Adley F. Rubira
Universidade Estadual de Maringá
Self-healing hydrogelsSupercritical fluidNuclear chemistryPolyelectrolyteNanoparticleCopolymerComposite materialFourier transform infrared spectroscopyNanotechnologyOrganic chemistryAqueous solutionChemistryPolymer chemistryMaterials scienceChitosanDrug deliveryVinyl alcoholGlycidyl methacrylateChemical engineeringPolymer
243Publications
40H-index
5,690Citations
Publications 247
Newest
#2Cátia S. NunesH-Index: 5
Last. André R. Fajardo (UFPEL: Universidade Federal de Pelotas)H-Index: 28
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Abstract Hydrogels based on biopolymers like Gum Arabic (GA) usually show low applicability due to weak mechanical properties. To overcome this issue, (nano)fillers are utilized as reinforcing agents. Here, GA hydrogels were reinforced by chitin nanowhiskers (CtNWs, aspect ratio of 14) isolated from the biopolymer chitin through acid hydrolysis. Firstly, GA was chemically modified with glycidyl methacrylate (GMA), which allowed its crosslinking by free radical reactions. Next, hydrogel samples c...
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#1Elizângela H. Fragal (RU: Rutgers University)H-Index: 8
#2Vanessa H. Fragal (RU: Rutgers University)H-Index: 8
Last. Tewodros Asefa (RU: Rutgers University)H-Index: 56
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Abstract Efficient metal-free or nonprecious metal-based electrocatalysts are currently needed for many renewable energy conversion and storage devices. In this work, transition metal-conjugated casein-derived nanoporous heteroatom-doped carbon electrocatalysts for the oxygen reduction reaction (ORR) and the hydrazine oxidation reaction (HzOR) in fuel cells are reported. The electrocatalysts are synthesized from casein (or dairy phosphoprotein) that is derived from milk past its shelf life. In t...
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#1Daniele M. Catori (UEM: Universidade Estadual de Maringá)H-Index: 1
#2Elizângela H. Fragal (UEM: Universidade Estadual de Maringá)H-Index: 8
Last. Adley F. Rubira (UEM: Universidade Estadual de Maringá)H-Index: 40
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Abstract Hydrogels based on pectin and cellulose nanocrystals (CNC) were used in our study to nucleation and growth of hydroxyapatite (HAp) by the biomimetic method. In this study, we evaluated the direct impact of the different percentages of CNC on pectin hydrogel and the influence of HAp obtained through two methods. CNC were obtained from HCl hydrolysis following chemical functionalization through vinyl groups. The percentage of CNC positively induces thermal stability, mechanical properties...
1 CitationsSource
1 CitationsSource
#1Luana Zulli Silva (UEM: Universidade Estadual de Maringá)
Last. Adley F. RubiraH-Index: 40
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Abstract Polymers containing amine moieties reduce Au(III) and stabilize gold nanoparticles (AuNPs). Such polymers can be used to synthesize AuNPs with controlled sizes and shapes, providing high stability to the colloidal solutions. A star amino-functionalized poly(glycidyl methacrylate) (PGMA) can quickly be prepared by epoxide ring-opening reactions. We functionalized the β-cyclodextrin-(PGMA)7 with diethanolamine (DEA) to create a star polymer (β-CD-(PGDEA)7) by atom transfer radical polymer...
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#1Vitor Oliveira (UTFPR: Federal University of Technology - Paraná)H-Index: 2
Last. Edvani C. Muniz (UTFPR: Federal University of Technology - Paraná)H-Index: 45
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The effects of the poly (vinyl alcohol): zinc acetate (PVA:AcZn) mass ratio on the morphology and structure of the precursor electrospun fibers as well as the calcination conditions on the morphology and chemical and physical structure of the as-obtained zinc oxide (ZnO) nanofibers are deeply discussed in this work. Initially, precursor nanofibers were obtained through electrospinning, a simple and accessible process for the production of materials in nano- and sub-micrometric scales, of aqueous...
1 CitationsSource
#2Vanessa H. FragalH-Index: 8
Last. Rafael SilvaH-Index: 22
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Abstract Magnetic microgels based on chitosan, modified with glycidyl methacrylate (GMA) and activated with folic acid (FA), and cobalt ferrite nanoparticles, modified with GMA (GMACoFe2O4), were synthesized by emulsion polymerization. The size of the round-shaped microgels, with and without GMACoFe2O4, ranged from (1.62 ± 0.38) μm to (1.71 ± 0.61) μm, respectively. Their release behavior was evaluated in the presence and absence of a magnetic field (MF), using vitamin-B12 as a model drug. In th...
3 CitationsSource
#1Vitor Oliveira (UTFPR: Federal University of Technology - Paraná)H-Index: 2
#2Fernanda RechotnekH-Index: 1
Last. Edvani C. Muniz (UTFPR: Federal University of Technology - Paraná)H-Index: 45
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Abstract Environmental pollution caused by heavy metals is a world concern, mainly because it can be accumulated in the human body, causing serious health problems. Thus, an accurate method to determine the concentration of heavy metals, lead (II) ions for instance, for water quality control is of great significance to the protection of the environment and human health. Herein, we reported the synthesis of a zinc oxide nanofibers/L-cysteine (ZnO_Lcys) nanocomposite and its use as electrodes for ...
4 CitationsSource