Mapping the distribution of components in formulated polymeric membranes using FTIR-ATR microscopy

Sammon, C; Boussetta, Sabrina; Melia, Colin D.

doi:10.1002/1521-3900(200208)184:1<357::aid-masy357>3.0.co;2-5

Cited by 4 publications

(3 citation statements)

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“…FTIRM is a transmission sampling method with a focus area of 20 × 300 µm. This size is necessary to get enough energy intensity for analysis (Sammon et al, 2002). Figure 7 shows the sample preparation and measuring procedure.…”

Section: Fourier Transform Infrared Microscopymentioning

confidence: 99%

“…The ATR crystal material has a high refractive index that reduces the effective wavelength of the infrared light by retardation. This improves the spatial resolution compared to FTIRM (Sammon et al, 2002). The penetration depth of the probing radiation is limited by its wavelength and the refractive indices of the ATR crystal and the polymer solution, resulting in an effective penetration depth of < 5 µm.…”

Section: Attenuated Total Reflectance-fourier Transform Infrared Spec...mentioning

confidence: 99%

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State-of-the-art review of porous polymer membrane formation characterization—How numerical and experimental approaches dovetail to drive innovation

et al. 2023

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Porous polymer membranes substantially contribute to an acceleration of sustainability transformation based on the energy efficient separation of liquid and gaseous mixtures. This rapid shift toward sustainable industrial processes leads to an increased demand for specifically tailored membranes. In order to predict membrane performance factors like permeability, selectivity and durability, the membrane formation process by film casting and phase inversion needs to be understood further. In recent years, computational models of the membrane formation process have been studied intensely. Their high spatial and temporal resolution allows a detailed quantitative description of phase inversion phenomena. New experimental techniques complement this development, as they provide quantitative data, e.g., on compositional changes of the polymer solution during membrane formation as well as the kinetic progression of the phase separation process. This state-of-the-art review compiles computational and experimental approaches that characterize the phase inversion process. We discuss how this methodological pluralism is necessary for improving the tailoring of membrane parameters, but that it is unlikely to be the way to the ultimate goal of a complete description of the evolution of the membrane structure from the initial demixing to the final solidification. Alternatively, we formulate an approach that includes a database of standardized and harmonized membrane performance data based on previously publicized data, as well as the application of artificial neural networks as a new powerful tool to link membrane production parameters to membrane performance.

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Section: Fourier Transform Infrared Microscopymentioning

confidence: 99%

Section: Attenuated Total Reflectance-fourier Transform Infrared Spec...mentioning

confidence: 99%

State-of-the-art review of porous polymer membrane formation characterization—How numerical and experimental approaches dovetail to drive innovation

et al. 2023

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“…[18][19][20][21][22] Microspectroscopic ATR applications include infrared mapping. [23][24][25][26] The diverse applications of the technique are due to the simplicity in sample preparation and the availability of accessories designed for solving specific problems. It appears that micro-ATR infrared spectroscopy is one of the few methods applicable for an in situ characterization of organic polymer coatings.…”

Section: Introductionmentioning

confidence: 99%

Application of Micro-Attenuated Total Reflectance Infrared Spectroscopy to Quantitative Analysis of Optical Fiber Coatings: Effects of Optical Contact

Stolov

Simoff

2006

Appl Spectrosc

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Micro-attenuated total reflectance (ATR) infrared spectroscopy is one of the few methods applicable for an in situ analysis of polymer coatings. In this method, the information is collected using an internal reflection element (IRE), which is brought into contact with the coated substrate. Perfect optical contact is hardly achievable for non-flat substrates and/or for those samples that cannot be well aligned with respect to the IRE. Consequently, the infrared peak intensities, their ratios, and all quantities calculated from the spectra become dependent upon the optical contact quality. In this work, we suggest a model that describes the peak intensities in terms of the optical contact. As an illustration, we apply this model to polymer-coated optical fibers. Relatively small diameters of tested fibers and their cylindrical shape result in imperfect optical contact between the sample and the IRE. Spectroscopic approaches of determining the degree of cure of polymer coatings are analyzed in view of the obtained results. Ways of minimizing the error induced by imperfect optical contact are suggested.

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Preparation and methodology for chemical mapping of sol–gel thin films containing lysozyme

Jürgen-Lohmann

Nacke

Legge

et al. 2009

J Sol-Gel Sci Technol

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Mapping the distribution of components in formulated polymeric membranes using FTIR-ATR microscopy

Cited by 4 publications

References 0 publications

State-of-the-art review of porous polymer membrane formation characterization—How numerical and experimental approaches dovetail to drive innovation

State-of-the-art review of porous polymer membrane formation characterization—How numerical and experimental approaches dovetail to drive innovation

Application of Micro-Attenuated Total Reflectance Infrared Spectroscopy to Quantitative Analysis of Optical Fiber Coatings: Effects of Optical Contact

Preparation and methodology for chemical mapping of sol–gel thin films containing lysozyme

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