TY - JOUR
T1 - Mechanical performance of highly compressible multi-walled carbon nanotube columns with hyperboloid geometries
AU - Whitby, Raymond L.D.
AU - Mikhalovsky, Sergey V.
AU - Gun'ko, Vladimir M.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Multi-walled carbon nanotube (MWCNT) columns are formed from the frit compression of a random distribution of MWCNTs in a casting solvent; its drying led to the formation of hyperboloid geometry. Uniaxial loading of MWNT columns mimics an open-cell foam behaviour and possesses an expansion rate in excess of 250 mm min-1 and an elastic modulus of 10-12 MPa, thus superior to conventional low-density flexible foams. Successive compression-expansion cycling within the Hookean region reveals a hysteresis loop in the stress-strain curve that stabilises at a final value of εF = 18%, but on contact with its casting solvent and subsequent drying, the sample can be regenerated to within εR = 6% according to a memory effect and is repeatable in successive stress cycles and solvent regeneration. The system was modelled for the macroscopic stress-strain behaviour of the MWCNT column to reveal the contributions of linear dependence, elasticity-plasticity and elasticity-plasticity with hardening, revealing good agreement with the stress-strain data. MWCNT columns should prove useful as an energy adsorbing device.
AB - Multi-walled carbon nanotube (MWCNT) columns are formed from the frit compression of a random distribution of MWCNTs in a casting solvent; its drying led to the formation of hyperboloid geometry. Uniaxial loading of MWNT columns mimics an open-cell foam behaviour and possesses an expansion rate in excess of 250 mm min-1 and an elastic modulus of 10-12 MPa, thus superior to conventional low-density flexible foams. Successive compression-expansion cycling within the Hookean region reveals a hysteresis loop in the stress-strain curve that stabilises at a final value of εF = 18%, but on contact with its casting solvent and subsequent drying, the sample can be regenerated to within εR = 6% according to a memory effect and is repeatable in successive stress cycles and solvent regeneration. The system was modelled for the macroscopic stress-strain behaviour of the MWCNT column to reveal the contributions of linear dependence, elasticity-plasticity and elasticity-plasticity with hardening, revealing good agreement with the stress-strain data. MWCNT columns should prove useful as an energy adsorbing device.
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U2 - 10.1016/j.carbon.2009.08.042
DO - 10.1016/j.carbon.2009.08.042
M3 - Article
AN - SCOPUS:70350012282
VL - 48
SP - 145
EP - 152
JO - Carbon
JF - Carbon
SN - 0008-6223
IS - 1
ER -