Integrated Random-Aligned Carbon Nanotube Layers: Deformation. Mechanism under Compression. Zhiping Zeng1, Xuchun Gui1,* , Qiming Gan1, Zhiqiang ...
Electronic Supplementary Material (ESI) for Nanoscale This journal is © The Royal Society of Chemistry 2013
Integrated
Random-Aligned
Carbon
Nanotube
Layers:
Deformation
Mechanism under Compression Zhiping Zeng1, Xuchun Gui1,* , Qiming Gan1, Zhiqiang Lin1, Yuan Zhu1, Wenhui Zhang1, Rong Xiang1, Anyuan Cao2 and Zikang Tang1,3 1
State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and
Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China 2
Department of Materials Science and Engineering, College of Engineering, Peking University,
Beijing 100871, P. R. China 3
Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay,
Kowloon, Hong Kong, China
Supporting Information εc=0%
εc=23%
εc=32%
εc=37%
εc=45%
εc=48%
εc=52%
εc=56%
500 μm
εc=54%
εc=48%
εc=43%
εc=40%
εc=35%
εc=25%
εc=22%
εc=0%
Fig. S1 Low magnification SEM observed the deformation process of the double layered structure with the compressive strain gradually increased to 56% and then decreased to 0 %. ε c is the strain of the composite.
Electronic Supplementary Material (ESI) for Nanoscale This journal is © The Royal Society of Chemistry 2013
50 μm
5 μm
50 μm
5 μm
εc=32%, εs=77%, εa=0%
500 μm
50 μm
5 μm
Fig. S2 SEM images of sponge-array double layered structure under the compressive strain of 32 %.
Electronic Supplementary Material (ESI) for Nanoscale This journal is © The Royal Society of Chemistry 2013
εc=52%, εs>99%, εa=18%
50 μm
5 μm
500 μm
50 μm
5 μm
Fig. S3 SEM images of sponge-array double layered structure under the compressive strain of 52 %.
Electronic Supplementary Material (ESI) for Nanoscale This journal is © The Royal Society of Chemistry 2013
(b) 2.5
2.5 cycle 1 2 10 20 30 40 50
2.0 1.5 1.0
Compressive stress (MPa)
Compressive stress (MPa)
(a)
0.5 0.0 0.0
0.1
0.2
0.3
Compressive strain
2.0 1.5 1.0
cycle 1 2 10 20 30 40 50
0.5 0.0 0.0
0.2
0.4
0.6
0.8
1.0
Compressive strain
Fig. S4 (a) Compressive stress-strain curves of a CNT array for 50 cycles. (b) Compressive stress-strain curves of a CNT sponge for 50 cycles.
Electronic Supplementary Material (ESI) for Nanoscale This journal is © The Royal Society of Chemistry 2013
Table S1. Energy absorption, energy dissipation, and energy loss coefficient (ΔE/E) values of the composite, sponge and array Energy
Energy
absorption
dissipation
(KJ/m3)
(KJ/m3)
1st
160.0
108.2
0.68
50th
56.7
28.7
0.51
1st
405.5
228.2
0.56
50th
140.1
48.5
0.35
Double-layered
1st
282.8
181.8
0.64
composite
50th
92.2
38.5
0.42
Samples
Sponge
Array
Cycle
ΔE/E
