Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10377664 | Journal of Colloid and Interface Science | 2005 | 4 Pages |
Abstract
The water-insoluble poly-β-cyclodextrin (poly-CD)/Nafion composite film was easily prepared by casting a mixed solution of poly-CD and Nafion onto substrate plates. FT-IR measurements showed that the 50/50 wt% poly-CD/Nafion composite film remained stable on the glass and quartz substrates after immersion in water for more than 3 h, while a pure poly-CD film was almost completely dissolved by immersion within 1 h. The film stability was also evaluated from the amount of p-nitrophenol (p-NP) inclusion in the film, which was determined from the decrease in UV-vis absorbance of the p-NP solution into which the film was immersed. The composition dependence of the inclusion amount showed that the film was stable up to 50 wt% CD, but became less stable with further increase in the CD concentration in the film. From the isotherms for the inclusion of p-NP and 1-naphthoate (1-Naph) into the film, the inclusion (stability) constants were determined to be 3.7Ã103 Mâ1 and 1.9Ã102 Mâ1, respectively. These results show that the selective inclusion of CD is retained after preparation of the composite film.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Kou Nakata, Minoru Sakamoto, Satoshi Taguchi, Noboru Yoshida, Katsuaki Shimazu,