BEGIN:VCALENDAR VERSION:2.0 PRODID:-//142.1.176.100//NONSGML kigkonsult.se iCalcreator 2.26.9// CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Chemical Engineering &\; Applied Chemistry X-WR-CALDESC: X-FROM-URL:https://chem-eng.utoronto.ca X-WR-TIMEZONE:America/Toronto BEGIN:VTIMEZONE TZID:America/Toronto X-LIC-LOCATION:America/Toronto BEGIN:STANDARD DTSTART:20231105T020000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RDATE:20241103T020000 TZNAME:EST END:STANDARD BEGIN:DAYLIGHT DTSTART:20240310T020000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RDATE:20250309T020000 TZNAME:EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:ai1ec-21135@chem-eng.utoronto.ca DTSTAMP:20240329T152024Z CATEGORIES: CONTACT:Delicia Ansalem\; delicia.ansalem@utoronto.ca DESCRIPTION:External members are required to register to receive the link a nd passcode. Registration closed at 9am on March 21.\nCo-hosted with the I nstitute for Water Innovation (IWI)\nBenny Freeman\, University of Texas a t Austin\nHost: Prof. Jay Werber\n \nCharged polymer membranes are widely used for water purification applications involving control of water and io n transport\, such as reverse osmosis and electrodialysis. Efforts are al so underway worldwide to harness separation properties of such materials f or energy generation in related applications such as reverse electrodialys is and pressure retarded osmosis. Additional applications\, such as energ y recovery ventilation and capacitive deionization\, rely on polymer membr anes to control transport rates of water\, ions\, or both. Improving memb ranes for such processes would benefit from more complete fundamental unde rstanding of the relation between membrane structure and ion sorption\, di ffusion and transport properties in both cation and anion exchange membran e materials. Ion-exchange membranes often contain strongly acidic or basic functional groups that render the materials hydrophilic\, but the presenc e of such charged groups also has a substantial impact on ion (and water) transport properties through the polymer.\nWe are exploring the influence of polymer backbone structure\, charge density\, and water content on ion transport properties. Results from some of these studies will be presente d\, focusing on transport of salt\, primarily NaCl\, through various neutr al\, positively charged and negatively charged membranes via concentration gradient driven transport (i.e.\, ion permeability) and electric field dr iven transport (i.e.\, ionic conductivity). One long-term goal is to deve lop and validate a common framework to interpret data from both electrical ly driven and concentration gradient driven mass transport in such polymer s and to use it to establish structure/property relations leading to ratio nal design of membranes with improved performance.\nIon sorption and perme ability data were used to extract salt diffusion coefficients in charged m embranes. Concentrations of both counter-ions and co-ions in the polymers were measured via desorption followed by ion chromatography or flame atom ic absorption spectroscopy. Salt permeability\, sorption and electrical c onductivity data were combined to determine individual ion diffusion coeff icients in neutral\, cation exchange and anion exchange materials. Manning ’s counter-ion condensation models and the Mackie/Meares model were used t o correlate and\, in some cases\, predict the experimental data.\n________ _____________________________\nProfessor Benny Freeman is the William J. ( Bill) Murray\, Jr. Endowed Chair of Engineering in the Chemical Engineerin g department at The University of Texas at Austin. He is a professor of C hemical Engineering and has been a faculty member for 30 years. He comple ted graduate training in Chemical Engineering at the University of Califor nia\, Berkeley\, earning a Ph.D. in 1988. In 1988 and 1989\, he was a pos tdoctoral fellow at the Ecole Supérieure de Physique et de Chimie Industri elles de la Ville de Paris (ESPCI)\, Laboratoire Physico-Chimie Structural e et Macromoléculaire in Paris\, France. Dr. Freeman was a member of the chemical engineering faculty at NC State University from 1989 – 2002\, and he has been a professor of chemical engineering at The University of Texa s at Austin since 2002. Dr. Freeman’s research is in polymer science and engineering and\, more specifically\, in mass transport of small molecules in solid polymers. His research group focuses on structure/property corr elation development for desalination and gas separation membrane materials \, new materials for hydrogen separation\, natural gas purification\, carb on capture\, and new materials for improving fouling resistance in liquid separation membranes. He leads the Center for Materials for Water and Ener gy Systems (M-WET)\, a DOE Energy Frontier Research Center and serves as C hallenge Area Leader for Membranes in the National Alliance for Water Inno vation (NAWI)\, a five-year\, DOE sponsored Energy-Water Desalination Hub to address critical technical barriers needed to radically reduce the cost and energy of water purification.\nHis research is described in more than 450 publications and 30 patents/patent applications. He has co-edited 5 books on these topics. He has won a number of awards\, including a Fulbri ght Distinguished Chair in Disruptive Separations (2017)\, Fellow of the N orth American Membrane Society (NAMS) (2017)\, the Distinguished Service A ward from the Polymeric Materials: Science and Engineering (PMSE) Division of the American Chemical Society (ACS) (2015)\, Joe J. King Professional Engineering Achievement Award from The University of Texas (2013)\, Americ an Institute of Chemical Engineers (AIChE) Clarence (Larry) G. Gerhold Awa rd (2013)\, Society of Plastics Engineers International Award (2013)\, Roy W. Tess Award in Coatings from the PMSE Division of ACS (2012)\, the ACS Award in Applied Polymer Science (2009)\, AIChE Institute Award for Excell ence in Industrial Gases Technology (2008)\, and the Strategic Environment al Research and Development Program Project of the Year (2001). He is a F ellow of the AAAS\, AIChE\, ACS\, and the PMSE and IECR Divisions of ACS. He has served as chair of the PMSE Division of ACS\, chair of the Gordon Research Conference on Membranes: Materials and Processes\, President of t he North American Membrane Society\, Chair of the Membranes Area of the Se parations Division of the AIChE\, and Chair of the Separations Division of AIChE. His research has served as the basis for several startup companies \, including Energy-X and NALA Systems.\n \nView the complete 2021-22 LLE schedule\nQuestions? Please contact Delicia Ansalem\, Communications Offic er & External Relations Liaison delicia.ansalem@utoronto.ca DTSTART;TZID=America/Toronto:20220323T120000 DTEND;TZID=America/Toronto:20220323T130000 LOCATION:Zoom SEQUENCE:0 SUMMARY:LLE: Ion Solubility\, Diffusivity\, and Transport in Charged Polyme r Membranes (Benny Freeman\, University of Texas at Austin) URL:https://chem-eng.utoronto.ca/event/lle-benny-freeman/ X-COST-TYPE:free X-ALT-DESC;FMTTYPE=text/html:\\n\\n
\\nExternal members are required to register to rec eive the link and passcode. Registration closed at 9am on March 21.
\nCo-hosted with the Institute for Water Innovation (IWI)
\nHost: P rof. Jay Werber
\n\n
Charged polymer membranes a re widely used for water purification applications involving control of wa ter and ion transport\, such as reverse osmosis and electrodialysis. Effo rts are also underway worldwide to harness separation properties of such m aterials for energy generation in related applications such as reverse ele ctrodialysis and pressure retarded osmosis. Additional applications\, suc h as energy recovery ventilation and capacitive deionization\, rely on pol ymer membranes to control transport rates of water\, ions\, or both. Impr oving membranes for such processes would benefit from more complete fundam ental understanding of the relation between membrane structure and ion sor ption\, diffusion and transport properties in both cation and anion exchan ge membrane materials. Ion-exchange membranes often contain strongly acidi c or basic functional groups that render the materials hydrophilic\, but t he presence of such charged groups also has a substantial impact on ion (a nd water) transport properties through the polymer.
\nWe are explori ng the influence of polymer backbone structure\, charge density\, and wate r content on ion transport properties. Results from some of these studies will be presented\, focusing on transport of salt\, primarily NaCl\, thro ugh various neutral\, positively charged and negatively charged membranes via concentration gradient driven transport (i.e.\, ion permeability) and electric field driven transport (i.e.\, ionic conductivity). One long-ter m goal is to develop and validate a common framework to interpret data fro m both electrically driven and concentration gradient driven mass transpor t in such polymers and to use it to establish structure/property relations leading to rational design of membranes with improved performance.
\n< p>Ion sorption and permeability data were used to extract salt diffusion c oefficients in charged membranes. Concentrations of both counter-ions and co-ions in the polymers were measured via desorption followed by ion chro matography or flame atomic absorption spectroscopy. Salt permeability\, s orption and electrical conductivity data were combined to determine indivi dual ion diffusion coefficients in neutral\, cation exchange and anion exc hange materials. Manning’s counter-ion condensation models and the Mackie/ Meares model were used to correlate and\, in some cases\, predict the expe rimental data.His research is described in more than 450 publicat ions and 30 patents/patent applications. He has co-edited 5 books on thes e topics. He has won a number of awards\, including a Fulbright Distingui shed Chair in Disruptive Separations (2017)\, Fellow of the North American Membrane Society (NAMS) (2017)\, the Distinguished Service Award from the Polymeric Materials: Science and Engineering (PMSE) Division of the Ameri can Chemical Society (ACS) (2015)\, Joe J. King Professional Engineering A chievement Award from The University of Texas (2013)\, American Institute of Chemical Engineers (AIChE) Clarence (Larry) G. Gerhold Award (2013)\, S ociety of Plastics Engineers International Award (2013)\, Roy W. Tess Awar d in Coatings from the PMSE Division of ACS (2012)\, the ACS Award in Appl ied Polymer Science (2009)\, AIChE Institute Award for Excellence in Indus trial Gases Technology (2008)\, and the Strategic Environmental Research a nd Development Program Project of the Year (2001). He is a Fellow of the AAAS\, AIChE\, ACS\, and the PMSE and IECR Divisions of ACS. He has serve d as chair of the PMSE Division of ACS\, chair of the Gordon Research Conf erence on Membranes: Materials and Processes\, President of the North Amer ican Membrane Society\, Chair of the Membranes Area of the Separations Div ision of the AIChE\, and Chair of the Separations Division of AIChE. His r esearch has served as the basis for several startup companies\, including Energy-X and NALA Systems.
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View the complete 2021-22 LLE schedule
\nQuestions? Please contact Delicia Ansalem\, Communications Officer & External Relatio
ns Liaison delicia.ansalem@ut
oronto.ca