Synthesis of bottlebrush copolymers based on poly(dimethylsiloxane) for surface active additives

Abstract

mediated process. In this work, we design functional bottlebrush polymer additives with mixed side-chain chemistries that can deliver unique surface properties. Bottlebrush polymers with poly(dimethylsiloxane) (PDMS) side-chains and bottlebrush copolymers with PDMS and poly(lactic acid) (PLA) side-chains are synthesized using ring opening metathesis polymerization. Contact angle goniometry, X-ray photoelectron spectroscopy (XPS), and microscopy demonstrate a spontaneous accumulation of these additives at the film surface without lateral phase segregation. Bottlebrush polymers were found to enrich the film surface more strongly than linear block copolymers of PDMS-b-PLA, and the surface contact angle was tunable by varying the composition and quantity of added bottlebrush copolymer. Significantly, bottlebrush additives segregate rapidly, during film casting. This work demonstrates that lowsurface energy bottlebrush copolymer additives can be used to introduce new surface properties in polymer films.

A robust duplex Cu/PDMS-coated mesh with superhydrophobic surface for applications in cleaning of spilled oil

“…The analyses indicated that the mesh surface was covered with a Cu/ PDMS coating. 31 To prove the superhydrophobicity of mesh/Cu/PDMS-coated, we observed the wettability by water of the surface of pristine mesh, mesh/Cu-coated, mesh/PDMS-coated, and mesh/Cu/ Fig. 4.…”

Synthesis and Applications of Compartmentalised Molecular Polymer Brushes

“…[65] Arecent example by Matyjaszewski and co-workers used the in situ formation of Janus-type molecular copolymer brushes to stabilise waterin-oil emulsions ( Figure 8E). [67] These exciting applications of Janus particles in combination with the precise control over the molecular architecture and composition further motivate the use of molecular brushes at interfaces.P ickering emulsions, [68] polymer processing [65] and surface coatings [69] may benefit from such tuneable synthetic additives. [55] Yang and co-workers have recently reported the synthesis of asymmetric Janus molecular brush nanorods that adopt avertical orientation at the emulsion interface.…”

“…[55] Yang and co-workers have recently reported the synthesis of asymmetric Janus molecular brush nanorods that adopt avertical orientation at the emulsion interface. [67] These exciting applications of Janus particles in combination with the precise control over the molecular architecture and composition further motivate the use of molecular brushes at interfaces.P ickering emulsions, [68] polymer processing [65] and surface coatings [69] may benefit from such tuneable synthetic additives.…”

Synthese und Anwendung von kompartimentierten molekularen Polymerbürsten

“…Diese interessante Verwendung von Januspartikeln in Kombination mit präziser Kontrolle über die molekulare Architektur und Zusammensetzung verdeutlicht wiederum das Anwendungspotenzial von Molekularbürsten an Grenzflächen. Andere Beispiele für die Verwendung von Additiven auf Basis von Molekularbürsten sind Pickeringemulsionen, Polymerverarbeitung und Oberflächenbeschichtungen …”