3D FT-IR imaging spectroscopy of phase-separation in a poly(3-hydroxybutyrate)/poly( l -lactic acid) blend

Unger, Miriam; Sedlmair, Julia; Siesler, Heinz W.; Hirschmugl, Carol J.

doi:10.1016/j.vibspec.2014.07.007

Cited by 13 publications

(7 citation statements)

References 20 publications

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“…3). To date, 3D FTIR spectro-tomography has been applied for the reconstruction of microscopically intact and untreated biological or material samples such as the tracheary element of Zinnia elegans, Populus wood ber, human hair, an embryonic body colony of stem cells, 57 polymer blends, 58 and single cells. 59 The size of the samples ranges from ca.…”

Section: Ftir Spectromicroscopy: Imaging and Tomography Of Microscopi...mentioning

confidence: 99%

Non-destructive molecular FTIR spectromicroscopy for real time assessment of redox metallodrugs

et al. 2022

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Section: Ftir Spectromicroscopy: Imaging and Tomography Of Microscopi...mentioning

confidence: 99%

Non-destructive molecular FTIR spectromicroscopy for real time assessment of redox metallodrugs

et al. 2022

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“…The lowermost stripe has water and glass superimposed, the middle stripe shows more water around the glass, and the topmost stripe shows that the water-rich region is mostly parallel and beside the strongest glass region. 3D FTIR tomographic imaging was also used to study polymer blends, such as a phaseseparated poly(3-hydroxybutyrate)(PHB)/poly(L-lactic acid) (PLA) (50:50 wt%) polymer blend film [ 85 ], Figure 13b. Contrary to conventional 2D imaging techniques, this analytical approach offers the possibility to combine spectral and spatial information by measuring several hundred thousand spectra of laterally resolved sample positions during 360° rotation of the sample in a relatively short time thereby providing "chemical images" of the three-dimensional blend morphology.…”

Section: D and 3d Imagingmentioning

confidence: 99%

Opportunities and challenges for polymer science using synchrotron-based infrared spectroscopy

Ellis

Martin

2016

European Polymer Journal

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Many breakthrough advances that are often at the cutting edge of technological development take place at synchrotron facilities. In the case of IR spectroscopy, the last decade has seen important developments in infrared instrumentation incorporated to and developed at synchrotron facilities to take advantages of the characteristics of the bright synchrotron source. In this feature article we describe the origin and nature of synchrotron infrared microspectroscopy, highlighting some of the key developments that will make a future impact in the study of macromolecular materials, and illustrating several applications in the area of polymer science.

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“…The δ of PLA is 19.5–20.5 MPa 1/2 , while that of PHB is 18.5–20.1 MPa 1/2 and good miscibility is expected due to the similar δ values of these two polymers . However, in addition to the solubility parameters, the miscibility of PLA and PHB also depends on the molecular weight − and concentration of PLA . The processing temperature also plays an important role in the PLA–PHB performance.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer Blends of Poly(lactic acid) and Poly(hydroxybutyrate) and Their Functionalization with Glycerol Triacetate and Chitin Nanocrystals for Food Packaging Applications

Patel

Hansson

Pitkänen

et al. 2022

ACS Appl. Polym. Mater.

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Polylactic acid (PLA) is a biopolymer that has potential for use in food packaging applications; however, its low crystallinity and poor gas barrier properties limit its use. This study aimed to increase the understanding of the structure property relation of biopolymer blends and their nanocomposites. The crystallinity of the final materials and their effect on barrier properties was studied. Two strategies were performed: first, different concentrations of poly(hydroxybutyrate) (PHB; 10, 25, and 50 wt %) were compounded with PLA to facilitate the PHB spherulite development, and then, for further increase of the overall crystallinity, glycerol triacetate (GTA) functionalized chitin nanocrystals (ChNCs) were added. The PLA:PHB blend with 25 wt % PHB showed the formation of many very small PHB spherulites with the highest PHB crystallinity among the examined compositions and was selected as the matrix for the ChNC nanocomposites. Then, ChNCs with different concentrations (0.5, 1, and 2 wt %) were added to the 75:25 PLA:PHB blend using the liquid-assisted extrusion process in the presence of GTA. The addition of the ChNCs resulted in an improvement in the crystallization rate and degree of PHB crystallinity as well as mechanical properties. The nanocomposite with the highest crystallinity resulted in greatly decreased oxygen (O ) and carbon dioxide (CO 2 ) permeability and increased the overall mechanical properties compared to the blend with GTA. This study shows that the addition ChNCs in PLA:PHB can be a possible way to reach suitable gas barrier properties for food packaging films.

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3D FT-IR imaging spectroscopy of phase-separation in a poly(3-hydroxybutyrate)/poly( l -lactic acid) blend

Cited by 13 publications

References 20 publications

Non-destructive molecular FTIR spectromicroscopy for real time assessment of redox metallodrugs

Non-destructive molecular FTIR spectromicroscopy for real time assessment of redox metallodrugs

Opportunities and challenges for polymer science using synchrotron-based infrared spectroscopy

Biopolymer Blends of Poly(lactic acid) and Poly(hydroxybutyrate) and Their Functionalization with Glycerol Triacetate and Chitin Nanocrystals for Food Packaging Applications

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