Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163207
Title: Dumbbell-shaped block copolymers for the fabrication of anisotropic soft actuators
Authors: Pan, Houwen Matthew
Chan, Jonathan Kai Bin
Sarkar, Jit
Goto, Atsushi
Keywords: Science::Chemistry
Issue Date: 2022
Source: Pan, H. M., Chan, J. K. B., Sarkar, J. & Goto, A. (2022). Dumbbell-shaped block copolymers for the fabrication of anisotropic soft actuators. ACS Applied Polymer Materials, 4(7), 5144-5151. https://dx.doi.org/10.1021/acsapm.2c00658
Project: NRF-NRFI05-2019-0001
Journal: ACS Applied Polymer Materials
Abstract: The self-assembly of bottlebrush or comb copolymers into well-ordered structures can be accurately controlled to create functional materials for smart elastomeric actuators. However, to date, bottlebrush or comb copolymer self-assemblies have only been utilized in fabricating isotropic actuators. In this work, we report on the first synthesis of anisotropic soft actuators from comb triblock copolymers. Dumbbell-shaped comb block copolymers (BCPs) with poly(dimethylsiloxane) (PDMS) side chains were crosslinked via poly(butyl acrylate) (PBA) to form actuators that exhibited reversible actuation, fast response (5 min), a high anisotropic swelling strain (51% in the x-axis and 98% in the y-axis), and bending on the z-axis in an organic solvent. Characterization of anisotropic actuator strips pointed to a lamellar-like arrangement of PBA segments sandwiched between PDMS layers. Anisotropic swelling was programmed in single-layer actuators through shear-induced alignment (x-y axis) and phase separation (z-axis) of dumbbell-shaped BCPs without any additional patterning steps. Actuator bending was also significantly increased (330°) via the orthogonal arrangement of anisotropic bilayers.
URI: https://hdl.handle.net/10356/163207
ISSN: 2637-6105
DOI: 10.1021/acsapm.2c00658
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Polymer Materials, copyright © 2022 American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsapm.2c00658.
Fulltext Permission: embargo_20230715
Fulltext Availability: With Fulltext
Appears in Collections:CCEB Journal Articles
SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
NTU DR.pdf
  Until 2023-07-15
2.13 MBAdobe PDFUnder embargo until Jul 15, 2023

Page view(s)

29
Updated on Jan 27, 2023

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.