Spin-echo small-angle neutron scattering for multiscale structure analysis of food materials

Bouwman, Wim G.

doi:10.1016/j.foostr.2021.100235

Cited by 10 publications

(4 citation statements)

References 44 publications

(56 reference statements)

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“…Several studies have explored polymer systems such as colloids [ 57 ] and fibrous calcium caseinate gels [ 58 ]. However, it is only recently that new instrumentation at large facilities [ 59 ], and straightforward analysis techniques, have emerged for structural determination [ 60 ]. There also exist possibilities to use this technique to look at the kinetics [ 61 ], and a similar approach could be undertaken to look at the kinetics of film formation.…”

Section: Advanced Structural Characterization Of Pil-based Membranesmentioning

confidence: 99%

Recent Advances in Poly(Ionic Liquid)-Based Membranes for CO2 Separation

Bernardo

Gaspar

2023

Polymers

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Poly(ionic liquid)-based membranes have been the subject of intensive research in the last 15 years due to their potential for the separation of CO2 from other gases. In this short review, different types of PIL-based membranes for CO2 separation are described (neat PIL membranes; PIL-IL composite membranes; PIL-polymer blend membranes; PIL-based block copolymer membranes, and PIL-based mixed matrix membranes), and their state-of-the-art separation results for different gas pairs (CO2/N2, CO2/H2, and CO2/CH4) are presented and discussed. This review article is focused on the most relevant research works performed over the last 5 years, that is, since the year 2017 onwards, in the field of poly(ionic liquid)-based membranes for CO2 separation. The micro- and nano-morphological characterization of the membranes is highlighted as a research topic that requires deeper study and understanding. Nowadays there is an array of advanced structural characterization techniques, such as neutron scattering techniques with contrast variation (using selective deuteration), that can be used to probe the micro- and nanostructure of membranes, in length scales ranging from ~ 1 nm to ~ 15 mm. Although some of these techniques have been used to study the morphology of PIL-based membranes for electrochemical applications, their use in the study of PIL-based membranes for CO2 separation is still unknown.

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Section: Advanced Structural Characterization Of Pil-based Membranesmentioning

confidence: 99%

Recent Advances in Poly(Ionic Liquid)-Based Membranes for CO2 Separation

Bernardo

Gaspar

2023

Polymers

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“…perpendicular to the optical axis z, which are generated by permanent magnets. SESANS finds a broad range of applications such as in colloid science Li et al, 2011;Washington et al, 2014;van Gruijthuijsen et al, 2014van Gruijthuijsen et al, , 2018 or food science (Bouwman, 2021). Most SESANS instruments access spin echo lengths spanning three orders of magnitude from 10 nm up to 20 mm.…”

Section: Linear Sesansmentioning

confidence: 99%

Radial spin echo small-angle neutron scattering method: concept and performance

2022

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A novel spin echo small-angle neutron scattering (SESANS) concept based on a rotationally symmetric magnetic field geometry is introduced. The proposed method is similar to the conventional linear SESANS technique but uses longitudinal precession fields and field gradients in a radial direction, as typically found in neutron spin echo (NSE) spectrometers. Radial SESANS could thus be implemented as an add-on to NSE setups. The neutron trajectory through the instrument is encoded with the help of radial gradients generated by radial shifters, which are coils placed in the beam area similar to Fresnel coils. The present work introduces the setup of the instrument and explores its performance and the relationship between the encoded momentum transfer and the precession angle. The results indicate that radial SESANS is only sensitive to scattering along the radial direction and thus measures the projected correlation function along this direction as a function of the spin echo length, defined similarly to linear SESANS. For an evaluation of the performance of the setup, the case of scattering from solid spheres is considered and the results calculated for the radial and linear SESANS cases are compared. Also discussed is the implementation of the radial magnetic field geometry in spin echo modulated small-angle neutron scattering.

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“…Spin–echo SANS (SESANS) is an exciting neutron scattering development that combines the benefits of a neutron scattering technique with the ability to probe length scales from ∼100’s nm to 20 μm − and, if necessary, also analyze highly concentrated systems as multiple scattering is accounted for . The SESANS technique “encodes” angular information arising from the scattering process in the precession of neutrons in a polarized beam (much like 1 H NMR as neutrons are also spin-1/2 particles), thereby circumventing the strict geometrical limitations of conventional SANS/SAXS or ultrasmall-angle scattering (USANS/USAXS).…”

Section: Introductionmentioning

confidence: 99%

“…The SESANS technique “encodes” angular information arising from the scattering process in the precession of neutrons in a polarized beam (much like 1 H NMR as neutrons are also spin-1/2 particles), thereby circumventing the strict geometrical limitations of conventional SANS/SAXS or ultrasmall-angle scattering (USANS/USAXS). SESANS has been previously used to study a number of soft matter systems, aggregates in solution, and colloidal particles. , More recently Bernardo et al used the technique to study the degree of dissolution of a range of organic photovoltaic relevant fullerenes (PC 61 BM and PC 71 BM) to ascertain the maximum solubility in these highly opaque solutions . They were able to observe the presence of colloidal aggregates in solution arising from incomplete dissolution of the fullerene species as they went beyond the solubility limit.…”

Section: Introductionmentioning

confidence: 99%

Exploring Nanoscale Structure in Perovskite Precursor Solutions Using Neutron and Light Scattering

et al. 2022

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Tailoring the solution chemistry of metal halide perovskites requires a detailed understanding of precursor aggregation and coordination. In this work, we use various scattering techniques, including dynamic light scattering (DLS), small angle neutron scattering (SANS), and spin–echo SANS (SESANS) to probe the nanostructures from 1 nm to 10 μm within two different lead-halide perovskite solution inks (MAPbI 3 and a triple-cation mixed-halide perovskite). We find that DLS can misrepresent the size distribution of the colloidal dispersion and use SANS/SESANS to confirm that these perovskite solutions are mostly comprised of 1–2 nm-sized particles. We further conclude that if there are larger colloids present, their concentration must be <0.005% of the total dispersion volume. With SANS, we apply a simple fitting model for two component microemulsions (Teubner–Strey), demonstrating this as a potential method to investigate the structure, chemical composition, and colloidal stability of perovskite solutions, and we here show that MAPbI 3 solutions age more drastically than triple cation solutions.

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Spin-echo small-angle neutron scattering for multiscale structure analysis of food materials

Cited by 10 publications

References 44 publications

Recent Advances in Poly(Ionic Liquid)-Based Membranes for CO2 Separation

Recent Advances in Poly(Ionic Liquid)-Based Membranes for CO2 Separation

Radial spin echo small-angle neutron scattering method: concept and performance

Exploring Nanoscale Structure in Perovskite Precursor Solutions Using Neutron and Light Scattering

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