Stretching a polymer brush by making in situ cyclodextrin inclusion complexes.
The interaction between poly(ethylene oxide) (PEO) chains grafted onto polystyrene latex particles and alpha-, beta-, and gamma-cyclodextrins (CD) was studied by small-angle neutron scattering. The particles were contrast-matched to the solvent in order that only the scattering from the polymer layers was detected. The signal from the layers was fitted to a double-exponential volume fraction profile. The effects of adding cyclodextrin on the polymer profile are shown as a function of cyclodextrin concentration. The polymer layers are seen to extend on addition of CD, which is consistent with a complexation between the grafted PEO and the CD molecules. The effect is the strongest with alpha-CD.
Joseph
Julie
J
School of Chemistry, University of Bristol, Cantock's Close, Bristol, U.K.
Dreiss
Cécile A
CA
Cosgrove
Terence
T
D000327:Adsorption; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D003102:Colloids / Q000737:chemistry; D003505:Cyclodextrins / Q000737:chemistry*; D007840:Latex / Q000737:chemistry; D015233:Models, Statistical; D009502:Neutrons; D011092:Polyethylene Glycols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D012542:Scattering, Radiation; D013499:Surface Properties
D003102:Colloids; D003505:Cyclodextrins; D007840:Latex; D011108:Polymers; D011137:Polystyrenes; D011092:Polyethylene Glycols