Journal ArticleDOI
Separation Behavior of Composite Polyamide Membranes from Mixed Amines: Effects of Interfacial Reaction Condition and Chemical Post-Treatment
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TLDR
In this paper, composite polyamide membranes are prepared using in-situ interfacial polymerization using mixed amine system comprising 1,4-phenylene diamine and pipperazine.Abstract:
Composite polyamide membranes are prepared using in-situ interfacial polymerization using mixed amine system comprising 1,4-phenylene diamine and pipperazine. Separation performance of the membranes are studied as a function of the concentration of amine and acid chloride, the concentration ratio of the amines, nature of the acid chloride, and the presence of surfactant and acid acceptor in the aqueous reagent. The effect of esterification and hydrazide reactions involving residual carboxylic acid groups in the polymeric membranes on the co-polymeric composite membrane performance is also studied. The membrane performance can be tailored easily by conversion of the residual reactive functional groups in post-treatment.read more
Citations
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Journal ArticleDOI
Molecular separation with organic solvent nanofiltration: a critical review.
Journal ArticleDOI
Current trends in interfacial polymerization chemistry
TL;DR: An overview of the chemistry that is used in interfacial polymerization, discusses the (dis)advantages of derived material types, and assesses the future prospects for synthesis of ultrathin functional materials via interfacial polymers.
Patent
Composite semipermeable membrane
Hiroki Minehara,Koji Nakatsuji +1 more
TL;DR: In this paper, a composite semipermeable membrane is proposed, which comprises a separation functional layer on a microporous support, and in which the functional layer is made of a condensation product of a polymer that has acidic groups and a trialkoxysilane groups having an imidazolium structure in side chains.
Journal ArticleDOI
The encouraging improvement of polyamide nanofiltration membrane by cucurbituril-based host–guest chemistry
Journal ArticleDOI
Incorporating hyperbranched polyester into cross-linked polyamide layer to enhance both permeability and selectivity of nanofiltration membrane
Xin Kong,Yin Zhang,Si-Yi Zeng,Bao-Ku Zhu,Liping Zhu,Li-Feng Fang,Li-Feng Fang,Hideto Matsuyama +7 more
TL;DR: In this paper, hyperbranched polyester (HPE) was selected as the nano-sized macromonomer and successfully incorporated into the skin layers on PVC hollow fiber substrates via interfacial polymerization between trimesoyl chloride and the mixtures of hydroxyl-terminated HPE/piperazine (PIP).
References
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Journal ArticleDOI
Composite reverse osmosis and nanofiltration membranes
TL;DR: A review of the field of thin film composite reverse osmosis membranes, with emphasis on the chemistry and composition of these membranes, is given in this article, with particular attention given to composite membranes that have found commercial use, whether in the present or past.
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Impacts of reaction and curing conditions on polyamide composite reverse osmosis membrane properties
TL;DR: In this paper, the impacts of organic solvent properties, reaction conditions, and curing conditions on polyamide composite reverse osmosis membrane separation performance, film structure, and interfacial properties are reported.
Patent
Interfacially synthesized reverse osmosis membrane
TL;DR: Good salt rejection and flux characteristics can be obtained with reverse osmosis membranes made from crosslinked, interfacially polymerized aromatic polyamides, particularly poly(arylenepolyamine aromatic polycarboxylamides) such as poly(phenylenediamine trimesamide) as discussed by the authors.
Journal ArticleDOI
Structure-motion-performance relationship of flux-enhanced reverse osmosis (RO) membranes composed of aromatic polyamide thin films.
TL;DR: The combined results of AFM, XPS, and solid-state NMR provided a robust explanation for the mechanism of flux enhancement of the aromatic polyamide T FC membranes with the addition of DMSO, which would contribute to not only a fundamental understanding of the process but also an advanced designing of the so-called "tailor-fit" TFC membranes.
Patent
Composite membrane and method for making the same
TL;DR: In this paper, a composite membrane and method for making the same, comprising a porous support and a polyamide surface, is presented, which is easily adapted to commercial scale manufacturing processes and is particularly suited for making nanofiltration and reverse osmosis composite membranes.