Recent Prospects in the Inline Monitoring of Nanocomposites and Nanocoatings by Optical Technologies

Bugnicourt, Elodie; Kehoe, Timothy; Latorre, Marcos; Serrano, Cristina; Philippe, Severine; Schmid, Markus

doi:10.3390/nano6080150

Cited by 27 publications

(17 citation statements)

References 84 publications

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“…Different optical methods and measurement techniques [76,77,78,79] are used for evaluation of the surface treatment effect or dispersion level, respectively. However, the idea of this paper is to evaluate the effect of surface treatment and particle dispersion by measurement of dielectric responses by special measurement techniques, i.e., reduced resorption curves (RRCs) and voltage response method (VR), which evaluate the conditions of the dielectric materials during charging and discharging process.…”

Section: Surface Functionalization and Effect On Dielectric Propermentioning

confidence: 99%

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

et al. 2018

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Composite insulation materials are an inseparable part of numerous electrical devices because of synergy effect between their individual parts. One of the main aims of the presented study is an introduction of the dielectric properties of nanoscale magnesium oxide powder via Broadband Dielectric Spectroscopy (BDS). These unique results present the behavior of relative permittivity and loss factor in frequency and temperature range. Following the current trends in the application of inorganic nanofillers, this article is complemented by the study of dielectric properties (dielectric strength, volume resistivity, dissipation factor and relative permittivity) of epoxy-based composites depending on the filler amount (0, 0.5, 0.75, 1 and 1.25 weight percent). These parameters are the most important for the design and development of the insulation systems. The X-ray diffraction patterns are presented for pure resin and resin with optimal filler amount (1 wt %), which was estimated according to measurement results. Magnesium oxide nanoparticles were also treated by addition of silane coupling agent (γ-Glycidoxypropyltrimethoxysilane), in the case of optimal filler loading (1 wt %) as well. Besides previously mentioned parameters, the effects of surface functionalization have been observed by two unique measurement and evaluation techniques which have never been used for this evaluation, i.e., reduced resorption curves (RRCs) and voltage response method (VR). These methods (developed in our departments), extend the possibilities of measurement of composite dielectric responses related to DC voltage application, allow the facile comparability of different materials and could be used for dispersion level evaluation. This fact has been confirmed by X-ray diffraction analyses.

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Section: Surface Functionalization and Effect On Dielectric Propermentioning

confidence: 99%

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

et al. 2018

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“…Zink, J., Wyrobnik, T., Prinz, T. & Schmid, M. (2016). Physical, chemical and biochemical modifications of protein-based films and coatings: an extensive review.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

“…A recent approach to prolong the shelf life of fruits is the use of edible coatings combined with nanoparticles. The edible coatings can provide a semipermeable barrier to gases and water vapour, reducing respiration, and water loss (Ghidelli et al, 2014), and their mechanical and barrier properties can be enhanced by adding nanoparticles (Duncan, 2011), especially for gas permeability properties (Bugnicourt et al, 2016). Yu et al (2012) have reported that the mechanical properties and gas permeability of chitosan coatings were improved by adding nano-SiOx, and its composite coatings are remarkable on the preservation of the Sciaenops ocellatus (Sun et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Using soy protein SiOx nanocomposite film coating to extend the shelf life of apple fruit

Liu

et al. 2017

Int J of Food Sci Tech

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Preservation properties of soy protein isolate (SPI)/nano‐SiOx composite coatings to apple fruits were investigated. The sodium dodecyl sulfonate‐modified nano‐SiOx (SNS) particles were prepared by the ultrasonic method and the counter‐ion activation method, which products were designated as USNS and CSNS, respectively. The incorporation of CSNS particles was better than USNS to improve the preservation quality of the SPI film. The best conditions for the synthesis of the composite film were as follows: 10% SPI concentration, 0.3% nano‐SiOx dosage and coating time of 60 s. Under these conditions, the climacteric peak of apples was delayed to the fifth week. The apples also had better physiological indices than the control group. Nano‐SiOx particles were inlaid and evenly dispersed into the SPI film coatings. This work provides a simple CaCl2 pre‐activation method to produce SPI film coatings with good dispersion of nano‐SiOx particles for further preservation application of fresh fruits.

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“…The thickness and consistency of nanodeposited layers (nanocoatings) have a high impact on their performance [54]. Several studies [37,50,55] showed that the permeability Q poly+coat negatively correlates with the increasing thickness of the inorganic coating until a certain point.…”

Section: Importance Of Coating Thickness For Barrier Propertiesmentioning

confidence: 99%

Thickness Measurement Methods for Physical Vapor Deposited Aluminum Coatings in Packaging Applications: A Review

Lindner

Schmid

2017

Coatings

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Abstract:The production of barrier packaging materials, e.g., for food, by physical vapor deposition (PVD) of inorganic coatings such as aluminum on polymer substrates is an established and well understood functionalization technique today. In order to achieve a sufficient barrier against gases, a coating thickness of approximately 40 nm aluminum is necessary. This review provides a holistic overview of relevant methods commonly used in the packaging industry as well as in packaging research for determining the aluminum coating thickness. The theoretical background, explanation of methods, analysis and effects on measured values, limitations, and resolutions are provided. In industrial applications, quartz micro balances (QCM) and optical density (OD) are commonly used for monitoring thickness homogeneity. Additionally, AFM (atomic force microscopy), electrical conductivity, eddy current measurement, interference, and mass spectrometry (ICP-MS) are presented as more packaging research related methods. This work aims to be used as a guiding handbook regarding the thickness measurement of aluminum coatings for packaging technologists working in the field of metallization.

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Recent Prospects in the Inline Monitoring of Nanocomposites and Nanocoatings by Optical Technologies

Cited by 27 publications

References 84 publications

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

Using soy protein SiOx nanocomposite film coating to extend the shelf life of apple fruit

Thickness Measurement Methods for Physical Vapor Deposited Aluminum Coatings in Packaging Applications: A Review

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