Publications

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A
Aguiar-Ricardo A, Duarte CMM, Ponte MND, Marsh KN, Stølen S. Properties of mixing. Vol. 6.; 2003. AbstractWebsite
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Aguiar-Ricardo A, Temtem M, Casimiro T, Ribeiro N. "A visual acoustic high-pressure cell for the study of critical behavior of nonsimple mixtures." Review of Scientific Instruments. 2004;75(10 I):3200-3202. AbstractWebsite
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Aguiar-Ricardo A, Casimiro T, Costa T, Leandro J, Ribeiro N. "Visual and acoustic investigation of the critical behavior of mixtures of CO2 with a perfluorinated polyether." Fluid Phase Equilibria. 2006;239(1):26-29. AbstractWebsite
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B
Barroso T, Roque ACA, Aguiar-Ricardo A. "Bioinspired and sustainable chitosan-based monoliths for antibody capture and release." RSC Advances. 2012;2(30):11285-11294. AbstractWebsite
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Barroso T, Temtem M, Hussain A, Aguiar-Ricardo A, Roque ACA. "Preparation and characterization of a cellulose affinity membrane for human immunoglobulin G (IgG) purification." Journal of Membrane Science. 2010;348(1-2):224-230. AbstractWebsite
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Barroso T, Viveiros R, Costa E, Temtem M, Casimiro T, Aguiar-Ricardo A. "Development of switchable "smart" biomaterials using an environmental friendly technology.". In: Materials Research Society Symposium Proceedings. Vol. 1220.; 2010:. Abstract
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Barroso T, Hussain A, Roque ACA, Aguiar-Ricardo A. "Functional monolithic platforms: Chromatographic tools for antibody purification." Biotechnology Journal. 2013;8(6):671-681. AbstractWebsite
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Barroso T, Temtem M, Casimiro T, Aguiar-Ricardo A. "Development of pH-responsive poly(methylmethacrylate-co-methacrylic acid) membranes using scCO2 technology. Application to protein permeation." Journal of Supercritical Fluids. 2009;51(1):57-66. AbstractWebsite
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Barroso T, Viveiros R, Coelho M, Casimiro T, Botelho do Rego AM, Aguiar-Ricardo A. "Influence of poly(N-isopropylacrylamide) and poly(N,N′-diethyl acrylamide) coatings on polysulfone/polyacrylonitrile-based membranes for protein separation." Polymers for Advanced Technologies. 2012;23:1381-1393. AbstractWebsite

Herein we describe the design and the assembly of temperature sensitive polysulfone (PS)/polyacrylonitrile (PAN) blend membranes using supercritical fluid technology. Blended membranes were prepared using the CO2-assisted phase inversion method, and their pores were coated with two thermoresponsive hydrogels-poly(N-isopropylacrylamide) (PNIPAAm) and poly(N,N′-diethylacrylamide) (PDEAAm). Permeation experiments of bovine serum albumin (BSA) and lysozyme (LYS) solutions were used to evaluate the performance and temperature-responsive behavior of coated membranes. While membranes coated with PNIPAAm presented similar protein permeation profiles at temperatures below and above its lower critical solution temperature, PDEAAm coating imparted a temperature-responsive behavior to PS/PAN (90:10) membranes and selective permeation of proteins with different sizes. Copyright © 2011 John Wiley & Sons, Ltd.

Barroso T, Temtem M, Casimiro T, Aguiar-Ricardo A. "Antifouling performance of poly(acrylonitrile)-based membranes: From green synthesis to application." Journal of Supercritical Fluids. 2011;56(3):312-321. AbstractWebsite
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Barroso T, Viveiros R, Temtem M, Casimiro T, Botelho do Rego AM, Aguiar-Ricardo A. "A Combined Strategy to Surface-Graft Stimuli-Responsive Hydrogels Using Plasma Activation and Supercritical Carbon Dioxide." ACS Macro Letters. 2012;1:356-360. AbstractWebsite

Differently shaped polymeric matrices were efficiently coated with stimuli-responsive hydrogels for a wide range of applications using a new methodology. By combining plasma surface activation and polymerization in supercritical media at mild conditions, we report the direct smart coating of microcarriers and membranes in gram-scale quantities with a scalable, green, and low-cost approach.

Bonifácio VDB, Correia VG, Pinho MG, Lima JC, Aguiar-Ricardo A. "Blue emission of carbamic acid oligooxazoline biotags." Materials Letters. 2012;81:205-208. AbstractWebsite
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Brás ARE, Casimiro T, CALDEIRA J, Aguiar-Ricardo A. "Solubility of the nematic liquid crystal E7 in supercritical carbon dioxide." Journal of Chemical and Engineering Data. 2005;50(6):1857-1860. AbstractWebsite
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Brás ARE, Henriques S, Casimiro T, Aguiar-Ricardo A, Sotomayor J, CALDEIRA J, Santos C, Dionísio M. "Characterization of a nematic mixture by reversed-phase HPLC and UV spectroscopy: An application to phase behaviour studies in liquid crystal-CO2 systems." Liquid Crystals. 2007;34(5):591-597. AbstractWebsite
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C
Casimiro T, Banet-Osuna AM, Ramos AM, da Ponte MN, Aguiar-Ricardo A. "Synthesis of highly cross-linked poly(diethylene glycol dimethacrylate) microparticles in supercritical carbon dioxide." European Polymer Journal. 2005;41(9):1947-1953. AbstractWebsite
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Casimiro T, Montilla F, Garcia S, Avilés T, Raeissi S, Shariati A, Peters CJ, Nunes Da Ponte M, Aguiar-Ricardo A. "Phase behaviour of the catalyst dicarbonyl(η5- cyclopentadienyl)-cobalt in carbon dioxide." Journal of Supercritical Fluids. 2004;31(1):1-8. AbstractWebsite
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Casimiro T, Shariati A, Peters CJ, da Ponte MN, Aguiar-Ricardo A. "Phase behavior studies of a perfluoropolyether in high-pressure carbon dioxide." Fluid Phase Equilibria. 2005;228-229:367-371. AbstractWebsite
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Casimiro T, Shariati A, Peters CJ, De Ponte MN, Aguiar-Ricardo A. "Phase behavior studies of a perfluoropolyether in high-pressure carbon dioxide." Fluid Phase Equilibria. 2004;224(2):257-261. AbstractWebsite
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Correia VG, Bonifácio VD, Raje VP, Casimiro T, Moutinho G, da Silva CL, Pinho MG, Aguiar-Ricardo A. "Oxazoline-Based Antimicrobial Oligomers: Synthesis by CROP Using Supercritical CO 2." Macromolecular Bioscience. 2011;11(8):1128-1137. AbstractWebsite
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Correia VG, Coelho M, Barroso T, Raje VP, Bonifácio VDB, Casimiro T, Pinho MG, Aguiar-Ricardo A. "Anti-biofouling 3D porous systems: the blend effect of oxazoline-based oligomers on chitosan scaffolds." Biofouling. 2013;29(3):273-282. AbstractWebsite
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Costa E, Lloyd MM, Chopko C, Aguiar-Ricardo A, Hammond PT. "Tuning Smart Microgel Swelling and Responsive Behavior through Strong and Weak Polyelectrolyte Pair Assembly." LangmuirLangmuir. 2012;28(26):10082-10090. AbstractWebsite

The layer-by-layer (LbL) assembly of polyelectrolyte pairs on temperature and pH-sensitive cross-linked poly(N-isopropylacrylamide)-co-(methacrylic acid), poly(NIPAAm-co-MAA), microgels enabled a fine-tuning of the gel swelling and responsive behavior according to the mobility of the assembled polyelectrolyte (PE) pair and the composition of the outermost layer. Microbeads with well-defined morphology were initially prepared by synthesis in supercritical carbon dioxide. Upon LbL assembly of polyelectrolytes, interactions between the multilayers and the soft porous microgel led to differences in swelling and thermoresponsive behavior. For the weak PE pairs, namely poly(l-lysine)/poly(l-glutamic acid) and poly(allylamine hydrochloride)/poly(acrylic acid), polycation-terminated microgels were less swollen and more thermoresponsive than native microgel, whereas polyanion-terminated microgels were more swollen and not significantly responsive to temperature, in a quasi-reversible process with consecutive PE assembly. For the strong PE pair, poly(diallyldimethylammonium chloride)/poly(sodium styrene sulfonate), the differences among polycation and polyanion-terminated microgels are not sustained after the first PE bilayer due to extensive ionic cross-linking between the polyelectrolytes. The tendencies across the explored systems became less noteworthy in solutions with larger ionic strength due to overall charge shielding of the polyelectrolytes and microgel. ATR FT-IR studies correlated the swelling and responsive behavior after LbL assembly on the microgels with the extent of H-bonding and alternating charge distribution within the gel. Thus, the proposed LbL strategy may be a simple and flexible way to engineer smart microgels in terms of size, surface chemistry, overall charge and permeability.The layer-by-layer (LbL) assembly of polyelectrolyte pairs on temperature and pH-sensitive cross-linked poly(N-isopropylacrylamide)-co-(methacrylic acid), poly(NIPAAm-co-MAA), microgels enabled a fine-tuning of the gel swelling and responsive behavior according to the mobility of the assembled polyelectrolyte (PE) pair and the composition of the outermost layer. Microbeads with well-defined morphology were initially prepared by synthesis in supercritical carbon dioxide. Upon LbL assembly of polyelectrolytes, interactions between the multilayers and the soft porous microgel led to differences in swelling and thermoresponsive behavior. For the weak PE pairs, namely poly(l-lysine)/poly(l-glutamic acid) and poly(allylamine hydrochloride)/poly(acrylic acid), polycation-terminated microgels were less swollen and more thermoresponsive than native microgel, whereas polyanion-terminated microgels were more swollen and not significantly responsive to temperature, in a quasi-reversible process with consecutive PE assembly. For the strong PE pair, poly(diallyldimethylammonium chloride)/poly(sodium styrene sulfonate), the differences among polycation and polyanion-terminated microgels are not sustained after the first PE bilayer due to extensive ionic cross-linking between the polyelectrolytes. The tendencies across the explored systems became less noteworthy in solutions with larger ionic strength due to overall charge shielding of the polyelectrolytes and microgel. ATR FT-IR studies correlated the swelling and responsive behavior after LbL assembly on the microgels with the extent of H-bonding and alternating charge distribution within the gel. Thus, the proposed LbL strategy may be a simple and flexible way to engineer smart microgels in terms of size, surface chemistry, overall charge and permeability.

Costa E, De-Carvalho J, Casimiro T, da Silva CL, Cidade MT, Aguiar-Ricardo A. "Tailoring thermoresponsive microbeads in supercritical carbon dioxide for biomedical applications." Journal of Supercritical Fluids. 2011;56(3):292-298. AbstractWebsite
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Costa E, Coelho M, Ilharco LM, Aguiar-Ricardo A, Hammond PT. "Tannic acid mediated suppression of PNIPAAm microgels thermoresponsive behavior." Macromolecules. 2011;44(3):612-621. AbstractWebsite
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D
Da Silva MS, Viveiros R, Morgado PI, Aguiar-Ricardo A, Correia IJ, Casimiro T. "Development of 2-(dimethylamino)ethyl methacrylate-based molecular recognition devices for controlled drug delivery using supercritical fluid technology." International Journal of Pharmaceutics. 2011;416(1):61-68. AbstractWebsite
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