Fabrication of Three-Dimensional Polymer-Brush Gradients within Elastomeric Supports by Cu-0-Mediated Surface-Initiated ATRP

Author(s)

Albers, Rebecca Faggion ^{[1, 2, 3, 4, 5]} ; Magrini, Tommaso ^[3] ; Romio, Matteo ^{[4, 5]} ; Leite, Edson R. ^{[1, 2]} ; Libanori, Rafael ^[3] ; Studart, Andre R. ^[3] ; Benetti, Edmondo M. ^{[4, 5, 6]}

Affiliation

^[1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas - Brazil

^[3] Swiss Fed Inst Technol, Complex Mat, Dept Mat, CH-8093 Zurich - Switzerland

^[4] Swiss Fed Inst Technol, Lab Surface Sci & Technol, Dept Mat, CH-8093 Zurich - Switzerland

^[5] Swiss Fed Labs Mat Sci & Technol Empa, St Gallen - Switzerland

^[6] Univ Padua, Dept Chem Sci, I-35131 Padua - Italy

• Document type: Journal article
• Source: ACS MACRO LETTERS; v. 10, n. 9, p. 1099-1106, SEP 21 2021.
• Web of Science Citations: 0

Abstract

Cu-0-mediated surface-initiated ATRP (Cu-0 SI-ATRP) emerges as a versatile, oxygen-tolerant process to functionalize three-dimensional (3D), microporous supports forming single and multiple polymer-brush gradients with a fully tunable composition. When polymerization mixtures are dispensed on a Cu-0-coated plate, this acts as oxygen scavenger and source of active catalyst. In the presence of an ATRP initiator-bearing microporous elastomer placed in contact with the metallic plate, the reaction solution infiltrates by capillarity through the support, simultaneously triggering the controlled growth of polymer brushes. The polymer grafting process proceeds with kinetics that are determined by the progressive infiltration of the reaction solution within the microporous support and by the continuous diffusion of catalyst regenerated at the Cu-0 surface. The combination of these effects enables the accessible generation of 3D polymer-brush gradients extending across the microporous scaffolds used as supports, finally providing materials with a continuous variation of interfacial composition and properties. (AU)

• FAPESP's process: 16/14493-7 - Functionalization of lamellar chalcogenides (2D) and its application in nanocomposites of olefin polymer
• Grantee: Rebecca Faggion Albers
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 17/22304-2 - Fabrication of highly-loaded composites through magnetic assembly of functionalized MoS2 flakes
• Grantee: Rebecca Faggion Albers
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate