Simple method for the quantitative analysis of thin copolymer films on substrates by infrared spectroscopy using direct calibration

Tazreiter, Martin; Christian, Paul; Schennach, Robert; Grießer, Thomas; Coclite, Anna Maria

doi:10.1039/c7ay01748k

Cited by 10 publications

(10 citation statements)

References 47 publications

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“…The results are in agreement with successful polymerization also reported in previous studies. 30 , 31 X-ray photoelectron spectroscopy (XPS) was also used as an additional tool to verify the retention of the PFDA functional groups. Both FT-IR and XPS spectra are reported in the Supporting Information .…”

Section: Resultsmentioning

confidence: 99%

Growth Regimes of Poly(perfluorodecyl acrylate) Thin Films by Initiated Chemical Vapor Deposition

et al. 2018

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Control over thin film growth (e.g., crystallographic orientation and morphology) is of high technological interest as it affects several physicochemical material properties, such as chemical affinity, mechanical stability, and surface morphology. The effect of process parameters on the molecular organization of perfluorinated polymers deposited via initiated chemical vapor deposition (iCVD) has been previously reported. We showed that the tendency of poly(1H,1H,2H,2H-perfluorodecyl acrylate) (pPFDA) to organize in an ordered lamellar structure is a function of the filament and substrate temperatures adopted during the iCVD process. In this contribution, a more thorough investigation of the effect of such parameters is presented, using synchrotron radiation grazing incidence and specular X-ray diffraction (GIXD and XRD) and atomic force microscopy (AFM). The parameters influencing the amorphization, mosaicity, and preferential orientation are addressed. Different growth regimes were witnessed, characterized by a different surface structuring and by the presence of particular crystallographic textures. The combination of morphological and crystallographic analyses allowed the identification of pPFDA growth possibilities between island or columnar growth.

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Section: Resultsmentioning

confidence: 99%

Growth Regimes of Poly(perfluorodecyl acrylate) Thin Films by Initiated Chemical Vapor Deposition

et al. 2018

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“…FT-IR spectra (4 cm −1 resolution, in the range 800-4000 cm −1 ) were obtained in transmission mode with a Bruker IFS 66 v/s spectrometer. Data were processed with OriginPro and a software developed by M. Tazreiter et al [24], allowed for the determination of crosslinker content in the coatings.…”

Section: Samples Characterizationmentioning

confidence: 99%

“…The copolymer spectrum was fitted with a linear combination of the corresponding homopolymer absorbance spectra, following the routine explained in ref. [24] The evaluated composition in terms of crosslinker percentage is reported in Figure 1.…”

Section: Characterization Of the Icvd Coatings On Bare Substratesmentioning

confidence: 99%

Initiated Chemical Vapor Deposition of Crosslinked Organic Coatings for Controlling Gentamicin Delivery

et al. 2020

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A coating consisting of a copolymer of methacrylic acid and ethylene glycol dimethacrylate was deposited over a gentamicin film by initiated chemical vapor deposition with the aim of controlling the drug release. Gentamicin release in water was monitored by means of conductance measurements and of UV-vis Fluorescence Spectroscopy. The influence of the polymer chemical composition, specifically of its crosslinking density, has been investigated as a tool to control the swelling behavior of the initiated chemical vapor deposition (iCVD) coating in water, and therefore its ability to release the drug. Agar diffusion test and microbroth dilution assays against Staphylococcus aureus and Pseudomonas aeruginosa on cellulose coated substrates confirmed that the antibacterial activity of the drug released by the coating was retained, though the release of gentamicin was not complete.

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“…From the fitting of the polymer spectrum with monomer spectra of HEMA and EGDMA, we calculated a chemical composition of 10 ± 2% EGDMA and 90 ± 2% HEMA, as evaluated via program IR_fitter. 33 , 34 …”

Section: Resultsmentioning

confidence: 99%

“…This program allows for the quantification of the amount of each monomer in the copolymer film from the linear combination of the single monomer spectra. Details on this procedure can be found elsewhere …”

Section: Methodsmentioning

confidence: 99%

Deposition of Ion-Conductive Membranes from Ionic Liquids via Initiated Chemical Vapor Deposition

et al. 2020

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In this study, liquid droplets of 1-allyl-3-methylimidazolium dicyanamide have been processed by initiated chemical vapor deposition (iCVD) with a cross-linked polymer film consisting of (hydroxyethyl)methacrylate and ethylene glycol dimethacrylate to develop free-standing, ion-conductive membranes. We found that the obtained films are solids and have a conductivity of up to 18 ± 6 mS/cm, associated with the negatively charged counterion, indicating no loss of conductivity, compared to the ionic liquid in the liquid state. The membranes were conductive within a large process window and in air, thanks to the fact that the iCVD process does not affect the mobility of the anion in the ionic liquid. Furthermore, we demonstrate that varying the deposition conditions can influence the homogeneity and conductivity of the resulting membranes. The promising results of this study represent an important stepping stone on the way to novel ion-conductive membranes.

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Simple method for the quantitative analysis of thin copolymer films on substrates by infrared spectroscopy using direct calibration

Abstract: Automated baseline estimation followed by least squares fitting of copolymer spectrum allows quantification in terms of comonomer volume fraction.

Cited by 10 publications

References 47 publications

Growth Regimes of Poly(perfluorodecyl acrylate) Thin Films by Initiated Chemical Vapor Deposition

Growth Regimes of Poly(perfluorodecyl acrylate) Thin Films by Initiated Chemical Vapor Deposition

Initiated Chemical Vapor Deposition of Crosslinked Organic Coatings for Controlling Gentamicin Delivery

Deposition of Ion-Conductive Membranes from Ionic Liquids via Initiated Chemical Vapor Deposition

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