Irreversible synthesis of an ultrastrong two-dimensional polymeric material

Yuwen Zeng, Pavlo Gordiichuk, Takeo Ichihara, Ge Zhang, Emil Sandoz-Rosado, Eric D. Wetzel, Jason Tresback, Jing Yang, Daichi Kozawa, Zhongyue Yang, Matthias Kuehne, Michelle Quien, Zhe Yuan, Xun Gong, Guangwei He, Daniel James Lundberg, Pingwei Liu, Albert Tianxiang Liu, Jing Fan Yang, Heather J. Kulik and Michael S. Strano ()
Additional contact information
Yuwen Zeng: Massachusetts Institute of Technology
Pavlo Gordiichuk: Massachusetts Institute of Technology
Takeo Ichihara: Massachusetts Institute of Technology
Ge Zhang: Massachusetts Institute of Technology
Emil Sandoz-Rosado: U.S. Army Combat Capabilities Development Command, Army Research Laboratory
Eric D. Wetzel: U.S. Army Combat Capabilities Development Command, Army Research Laboratory
Jason Tresback: Harvard University
Jing Yang: Massachusetts Institute of Technology
Daichi Kozawa: Massachusetts Institute of Technology
Zhongyue Yang: Massachusetts Institute of Technology
Matthias Kuehne: Massachusetts Institute of Technology
Michelle Quien: Massachusetts Institute of Technology
Zhe Yuan: Massachusetts Institute of Technology
Xun Gong: Massachusetts Institute of Technology
Guangwei He: Massachusetts Institute of Technology
Daniel James Lundberg: Massachusetts Institute of Technology
Pingwei Liu: Massachusetts Institute of Technology
Albert Tianxiang Liu: Massachusetts Institute of Technology
Jing Fan Yang: Massachusetts Institute of Technology
Heather J. Kulik: Massachusetts Institute of Technology
Michael S. Strano: Massachusetts Institute of Technology

Nature, 2022, vol. 602, issue 7895, 91-95

Abstract: Abstract Polymers that extend covalently in two dimensions have attracted recent attention1,2 as a means of combining the mechanical strength and in-plane energy conduction of conventional two-dimensional (2D) materials3,4 with the low densities, synthetic processability and organic composition of their one-dimensional counterparts. Efforts so far have proven successful in forms that do not allow full realization of these properties, such as polymerization at flat interfaces5,6 or fixation of monomers in immobilized lattices7–9. Another frequently employed synthetic approach is to introduce microscopic reversibility, at the cost of bond stability, to achieve 2D crystals after extensive error correction10,11. Here we demonstrate a homogenous 2D irreversible polycondensation that results in a covalently bonded 2D polymeric material that is chemically stable and highly processable. Further processing yields highly oriented, free-standing films that have a 2D elastic modulus and yield strength of 12.7 ± 3.8 gigapascals and 488 ± 57 megapascals, respectively. This synthetic route provides opportunities for 2D materials in applications ranging from composite structures to barrier coating materials.

Date: 2022
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DOI: 10.1038/s41586-021-04296-3

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