Surface-functionalised polymeric object and method of its production

US11618980B2 · kind B2 · utility

Assignee

• Helmholtz-Zentrum hereon GmbH · DE

Inventors

• Andreas Lendlein · Berlin, DE
• Axel Thomas Neffe · Berlin, DE
• Paul Jakob Hommes-Schattmann · Berlin, DE
• Quanchao Zhang · Qiaonanxiang, CN

Key dates

• Filing date: Sep 26, 2018
• Grant date: Apr 4, 2023
• Expiry date: Dec 28, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2467/04
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention provides a surface-functionalised polymeric object (10), comprising: a bulk material (11) comprising a copolymer containing constitution units derived from a first comonomer and constitution units derived from a second comonomer, the first comonomer being selected from L-lactide and D-lactide and forming sequences of oligo(L-lactide) or oligo(D-lactide) in the copolymer the copolymer having a substantially random, partially blocky structure with a dyad ratio of (lactide-lactide)-dyads to (lactide-second comonomer)-dyads of at least 2.0:1; and a surface layer (12) disposed on a surface of the bulk material (11), the surface layer (12) comprising a functionalising species and at least one chain of poly(D-lactide) or of poly(L-lactide) covalently bound to the functionalising species, and at least one chain being different from the oligo(L-lactide) sequences or oligo(D-lactide) sequences contained in the copolymer; wherein the surface layer (12) is attached to the bulk material (11) via stereocomplexes formed between the poly(D-lactide) chain(s) of the functionalising species and the oligo(L-lactide) sequences contained in the copolymer or via stereocomplexes formed betwe…