Permeability of responsive polymer -- grafted porous membranes

temperature, pH and multi-stimuli response.
  • 225 Pages
  • 2.69 MB
  • English
The Physical Object
Pagination225 leaves.
ID Numbers
Open LibraryOL19985343M
ISBN 100612498328

Photoresponsive polymer-grafted porous membranes are an important group of photoresponsive membranes in which photoresponsive polymers are grafted over the membrane surface. These grafted photoresponsive polymers impart photoresponsiveness to the membranes and bring changes by changing their structure, confirmation, and solvation in response to.

Membranes with pH-responsive permeability are produced by grafting PMAA within the pores of porous polyethylene membranes [], by grafting acrylic acid (AA) on the porous polypropylene membrane. Peng, Y.-L. Cheng, PNIPAAm and PMAA co-grafted porous PE membranes: Living radical co-grafting mechanism and multi-stimuli responsive permeability.

Polymer. Permeability of porous membrane J. MICHALOV Institute of Experimental Biology and Ecology, Centre for Biological and Ecological Research, Slovak Academy of Sciences, CS 34 Bratislava Received 1 December The permeability of porous membrane is determined by the size of pores, membrane structure, and magnitude and character of driving forces.

a porous substrate and a polymer layer obtained by plasma-induced graft polymerization method were studied. It has shown that the presence of the polymer layer on the surface of porous substrate leads to changing its transport properties − the water permeability of the formed composite membranes substantially depends on the solution pH.

These. Responsive polymer membranes are systems that sense the changes in their environment as a stimulus and make a desired response. In all cases, either a controlled porosity or a texture and chemical composition is coupled with adaptive properties, such as pH- ionic strength- thermo- light- electric- and magnetic-response and molecular Cited by: Polymer chains extend and contract in response to the changes of environmental conditions in solution.

In the present article, several signal-responsive polymers were grafted on porous membranes as brushes, and the permeation control by the extension and contraction of the graft chains on the porous membrane surface was summarized.

By comparison with the permeation of metal ions through the non-thermo-responsive porous polyethylene membranes grafted with AAc chains or random copolymer gel membranes (poly(A-ProOMe-co-AAc)), it is clear that the structure in which adjacent carboxyl groups of poly(AAc) are surrounded by thermo-responsive A-ProOMe matrix causes selective Cited by: 6.

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Design and fabrication of porous polymer wick structures Viktor Shkolnikov1, Daniel G. Strickland2, David P. Fenning3, Juan G. Santiago∗ Department of Mechanical Engineering, Stanford University, Stanford, CAUSA article info Article history: Received 4 May Received in revised form 17 August Accepted 26 August File Size: KB.

Polymeric additives were used to increase porosity of membranes and their permeability as well as to make them suited for filtration experiments. This process resulted in the formation of thin, flexible, and porous membranes containing atrazine-specific binding sites.

The pore size and permeability control of the glucose-responsive gating membranes will be described systematically. The glucose-responsivity of the solute diffusional permeability through the prepared flat membranes is heavily dependent on the PAAC grafting yield, because the pH-responsive change of pore size governed the glucose-responsive Author: Liang-Yin Chu.

Dipankar Pal, Sudarsan Neogi and Sirshendu De, Surface modification of polyacrylonitrile co-polymer membranes using pulsed direct current nitrogen plasma, Thin Solid Films, /,(), ().

Signal‐responsive gating of porous membranes by polymer brushes Article in Polymers for Advanced Technologies 11(3) - March with 14 Reads How we measure 'reads'. et al. Polymeric molecular sieve membranes via in situ cross-linking of non-porous polymer membrane templates.

Nat. Commun. doi: /ncomms ().Cited by: Total result(s) found: 71 ; 3D visualization of the internal nanostructure of polyamide thin films in RO membranes F. Pacheco, R. Sougrat, M.

Reinhard, J. The research on electro-conductive membranes has expanded in recent years.

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These membranes have strong prospective as key components in next generation water treatment plants because they are engineered in order to enhance their performance in terms of separation, flux, fouling potential, and permselectivity.

The present review summarizes recent developments in the preparation of electro Cited by: A key issue in understanding polymer performance is to control and predict in-situ porous medium rheology. The first part of this paper reviews recent developments in understanding polymer flow in porous medium.

Especially, polymer in-situ rheology and injectivity is : Arne Skauge, Nematollah Zamani, Jørgen G. Gausdal Jacobsen, Behruz S. Shaker Shiran, Badar Al-Shakry. This review summarises the advances since on high permeability polymer-based membrane materials for CO 2 separations.

The major features of this review are reflected in the following three aspects: (1) we cover polymer-based membrane materials instead of purely polymeric membrane materials, which encompass both polymeric membranes and Cited by: Ali Tufani 1 and; Gozde Ozaydin Ince 1,2,*; Article first published online: 27 MAY DOI: /app © Wiley Periodicals, Inc.

Protein binding to the charged polymer brushes grafted onto the porous hollow-fiber membranes was evaluated in a permeation mode. Breakthrough curves, i.e. protein concentration changes in the effluent as a function of effluent volume, are shown in Fig. 8(a) and (b) for the binding of HEL to the SS-Diol (M or B,10) fiber and BSA to the Cited by: Characterization of Polymer Vesicles.

To determine the permeability and solute rejection properties of polymer vesicles by using stopped-flow spectroscopy, a knowledge of the physical dimensions (radius in hydrated state) and morphology (hollow vs. solid sphere structure) is necessary. Chemists design new materials at the molecular scale, employing polymer synthesis and gas transport theories with the aim of maximizing solubility and diffusivity differences between specific gases.

These theories are tested in the Gas Permeation and Sorption Laboratory. Controlled Permeability Polymer Membranes.

Annual Review of Materials Science Vol. (Volume publication date August ) Annual Review of Materials Science Design and Properties of Glass-Ceramics G H Beall Annual Review of Materials Science Transient Liquid Phase BondingCited by: For transport across membranes, these ideas have been codified in the simple equation (for neutral solute) j= – p(c in-c out), where j is the net flux into the cell, c in and c out refer to the concentrations on the inside and outside of the membrane bound region, and p is a material parameter known as the permeability.

The units of p can. Effect of PVDF characteristics on extruded film morphology and porous membranes feasibility by stretching. J Polymer Sci Part B Polymer Phys ;– [36] Kurumada KI, Kitamura T, Fukumoto N, Oshima M, Tanigaki M, Kanazawa SI.

Structure generation in PTFE porous membranes induced by the uniaxial and biaxial stretching operations. Here we describe porous polymer actuators that bend in response to acetone vapour (24 kPa, 20 °C) at a speed of an order of magnitude faster than Cited by: are squeezed out of the polymer and the PNIPAAm gel starts to shrink.

These polymers, unfortunately, usually lack sufficient mechanical strength to be used alone in practical applications. Other studies have aimed at manufacturing composite membranes by grafting. Polymer Membranes Overview Benny D. Freeman Professor, Department of Chemical Engineering, Member, Texas Materials Institute, Center for Energy and Environmental Resources, and EWRE The University of Texas at Austin [email protected]

Porous Stimuli-Responsive Polymer Architectures as Optical Sensing Materials and Smart Membranes Dr.-Ing. Markus Gallei Ernst-Berl-Institute for Technical and Macromolecular Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str.

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4, D Darmstadt, Germany E-Mail: @ Invited Seminar in the Hatton Group. Porous membranes. One can use polymer or alumina membranes in the synthesis of wires and other 1-D components. These membranes can be purchased commercially or for the alumina membranes, can be prepared in-house by electroanodization techniques.

Below are shown examples of commercial polymer and alumina membranes as well as some alumina membranes we have prepared in our labs. Testing Water Vapour Permeability through Porous Membranes Hubert Schmidt, Danuta Marcinkowska, Małgorzata Cieślak The Institute of Textile Materials Engineering ul.

GdańskaŁódź, Poland E-mail: [email protected] Abstract A fast gravimetric method for determining water vapour permeability through porous mem-branes is presented.Permeable, porous polymeric membrane with hydro­philic character of the membrane, said character being obtained by treatment with a solution com­prising one or more hydrophilic, mono-or polymeric compounds selected among soluble, OH-containing cellulose derivatives, polyvinylalcohols and low molecular weight, polyfunctional, NH-and/or OH-­containing compounds, optionally in the presence of Cited by: A novel single-step approach, named phase transformation interfacial growth (PTIG), was developed for the fabrication of metal–organic framework membranes on polymeric substrates.

Both the separation layer and the substrate were formed within the PTIG process. This innovative methodology paves a Cited by: 5.