Influence of chemical functionalization of carbon nanotubes on their dispersibility in alkyl methacrylate polymer matrix

2017 ◽  
Vol 135 (14) ◽  
pp. 46113 ◽  
Author(s):  
Fabio Faraguna ◽  
Elvira Vidović ◽  
Ante Jukić
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Matrix ◽  
Alkyl Methacrylate ◽  
Chemical Functionalization ◽  
Functionalization Of Carbon Nanotubes

Chemical functionalization of carbon nanotubes with 3-methacryloxypropyltrimethoxysilane (3-MPTS)

2004 ◽  
Vol 13 (5) ◽  
pp. 1263-1267 ◽  
Author(s):  
Dibyendu S Bag ◽  
Rama Dubey ◽  
N Zhang ◽  
J Xie ◽  
V K Varadan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Functionalization ◽  
Functionalization Of Carbon Nanotubes

scholarly journals Chemical Functionalization of Carbon Nanotubes and its Effects on Electrical Conductivity

2014 ◽  
Vol 28 ◽  
pp. 51-61 ◽  
Author(s):  
José Encarnación Moreno Marcelino ◽  
Enrique Vigueras Santiago ◽  
Gustavo Lopez-Tellez ◽  
Susana Hernández López
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Electrical Conductivity ◽  
Functional Groups ◽  
Compression Technique ◽  
Chemical Functionalization ◽  
Mechanical Stirring ◽  
Chemically Modified ◽  
Functionalization Of Carbon Nanotubes ◽  
Microraman Spectroscopy

This work presents the study of the electrical conductivity in MWNT as a function of three different chemical functionalization conditions. Unmodified and chemically modified MWNT were characterized by microRaman spectroscopy, XPS and SEM whereas the electrical conductivity was determined by dust compression technique. MWNT were modified using three different oxidation conditions: (1) a mix of concentrated acids, H2SO4/HNO3 (3:1, v/v) sonicated for 2 h; (2) same mixture as (1) but using mechanical stirring for 6 h and (3) a reflux of an aqueous solution of HNO3 (20%, v/v) and mechanical stirring for 6 h. The characterization evidenced different functionalization degrees, based on the formation and detection of functional groups such as ether, carbonyl and carboxyl in different percentages. The unmodified CNT presented a conductivity of 510 S/m which decreased as the functionalization degree increased. For reactions (1) and (2) such conductivity was reduced by 8.8 and 15.5%, respectively, whereas for condition (3) it only decreased 0.98%.

Degree of Chemical Functionalization of Carbon Nanotubes Determines Tissue Distribution and Excretion Profile

2012 ◽  
Vol 51 (26) ◽  
pp. 6389-6393 ◽  
Author(s):  
Khuloud T. Al-Jamal ◽  
Antonio Nunes ◽  
Laura Methven ◽  
Hanene Ali-Boucetta ◽  
Shouping Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Tissue Distribution ◽  
Chemical Functionalization ◽  
Functionalization Of Carbon Nanotubes

scholarly journals STRUCTURAL MODEL OF EFFICIENCY OF COVALENT FUNCTIONALIZATION OF CARBON NANOTUBES

2019 ◽  
Vol 62 (10) ◽  
pp. 118-123
Author(s):  
Georgii V. Kozlov ◽  
Igor V. Dolbin
Keyword(s):  
Carbon Nanotubes ◽  
Specific Surface ◽  
Polymer Matrix ◽  
Structural Model ◽  
Quantitative Estimation ◽  
Quantitative Characteristic ◽  
Point Of View ◽  
Prediction Of Mechanical Properties ◽  
Functionalization Of Carbon Nanotubes ◽  
Two Parameters

Functionalization of carbon nanotubes (covalent and noncovalent ones) is effective and often applied method of enhancement of their interaction with polymer matrix of nanocomposites. In present work the treatment is proposed, for the first time allowing quantitative estimation of efficiency (quality) of this nanofiller functionalization. For this purpose proposed earlier generalized model was used, taking into consideration characteristics of matrix polymer and nanofiller and also type of the last. Application of the indicated model allows to obtain quantitative characteristic of functionalization efficiency and also elucidation of interconnection of the indicated efficiency with structure of carbon nanotubes in polymer matrix of nanocomposite, namely, with radius of their annular structures. It has been found that the same method of functionalization from the chemical point of view can be changed its efficiency in 20 times that is dependent upon structure (radius) of annular formations of carbon nanotubes. Their specific surface is the more precise characteristic of these formations. This surface serves as indicator of intensity of contact of polymer matrix and surface of nanotubes, which in the end forms mechanical and other properties of the considered nanocomposites. The equation has been obtained, showing the dependence of functionalization efficiency on two parameters: effective specific surface and content of carbon nanotubes. The sharp discrete reduction of functionalization occurs at reaching of percolation threshold of nanofiller. This means that functionalization of local structures of carbon nanotubes is more effective than functionalization of uninterrupted structures of this nanofiller. The most important mechanical property of polymer nanocomposites, namely, the reinforcement degree, is defined unequivocally by efficiency of functionalization. This approach allows making structural prediction of mechanical properties of nanocomposites polymer/carbon nanotube depending of efficiency of nanofiller functionalization.

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