Synthesis of Novel Polymeric Membrane for Separation of MTBE-Methanol by Pervaporation
29 Jun 2009-Separation Science and Technology (Taylor & Francis Group)-Vol. 44, Iss: 9, pp 1970-1990
TL;DR: In this article, three full crosslink IPN (IPN) membranes were synthesized with different weight ratio of PVOH:Poly (AA-co-HEMA) i.e., PVAHI, PVAHII and PVAHOIII.
Abstract: Polyvinyl alcohol(PVOH) has been chemically modified by crosslinking copolymerization of acrylic acid(AA) and hydroxyethylmethacrylate (HEMA) in aqueous solution of PVOH and finally crosslinking PVOH with glutaraldehyde to produce a full interpenetrating network(IPN) membrane. Accordingly, three such full crosslink IPNs i.e., PVAHI, PVAHII and PVAHIII have been synthesized with different weight ratio of PVOH:Poly (AA-co-HEMA) i.e., 1:0.25 (PVAHI), 1:0.50 (PVAHII) and 1:0.75 (PVAHIII). These IPN membranes have been used for pervaporative separation of MTBE-methanol mixtures. All the PVAH membranes were also characterized with various conventional methods like FTIR, mechanical properties, DSC and TGA. Permeability and methanol selectivity of these membranes were found to increase with increasing amount of copolymer in PVOH matrix. However, among the three membranes, PVAHIII were found to show the highest flux but lower selectivity for methanol while PVAHII membrane showed optimum performance in ter...
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08 Sep 2017
TL;DR: This article evaluates and collaborates the current research towards the development of next generation nanomaterials (NMs) and embedded polymeric membranes with regard to its synthesis, fabrication and application strategies, challenges and future prospects.
Abstract: Pervaporation (PV) has been considered as one of the most active and promising areas in membrane technologies in separating close boiling or azeotropic liquid mixtures, heat sensitive biomaterials, water or organics from its mixtures that are indispensable constituents for various important chemical and bio-separations. In the PV process, the membrane plays the most pivotal role and is of paramount importance in governing the overall efficiency. This article evaluates and collaborates the current research towards the development of next generation nanomaterials (NMs) and embedded polymeric membranes with regard to its synthesis, fabrication and application strategies, challenges and future prospects.
94 citations
TL;DR: In this paper, 10 commercial specialty membranes (PlyAn and Sulzer Pervap membranes) have been studied in a pervaporation setup at three temperatures (30, 40 and 50°C) and a feed concentration ranging between 20 and 80 mol% methano/butyl acetate.
74 citations
TL;DR: The N-H-activated in situ allocation of monomers, grafting of starch, thermal stabilities, surface properties, swellability, sustainability, adsorption capacities, and superadsorption were apprehended via microstructural analyses of unadsorbed and/or adsorbed starch-g-tetrapolymer(s) through FTIR-1H-/13C-NMR-UV-vis, TGA-DSC, XRD, SEM-
43 citations
TL;DR: GBD, an abundantly available collagenic-waste and crosslinked styrene butadiene rubber (SBR)-based scalable biocomposite showing excellent physicochemical properties and reusability was synthesized via systematic optimization of torque and time for exclusion(s) of dyes, such as safranine and brilliant cresyl blue, and Hg(II).
34 citations
07 Jan 2019
TL;DR: A CBD and NR-based scalable biocomposite bearing optimum cross-linking, excellent physicochemical properties, and reusability has been developed via systematic optimization of the torque and reaction time for cost-friendly adsorptive exclusion of dyes.
Abstract: For initiating a prosperous cost-friendly waste management of small-scale industries, cow buffing dust (CBD), one of the abundantly available semisynthetic collagenic solid wastes, has been used as a nonsulfur cross-linker of natural rubber (NR) for fabricating an NRCBD–biocomposite superadsorbent. The as-prepared reusable biocomposite bearing variegated collagenic and noncollagenic N-donors, along with the O-donors, has been reported for ligand-selective preferential superadsorption from waste water. Thus, a CBD and NR-based scalable biocomposite bearing optimum cross-linking, excellent physicochemical properties, and reusability has been developed via systematic optimization of the torque and reaction time for cost-friendly adsorptive exclusion of dyes, such as 2,8-dimethyl-3,7-diamino-phenazine (i.e., safranine, SF) and (7-amino-8-phenoxazin-3-ylidene)-diethylazanium dichlorozinc dichloride (i.e., brilliant cresyl blue), BCB, and Hg(II). The CBD-aided curing of NR has been achieved through the formatio...
24 citations
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646 citations
"Synthesis of Novel Polymeric Membra..." refers background in this paper
...However, the crosslinked PVOH requires much higher energy for segmental motion of its polymeric chain resulting in higher Tg (16,17)....
[...]
15 Jul 2004
TL;DR: In this article, the synthesis and solution characteristics of both natural and synthetic polymers are discussed, focusing on polynucleotides, polypeptides, and polysaccharides for naturally occurring polymers.
Abstract: Water-soluble (co)polymers represent a diverse class of macromolecules ranging from naturally occurring biopolymers such as polysaccharides and most polypeptides to wholly man-made materials. Such materials have found a wide-range of applications. In this article we detail the synthesis and solution characteristics of both natural and synthetic polymers. Emphasis is placed on polynucleotides, polypeptides, and polysaccharides for naturally occurring polymers, while the discussion regarding synthetic materials is divided into sections dealing with neutral, anionic, cationic, and zwitterionic species. Special attention is given to recent advances in synthetic methodologies which now allow the tailoring of synthetic materials with precisely controlled microstructures, predetermined molecular weights, narrow molecular weight distributions, and complex topologies.
Finally, we detail some of the self-assembly characteristics of both high molecular weight statistical copolymers and lower molecular weight block copolymers in aqueous media with an emphasis on those materials which undergo phase transitions and/or conformational changes in response to an applied stimulus.
Keywords:
water-soluble polymers;
naturally occurring polymers;
polynucleotides;
polypeptides;
proteins;
polysaccharides;
nonionic polymers;
polyelectrolytes;
polyzwitterions;
polyampholytes;
polybetaines
346 citations
"Synthesis of Novel Polymeric Membra..." refers background in this paper
...The copolymerization of AA and HEMA produces a crosslinking copolymer of poly(AA-co-HEMA) or polyAH on heating (11)....
[...]