Stearyl poly(ethylene oxide) grafted surfaces for preferential adsorption of albumin

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Ji, J (Author) Other; Feng, LX (Author) Other; Mário Adolfo Barbosa (Author) FEUP

Journal

Title: Biomaterials

Vol. 22 No. 23

Pages: 3015-3023

ISSN: 0142-9612

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 30 Citations

Scopus - 30 Citations

Other information

Authenticus ID: P-000-STB

DOI: 10.1016/s0142-9612(01)00048-5

Abstract (EN): An ideal surface for many biomedical applications would resist non-specific protein adsorption while at the same time triggering a specific biological pathway. Based on the approach of selectively binding albumin to free fatty acids, stearyl groups were immobilized onto poly(styrene) backbone via poly(ethylene oxide) side chains. X-ray photoelectron spectroscopy (XPS) analysis indicates substantial surface enrichment of the stearyl poly(ethylene oxide) (SPEO). In an aqueous environment, the surface rearrangement is limited, as proved by dynamic contact angle tests. The comb-like copolymer presents a special hydrophobic surface with high SPEO surface density, which may be due to the 'tail like' SPEO architecture at the copolymer/water interface. Protein adsorption tests confirm that the comb-like surfaces adsorb high levels of albumin and resist fibrinogen adsorption very significantly. The surfaces prepared in this research attract and reversibly bind albumin due to the synergistic action of the PEO chains and the stearyl end groups.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9