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- Title
Neutron Reflectometry & Simultaneous Measurements of Rheology and Small Angle Neutron Scattering Studies for Polyether Modified Silicone Vesicle Systems.
- Authors
Makoto Uyama; Atsushi Takahara; Yuji Higaki; Yamada, Norifumi L.; Hiroki Iwase
- Abstract
Polyethyleneglycol 12 mol / polydimethylsiloxane co-polymer (PEG-12 dimethicone) is a type of polyether modified silicone (PEMS), which can form a lamellar liquid crystalline phase, and is widely used in cosmetics. The structural changes of PEG-12 dimethicone caused by water contents as well as shear flow were evaluated using simultaneous measurements of rheology and small angle neutron scattering (Rheo- SANS) and neutron reflectometry (NR). At high PEG-12 dimethicone concentrations (≥ 36 wt%), a reorientation of plate-like lamellar structures were observed and the neutral orientation was the most favorable. However, lamella-to-vesicle transitions were hardly observed. PEG-12 dimethicone turned out to form a bi-layer on a hydrophilized Si-wafer in a similar manner to that in bulk though the structure had a certain level of roughness.
- Subjects
NEUTRON reflectometry; SMALL-angle scattering; SMALL-angle neutron scattering; LIQUID crystal states; SHEAR flow; RHEOLOGY
- Publication
Journal of Oleo Science, 2022, Vol 71, Issue 11, p1625
- ISSN
1345-8957
- Publication type
Article
- DOI
10.5650/jos.ess22190