In situ and real-time small-angle neutron scattering studies of living anionic polymerization process and polymerization-induced self-assembly of block copolymers

2006 ◽  
Vol 385-386 ◽  
pp. 742-744 ◽  
Author(s):  
H. Tanaka ◽  
K. Yamauchi ◽  
H. Hasegawa ◽  
N. Miyamoto ◽  
S. Koizumi ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Neutron Scattering ◽  
Real Time ◽  
Small Angle ◽  
Anionic Polymerization ◽  
Self Assembly ◽  
Small Angle Neutron Scattering ◽  
Polymerization Process ◽  
Living Anionic Polymerization

scholarly journals Vortex fluidic mediated encapsulation of functional fish oil featuring in situ probed small angle neutron scattering

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Shan He ◽  
Nikita Joseph ◽  
Marzieh Mirzamani ◽  
Scott J. Pye ◽  
Ahmed Hussein Mohammed Al-anataki ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fish Oil ◽  
Neutron Scattering ◽  
Real Time ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Bioactive Molecules ◽  
Omega 3 Fatty Acids ◽  
Omega 3

Abstract Major challenges for optimizing the benefits of fish oil on human health are improved bioavailability while overcoming the strong odor and avoiding significant oxidation of the omega-3 polyunsaturated fatty acids (PUFAs). The scalable continuous flow thin film vortex fluidic device (VFD) improves the Tween 20 encapsulation of fish oil relative to conventional homogenization processing, with the fish oil particles significantly smaller and the content of the valuable omega-3 fatty acids higher. In addition, after 14 days storage the remaining omega-3 fatty acids content was higher, from ca 31.0% for raw fish oil to ca 62.0% of freeze-dried encapsulated fish oil. The VFD mediated encapsulated fish oil was used to enrich the omega-3 fatty acid content of apple juice, as a model water-based food product, without changing its sensory values. The versatility of the VFD was further demonstrated in forming homogenous suspensions of fish oil containing water-insoluble bioactive molecules, curcumin and quercetin. We have also captured, for the first time, real-time structural changes in nanoencapsulation by installing a VFD with in in situ small angle neutron scattering. Real-time measurements afford valuable insights about self-assembly in solution.

scholarly journals Morphology of crystalline–amorphous olefin block copolymers in solution characterized by small-angle neutron scattering and microscopy

2015 ◽  
Vol 48 (6) ◽  
pp. 1860-1869 ◽  
Author(s):  
Aurel Radulescu ◽  
Günter Goerigk ◽  
Lewis Fetters ◽  
Dieter Richter
Keyword(s):  
Block Copolymers ◽  
Neutron Scattering ◽  
Small Angle ◽  
Self Assembly ◽  
Small Angle Neutron Scattering ◽  
Chain Structure ◽  
Hierarchical Organization ◽  
Single Chain ◽  
Scanning Calorimetry ◽  
Assembly Behavior

The single-chain properties and self-assembly behavior in dilute solution of olefin block copolymers obtained by chain-shuttling technology and consisting of alternating crystallizable and amorphous ethylene/1-octene blocks were investigated by pinhole and focusing small-angle neutron scattering techniques, optical microscopy in bright-field and crossed-polarizer modes, and differential scanning calorimetry. The complex hydrocarbon soluble (precipitant free) macro-aggregates formed with decreasing temperature are characterized by spherulitic textures. The spherulites yield, on one hand, a morphology that depends on the chain structure properties and, on the other hand, multiple structural levels with a hierarchical organization that ranges from 10 Å up to tens of micrometres. This morphology displays peculiarities dictated by the polydisperse character of these materials.

Probing the dynamic self-assembly behaviour of photoswitchable wormlike micelles in real-time

Soft Matter ◽  
2019 ◽  
Vol 15 (6) ◽  
pp. 1253-1259 ◽  
Author(s):  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Rachel C. Evans
Keyword(s):  
Neutron Scattering ◽  
Real Time ◽  
Absorption Spectroscopy ◽  
Small Angle ◽  
Self Assembly ◽  
Small Angle Neutron Scattering ◽  
Wormlike Micelles

UV-Vis absorption spectroscopy is combined with small-angle neutron scattering to monitor the dynamic self-assembly of an azobenzene photosurfactant from worm-like micelles to fractals during photoisomerization.

scholarly journals Amphiphilic Bottlebrush Block Copolymers: Analysis of Aqueous Self-Assembly by Small-Angle Neutron Scattering and Surface Tension Measurements

2018 ◽  
Vol 52 (2) ◽  
pp. 465-476 ◽  
Author(s):  
Mohammed Alaboalirat ◽  
Luqing Qi ◽  
Kyle J. Arrington ◽  
Shuo Qian ◽  
Jong K. Keum ◽  
...  
Keyword(s):  
Surface Tension ◽  
Block Copolymers ◽  
Neutron Scattering ◽  
Small Angle ◽  
Self Assembly ◽  
Small Angle Neutron Scattering

Small-angle neutron scattering by two-component particles: Application to block copolymers

1981 ◽  
Vol 19 (7) ◽  
pp. 1019-1031 ◽  
Author(s):  
L. Ionescu ◽  
C. Picot ◽  
M. Duval ◽  
R. Duplessix ◽  
H. Benoit ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Two Component

scholarly journals SANS study of mixed cholesteric cellulose nanocrystal – gold nanorod suspensions

2020 ◽  
Vol 56 (85) ◽  
pp. 13001-13004
Author(s):  
Jonas Van Rie ◽  
Guillermo González-Rubio ◽  
Sugam Kumar ◽  
Christina Schütz ◽  
Joachim Kohlbrecher ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Gold Nanorods ◽  
Small Angle ◽  
Cellulose Nanocrystals ◽  
Self Assembly ◽  
Small Angle Neutron Scattering ◽  
Gold Nanorod ◽  
Cellulose Nanocrystal

Self-assembly of cellulose nanocrystals (CNCs) doped with anisotropic gold nanorods (AuNRs) was studied by small-angle neutron scattering.

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