Living Additive Manufacturing: Transformation of Parent Gels into Diversely Functionalized Daughter Gels Made Possible by Visible Light Photoredox Catalysis
Name
acscentsci.6b00335.pdf
Size
9.86 MB
Format
Adobe PDF
Checksum (MD5)
267f642b73c7d0ae987e9e993aaa122e
Author(s)
Chen, Mao
Gu, Yuwei
Singh, Awaneesh
Zhong, Mingjiang
Jordan, Alex M.
Biswas, Santidan
Korley, LaShanda T. J.
Balazs, Anna C.
Johnson, Jeremiah A.
Date Issued
January 2017
Journal
ACS Central Science
Publisher
American Chemical Society (ACS)
Citation
Chen, Mao et al. “Living Additive Manufacturing: Transformation of Parent Gels into Diversely Functionalized Daughter Gels Made Possible by Visible Light Photoredox Catalysis.” ACS Central Science 3, 2 (January 2017): 124–134 © 2017 American Chemical Society
Version
Final published version
Abstract
Light-initiated additive manufacturing techniques typically rely on layer-by-layer addition or continuous extraction of polymers formed via nonliving, free radical polymerization methods that render the final materials "dead" toward further monomer insertion; the polymer chains within the materials cannot be reactivated to induce chain extension. An alternative "living additive manufacturing" strategy would involve the use of photocontrolled living radical polymerization to spatiotemporally insert monomers into dormant "parent" materials to generate more complex and diversely functionalized "daughter" materials. Here, we demonstrate a proof-of-concept study of living additive manufacturing using end-linked polymer gels embedded with trithiocarbonate iniferters that can be activated by photoinduced single-electron transfer from an organic photoredox catalyst in solution. This system enables the synthesis of a wide range of chemically and mechanically differentiated daughter gels from a single type of parent gel via light-controlled modification of the parent's average composition, strand length, and/or cross-linking density. Daughter gels that are softer than their parent, stiffer than their parent, larger but with the same modulus as their parent, thermally responsive, polarity responsive, healable, and weldable are all realized.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/ACSCENTSCI.6B00335
