Effects of Polyhedral Oligomeric Silsesquioxane Functionalized Multi-Walled Carbon Nanotubes on Thermal Oxidative Stability of Silicone Rubber

2014 ◽  
Vol 6 (6) ◽  
pp. 1244-1254 ◽  
Author(s):  
Yaling Wu ◽  
Yulian Bai ◽  
Junping Zheng
Keyword(s):  
Carbon Nanotubes ◽  
Oxidative Stability ◽  
Silicone Rubber ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Thermal Oxidative Stability ◽  
Multi Walled Carbon Nanotubes ◽  
Oligomeric Silsesquioxane ◽  
Walled Carbon Nanotubes

A New Approach to the Synthesis of Carbon Nanotube-Polyhedral Oligomeric Silsesquioxane (POSS) Nanohybrids

2015 ◽  
Author(s):  
Seyed Morteza Sabet ◽  
Hassan Mahfuz ◽  
Andrew C. Terentis ◽  
Javad Hashemi
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Amide Bonds ◽  
Covalent Grafting ◽  
Multi Walled Carbon Nanotubes ◽  
Functionalization Of Carbon Nanotubes ◽  
Oligomeric Silsesquioxane ◽  
Walled Carbon Nanotubes

To date, the functionalization of carbon nanotubes (CNTs) with Polyhedral Oligomeric Silsesquioxanes (POSS) has become one of the most intensively explored methods to produce CNT-based nanostructure composite materials. In this study, a simple and effective synthesizing method has been reported to prepare a nanohybrid material consisting of multi-walled carbon nanotubes (MWCNT) and aminopropylisobutyl-POSS. The approach is based on covalent bonding between CNTs and POSS molecules. Characterization of the as-received materials as well as the POSS-treated CNTs has been performed. Raman and Fourier transform infrared spectroscopic analyses verify the covalent grafting of POSS onto CNT walls through the formation of amide bonds. TEM studies reveal the attachment of relatively high amount of POSS to the CNT walls in POSS-treated product. TGA observations suggest that the presence of relatively high amount of POSS in MWCNT-POSS product is responsible for the thermal stability of CNTs at temperature range of RT–200 °C. The resulting nanohybrids with improved functionality and thermal stability would be good candidates as reinforcing materials for compatible polymer matrices.

Effect of functionalized multi-walled carbon nanotubes on physicomechanical properties of silicone rubber nanocomposites

2019 ◽  
Vol 53 (22) ◽  
pp. 3157-3168 ◽  
Author(s):  
Milind Shashikant Tamore ◽  
Debdatta Ratna ◽  
Satyendra Mishra ◽  
Navinchandra Gopal Shimpi
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Electron Microscope ◽  
Silicone Rubber ◽  
Rubber Matrix ◽  
Uniform Dispersion ◽  
Multi Walled Carbon Nanotubes ◽  
Rubber Nanocomposites ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Ethyl-4-aminocinnamate functionalized multi-walled carbon nanotubes–reinforced silicone rubber nanocomposites were developed by means of compounding (two roll-mill) and molding (compression). Meanwhile, multi-walled carbon nanotubes were synthesized using a catalytic chemical vapor deposition technique and functionalized using ethyl-4-aminocinnamate. The as-synthesized and functionalized multi-walled carbon nanotubes were subjected to Raman spectroscopy, Fourier-transform infrared spectroscopy, field emission scanning electron microscope, and transmission electron microscopy to know the presence of the functional group with its shape and size. Further, silicone rubber nanocomposites were subjected to study its mechanical (tensile strength, Young's modulus, and elongation at break), thermal (stability), and physical (swelling index and hardness) properties. The amount of loading of functionalized multi-walled carbon nanotubes was from 0 to 1 wt%. It was observed that with the increase in the amount of functionalized multi-walled carbon nanotubes loading, the properties were found to be increased. This improvement was due to uniform dispersion with the alignment of functionalized multi-walled carbon nanotubes inside the rubber matrix. Moreover, this improvement was due to weak functionalizing materials which make the surface smooth and glossy so as to facilitate uniform dispersion of materials. Also, thermal stability was found to be increased due to shifting of heat uniformly throughout the rubber matrix. Certainly, it reduces the swelling indices of silicone rubber as the chains are closely packed which does not allow a solution to get penetrated. This improvement in properties of silicone rubber nanocomposites was reflected from field emission scanning electron microscope, which shows uniform dispersion with the alignment of functionalized multi-walled carbon nanotubes inside the rubber matrix.

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