Preparation and Exceptional Mechanical Properties of Bone-Mimicking Size-Tuned Graphene Oxide@Carbon Nanotube Hybrid Paper

ACS Nano
Jun Young OhChong Rae Park

Abstract

The self-assembled nanostructures of carbon nanomaterials possess a damage-tolerable architecture crucial for the inherent mechanical properties at both micro- and macroscopic levels. Bone, or "natural composite," has been known to have superior energy dissipation and fracture resistance abilities due to its unique load-bearing hybrid structure. However, few approaches have emulated the desirable structure using carbon nanomaterials. In this paper, we present an approach in fabricating a hybrid composite paper based on graphene oxide (GO) and carbon nanotube (CNT) that mimicks the natural bone structure. The size-tuning strategy enables smaller GO sheets to have more cross-linking reactions with CNTs and be homogeneously incorporated into CNT-assembled paper, which is advantageous for effective stress transfer. The resultant hybrid composite film has enhanced mechanical strength, modulus, toughness, and even electrical conductivity compared to previously reported CNT-GO based composites. We further demonstrate the usefulness of the size-tuned GOs as the "stress transfer medium" by performing in situ Raman spectroscopy during the tensile test.

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Citations

Dec 23, 2016·Physical Chemistry Chemical Physics : PCCP·H Tavassoli LarijaniM H Kiani
Dec 28, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Avijit PramanikParesh Chandra Ray
Sep 15, 2017·Tissue Engineering. Part B, Reviews·Longwei LvYongsheng Zhou
May 22, 2020·Current Stem Cell Research & Therapy·Tianxu ZhangRonghui Zhou

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