Revealing surface functionalities via microwave for the para-fluoro-Thiol click reaction

A fast and simple bottom-up methodology is reported to allow, thanks to a spontaneous phenomenon, the grafting of various materials on polymer substrates. In 60 s, the inert surface of polystyrene material is converted into a functional platform onto which organic molecules and metal particles can b...

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Bibliographic Details
Published in:Polymer (Guilford) 2020-08, Vol.202, p.122675, Article 122675
Main Authors: Loudy, Coste Mawélé, Chasvised, Sirikorn, Paybou, Clara, Courrèges, Cécile, Allouche, Joachim, Martinez, Hervé, Bousquet, Antoine, Billon, Laurent
Format: Article
Language:English
Subjects:
Annealing
Block copolymers
Chemical reactions
Chemical Sciences
Diblock copolymer
Fluorine
Gold nanoparticles
Material chemistry
Metal particles
Microwave
Nanoparticles
Organic chemistry
para-fluoro-thiol click reaction
Polymers
Polystyrene
Polystyrene resins
Substitution reactions
Substrates
Surface energy
Surface properties
Surface segregation
Thiols
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Summary:A fast and simple bottom-up methodology is reported to allow, thanks to a spontaneous phenomenon, the grafting of various materials on polymer substrates. In 60 s, the inert surface of polystyrene material is converted into a functional platform onto which organic molecules and metal particles can be anchored. A polystyrene (PS) matrix is blended with a small amount of a diblock copolymer additive engineered to both segregate at the material surface and be able to involve chemical reaction. Indeed, poly(pentafluorostyrene) (PSF) contains surface active fluorine atoms and the nucleophuge para-fluorine atom that allows nucleophilic substitution with thiols. Films of blend of PS matrix and PS-b-PSF additive are submitted to a microwave annealing to accelerate the spontaneous surface segregation of fluorine low surface energy atoms. XPS was performed to find that the optimal annealing conditions was a treatment at 30 W during 60 s. With this procedure, a blend of 5 w% in additive can lead to a surface composed of 13 at% of fluorine atoms corresponding to 55 w% of diblock. The pentafluorostyrene units decorating the surface were used as anchors to immobilize gold nanoparticles via the para-fluoro-thiol click reaction. [Display omitted] •A block copolymer polystyrene-block-poly(pentaflurorostyrene) has been synthesized via NMP.•The surface segregation of the copolymer is promoted in 60 s via microwave annealing.•The para-fluoro-thiol click reaction was used to immobilize gold nanoparticles.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2020.122675