journal article·2017-04-26

Light-Stimulated Permanent Shape Reconfiguration in Cross-Linked Polymer Microparticles

Lewis Michael Cox, Xiaohao Sun, Chen Wang, Nancy Sowan, Jason P. Killgore, Rong Long, Heng-An Wu, Christopher N. Bowman, Yifu Ding

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Abstract

Reconfiguring the permanent shape of elastomeric microparticles has been impossible due to the incapability of plastic deformation in these materials. To address this limitation, we synthesize the first instance of microparticles comprising a covalent adaptable network (CAN). CANs are cross-linked polymer networks capable of reconfiguring their network topology, enabling stress relaxation and shape changing behaviors, and reversible addition-fragmentation chain transfer (RAFT) is the corresponding dynamic chemistry used in this work to enable CAN-based microparticles. Using nanoimprint lithography to apply controllable deformations we demonstrate that upon light stimulation microparticles are able to reconfigure their shape to permanently fix large aspect ratios and nanoscale surface topographies.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Polymer composites and self-healing · Advanced Polymer Synthesis and Characterization · Advanced Materials and Mechanics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309-0427, United States

Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0596, United States

Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, Colorado 80305, United States

CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China

Material Science and Engineering Program, University of Colorado, Boulder, Colorado 80309-0596, United States

Funding

National Institute of Dental and Craniofacial Research · Division of Civil, Mechanical and Manufacturing Innovation · Division of Chemical, Bioengineering, Environmental, and Transport Systems · National Natural Science Foundation of China · Division of Materials Research · Chinese Academy of Sciences

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