[article]
| Titre : |
Syntheses and properties of new double-tail trisiloxane surfactants with both hydrolysis resistance and high spreading ability |
| Type de document : |
texte imprimé |
| Auteurs : |
Z. Peng, Auteur ; Y. Liufu, Auteur ; L. Zhang, Auteur ; J. Chen, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 148-153 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
'Double queue de trisiloxane' 'Capacité propagation' résistance à l'hydrolyse' |
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
New double-tail trisiloxane surfactants of the general formula R1NR2CH2CH(OH)CH2O(CH2CH2O)xCH3 (R1=Me3SiOSiMe(CH2)3 · OSiMe3; R2=Me3SiOSiMe((CH2)3OCH2CH(OH)CH2)OSiMe3; x= 8.4, 12.9, 17.5, 22) have been synthesized. The spreading ability (SA) values of the double-tail trisiloxane surfactants solutions (1.0 × 10–3 mol/L) with average ethoxy units of 8.4, 12.9 and 17.5 on ficus microcarpa leave surface are more than 9 within 3 minutes, and their SA values on the parafilm surface are over 15 within 10 minutes at a concentration of 5.0 × 10–3 mol/L. In alkaline environment (pH = 10.0) the hydrolysis resistant ability (HRA) of the double-tail trisiloxane surfactant containing average ethoxy units of 8.4 with the surface tension of aqueous solution (1.0 × 10–3 mol/L) of less than 23 mN/m over 170 days, is far better than the others’. It is suggested that a more flexible spacer between hydrophobic groups and hydrophilic groups in double-tail trisiloxane surfactants molecules, not only can improve their SA on low-energy solid surfaces, but also improve their HRA. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11124 |
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 148-153
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