW - Polybenzoxazinoneimide

KW - selectivity

KW - sorption

KW - RECOVERY

KW - METHANOL

KW - TRANSPORT-PROPERTIES

KW - DEHYDRATION

KW - POLYIMIDE MEMBRANES

KW - ACID)

UR - http://www.scopus.com/inward/record.url?scp=85113885700&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/0872011a-eeb7-38f7-9182-64a2e70d616d/

U2 - 10.1080/01496395.2021.1969581

DO - 10.1080/01496395.2021.1969581

M3 - Article

AN - SCOPUS:85113885700

JO - Separation Science and Technology

JF - Separation Science and Technology

SN - 0149-6395

ER -