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Statements

Subject Item
n2:RIV%2F49777513%3A23640%2F13%3A43919159%21RIV14-MSM-23640___
rdf:type
n5:Vysledek skos:Concept
rdfs:seeAlso
http://www.tandfonline.com/doi/abs/10.1080/19443994.2012.693655#.Up8wVOKGNnU
dcterms:description
High-performance thin-film composite polyamide membranes for inorganic solute separation were prepared by the polymerization of trimesoyl chloride (TMC) with diethylenetriamine, 1,3-cyclohexanebis(methylamine), 2,3-diaminopyridine (DAP), m-phenylenediamine (MPD), piperazine (PIP) or a mixture of MPD and PIP/DAP, on the surface of polyethersulfone (PES) membrane support. The characteristics of the skin layers were studied by IR spectroscopy, DSC, TG analysis, and SEM techniques. It was attempted to correlate the observed flux and rejection properties of the membranes with their preparation conditions such as reactant concentrations, reaction time, etc. The TGA thermograms show that the initial decomposition temperatures of the PES and polyamide blends are in the range of 330?400°C, which is about 20?90°C lower than that of PES (420°C). SEM images display that the top polyamide skin surface presents a honeycomb-like structure and the cross-section image of the membranes clearly displays the presence of a nodular structure that arises from the dense polyamide skin. Between the nodules, there are pore channels that traverse up to the polyester support. The stability of a polyamide skin layer depends on the preparation conditions. A higher concentration of the acid chloride (TMC } 0.5%) results in the formation of a low molecular weight amide?acid [HOOC-(Ar-COHN-X-NHOC-Ar)n-COOH] skin layer, wherease higher concentration of amine (Amine } 4%) produces a low molecular weight amide?amine [H2N-(X-NHOC-Ar-COHN-X)n-NH2] skin layer. The performance, i.e. rejection and water flux, of the composite embranes is strongly dependent on the chemical nature of the reactants, and on the skin layer preparation conditions. Membranes having a wide range of performances ranging from reverse osmosis to nanofiltration to ultrafiltration. High-performance thin-film composite polyamide membranes for inorganic solute separation were prepared by the polymerization of trimesoyl chloride (TMC) with diethylenetriamine, 1,3-cyclohexanebis(methylamine), 2,3-diaminopyridine (DAP), m-phenylenediamine (MPD), piperazine (PIP) or a mixture of MPD and PIP/DAP, on the surface of polyethersulfone (PES) membrane support. The characteristics of the skin layers were studied by IR spectroscopy, DSC, TG analysis, and SEM techniques. It was attempted to correlate the observed flux and rejection properties of the membranes with their preparation conditions such as reactant concentrations, reaction time, etc. The TGA thermograms show that the initial decomposition temperatures of the PES and polyamide blends are in the range of 330?400°C, which is about 20?90°C lower than that of PES (420°C). SEM images display that the top polyamide skin surface presents a honeycomb-like structure and the cross-section image of the membranes clearly displays the presence of a nodular structure that arises from the dense polyamide skin. Between the nodules, there are pore channels that traverse up to the polyester support. The stability of a polyamide skin layer depends on the preparation conditions. A higher concentration of the acid chloride (TMC } 0.5%) results in the formation of a low molecular weight amide?acid [HOOC-(Ar-COHN-X-NHOC-Ar)n-COOH] skin layer, wherease higher concentration of amine (Amine } 4%) produces a low molecular weight amide?amine [H2N-(X-NHOC-Ar-COHN-X)n-NH2] skin layer. The performance, i.e. rejection and water flux, of the composite embranes is strongly dependent on the chemical nature of the reactants, and on the skin layer preparation conditions. Membranes having a wide range of performances ranging from reverse osmosis to nanofiltration to ultrafiltration.
dcterms:title
A study on the relationship between preparation condition and properties/performance of polyamide TFC membrane by IR, DSC, TGA, and SEM techniques A study on the relationship between preparation condition and properties/performance of polyamide TFC membrane by IR, DSC, TGA, and SEM techniques
skos:prefLabel
A study on the relationship between preparation condition and properties/performance of polyamide TFC membrane by IR, DSC, TGA, and SEM techniques A study on the relationship between preparation condition and properties/performance of polyamide TFC membrane by IR, DSC, TGA, and SEM techniques
skos:notation
RIV/49777513:23640/13:43919159!RIV14-MSM-23640___
n5:predkladatel
n16:orjk%3A23640
n3:aktivita
n12:P
n3:aktivity
P(ED2.1.00/03.0088)
n3:cisloPeriodika
1-3
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n11:5331595 n11:6209904
n3:druhVysledku
n8:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
59120
n3:idVysledku
RIV/49777513:23640/13:43919159
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Thermal analysis; Membrane performance; Reactant concentration; Polyamide skin stability; Thin-film composite membrane
n3:klicoveSlovo
n4:Membrane%20performance n4:Polyamide%20skin%20stability n4:Thin-film%20composite%20membrane n4:Reactant%20concentration n4:Thermal%20analysis
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[64AFB67C2916]
n3:nazevZdroje
Desalination and Water Treatment
n3:obor
n14:CD
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:projekt
n17:ED2.1.00%2F03.0088
n3:rokUplatneniVysledku
n13:2013
n3:svazekPeriodika
51
n3:tvurceVysledku
Dodda, Jagan Mohan Kullová, Lucie
n3:wos
000313790300063
s:issn
1944-3994
s:numberOfPages
11
n19:doi
10.1080/19443994.2012.693655
n21:organizacniJednotka
23640