Mesoporous molecular sieve (MCM-41)-filled sodium alginate hybrid nanocomposite membranes for pervaporation separation of water–isopropanol mixtures

Preyssler type heteropolyacid-incorporated highly water-selective sodium alginate-based inorganic–organic hybrid membranes for pervaporation dehydration of ethanol

“…The main focus in these studies is to achieve high separation factor and flux for one of the components of the mixture for an efficient separation. Natural polymer such as sodium alginate (NaAlg) has been widely used previously in PV separation due to its hydrophilic nature and good flexibility [2][3][4][5][6][7][8][9]. However, swelling of NaAlg membrane in aqueous media limits its application.…”

Pervaporation dehydration of isopropanol using blend membranes of chitosan and hydroxypropyl cellulose

“…One major industrial application of PV separation has been the dehydration of alcohols [4,5] using water-selective membranes. In our earlier research, we have developed blends, interpenetrating networks (IPNs) and mixed matrix membranes of hydrophilic polymers such as sodium alginate, poly(vinyl alcohol), gelatin, chitosan, etc., for the PV dehydration studies on aqueous-organic mixtures [6][7][8][9][10]. In continuation of these efforts, we have now chosen hydroxypropyl cellulose (HPC), a water-soluble cellulose ether and a carbohydrate polymer, which forms the compatible blends with a wide range of water-soluble polymers; particularly, its compatibility with another carbohydrate polymer such as chitosan (CS) is important to prepare their blends.…”

Preparation and characterization of filled matrix membranes of sodium alginate incorporated with aluminum-containing mesoporous silica for pervaporation dehydration of alcohols

“…A minimum of three independent measurements of flux and α were taken under similar conditions of temperature and feed compositions to confirm the steady-state pervaporation, but the averages of triplicate data are presented in all tables and plots. Details of the PV experimental set up have been reported in our earlier papers [27,29].…”

“…It is formed by condensation of silica around the selfassembled arrays of surfactant molecules in an aqueous gel. MCM-41 is hydrophilic and has been proved to improve the PV separation of water-isopropanol mixture [27]. It is expected that when Al-MCM-41 particles are embedded into NaAlg to form a mixed matrix membrane, the PV performance of the derived composite membrane will be better than the unfilled crosslinked NaAlg membrane.…”