| Full text | |
| Author(s): |
dos Santos Junior, T.
[1]
;
Pereira, I, C.
;
Goncalves, R.
[2]
;
Fernandes, C. H. M.
[3]
;
Salvini, V. R.
[4]
;
Pandolfelli, V. C.
[5]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Mat Engn Dept, FIRE Associate Lab, Grad Program Mat Sci & Engn PPGCEM, Mat Microstruc, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Mat Engn Dept, Smart Mat Res Team SMaRT, Grad Program Mat Sci & Engn PPGCEM, Rodovia Washington Luis, Km 235, BR-13566905 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Chem Dept, Lab Res Eletrochem LaPE, Rodovia Washington Luis, Km 235, BR-13566905 Sao Carlos, SP - Brazil
[4] Coll Technol FATEC Sertaozinho, Jordao Borghetti St 480, BR-14160050 Sertaozinho, SP - Brazil
[5] Pereira, C., I, Univ Fed Sao Carlos, Mat Engn Dept, FIRE Associate Lab, Grad Program Mat Sci & Engn PPGCEM, Mat Microstruc, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Journal of the European Ceramic Society; v. 40, n. 12, p. 4243-4252, SEP 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
The interaction of amino acids (glycine, L-valine, L-isoleucine and L-leucine) with alumina surface was studied to induce partial hydrophobization and production of ultrastable particle-stabilised foams. The evaluation of these amino acids was carried out by mechano-quantum simulations followed by experimental tests (foamability, zeta potential, contact angle and foam lifetime measurements). The experimental results agreed with the trends pointed out by the simulations. The selected amino acids interact with alumina particles in aqueous media and in a broader pH range, leading to hydrophobization of surfaces, which was more intense for amino acids with higher molecular mass (isoleucine and leucine). As a consequence, ultrastable foams with a longer lifetime ( > 100 h) were produced and the foam microstructure was preserved from ageing phenomena. Moreover, the attained foams were stable at different pH, opening up new possibilities to develop macroporous multiphasic ceramics, which can result in novel materials for thermal insulation at high temperatures. (AU) | |
| FAPESP's process: | 18/09761-8 - Study and development of ionic polymer/metal composites for application in actuators and sensors aiming low cost and high performance |
| Grantee: | Roger Gonçalves |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |