AMIDE FUNCTIONALIZATION OF MULTIWALLED CARBON NANOTUBES AND THEIR EVALUATION FOR Hg(II) REMOVAL FROM WATER

This paper deals with the amide functionalization of multiwalled carbon nanotubes (MWNTs) and its evaluation for mercury removal from water. The functionalized MWNTs were characterized using FTIR for structural modification. The properties of MWNTs such as hydrophilic character, nature of surface, selective chemical interaction with mercury, etc., were significantly improved after functionalization making them promising adsorbents for mercury removal. The equilibrium is achieved in short time of 5 h resulting in up to 80% removal of Hg (II). Kinetics of adsorption was established and found to follow first-order reversible kinetics with forward and backward reaction rate constants 0.6648 and 0.1662, respectively.

Download Full-text

Thermodynamics and Kinetics of Adsorption of Diclofenac on Magnetic Multiwalled Carbon Nanotubes in an Aqueous Solution

Acta Physico-Chimica Sinica ◽

10.3866/pku.whxb20101130 ◽

2010 ◽

Vol 26 (11) ◽

pp. 2890-2898 ◽

Cited By ~ 6

Author(s):

XIONG Zhen-Hu ◽

◽

WANG Lu ◽

ZHOU Jian-Guo ◽

LIU Jian-Ming ◽

...

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solution ◽

Multiwalled Carbon Nanotubes ◽

Multiwalled Carbon ◽

Kinetics Of Adsorption ◽

Thermodynamics And Kinetics ◽

Magnetic Multiwalled Carbon Nanotubes ◽

Kinetics Of

Download Full-text

Experimental and theoretical investigation on the non-isothermal crystallization kinetics of polypropylene reinforced with multiwalled carbon nanotubes

Materials Today Proceedings ◽

10.1016/j.matpr.2020.04.137 ◽

2020 ◽

Vol 33 ◽

pp. 2264-2273

Author(s):

S. Sruthi ◽

R. Abhilash ◽

K. Tharun ◽

P. Gopi Krishna ◽

K. Jayanarayanan ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Crystallization Kinetics ◽

Theoretical Investigation ◽

Isothermal Crystallization ◽

Multiwalled Carbon ◽

Isothermal Crystallization Kinetics ◽

Kinetics Of

Download Full-text

Covalent functionalization of multiwalled carbon nanotubes with super-hydrophobic property

Journal of Polymer Engineering ◽

10.1515/polyeng-2017-0096 ◽

2018 ◽

Vol 38 (6) ◽

pp. 537-543 ◽

Cited By ~ 1

Author(s):

Minghua Li ◽

Zhiyuan Xu ◽

Jinyang Chen ◽

San-E Zhu

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Chemical Interaction ◽

Hydrophobic Property ◽

Covalent Functionalization ◽

Multiwalled Carbon ◽

Surface Contact Angle ◽

Loading Ratio ◽

Functionalized Mwcnts

AbstractSurface covalent functionalization of multiwalled carbon nanotubes (MWCNTs) is carried out by coupling of isocyanate-decorated MWCNTs with hydroxyl-terminated polydimethylsiloxane (HTPS), resulting in the formation of functionalized MWCNTs. Thermogravimetry analysis (TGA) of functionalized MWCNTs-1,2,3 exhibits the similar peaks in the temperature range of 200–500°C, which all correspond to the degradation of chemically grafted polyurethane on the nanotube surface. Field emission scanning electron microscopy (FE-SEM) reveals that as the polyurethane grafted onto the surface of MWCNTs loading ratio increased, the surface roughness of the MWCNTs is reduced. The chemical interaction of HTPS with isocyanate-decorated nanotube surface using the grafting-to strategy in a one-step process is confirmed by Fourier transform infrared spectroscopy (FT-IR). The surface contact angle of MWCNTs-3 with the largest content of polyurethane reached 171°, indicating that the surface covered with low surface energy polyurethane shows a super-hydrophobic property. The good dispersion of polyurethane-functionalized MWCNT-3, particularly at high content in the NR nanocomposites, is evidenced from transmission electron microscopy (TEM).

Download Full-text