Fluorescence confocal microscopy as effective testing method of polypropylene fibers and single polymer composites

Poszwa, Przemysław; Kędzierski, Kamil; Barszcz, Bolesław; Nowicka, Ariadna B.

doi:10.1016/j.polymertesting.2016.05.025

Cited by 9 publications

(6 citation statements)

References 28 publications

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“…Finally, Barbie #14 and 15 again have PVDC hair, whereas Barbie #13 has polypropylene (PP) hair, which is the reason for the green fluorescence emission when irradiated by UV light, as reported in paragraph 3.1 [ 45 ]. Characteristic peaks of PP can be observed at 2950, 2920, and 2870 cm −1 (C–H stretching), 1456 cm −1 (C–H bending), 1376 cm −1 (O–H bending), 1166 cm −1 (C=O stretching), 996, 973, 840, and 808 cm −1 (C=C bending) ( Figure 7 ) [ 46 ].…”

Section: Resultsmentioning

confidence: 94%

Mattel’s Barbie: Investigation of a Symbol—Analysis of Polymeric Matrices and Degradation Phenomena for Sixteen Dolls from 1959 to 1976

et al. 2022

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Mattel’s Barbie dolls are the most famous and iconic dolls since 1959. Today, they are being collected by individuals and often conserved in museum environments due to their cultural and historical significance reflecting everyday life and historical events. However, just like most museum objects made of plastics, both historical and more recent Barbies show evident degradation phenomena. Firstly, Barbies were made of plasticized polyvinyl chloride (PVC), affected by the migration of additives—mostly the plasticizers—from the bulk phase to the outermost layer, appearing as a tacky and glossy exudate. Over the years, Barbies’ polymeric constituents were replaced with more stable ones, whose additives migration is limited compared to PVC, even though still occurring. Multispectral photography in visible (VIS) and ultraviolet (UV) light, microscopical observations in VIS and UV light, and Fourier Transform Infrared spectroscopy in the Attenuated Total Reflectance mode (FT-IR ATR) were performed to characterize the constituent materials of 15 Barbies produced between 1959 and 1976, bridging the information gap on their processing over the years. The micro-invasive multi-analytical approach also allowed for the characterization of the degradation products, permitting the reference of the exudated compound to the specific bulk polymer.

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Section: Resultsmentioning

confidence: 94%

Mattel’s Barbie: Investigation of a Symbol—Analysis of Polymeric Matrices and Degradation Phenomena for Sixteen Dolls from 1959 to 1976

et al. 2022

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“…This technique was used to identify the presence and shape of the eugenyl acetate and it were encapsulated and experimental procedure were reported earlier (Poszwa et al 2016).…”

Section: Confocal Fluorescence Microscopymentioning

confidence: 99%

Encapsulation of eugenyl acetate in PHBV using SEDS technique and in vitro release evaluation

Loss

Pereira²,

Boschetto³

et al. 2016

J Food Sci Technol

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Eugenyl acetate obtained via enzymatic esterification using Lipozyme TL IM enzyme was encapsulated in biopolymer poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) through solution-enhanced dispersion by supercritical fluids (SEDS). Produced particles were characterized by SEM and confocal microscopy techniques and in addition in vitro release assays were performed in isopropanol and ethyl acetate. Experimental micronization conditions comprised 8 and 10 MPa, 308 and 313 K and eugenyl acetate concentration ranging from 5 to 20 mg mL, keeping PHBV concentration constant (20 mg mL in dichloromethane). The maximum encapsulation efficiency was 58.0 % for 5 mg mLof eugenyl acetate at 8 MPa and 308 K. The morphology of the encapsulated particles for most of the trials was spherical, with particle size ranging from 0.061 to 0.276 μm. Regarding the release in ethyl acetate and isopropanol solvents the higher the affinity of the encapsulated ester of these solvents, the faster the release was observed. These results demonstrate the importance of essential clove oil esterification reaction and encapsulation of the ester by SEDS method so that this encapsulated ester can be used in different industrial applications.

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“…. Also, confocal microscopy even if appears to be a suitable candidate, but it is not suitable for dynamic samples 36–38 . It is obvious that if one can obtain quantitatively the phase changes throughout the sample it can lead to the 3D information all around the sample.…”

Section: Introductionmentioning

confidence: 99%

“…Also, confocal microscopy even if appears to be a suitable candidate, but it is not suitable for dynamic samples. [36][37][38] It is obvious that if one can obtain quantitatively the phase changes throughout the sample it can lead to the 3D information all around the sample. Digital holographic microscopy (DHM) not only provides such task and overcomes the aforementioned shortcomings but also it can be used for real-time imaging of dynamic samples.…”

Section: Introductionmentioning

confidence: 99%

Digital holographic microscopy of spiropyran‐based dynamic materials

Jamali,

Rad,

Razaghi

et al. 2023

Journal of Microscopy

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Spiropyran (SP)‐based dynamic materials undergo structural changes in response to external stimuli. In this paper, we show that digital holographic microscopy (DHM) is an effective candidate for characterisation of SPs (embedded in polymer matrices) and for monitoring of their dynamical changes. The polymer matrices are polylactic acid (PLA) and poly(methyl methacrylate) (PMMA) films, which are decorated with SPs and immobilised on graphene quantum dots (GQDs). GQDs are modified by benzylamines prior to the loading of SP species because of the enhancement of hydrophobic characteristics. UV irradiation is used as the external stimulus and the dynamical changes of the samples before and after UV irradiation are measured. DHM is arranged on a novel self‐referencing setup, which substantially reduces the sensitivity of DHM to environmental vibrations. Morphometric information for characterisation of the samples is obtained by analysis of the recorded digital holograms. The experimental results demonstrate the potential of the presented technique to serve as an alternative technique for surface measurement methodologies such as atomic force microscope and stylus profiler for surface characterisation of similar materials.

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Fluorescence confocal microscopy as effective testing method of polypropylene fibers and single polymer composites

Cited by 9 publications

References 28 publications

Mattel’s Barbie: Investigation of a Symbol—Analysis of Polymeric Matrices and Degradation Phenomena for Sixteen Dolls from 1959 to 1976

Mattel’s Barbie: Investigation of a Symbol—Analysis of Polymeric Matrices and Degradation Phenomena for Sixteen Dolls from 1959 to 1976

Encapsulation of eugenyl acetate in PHBV using SEDS technique and in vitro release evaluation

Digital holographic microscopy of spiropyran‐based dynamic materials

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