NAMS 2002 Workshop - ICOM 2008

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Asymmetric Polymeric Membrane Formation – 3 Tuesday July 15, 10:00 AM-10:30 AM, Wai’anae Catalytic PVDF Microcapsules for Application in Fine Chemistry M. Buonomenna, ITM-CNR c/o UNiversity of Calabria, Italy, mg.buonomenna@itm.cnr.it A. Figoli (Speaker), ITM-CNR c/o UNICAL, Italy I. Spezzano, ITM-CNR, Italy E. Drioli, ITM-CNR, Italy Microcapsules have found numerous applications in various fields, such as pharmaceutical, chemical, textile, biomedical, environmental, petroleum and pesticide industries, and so on [1,2]. In particular, in the field of catalysis, when encapsulating a catalyst or enzyme, a potentially high interfacial specific area is created and the recovery of the catalyst is facilitated. The selective sorption through the membrane can further increase catalytic performances. In this study, we report on the preparation, characterization and use of new catalytic polymeric microcapsules for application in fine chemistry. The catalyst, ammonium molybdate tetrahydrate, was entrapped inside PVDF polymeric microcapsules during their preparation. Common techniques for fabricating hollow microcapsules with dense or porous membranes include interfacial polymerization, in situ polymerization [3-5], and phase inversion [6-8]. In particular, using phase inversion method, microcapsule membranes based on cellulose acetate (CA), ethylcellulose (EC) [9,10], polyethersulphone (PES) [11] and PEEKWC [12] characterized by pore microstructure both straight and packed throughout the whole membrane thickness were prepared. These morphological properties were obtained by using additives in the polymeric solutions as LiCl, PVP and PEG400 or acetone, alcohol, glycerin, or TEC in various ratio, that are responsible for an increase of demixing rate and for a more porous structure. In this communication, we will report on new PVDF catalytic microcapsules prepared by means of phase inversion induced by non-solvent without use of additives in the polymeric solutions to prevent catalyst deactivation. The developed catalytic microcapsules are featured with a reservoir-type porous microcapsule membrane structure and with numerous straight microchannels across the membrane. The hollow structure provided large space for immobilizing the catalyst inside the proposed microcapsule, and the straight microchannel structure across the membrane significantly reduced the mass transfer resistance [13]. The chemical-physical analysis of the new PVDF catalytic microcapsules was carried out by means of SEM, EDX, IR, DSC and XRD techniques. Catalytic activity of the PVDF catalytic microcapsules has been evaluated in the oxidation of aromatic alcohols to corresponding aldehydes in solvent free conditions. The polymeric microcapsules “keep in contact” the two phases: the organic phase, containing the substrate and the product, and the aqueous phase with the oxidant, H2O2. In this way, every microcapsule works as a catalytic membrane reactor with both the catalytic and contactor functions.
References [1] S. Benita, Microencapsulation: Methods and Industrial Applications, Marcel Dekker, New York, 1996. [2] A. Kondo, Microcapsule Processing and Technology, Marcel Dekker, New York, 1979. [3] L.-Y. Chu, S.-H. Park, T. Yamaguchi, S. Nakao, Langmuir 18 (<strong>2002</strong>) 1856. [4] Suryanarayana, P.S. Sai Prasad, Catal. Commun. 7 (2006) 245. [5] L. Yuan, G.Z. Liang, J.Q. Xie, L. Li, J. Guo, J. Mater. Sci 42 (2007) 4390. [6] C.Y. Wang, H.O. Ho, L.H. Lin, Y.K. Lin, M.T. Sheu, Int. J. Pharm. 297 (2005) 89. [7] A.G. Thombrea, J.R. Cardinal, A.R. DeNoto, S.M. Herbig, K.L. Smith, J. Control. Release 57 (1999) 55. [8] G.J. Wang, L.Y. Chu, M.Y. Zhou, W.M. Chen, J. Membr. Sci. 284 (2006) 301. [9] C.Y. Wang, H.O. Ho, L.H. Lin, Y.K. Lin, M.T. Sheu, Int. J. Pharm. 297 (2005) 89. [10] A.G. Thombrea, J.R. Cardinal, A.R. DeNoto, S.M. Herbig, K.L. Smith, J. Control. Release 57 (1999) 55. [11] G.J. Wang, L.Y. Chu, M.Y. Zhou, W.M. Chen, J. Membr. Sci. 284 (2006) 301. [12] A.Figoli, G. De Luca, E. Longavita, E.Drioli, Sep. Sci. Technol.42 (2007) 2809. [13] M.G. Buonomenna, A.Figoli, I. Spezzano, M. Davoli, E.Drioli, Applied Catalysis B: Environmental 80 (<strong>2008</strong>) 185.
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ICOM 2008 Oral Presentation Proceed
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Professor Yoram Cohen Professor Joh
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ICOM 2008 Staff: The University of
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ICOM 2008 Workshop Schedule: Saturd
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Monday, July 14 - Afternoon Session
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Tuesday, July 15 - Afternoon Sessio
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8:15AM 8:35AM EMS Barrer Prize (Mau
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Friday, July 18 - Morning Sessions
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Oral Presentation Abstracts Morning
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Gas Separation I - 1 - Keynote Mond
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esulting permeability selectivity o
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chain packing. To ensure a well pha
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Gas Separation I - 5 Monday July 14
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satisfactory way the corresponding
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Drinking and Wastewater Application
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an adjusted water management in the
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prospect for new energy sources as
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oxygen removal to the desired pH. C
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(Cl - , SO4 2- , As(V)) and water t
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[1] R. Lima de Miranda, J. Kruse, K
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Polymeric Membranes I - 4 Monday Ju
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Polymeric Membranes I - 5 Monday Ju
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Biomedical and Biotechnology I - 1
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Acknowledgments The Authors acknowl
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isolation of CD34+ cells was achiev
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membranes were then challenged with
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in crossflow mode operation were in
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hydroxide. For Mg/Ca = 0, the fouli
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improvement of filterability also t
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scale where fouling rates are commo
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observed in two subsequence phenome
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Membrane Modeling I - Fundamental A
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Membrane Modeling I - Fundamental A
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of the impact of the operating para
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Oral Presentation Abstracts Afterno
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Hybrid and Novel Processes I - 2 Mo
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Arora, M.B., J.A. Hestekin, S.W. Sn
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Conclusions Reverse electrodialysis
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energy recovery. This is a remarkab
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eaction with mediator due to the co
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Nanofiltration and Reverse Osmosis
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4.3x10 -6 to 7.4x10 -6 cm 2 /s. Bas
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The development of these membranes
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permeability, defined as water perm
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supports including charged (PSF/SPE
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[4] L. M. Robeson, Journal of Membr
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y conventional polymers and provide
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[3] P.M. Budd, K.J. Msayib, C.E. Ta
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Nanostructured Membranes I - 5 Mond
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Fuel Cells I - 1 Monday July 14, 2:
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investigated at first. As a result,
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Desalination I - 2 Monday July 14,
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Composite Polymeric Membrane Format
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NAMS Alan S. Michaels Award - 1a Tu
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NAMS Alan S. Michaels Award - 2 Tue
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opportunities for improving membran
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NAMS Alan S. Michaels Award - 4b Tu
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Page 149 and 150: Nanofiltration and Reverse Osmosis
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Page 173 and 174: than 10 nm. XRD data suggest that t
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Membrane Modeling II - Gas Separati
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[10] Wang BG, Lv HL, Yang JC. Chem
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Membrane and Surface Modification I
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Gas Separation III - 1 - Keynote We
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Gas Separation III - 2 Wednesday Ju
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separation was next blended with di
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Polymeric Membranes II - 1 - Keynot
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Polymeric Membranes II - 3 Wednesda
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5. Erdodi, G.; Kennedy, J. P.; Prog
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observed for different locations in
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Biomedical and Biotechnology II - 3
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applied in the first two fields wil
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distribution of SBMA units within t
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5500 ppm (15 mM) was lowered to 30
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increasing the effective size of th
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etween 0 and 1), the automatic feed
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Membrane Modeling III - Process Sim
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Membrane Modeling III - Process Sim
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models developed suggests that ther
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start level has a huge impact on th
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Ultra- and Microfiltration I - Tran
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all three binary protein UF systems
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Synthetic solutions of ±-lactalbum
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Gas Separation IV - 2 Thursday July
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6. T. C. Merkel, Z. He, I. Pinnau,
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EMS Barrer Prize - 1b Thursday July
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EMS Barrer Prize - 3 Thursday July
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EMS Barrer Prize - 4b Thursday July
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EMS Barrer Prize - 5 Thursday July
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therapy options have been modelled
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Ultra- and Microfiltration II - Pro
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in the vicinity of the rising bubbl
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of feed water ionic strength) on re
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technology that has gained growing
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Optimize polymeric membranes for sa
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Inorganic Membranes II - 2 Thursday
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confirms that the carbon dioxide pe
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permeability, stability issues comp
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Fuel Cells II - 2 Thursday July 17,
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5. Conclusion In this work, the evo
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Oral Presentation Abstracts Afterno
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an essentially pure H2 product is c
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In the presentation, we will presen
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was observed, indicative of the sim
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References Arora, M.B., J.A. Hestek
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performance of fibers is analyzed a
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Membrane Fouling III - RO & Biofoul
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Pervaporation and Vapor Permeation
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[4] H. Noureddini, Book of Abstract
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component (PX, OX) separation via p
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Generally these results were in goo
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introduction of methyl groups into
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separation quality (10 µS/cm) and
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Desalination II - 3 Thursday July 1
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drop are linearly related (although
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antiscalant oxidation has been limi
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oth 15±5 kDa, which suggests that
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Atomic Force Microscopy (AFM), and
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y single gas permeation experiments
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PDMS toplayers were only partially
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noting that cross-linking agents co
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such extended parameter space in th
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Hybrid Membranes - 6 Thursday July
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Plenary Lecture III Friday July 18.
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Gas Separation V - 1 - Keynote Frid
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References: [1] H. Lin, E. Van Wagn
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elative contributions of Fickian di
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Gas Separation V - 4 Friday July 18
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Gas Separation V - 6 Friday July 18
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Electron Microscopy (TEM) analyses
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- Hybrid RO train: A hybrid RO trai
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concentration as well as on the sod
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scaling deposits in the DCMD device
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Silica colloidal solution with diff
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Membrane Fouling IV - RO & Desalina
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Polyacrylonitrile (PAN) UF membrane
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the polymer dope was PEI (12 wt%),
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Inorganic Membranes III - 1 - Keyno
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Inorganic Membranes III - 2 Friday
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CO2/H2 selectivity at high temperat
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ammonia complexes in aqueous soluti
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possible to have a membrane capable
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fired boiler flue gas, SOx and merc
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EPR/Ago/p-benzoquinone composite sh
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elated to the presence of free elec
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surroundings. When the temperature
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that no absorbent was detected in t
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days of filtration from 120 to 7-10
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was performed to restore membrane f
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with the SRT of 65 days, no correla
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Results Critical flux measurements
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MLSS is not directly proportional t
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Fuel Cells III - 2 Friday July 18,
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Fuel Cells III - 4 Friday July 18,
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Ultra- and Microfiltration III - Me
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can be deduced from the imaginary p
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membranes. The analysis of the ligh
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Membrane Contactors - 2 Friday July
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absorption liquid in the pores of t
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Packaging and Barrier Materials - 1
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Historically, all the approaches de
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