Sequentially bridged graphene sheets with high strength, toughness, and electrical conductivity
Abstract
There is a continuing search for manufacturable sheets having high strength and toughness in all sheet directions for diverse applications, from airplanes to windmills. Cross-plied carbon fibers in a polymer resin requiring high-temperature cure presently provide the common solution. We demonstrate cross-linked graphene sheets that are manufacturable from graphene platelets, which are resin-free, processable at low temperature, contain less than 10 wt % additives, and provide high strength and record toughness in all in-plane directions. This advance results from successive use of π–π and covalent cross-linking agents. Simultaneous enhancement of strength, durability, and electrical conductivity are demonstrated. Spectroscopic measurements, including Raman studies of interplatelet stress transfer, elucidate the chemical nature and physical consequences of these dual cross-linking agents.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 07, 2018
- Source ID
- 10.1073/pnas.1719111115
Entities
People
- Ali E Aliev
- Jiuke Mu
- Lei Jiang
- Nicholas A. Kotov
- Qunfeng Cheng
- Ray H. Baughman
- Shaoli Fang
- Sijie Wan
- Yuchen Li
Organizations
- Air Force Office of Scientific Research
- Beihang University
- National Natural Science Foundation of China
- National Science Foundation
- University of Michigan
- University of Texas at Dallas