Designing Nanostructured 3D Printed Materials by Controlling Macromolecular Architecture

Nanostructured polymeric materials play important roles in many advanced applications, however, controlling the morphologies of polymeric thermosets remains a challenge. This work uses multi‐arm macroCTAs to mediate polymerization‐induced microphase separation (PIMS) and prepare nanostructured mater...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-08, Vol.61 (35), p.n/a
Main Authors: Shi, Xiaobing, Bobrin, Valentin A., Yao, Yin, Zhang, Jin, Corrigan, Nathaniel, Boyer, Cyrille
Format: Article
Language:English
Subjects:
3D printing
Actuators
Drug delivery
Fabrication
functional material
Macromolecules
Mechanical properties
Morphology
Nanostructure
Nanostructured materials
RAFT polymerization
Three dimensional printing
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Summary:Nanostructured polymeric materials play important roles in many advanced applications, however, controlling the morphologies of polymeric thermosets remains a challenge. This work uses multi‐arm macroCTAs to mediate polymerization‐induced microphase separation (PIMS) and prepare nanostructured materials via photoinduced 3D printing. The characteristic length scale of microphase‐separated domains is determined by the macroCTA arm length, while nanoscale morphologies are controlled by the macroCTA architecture. Specifically, using 2‐ and 4‐ arm macroCTAs provides materials with different morphologies compared to analogous monofunctional linear macroCTAs at similar compositions. The mechanical properties of these nanostructured thermosets can also be tuned while maintaining the desired morphologies. Using multi‐arm macroCTAs can thus broaden the scope of accessible nanostructures for extended applications, including the fabrication of actuators and potential drug delivery devices. This work demonstrates photopolymerization induced microphase separation (PIMS) for 3D printed materials with nanostructures, which for the first time, are controlled by the structure of macromolecular chain transfer agent (MacroCTA). Importantly, phase‐inverted morphologies featuring precisely defined domain spacings are obtained by using multi‐arm macroCTA, which is not accessible with linear macroCTA.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202206272