Self-Healing Polymer Composites Based on Hydrogen Bond Reinforced with Graphene Oxide

Yue Chen 1

Ying Wang 1

Tai Su 1

Jiayi Chen 1

Chao Zhang 1

Xiaoxing Lai 1

Dawei Jiang 1, 2, Email

Zijian Wu 3

Caiying Sun 1

Bin Li 1, 2, Email

Zhanhu Guo 4, Email

College of Science, Northeast Forestry University, Harbin 150040,China
Post-doctoral Mobile Research Station of Forestry Engineering, Northeast Forestry University, Harbin 150040, China
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150040, China
Integrated Composites Laboratory (ICL), Department of Chemical Engineering, University of Tennessee, Knoxville TN 37996, USA

Abstract

A self-healing supramolecular polymer composite (LP-GO) is designed and prepared via incorporation of graphene oxide (GO) to hyperbranched polymer by hydrogen-bonding interactions. The polymer matrix based on amino-terminated hyperbranched polymer is synthesized by dimer acid and diethylene triamine, while GO is prepared by the modified Hummers method. Infrared spectroscopy (FTIR), thermo gravimetric testing (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM) is applied to characterize GO. Stressstrain test is utilized to characterize the obtained self-healing property of LP-GO. It is found that just a small amount of GO (up to 3 wt %) is needed to achieve a dramatic improvement in the mechanical properties, and self-healing efficiency of the polymer composites. After healing at 60 oC for 1 h, the addition of GO even restores the self-healing efficiency to 100% of its original tensile strength. In striking contrast to conventional cross-linked or thermoreversible rubbers made of macromolecules, these systems, when being broken or cut, can be simply healed by contacting fractured areas again to self-heal at suitable temperature. Building on the unique self-healing properties, the simplicity of synthesis and the availability from renewable resources, etc., LP-GO bodes well for broader applications in the near future.

Self-Healing Polymer Composites Based on Hydrogen Bond Reinforced with Graphene Oxide