We have recently developed mass-producing, low-cost, and free-standing nanosheets using topological self-assembly of β-cyclodextrins (CDs) and poly(ethylene oxide)75-b-poly(propylene oxide)29-b-poly(ethylene oxide)75 (EO75PO29EO75) triblock copolymer, namely, pseudo-polyrotaxane (PPR) nanosheet by hierarchically ordered supramolecular self-assembly. The PPR nanosheets were obtained by just mixing triblock copolymer and β-CD in water at room temperature. β-CDs threaded on poly(propylene glycol) segment of the triblock copolymer to form a monoclinic single crystal with a dimension of 10-20 nm thickness and a few micro meters size. The PPR nanosheet can be applied to a novel drag delivery system with cell adhesiveness. In this talk, we will suggest a new common method to construct polymer brush layer on various kind of materials surfaces using PPR nanosheet. The β-CDs selectively cover the central PO29 segment and this inclusion complex assembled each other, resulting in the formation of nanosheet particles consisting of β-CD columnar crystal. The EO chains on/below PPRNS formed a polymer brush. In this study, we successfully show that the EO chains on/below PPR nanosheet take brush layer using neutron reflectivity method, which is a powerful tool to prove brush layer in solution. Not only that, we succeeded in adhering the PPR nanosheet on various kind of material surfaces and demonstrating the antifouling property of PPR nanosheet-covered Si substrate.

Pseudo-polyrotaxane nanosheet and Its application to polymer brush

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.