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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Alves, N. M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (40/40 displayed)
- 2022The potential of beeswax colloidal emulsion/films for hydrophobization of natural fibers prior to NTRM manufacturingcitations
- 20213D printing of graphene-based polymeric nanocomposites for biomedical applicationscitations
- 20213D‐printed cryomilled poly(ε‐caprolactone)/graphene composite scaffolds for bone tissue regenerationcitations
- 2021Polymeric biomaterials inspired by marine mussel adhesive proteinscitations
- 2021Poly(lactic acid)/graphite nanoplatelet nanocomposite filaments for ligament scaffoldscitations
- 2020Biodegradable polymer nanocomposites for ligament/tendon tissue engineeringcitations
- 2020Layer-by-layer films based on catechol-modified polysaccharides produced by dip- and spin-coating onto different substratescitations
- 2018Novel antibacterial and bioactive silicate glass nanoparticles for biomedical applicationscitations
- 2018Graphene‐polymer nanocomposites for biomedical applicationscitations
- 2017Nacre-inspired nanocomposites produced using layer-by-layer assembly: design strategies and biomedical applicationscitations
- 2016Antibacterial bioadhesive layer-by-layer coatings for orthopedic applicationscitations
- 2015pH Responsiveness of Multilayered Films and Membranes Made of Polysaccharidescitations
- 2014Homogeneous poly (L-lactic acid)/chitosan blended filmscitations
- 2014Inclusion complexes of α-cyclodextrins with poly(d,l-lactic acid) : structural, characterization, and glass transition dynamicscitations
- 2013Development of new poly(ϵ-caprolactone)/chitosan filmscitations
- 2013Chitosan membranes containing micro or nano-size bioactive glass particles: evolution of biomineralization followed by in-situ dynamic mechanical analysiscitations
- 2013Biomineralization in chitosan/Bioglass® composite membranes under different dynamic mechanical conditionscitations
- 2012Surfaces Inducing Biomineralization
- 2012Membranes of poly(D,L-lactic acid)/Bioglass® with asymmetric bioactivity for biomedical applicationscitations
- 2011Chitosan/Poly(epsilon-caprolactone) blend scaffolds for cartilage repaircitations
- 2011Polymer Patterns and Scaffolds for Biomedical Applications and Tissue Engineering
- 2010Controlling cell behavior through the design of polymer surfacescitations
- 2010Designing biomaterials based on biomineralization of bonecitations
- 2008Study of protein adsorption onto biodegradable marine origin polyelectrolyte multilayer films followed in-situ with QCM-D
- 2007Thermally responsive biomineralization on biodegradable substratescitations
- 2007In vitro monitoring of surface mechanical properties of poly(L-lactic acid) using microhardnesscitations
- 2007Microhardness of starch based biomaterials in simulated physiological conditionscitations
- 2007Glass transition of semi-crystalline PLLA with different morphologies as studied by dynamic mechanical analysiscitations
- 2005Glass transition dynamics and structural relaxation of PLLA studied by DSC : Influence of crystallinitycitations
- 2005Study of the molecular mobility in polymers with the thermally stimulated recovery technique : a reviewcitations
- 2005Enthalpy relaxation studies in polymethyl methacrylate networks with different crosslinking degreescitations
- 2004Departure from the vogel behaviour in the glass transition region-thermally stimulated recovery, creep and dynamic mechanical analysis studiescitations
- 2004Morphology and mechanical properties of injection molded poly(ethylene terephtalate)citations
- 2004Departure from the Vogel behaviour in the glass transition - thermally stimulated recovery, creep and dynamic mechanical analysis studiescitations
- 2004Viscoelastic behaviour of polymethyl methacrylate networks with different crosslinking degreescitations
- 2004Viscoelastic behavior of poly(methyl methacrylate) networks with different cross-linking degreescitations
- 2003Study of the viscoelastic properties of PET by thermally stimulated recoverycitations
- 2002The dynamics of the glass transition in a semicrystalline PET studied by mechanical and dielectric spectroscopic methods
- 2002Molecular mobility in polymers studied with thermally stimulated recovery : I. experimental procedures and data treatmentcitations
- 2001Molecular mobility in a thermoset as seen by TSR and DMA near Tgcitations
Places of action
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article
pH Responsiveness of Multilayered Films and Membranes Made of Polysaccharides
Abstract
We investigated the pH-dependent properties of multilayered films made of chitosan (CHI) and alginate (ALG) and focused on their postassembly response to different pH environments using a quartz crystal microbalance with dissipation monitoring (QCM-D), swelling studies, ζ potential measurements, and dynamic mechanical analysis (DMA). In an acidic environment, the multilayers presented lower dissipation values and, consequently, higher moduli when compared with the values obtained for the pH used during the assembly (5.5). When the multilayers were exposed to alkaline environments, the opposite behavior occurred. These results were further corroborated by the ability of this multilayered system to exhibit a reversible swellingâ deswelling behavior within the pH range from 3 to 9. The changes in the physicochemical properties of the multilayer system were gradual and different from those of individual solubilized polyelectrolytes. This behavior is related to electrostatic interactions between the ionizable groups combined with hydrogen bonding and hydrophobic interactions. Beyond the pH range of 3â 9, the multilayers were stabilized by genipin cross-linking. The multilayered films also became more rigid while the pH responsiveness conferred by the ionizable moieties of the polyelectrolytes was preserved. This work demonstrates the versatility and feasibility of LbL methodology to generate inherently pH stimulus-responsive nanostructured films. Surface functionalization using pH responsiveness endows several biomedical applications with abilities such as drug delivery, diagnostics, microfluidics, biosensing, and biomimetic implantable membranes. ; We acknowledge the financial support from the Portuguese Foundation for Science and Technology (FCT) through the doctoral and postdoctoral grants with reference numbers SFRH/BD/81372/2011 (J.M.S.), SFRH/BPD/96797/2013 (S.G.C.), and SFRH/BPD/95446/2013 (R.R.C.). This work was financially supported by the Foundation for Science and Technology (FCT) via Project ...