نتایج جستجو برای: permselectivity

تعداد نتایج: 329  

Journal: :Journal of chromatography. A 2005
Amel Hadj-Ziane Saâd Moulay Jean Paul Canselier

Mass transfer phenomenon that occurs in the pervaporation process when applied to the microemulsion breakdown, was confirmed by the results of inverse gas chromatography. The stationary phase for this study was polydimethylsiloxane (PDMS), a hydrophobic polymer employed as a membrane in the pervaporation technique. The retention times of the different molecule probes (toluene, cyclohexane, and ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2009
Gilad Yossifon Peter Mushenheim Yu-Chen Chang Hsueh-Chia Chang

Like ion channels, nanochannels are known to exhibit curious non-Ohmic current-voltage (I-V) characteristics with an approximate piece-wise constant differential resistance. Using a nanoslot model and a nonequilibrium ion transport theory, we attribute the nonlinear resistance to overlapping double layers inside and an extended polarized layer of space charge outside the nanochannel. The overli...

2014
Christopher R. Mason Louise Maynard-Atem Kane W. J. Heard Bekir Satilmis Peter M. Budd Karel Friess Marek Lanc̆ Paola Bernardo Gabriele Clarizia Johannes C. Jansen

Nitrile groups in the polymer of intrinsic microporosity PIM-1 were reduced to primary amines using borane complexes. In adsorption experiments, the novel amine-PIM-1 showed higher CO2 uptake and higher CO2/N2 sorption selectivity than the parent polymer, with very evident dual-mode sorption behavior. In gas permeation with six light gases, the individual contributions of solubility and diffusi...

2001
Zhi-Kang Xu Li Xiao Jianli Wang You-Yi Xu

Using N,N-dimethylacetalamide (DMAc) as the suspension media of polystyrene (PS) and poly[styrene-co-(4-vinyl-pyridin)] (PSVP) nanoparticles, insitu condensation polymerization of dianhydride and diamine was carried out and homogenous polyamic acid solution containing the nanoparticles were obtained. Novel PMDA-ODA nanocomposite membranes with various contents of nanoparticles were prepared by ...

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