High performance natural rubber composites with conductive segregated network of multiwalled carbon nanotubes

2015 ◽  
Vol 116 ◽  
pp. 33-40 ◽  
Author(s):  
Neena George ◽  
Julie Chandra C.S. ◽  
A. Mathiazhagan ◽  
Rani Joseph
Keyword(s):  
Carbon Nanotubes ◽  
Natural Rubber ◽  
Multiwalled Carbon Nanotubes ◽  
High Performance ◽  
Rubber Composites ◽  
Multiwalled Carbon ◽  
Natural Rubber Composites

scholarly journals Resistance-strain sensitive rubber composites filled by multiwalled carbon nanotubes for structuraldeformation monitoring

2021 ◽  
Vol 11 ◽  
pp. 184798042110113
Author(s):  
Xingyao Liu ◽  
Rongxin Guo ◽  
Zhiwei Lin ◽  
Yang Yang ◽  
Haiting Xia ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Natural Rubber ◽  
Multiwalled Carbon Nanotubes ◽  
Resistance Strain ◽  
Multiwalled Carbon Nanotube ◽  
Strain Response ◽  
Rubber Composites ◽  
Multiwalled Carbon ◽  
Carbon Nanotube Networks

In this article, multiwalled carbon nanotube/natural rubber composites with resistance-strain sensitivity were prepared by solution method, when the electrical percolation threshold of multiwalled carbon nanotube is only ∼3.5 wt%. The mechanical properties and resistance-strain response sensitivity were studied and analyzed systematically. The dispersion of multiwalled carbon nanotubes in the natural rubber matrix was characterized by field-emission scanning electron microscope and X-ray diffractometer. The composite exhibits good deformation sensitivity (gauge factor >27), large strain sensing range (>200%), and high signal stability when multiwalled carbon nanotube content was appropriate. The composite is suited to application in strain monitoring of large deformation structures since the resistance-strain response is more stable when strain exceeds 100%. To understand the mechanism of the resistance-strain response, the ‘shoulder peak’ of resistance-strain curve was researched and explained by the digital image correlation method, and an analytical model was developed when considering the effects of electronic tunneling and hopping in multiwalled carbon nanotube networks. Both experiment and analytical results confirm the break-restructure process of multiwalled carbon nanotube networks under applied strain cause the resistance-strain response. Finally, the practical application of the composite to monitoring strain load of rubber isolation bearing was realized.

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