Effect of the form of the quaternary ammonium ion on the ion-pair phase separation phenomenon with perfluorooctanoic acid
Yokohashi, G; Igarashi, S
| HERO ID | 3860752 |
|---|---|
| In Press | No |
| Year | 1997 |
| Title | Effect of the form of the quaternary ammonium ion on the ion-pair phase separation phenomenon with perfluorooctanoic acid |
| Authors | Yokohashi, G; Igarashi, S |
| Journal | Journal of Colloid and Interface Science |
| Volume | 185 |
| Issue | 1 |
| Page Numbers | 278-280 |
| Abstract | The effect of the form of 10 types of quaternary ammonium ions (Q(+))for the phase separation phenomenon, which accompanies a charge neutralization with perfluorooctanoate ion (PFOA(-)) and Q(+), was studied, The separated phase using the spherical form of Q(+) (i.e., [4 . 4 . 4 . 4], [3 . 3 . 5 . 5], [3 . 3 . 3 . 7], and [2 . 2 . 6 . 6], where the numbers in square brackets represent the carbon numbers of four kinds of straight alkyl chains which were directly bonded to the nitrogen atom) was in the liquid state, On the other hand, the separated phase using the rod form ([2 . 2 . 2 . 10] and [1 . 1 . 1 . 13]) was in the solid state. The volume, specific gravity, and water content of the liquid-separated phase using [3 . 3 . 5 . 5] were 116 mu l, 1.27, and 6.98%, respectively, under the following experimental conditions: [Q(+)](T) = 2.30 x 10(-2) mol dm(-3), [PFOA(-)](T) = 5.75 x 10(-3) mol dm(-3), and 25 degrees C, This liquid phase was stable to physical changes such as Qi total concentration and temperature, compared with three other types of Q(+) ([4 . 4 . 4 . 4], [3 . 3 . 3 . 7], and [2 . 2 . 6 . 6]), which formed similar liquid-separated phases. (C) 1997 Academic Press |
| Doi | 10.1006/jcis.1996.4543 |
| Pmid | 9056352 |
| Wosid | WOS:A1997WD07600033 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | form effect of quaternary ammonium ion; perfluorooctanoic acid; ion-pair association; phase separation phenomenon |