Valdir Soldi
Universidade Federal de Santa Catarina
MicelleAnalytical chemistryNuclear chemistryDynamic light scatteringInfrared spectroscopyNanoparticleCopolymerComposite materialOrganic chemistryChemistryPolymer blendPolymer chemistryMaterials scienceDifferential scanning calorimetryThermogravimetryChemical engineeringChromatographyPolymerStarchThermal stabilityThermogravimetric analysis
148Publications
34H-index
3,400Citations
Publications 148
Newest
#1Tatiane Michele Popiolski (UFSC: Universidade Federal de Santa Catarina)H-Index: 1
Last. Valdir Soldi (UFSC: Universidade Federal de Santa Catarina)H-Index: 34
view all 3 authors...
Neste estudo foi avaliada a atividade antibacteriana de fibras texteis contendo nanoparticulas de poli(oxido de etileno-b-acido latico) com oleos essenciais incorporados. O sistema desenvolvido demonstrou atividade antibacteriana contra Staphylococcus aureus, sugerindo seu potencial uso como agente antibacteriano. Foram utilizados copolimeros dibloco baseados em um bloco fixo de PEO (5kDa) e dois segmentos de PLA diferentes (4,5 e 10kDa). A morfologia, a eficiencia do encapsulamento, a interacao...
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1 CitationsSource
#1Andrea Granada (UGA: University of Grenoble)H-Index: 1
#1Andrea Ferreira Granada (CNRS: Centre national de la recherche scientifique)H-Index: 1
Last. Redouane Borsali (CNRS: Centre national de la recherche scientifique)H-Index: 38
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Nanoparticles based on block copolymers of oligosaccharides [β-cyclodextrin (βCyD) and maltoheptaose (Mal7)] and poly(e-caprolactone) (PCL) were prepared by microphase inversion method. Zeta-potential, particle size measurements and morphological analysis of drug-free and drug-loaded nanoparticles were performed by using, respectively, laser-doppler anemometry, dynamic and static light scattering and transmission electron microscopy. ρ-Ratio values were correlated with transmission electron micr...
2 CitationsSource
#1Samira Jamil Fayad (UFSC: Universidade Federal de Santa Catarina)H-Index: 2
#2Edson Minatti (UFSC: Universidade Federal de Santa Catarina)H-Index: 14
Last. Redouane Borsali (CNRS: Centre national de la recherche scientifique)H-Index: 38
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Abstract This work describes how nanostructured thin films obtained from the self-assembly of block copolymers (BCPs) systems can be used as a nanoelectrode array (NEA) that can be programmed to specifically detect targeted molecules. Namely, poly(styrene-b-methacrylate) (PS-b-PMMA) thin films, after removal of PMMA phase, produced regular spaced 560 pores μm-2 with 16 nm of diameter. The nanopores were then chemically modified by the introduction of β-cyclodextrin (β-CD) molecules. By using the...
5 CitationsSource
This paper discusses the feasibility of using membranes based on cellulose acetate butyrate/poly(caprolactone)triol loaded with doxycycline for guided bone regeneration. Those membranes were obtained by solvent casting varying the cellulose acetate butyrate: poly(caprolactone)triol:doxycycline (CAB:PCL-T:DOX) mass ratios and characterized by scanning electron microscopy, differential scanning calorimetry, dynamical mechanical analysis, swelling and weight loss, drug release, in vitro antimicrobi...
9 CitationsSource
#1Silvia Maria Martelli (UFSC: Universidade Federal de Santa Catarina)H-Index: 11
#2Caroline Motta (UFSC: Universidade Federal de Santa Catarina)H-Index: 1
Last. Valdir Soldi (UFSC: Universidade Federal de Santa Catarina)H-Index: 34
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Abstract Edible carboxymethyl cellulose films containing α-tocopherol (TC) and a mixture of polysorbate 80 (T80) and lecithin were prepared and characterized physicochemically. The stability of TC into the CMC matrix over time, the physicochemical properties of the films, in vitro release profile of TC from films and its antioxidant capacity were investigated. Films containing each one or both surfactants were more homogenous and no phase separation was observed during the drying. TC-loaded CMC ...
31 CitationsSource
#1Tatiane Michele Popiolski (UFSC: Universidade Federal de Santa Catarina)H-Index: 1
#2Issei OtsukaH-Index: 24
Last. Redouane BorsaliH-Index: 38
view all 6 authors...
Nanoparticles comprised of the poly(ethylene oxide)-b-poly (lactic acid) diblock copolymer (PEO-b-PLA) with and without the incorporation of lavender oil were prepared by nanoprecipitation. Diblock copolymers based on a fixed PEO block (5KDa) and two different PLA segments (4.5 or 10KDa) were used. The morphology, encapsulation efficiency, essential oil-polymer interaction and the release kinetics of the active agent in the nanoparticles, were evaluated. The hydrodynamic radius of the nanopartic...
7 CitationsSource
A aplicacao de polimeros biodegradaveis para encapsular pesticidas e uma estrategia que permite, a partir de diferentes proporcoes entre os polimeros, modificar o perfil de liberacao do agente. Este trabalho avaliou a liberacao controlada do pesticida cipermetrina encapsulado em microesferas de blendas de P(3HB)/PCL (100/0, 0/100, 97/03, 95/05, 90/10, 80/20 e 70/30) obtidas pelo metodo de emulsificacao-evaporacao do solvente. As imagens de microscopia eletronica de varredura revelam a forte infl...
1 CitationsSource
#2Issei OtsukaH-Index: 24
Last. Redouane BorsaliH-Index: 38
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This paper discusses the self-assembly of oligosaccharide-containing block copolymer and the use of ultraviolet (UV) to obtain nanoporous glyco-nanoparticles by photodegradation of the synthetic polymer block. Those glyco-nanoparticles consisting of oligosaccharide-based shell and a photodegradable core domain were obtained from the self-assembly of maltoheptaose-block-poly(methyl methacrylate) (MH-b-PMMA48) using the nanoprecipitation protocol. MH-b-PMMA48 self-assembled into well-defined spher...
4 CitationsSource
#1Andrea Mariela Araya-Sibaja (UCR: University of Costa Rica)H-Index: 7
#2Valdir Soldi (UFSC: Universidade Federal de Santa Catarina)H-Index: 34
Last. Silvia Lucia Cuffini (UNIFESP: Federal University of São Paulo)H-Index: 18
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The selective crystallization of progesterone polymorphs prepared by Polymer-Induced Heteronucleation (PIHn) method was investigated. Polyvinyl alcohol (PVA), hydroxypropyl methylcellulose (HPMC), dextran, gelatin, polyisoprene (PI), and acrylonitrile/butadiene copolymer (NBR) were used as heteronucleants. Crystallizations were conducted from 0.5, 10 and 40 mg mL−1 solutions in chloroform at room temperature by solvent evaporation. The samples were characterized by X-ray powder diffraction, diff...
8 CitationsSource