Single-particle light scattering study of polyethyleneglycol-grafted poly(ureaurethane) microcapsule in ethanol.
Microcapsules having polyethyleneglycol-grafted poly(ureaurethane) (PUU) membrane and di-2ethylhexyl phthalate core have been prepared, and the structure when they were suspended in dispersing ethanol have been studied by means of single-particle light scattering method. The PUU membrane was synthesized from monomers with aromatic functional groups (microcapsule MC110) and hexamethylene functional groups (microcapsule MC160). Because the outer and inner solvent passed through the membrane easily, the outside and inside of the membrane were the same at the equilibrium state. The thickness of the wall membrane was significantly smaller than that calculated from the overall weight ratio of the wall-forming material and the core solvents. It was attributed to low affinity of PUU membranes and ethanol.
Terao
Ken
K
Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, 376-8515, Japan. terao@bce.gunma-u.ac.jp
Ohsawa
Akane
A
Mori
Yasutaka
Y
Narita
Takayuki
T
Ichikawa
Kimio
K
Dobashi
Toshiaki
T
D002214:Capsules / Q000737:chemistry*; D003102:Colloids; D008027:Light; D008968:Molecular Conformation; D011092:Polyethylene Glycols / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D012542:Scattering, Radiation
D002214:Capsules; D003102:Colloids; D011140:Polyurethanes; D011092:Polyethylene Glycols