Influence of Low and High Glycerol Concentrations on Wettability and Flexibility of Chitosan Biofilms

Pinto, Erveton Pinheiro; Tavares, Walter de Souza; Matos, Robert Saraiva; Ferreira, Adriana Maciel; Menezes, Rodrigo P.; Costa, M.E.H. Maia da; Souza, Tiago Marcolino de; Ferreira, Irlon M.; Sousa, Franscisco Fábio O. de; Zamora, R.R.M.

doi:10.21577/0100-4042.20170287

Cited by 13 publications

(7 citation statements)

References 16 publications

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“…This result was very similar to that found by Babaei-Ghazvini, Shahabi-Ghahfarrokhi, and Goudarzi (2018) for kefiran films (89.7 against 84.62 ). These results were lower values than those found for chitosan biofilms (Pinto et al, 2018;Silva & Reis, 2007), which is another biopolymer widely studied in regenerative medicine.…”

Section: Wettability Analysiscontrasting

confidence: 74%

Structural evaluation of polymeric microbial films grown on kefir loaded with Maytenus rigida extract

Silva

Matos

Estevam

et al. 2020

Microscopy Res & Technique

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Kefir is a probiotic that has several health promising properties. Its grains can form microbial films on different types of substrates. In the present work, the surface characteristics of kefir biofilms associated with Maytenus rigida Mart. extract were minutely studied. Three different concentrations of plant extract were included in the biofilm forming solutions, where fresh grains of kefir were inoculated. The results showed that the plant extract was successfully incorporated into the exopolysaccharide matrix of the biofilm. The main chemical components found linked to the plant extract were triterpenes. The crystallinity of biofilms increased with the addition of the plant extract. The morphology revealed that at low concentrations of the extract there was a prevalence of lactobacilli, while at high concentrations yeasts were more observed. Adhesion and wettability were higher for biofilm with less extract. These results revealed that a combination of plant extract and kefir's exopolysaccharide could form biofilms with chemical and topographic properties of great interest in regenerative medicine.

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Section: Wettability Analysiscontrasting

confidence: 74%

Structural evaluation of polymeric microbial films grown on kefir loaded with Maytenus rigida extract

Silva

Matos

Estevam

et al. 2020

Microscopy Res & Technique

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show abstract

“…Another important conclusion is that sugar concentration does not affect surface homogeneity. Biofilms with high surface uniformity were previously reported, e.g [3,39] . However, most important is the fact that the biofilms displayed microorganisms deposited on the surface, which can be considered excellent for their applicability, in addition to topographic parameters whose values suggest good wettability and surface adhesion.…”

Section: Afm and Advanced Fractal Analysismentioning

confidence: 95%

Nanoscale morphology, structure and fractal study of kefir microbial films grown in natura

et al. 2020

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“…In this sense, the calculation of these parameters was performed according to the proposed model by Ţălu, Abdolghaderi, et al 47 . Two algorithms programmed in R language developed by Pinto et al 48 . were used to determine these parameters, separately, in this paper.…”

Section: Methodsmentioning

confidence: 99%

Nanoscale morphology and fractal analysis of TiO₂ coatings on ITO substrate by electrodeposition

Amâncio

Pinto

Matos

et al. 2021

Journal of Microscopy

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In this paper, we introduced an advanced discussion of the 3D morphology of TiO2 coatings deposited on ITO substrate by electrodeposition under different deposition times. Atomic force microscopy was applied for obtaining topographic images of the samples. The images were processed using the MountainsMap 8.0 commercial software according to ISO 25178‐2:2012. Moreover, fractal theory was applied to study the surface microtexture of coatings. The morphology was affected by the deposition time, where the grain size decreased with the increase of the time, making film's surfaces smoother. In addition, the surface roughness exhibited a random behaviour, but does not presented significant difference between samples. The fractal dimension showed similar values for all coatings. In contrast, surface texture isotropy also exhibited random behaviour. However, advanced fractal parameters revealed that when the deposition time increased, the coatings microtexture has become uniform and less porous. Furthermore, all coatings presented high topographic uniformity, regardless of deposition time. These results revealed that the morphology and microtexture of TiO2‐based coatings can be controlled by the deposition time. Lay Description An advanced characterization on the micromorphology of 3D morphology, using AFM images, of Titanium dioxide (TiO2) coatings deposited on ITO substrate by electrodeposition under different deposition times. TiO2 is one of the most studied semiconductors to make photovoltaic devices. The versatility of this semiconductor is associated with low toxicity, high photochemical stability, abundance, and the facility to obtain by conventional synthesis routes. The obtention of a homogeneous and stable layer in the semiconductor TiO2 film deposition is a crucial stage in the assembly of sensitized photovoltaic devices. Atomic Force Microscopy (AFM) is a technique which can magnify up to a billion times and it uses a tip or probe which touches the sample surface point by point. The tip deflection is interpreted as the surface topography by the software, producing 2D or 3D images that generate several tribological parameters such as roughness in respect to a scanned area, has been a technique widely reported in the morphological characterization, determination of thickness, roughness, and particle size in thin films. Therefore, in this paper, the morphology was studied by atomic force microscopy using MountainsMap commercial software. The main goal was to study the influence of the deposition time on the morphology and microtexture of the material. New parameters such as surface entropy, fractal succolarity and fractal lacunarity were obtained for studying coatings microtexture's complexity.

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Influence of Low and High Glycerol Concentrations on Wettability and Flexibility of Chitosan Biofilms

Cited by 13 publications

References 16 publications

Structural evaluation of polymeric microbial films grown on kefir loaded with Maytenus rigida extract

Structural evaluation of polymeric microbial films grown on kefir loaded with Maytenus rigida extract

Nanoscale morphology, structure and fractal study of kefir microbial films grown in natura

Nanoscale morphology and fractal analysis of TiO₂ coatings on ITO substrate by electrodeposition

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Influence of Low and High Glycerol Concentrations on Wettability and Flexibility of Chitosan Biofilms

Cited by 13 publications

References 16 publications

Structural evaluation of polymeric microbial films grown on kefir loaded with Maytenus rigida extract

Structural evaluation of polymeric microbial films grown on kefir loaded with Maytenus rigida extract

Nanoscale morphology, structure and fractal study of kefir microbial films grown in natura

Nanoscale morphology and fractal analysis of TiO2 coatings on ITO substrate by electrodeposition

Contact Info

Product

Resources

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Nanoscale morphology and fractal analysis of TiO₂ coatings on ITO substrate by electrodeposition