title: Tea stains-inspired initiator primer for surface grafting of antifouling and antimicrobial polymer brush coatings.
abstract: Inspired by tea stains, plant polyphenolic tannic acid (TA) was beneficially employed as the primer anchor for functional polymer brushes. The brominated TA (TABr) initiator primer was synthesized by partial modification of TA with alkyl bromide functionalities. TABr with trihydroxyphenyl moieties can readily anchor on a wide range of substrates, including metal, metal oxide, polymer, glass, and silicon. Concomitantly, the alkyl bromide terminals serve as initiation sites for atom transfer radical polymerization (ATRP). Cationic [2-(methacryloyloxy)ethyl]trimethylammonium chloride (META) and zwitterionic 2-methacryloyloxyethyl phosphorylcholine (MPC) and N-(3-sulfopropyl)-N-(methacryloxyethyl)-N,N-dimethylammonium betaine (SBMA) were graft-polymerized from the TABr-anchored stainless steel (SS) surface. The cationic polymer brushes on the modified surfaces are bactericidal, while the zwitterionic coatings exhibit resistance against bacterial adhesion. In addition, microalgal attachment (microfouling) and barnacle cyprid settlement (macrofouling) on the functional polymer-grafted surfaces were significantly reduced, in comparison to the pristine SS surface. Thus, the bifunctional TABr initiator primer provides a unique surface anchor for the preparation of functional polymer brushes for inhibiting both microfouling and macrofouling.
authors: Department of Chemical and Biomolecular Engineering, National University of Singapore , Kent Ridge, Singapore 119260.
authors: Dicky
authors: D
authors: Pranantyo
authors: Li Qun
authors: LQ
authors: Xu
authors: Koon-Gee
authors: KG
authors: Neoh
authors: En-Tang
authors: ET
authors: Kang
authors: Ying Xian
authors: YX
authors: Ng
authors: Serena Lay-Ming
authors: SL
authors: Teo
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001422:Bacterial Adhesion; D057219:Biofouling; D017377:Diatoms / Q000502:physiology; D004951:Esterification; D058105:Polymerization; D013193:Stainless Steel / Q000737:chemistry; D013211:Staphylococcus aureus / Q000187:drug effects / Q000502:physiology; D013499:Surface Properties; D013634:Tannins / Q000737:chemistry; D013662:Tea / Q000737:chemistry*; D001468:Thoracica / Q000502:physiology
chemical_list: D000900:Anti-Bacterial Agents; D013634:Tannins; D013662:Tea; D013193:Stainless Steel