https://dx.doi.org/10.1016/j.chempr.2021.06.004">
 

Kinetic trapping of 3D-printable cyclodextrin-based poly(pseudo)rotaxane networks

Abstract

Synthetically trapping kinetically varied (super)structures of molecular assemblies and amplifying them to the macroscale is a promising, yet challenging, approach for the advancement of meta-stable materials. Here, we demonstrated a concerted kinetic trapping design to timely resolve a set of transient polypseudorotaxanes in solution and harness a crop of them via micro-crystallization. By installing stopper or speed bump moieties on the polymer axles, meta-stable polypseudorotaxanes with segmented cyclodextrin blocks were hierarchically amplified into crystalline networks of different crosslinking densities at mesoscale and viscoelastic hydrogels with 3D-printability in bulk. We demonstrated simultaneous 3D-printing of two polypseudorotaxane networks from one reactive ensemble and their conversion to heterogeneous polyrotaxane monoliths. Spatially programming the macroscale shapes of these heterogeneous polyrotaxanes enabled the construction of moisture-responsive actuators, in which the shape morphing originated from the different numbers of cyclodextrins interlocked in these polyrotaxane networks.

Publication Date

6-29-2021

Publisher

Elsevier

Journal Title

Chem

Digital Object Identifier (DOI)

https://dx.doi.org/10.1016/j.chempr.2021.06.004

Document Type

Article

Rights

© 2021 Elsevier Inc.

Comments

This is an Open Access article published by Elsevier in Chem in 2021, available online: https://dx.doi.org/10.1016/j.chempr.2021.06.004

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