| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo - Brazil
[2] Univ Fed Rio de Janeiro, Inst Quim, BR-27930560 Macae - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Materials Science & Engineering C-Materials for Biological Applications; v. 32, n. 2, p. 348-355, MAR 1 2012. |
| Web of Science Citations: | 5 |
| Abstract | |
Films of cellulose acetate butyrate (CAB) and carboxymethylcellulose acetate butyrate (CMCAB) were deposited from ethyl acetate solutions onto bare silicon wafers (Si/SiO2) or amino-terminated surfaces (APS) by means of equilibrium adsorption. All surfaces were characterized by means of ellipsometry, atomic force microscopy (AFM) and contact angle measurements. The presence of amino groups on the support surface favored the adsorption of CAB and CMCAB, inducing the orientation almost polar groups to the surface and the exposition of alkyl group to the air. Such molecular orientation caused increase of the dispersive component of surface energy (gamma(d)(s)) and decrease of the polar component of surface energy (gamma(p)(s)) of cellulose esters in comparison to those values determined for films deposited onto bare Si/SiO2 wafers. Adsorption behavior of jacalin or concanavalin A onto CAB and CMCAB films was also investigated. The adsorbed amounts of lectins were more pronounced on cellulose esters with high (gamma(p)(s)) and total surface energy (gamma(t)(s)) values. (C) 2011 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 10/51219-4 - Interactions between macromolecules and surfaces |
| Grantee: | Denise Freitas Siqueira Petri |
| Support Opportunities: | Regular Research Grants |